<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                    FORM 10-Q

(Mark-One)
(X)      QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934

                 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1999.

                                       OR

( )      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934

              FOR THE TRANSITION PERIOD FROM ________ TO _________

                          COMMISSION FILE NUMBER 0-9514

                               ANDREW CORPORATION
             (Exact name of Registrant as specified in its charter)

         DELAWARE                                                36-2092797
(State or other jurisdiction of                                (IRS Employer
incorporation or organization)                               identification No.)

               10500 W. 153RD STREET, ORLAND PARK, ILLINOIS 60462
              (Address of principal executive offices and zip code)

                                 (708) 349-3300
              (Registrant's telephone number, including area code)

                                    NO CHANGE
              (Former name, former address and former fiscal year,
                          if changed since last report)

Indicate by check mark whether the Registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period as the Registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.

         Yes  X    No       
             ---      ---

Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of the latest practical date.


         Common Stock, $.01 Par Value-- 82,292,006 shares as of April 30, 1999


<PAGE>   2


                                      INDEX
                               ANDREW CORPORATION

PART I.             FINANCIAL INFORMATION

Item 1.             Financial Statements (Unaudited)

                    Consolidated balance sheets--March 31, 1999 and
                    September 30, 1998.

                    Consolidated statements of income--Three and six
                    months ended March 31, 1999 and 1998.

                    Consolidated statements of cash flows--Six months
                    ended March 31, 1999 and 1998.

                    Notes to consolidated financial statements--March 31,
                    1999.

Item 2.             Management's Discussion and Analysis of Financial 
                    Condition and Results of Operations.


PART II.          OTHER INFORMATION

Item 4.             Submission of Matters to a Vote of Security Holders

Item 6.             Exhibits and Reports on Form 8-K.

Exhibit 27          Financial Data Schedule for the period ended March 31, 1999.



SIGNATURES




<PAGE>   3


                               ANDREW CORPORATION
                           CONSOLIDATED BALANCE SHEETS
                             (Dollars in thousands)


<TABLE>
<CAPTION>
                                                               MARCH 31         September 30
ASSETS                                                           1999              1998
                                                              ----------        ------------
                                                              (UNAUDITED)
<S>                                                            <C>              <C>         
CURRENT ASSETS
Cash and cash equivalents                                      $  45,636        $  78,395   
Accounts receivable, less allowances                                                        
   (Mar. $3,419;  Sep. $3,026)                                   160,144          181,389   
Inventories                                                                                 
   Finished products                                              59,964           56,736   
   Materials and work in process                                 109,024          111,057   
                                                               ---------        ---------   
                                                                 168,988          167,793   
                                                                                            
Miscellaneous current assets                                       9,950            9,229   
                                                               ---------        ---------   
TOTAL CURRENT ASSETS                                             384,718          436,806   
                                                               ---------        ---------   
                                                                                            
OTHER ASSETS                                                                                
Cost in excess of net assets of businesses                                                  
   acquired, less accumulated amortization                                                  
   (Mar. $3,953;  Sep. $10,291)                                   12,550           23,177   
Investments in and advances to affiliates                         59,814           59,691   
Investments and other assets                                       6,858            9,267   
                                                                                            
PROPERTY, PLANT AND EQUIPMENT                                                               
Land and land improvements                                        16,696           15,507   
Buildings                                                         82,387           83,789   
Equipment                                                        315,690          301,757   
Allowances for depreciation                                     (257,785)        (247,091)  
                                                               ---------        ---------   
                                                                 156,988          153,962   
                                                               ---------        ---------   
TOTAL ASSETS                                                   $ 620,928        $ 682,903   
                                                               =========        =========   
</TABLE>


The balance sheet at September 30, 1998 has been derived from the audited
financial statements at that date.

See Notes to Consolidated Financial Statements


<PAGE>   4


                               ANDREW CORPORATION
                           CONSOLIDATED BALANCE SHEETS
                      (In thousands, except share amounts)
                                   (Continued)


<TABLE>
<CAPTION>
                                                             MARCH 31       September 30
                                                               1999              1998
                                                          --------------    ------------
                                                           (UNAUDITED)
<S>                                                        <C>              <C>      
LIABILITIES AND STOCKHOLDERS' EQUITY

CURRENT LIABILITIES
Notes payable                                                 $   2,464    $  13,897
Accounts payable                                                 29,928       32,867
Accrued expenses and other liabilities                           17,539       16,856
Compensation and related expenses                                19,458       32,424
Income taxes                                                     11,441       15,835
Restructuring reserve                                            14,740          242
Current portion of long-term debt                                 5,947        4,568
                                                              ---------    ---------
TOTAL CURRENT LIABILITIES                                       101,517      116,689
                                                              ---------    ---------

DEFERRED LIABILITIES                                             13,261       14,044

LONG-TERM DEBT, LESS CURRENT PORTION                             43,714       38,031

MINORITY INTEREST                                                 4,730        5,361

STOCKHOLDERS' EQUITY
Common stock (par value, $.01 a share:
   400,000,000 shares authorized; 102,718,210
     shares issued, including treasury)                           1,027        1,027
Additional paid-in capital                                       55,115       53,309
Accumulated other comprehensive income                          (21,589)      (7,617)
Retained earnings                                               653,435      651,103
Treasury stock, at cost (20,426,204 shares in Mar.;
   18,210,250 shares in Sep.)                                  (230,282)    (189,044)
                                                              ---------    ---------
                                                                457,706      508,778
                                                              ---------    ---------

TOTAL LIABILITIES AND EQUITY                                  $ 620,928    $ 682,903
                                                              =========    =========
</TABLE>


The balance sheet at September 30, 1998 has been derived from the audited
financial statements at that date.

See Notes to Consolidated Financial Statements


<PAGE>   5



                               ANDREW CORPORATION
                  CONSOLIDATED STATEMENT OF INCOME (UNAUDITED)
                    (In thousands, except per share amounts)




<TABLE>
<CAPTION>
                                          Three Months Ended        Six Months Ended
                                              March 31                 March 31
                                       ------------------------------------------------
                                          1999         1998         1999         1998
                                       ---------    ---------    ---------    ---------
<S>                                    <C>          <C>          <C>          <C>      
Sales                                  $ 172,006    $ 196,872    $ 390,579    $ 428,008
Cost of Products Sold                    126,840      119,762      265,881      261,301
                                       ---------    ---------    ---------    ---------

Gross Profit                              45,166       77,110      124,698      166,707

Operating Expenses
Research and development                   7,283        6,255       12,914       13,326
Sales and administrative                  32,748       34,828       71,663       73,265
Restructuring expenses                    29,817            0       29,817            0
                                       ---------    ---------    ---------    ---------
Total Operating Expenses                  69,848       41,083      114,394       86,591
                                       ---------    ---------    ---------    ---------

Operating Income                         (24,682)      36,027       10,304       80,116

Other
Interest expense                           1,216        1,547        2,668        3,161
Interest income                           (1,799)      (1,821)      (3,822)      (2,894)
Other (income) expense                     1,626         (284)       2,061          332
                                       ---------    ---------    ---------    ---------
                                           1,043         (558)         907          599
                                       ---------    ---------    ---------    ---------

Pretax Income                            (25,725)      36,585        9,397       79,517

Income Taxes                              (4,876)      12,438        7,065       27,036
                                       ---------    ---------    ---------    ---------

Net Income                             $ (20,849)   $  24,147    $   2,332    $  52,481
                                       ---------    ---------    ---------    ---------


Basic and Diluted Earnings per Share   $    (.25)   $     .27    $     .03    $     .59
                                       ---------    ---------    ---------    ---------

Average Shares Outstanding
  Basic                                   82,610       88,498       83,219       88,831
                                       ---------    ---------    ---------    ---------

  Diluted                                 82,610       88,942       83,339       89,319
                                       ---------    ---------    ---------    ---------

</TABLE>


See Notes to Consolidated Financial Statements



<PAGE>   6


                               ANDREW CORPORATION
                CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)
                                 (In thousands)


<TABLE>
<CAPTION>
                                                            Six Months Ended
                                                        March 31      March 31
                                                          1999          1998
                                                      --------------------------
<S>                                                   <C>          <C>      
Cash Flow from Operations
  Net Income                                           $   2,332    $  52,481

Adjustments to Net Income
  Restructuring costs                                     36,051         (243)
  Depreciation and amortization                           17,942       17,474
  Decrease in accounts receivable                         14,053       19,403
  Increase in inventories                                (11,270)      (8,760)
  Increase in miscellaneous
    current and other assets                                (811)      (1,892)
  Decrease in receivables from affiliates                  2,940            0
  Decrease in accounts payable and other liabilities     (13,545)        (270)
  Other                                                     (488)        (313)
                                                       ---------    ---------
Net Cash From Operations                                  47,204       77,880

Investing Activities
  Capital Expenditures                                   (27,345)     (27,534)
  Acquisition of business, net of cash acquired           (5,545)      (3,000)
  Investments in and advances to affiliates                 (949)       7,999
  Proceeds from sales of property, plant
    and equipment                                            669          296
                                                       ---------    ---------
Net Cash Used In Investing Activities                    (33,170)     (22,239)

Financing Activities
  Proceeds from long-term borrowings                       3,153        6,205
  Payments on short-term borrowings                       (5,320)      (3,836)
  Purchase of treasury stock                             (46,488)     (32,463)
  Stock purchase and option plans                          1,242        1,642
                                                       ---------    ---------
Net Cash Used In Financing Activities                    (47,413)     (28,452)

Effect of  exchange rate changes on cash                     620       (2,480)
                                                       ---------    ---------

Total (Decrease) increase for the period                 (32,759)      24,709

Cash and equivalents at beginning of period               78,395       93,823
                                                       ---------    ---------

Cash and equivalents at end of period                  $  45,636    $ 118,532
                                                       ---------    ---------
</TABLE>


See Notes to Consolidated Financial Statements


<PAGE>   7



                               ANDREW CORPORATION
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE A--BASIS OF PRESENTATION

The accompanying unaudited consolidated financial statements have been prepared
in accordance with generally accepted accounting principles for interim
financial information and with the instructions to Form 10-Q and Rule 10-01 of
Regulation S-X. Accordingly, they do not include all of the information and
footnotes required by generally accepted accounting principles for complete
financial statements. In the opinion of management, all adjustments (consisting
of normal recurring accruals) considered necessary for a fair presentation have
been included. Operating results for the six month period ended March 31, 1999
are not necessarily indicative of the results that may be expected for the year
ending September 30, 1999. For further information, refer to the consolidated
financial statements and footnotes thereto included in the Company's annual
report on Form 10-K for the year ended September 30, 1998.

NOTE B--EARNINGS PER SHARE

The following table sets forth the computation of basic and diluted earnings per
share:


<TABLE>
<CAPTION>
                                                Three Months Ended    Six Months Ended
                                                     March 31            March 31
                                                -------------------   -----------------
(In thousands, except per share amounts)          1999       1998      1999      1998
                                                ---------  --------   -------  --------
<S>                                              <C>        <C>       <C>       <C>    
BASIC EARNINGS PER SHARE
Numerator:
     Numerator for net income per share         ($20,849)   $24,147   $ 2,332   $52,481 
                                                                                        
Denominator:                                                                            
     Weighted average shares outstanding          82,610     88,498    82,219    88,831 
                                                ========    =======   =======   ======= 
                                                                                        
Net income per share - basic                    ($  0.25)   $  0.27   $  0.03   $  0.59 
                                                ========    =======   =======   ======= 
                                                                                        
DILUTED EARNINGS PER SHARE                                                              
Numerator:                                                                              
     Numerator for net income per share         ($20,849)   $24,147   $ 2,332   $52,481 
                                                                                        
Denominator:                                                                            
     Weighted average shares outstanding          82,610     88,498    82,219    88,831 
     Effect of dilutive securities:                                                     
          Stock options                              N/A        444       120       488 
                                                --------    -------   -------   -------
                                                  82,610     88,942    83,339    89,319 
                                                ========    =======   =======   ======= 
                                                                                        
Net income per share - diluted                  ($  0.25)   $  0.27   $  0.03   $  0.59 
                                                ========    =======   =======   ======= 
</TABLE>
                                                                               


Options to purchase 2,872,441 shares of common stock, at prices ranging from
$16.00 - $38.17 per share, were not included in the computation of diluted
earnings per share for the six months ended March 1999, because the option's
exercise price was greater than the average market price of the common shares.
No options to purchase common shares were used in the computation of diluted
earnings per share for the three months ending March 1999, due to the
antidutilve effect of these shares. Options to purchase 772,000 shares of common
stock at prices ranging from $24.00 - $38.17 per share were not included in the
March 1998 diluted earnings per share calculation since the option's exercise
price was higher than the average market price of the common shares.


NOTE C--COMPREHENSIVE INCOME

In June 1997, the FASB issued Statement of Financial Accounting Standards No.
130, "Reporting Comprehensive Income". Statement No. 130 establishes new rules
for the reporting and display of comprehensive income and its components. The
adoption of this statement had no impact on the company's net income or
stockholders' equity. Statement No. 130 requires the company to report foreign
currency translation adjustments, which were previously 


<PAGE>   8

reported as a separate component of stockholders' equity, as a component of
other comprehensive income. Prior year financial statements have been
reclassified to conform with the requirements of Statement No. 130.
Comprehensive income for the six months ended March 31, 1999 and 1998 amounted
to ($11,640,000) and $47,166,000 respectively. Comprehensive income for the
three months ended March 31, 1999 and 1998 amounted to ($33,008,000) and
$23,889,000 respectively


NOTE D--RESTRUCTURING

In March 1999, the company initiated a plan to restructure the manufacturing
operations of its towers and wireless accessories businesses, phase out of its
AVS small aperture earth station product line and divest itself of its SciComm
government electronics business.

The company currently fabricates telecommunication towers at its manufacturing
facility in Denton, TX. Due to space requirements at this facility and the
existing capacity available at third party steel fabricators, the company plans
to outsource tower production by the end of December 1999, while continuing
in-house engineering design and marketing of the tower product line.

The company also plans to relocate substantially all manufacturing activities
associated with its wireless accessories products from its Addison, IL plant to
facilities in Mexico and China, and expects to complete the relocation by
December 1999. In addition, the battery product line will be narrowed
considerably to focus on new battery chemistries.

The company previously developed and has successfully marketed a first
generation line of AVS small aperture earth station products. Competitors have
recently introduced new, more cost effective and better performing products,
superior to the company's first generation offering. Rather than redesign these
products, the company has invested in new technology whose product was
successfully demonstrated in December 1998 and which is currently in production
and being offered for sale. The restructuring plan includes withdrawal from the
marketplace of the first generation product and consequent write-down in related
inventory.

The company also plans to divest itself of its SciComm government electronics
business. SciComm has provided significant technology currently utilized in
several of the company's other businesses. With the recent completion of this
technology transfer and the continued consolidation of the defense intelligence
industry, it is no longer appropriate for the company to compete in this
marketplace. The company expects to complete the divestiture by December 1999.

In connection with the restructuring plans, approximately 600 employees and 280
temporary/contract workers will be terminated. Estimated employee termination
costs of $5.2 million have been accrued in March 1999. In addition to
termination costs, the restructuring reserve includes a goodwill write-off of
$14.1 million, long-term lease commitments of $3.5 million and inventory,
equipment and other asset write-downs of $13.9 million. Of the total $36.7
million employee termination and exit costs recognized in the quarter, $6.9
million is classified as Cost of Sales and $29.8 million as Restructuring in the
Operating Expense section of the income statement. On an after-tax basis,
restructuring charges were $28.1 million, or $0.34 per share.

The company expects that the plan will generate $6.9 million of cash flow, net
of income taxes, and that annual pre-tax cost reductions of $21 million will be
achieved upon completion of the restructuring actions.

Actual costs charged against the restructuring liability in the second quarter
were $22.0 million, including termination costs of $0.4 million paid to 228
terminated employees, a $14.1 million goodwill write-off, and inventory and
other asset write-downs of $7.5 million.


<PAGE>   9

ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS


RESULTS OF OPERATIONS

Sales for the quarter ended March 31, 1999 were $172 million, 13% lower than the
same period last fiscal year. The decline in sales was mainly due to lower
spending by most U.S. wireless infrastructure customers, industry-wide price
pressures and the last quarter of tough comparisons to prior year's Southeast
Asia business. Positive offsets to these items include wireless infrastructure
growth in Europe and Latin America, and Internet backbone build outs in the U.S.
Sales for the six months ended March 31, 1999 were $390.6 million, 9% lower than
the same period last fiscal year. In the wireless infrastructure market,
softness in the U.S. and Asia was partially offset by continued strength in
Europe and Latin America. Sales into the broadcast market increased over last
year led by higher shipments in the U.S., while sales of wireless accessories
decreased during the period, primarily in Europe.

Excluding the effect of the $6.9 million restructuring charge included in cost
of goods sold, gross margin as a percentage of sales was 30.3% in the second
quarter compared to 39.2% in the year ago period. For the first six months of
fiscal year 1999, gross margin as a percentage of sales was 33.7%, excluding the
effect of the restructuring charge, compared to 38.9% for the first six months
of fiscal year 1998. The decrease in gross margin rates was driven by
competitive market conditions and increased pricing pressure. On average, prices
for both the quarter and six months were 4% to 5% lower than comparable periods
last fiscal year. Product mix and lower sales volume also contributed to the
decrease in gross margin as a percentage of sales.

Excluding the effect of the $29.8 million restructuring charge taken in March,
1999, operating expenses in the second quarter, as a percentage of sales, were
23.3% compared to 20.9% for the same period last fiscal year. For the six months
ended March 31, 1999, excluding the $29.8 million restructuring charge,
operating expenses as a percentage of sales were 21.7% compared to 20.2% for the
same period last fiscal year. Research and development expenses increased 16% in
the quarter but remained slightly below year ago levels for the first six months
due partially to the sale of the company's fiber optic sensors business in 1998.
Sales and administrative expense for the second quarter and first six months of
fiscal year 1999 declined $2.1 million and $1.6 million respectively, primarily
due to lower payroll and related costs. As a percentage of sales, sales and
administrative expenses increased from $17.7% to 19.0% in the second quarter,
and from 17.1% to 18.3% for the first six months of the year.

Interest expense for both the quarter and six months ended March 31, 1999
remained relatively unchanged compared to the same period's last fiscal year.
Interest income for the second quarter was also comparable to last year at $1.8
million, while on a six month basis interest income increased $.9 million due to
interest received on advances to the company's Russian joint ventures. Other
expense increased for both the quarter and six months ended March 31, 1999,
primarily due to foreign exchange losses from the company's Brazilian
operations.

The company's effective tax rate for the three months and six months ended March
31, 1999 was (19%) and 75% respectively, compared to an effective tax rate of
34% for both periods in the prior fiscal year. The increase in the effective
rate was entirely attributable to the inclusion of non-deductible goodwill in
the restructuring charges recognized during the quarter.

LIQUIDITY

Cash and cash equivalents decreased $32.8 million during the first six months of
fiscal year 1999 to $45.6 million at March 31, 1999. Working capital totaled
$283.2 million compared to $320.1 million at September 30, 1998. Management
believes the current working capital level is adequate to meet the company's
normal operating needs. During the first half of fiscal 1999 the company
generated $47.2 million in cash from operations, principally from earnings of
$2.3 million and non-cash charges of $17.9 million for depreciation and
amortization and the $28.1 million after-tax restructuring charge. Accounts
receivable declined $14.1 million due to lower sales volumes, while inventories
increased both in anticipation of seasonally higher second half sales and due to
an increase in 


<PAGE>   10

safety stock levels as a new management information system was implemented in
the U.S. during the second quarter.

Net cash used in investing activities during the first six months of fiscal year
1999 was $33.2 million, including $27.3 million spent on capital additions. The
majority of the funds were used for equipment purchases and upgrades, completion
of the company's China facility and continued investments in upgrading its
business information systems. During the second quarter, the company acquired
Passive Power Products, Inc., a Maine-based supplier of RF products to the
broadcast markets, and completed the buyout of its joint venture in South Africa
by purchasing the remaining 20% stake.

Net cash used in financing activities totaled $47.4 million for the first six
months of the fiscal year. The company repurchased 2.7 million shares of stock
for $46.5 million. As of March 31, 1999, the company has repurchased 9.7 million
shares of the 15.0 million shares authorized for repurchase at a total cost of
$193.5 million. In the first quarter of fiscal 1999, the company's Brazilian
operation borrowed additional U.S. dollar funds.


YEAR 2000

The "Year 2000 issue" arose because many existing computer programs use only the
last two digits to refer to a year. Therefore, these computer programs do not
properly recognize a year that begins with "20" instead of "19". If not
corrected, many computer applications could fail or create erroneous results. In
1994, the company instituted a program to routinely review its computer hardware
and software to increase operational efficiency. As an output from this effort,
the company purchased a new business system in 1994 that would not only meet the
company's needs but was also Year 2000 compliant. The company completed
implementation of the system in all major locations in April 1999. Amounts
expended or to be expended on information technology systems exclusively to
ensure year 2000 compliance are not expected to be material to the company's
consolidated results of operations or financial position.

Management has also initiated a comprehensive program to prepare the company's
manufacturing and facility systems for the year 2000. The company is actively
engaged in testing and fixing applications such as security, environmental,
desktop computers and production equipment to ensure they are Year 2000 ready.
The company currently does not expect remediation costs to be material nor does
it expect any significant interruption to its operations because of Year 2000
problems. Most of the company's products do not have Year 2000 readiness issues
because they do not contain date-sensitive functions.

The company is in the process of contacting all third parties with which it has
significant relationships, to determine the extent to which the company could be
vulnerable to failure by any of them to obtain Year 2000 compliance. Some of the
company's major suppliers, customers and financial institutions have confirmed
that they anticipate being Year 2000 compliant on or before December 31, 1999,
although many have only indicated that they have Year 2000 readiness programs.
To date, the company is not aware of any significant third parties with a Year
2000 issue that could materially impact the company's operations, liquidity or
capital resources. However, the company has no means of ensuring that third
parties will be Year 2000 ready and the potential effect of third-party
non-compliance is currently not determinable.

The company has devoted and will continue to devote the resources necessary to
ensure that all Year 2000 issues are properly addressed. However, there can be
no assurance that all Year 2000 problems are detected. Further, there can be no
assurance that the company's assessment of its third party vendors and suppliers
will be accurate. Some of the potential worst-case scenarios that could occur
include: (1) corruption of data in the company's internal systems; (2) failure
of infrastructure services provided by government agencies; and (3) health,
environmental and safety issues relating to the company's facilities. If any of
these situations were to occur, the company's operations in certain areas could
be temporarily interrupted.

These interruptions could be more severe in countries outside the U.S. where the
company does a considerable amount of its business. The company intends to
develop Year 2000 contingency plans for continuing operations in the event such
problems arise. The company has operations around the world and is considering
shifting operations to different facilities if there are interruptions to
operations in particular countries or regions.

<PAGE>   11


RISK FACTORS

Safe Harbor for Forward-Looking Statements. We have made forward-looking
statements in this Form 10-Q under "Management's Discussion and Analysis of
Financial Condition and Results of Operations". In addition, other written or
oral statements which constitute forward-looking statements may be made by or on
behalf of the company. Although we have based these statements on the beliefs
and assumptions of our management and on information currently available to
them, they are subject to risks and uncertainties. We wish to ensure that such
statements are accompanied by meaningful cautionary statements, so as to obtain
the protections of the safe harbor established in the Private Securities
Litigation Reform Act of 1995. Accordingly, such statements are qualified by
reference to the discussion below of certain important factors that could cause
actual results to differ materially from those projected in such forward-looking
statements.

We caution the reader that the list of factors may not be exhaustive. We operate
in a continually changing business environment, and new risk factors emerge from
time to time. We cannot predict such risk factors, nor can we assess the impact,
if any, of such risk factors on our business or the extent to which any factors
may cause actual results to differ materially from those projected in any
forward-looking statements. Accordingly, you should not put undue reliance on
any forward looking statements. The company undertakes no obligation to update
publicly any forward-looking statements, whether as a result of new information,
future events or otherwise. While Andrew Corporation's management is optimistic
about the company's long-term prospects, the following risks and uncertainties,
among others, should be considered in evaluating its growth outlook.

Share Price Volatility. In the past years, the market price of our common stock
has been very volatile. We believe that the price has fluctuated in response to
such things as changes in growth rates of sales, net income and cash flow;
volatility in the U.S. stock market in general and in wireless equipment stocks
in particular; changes in analysts' estimates; and changes in general economic
conditions. We expect that the price of our common stock will fluctuate in the
future, perhaps substantially.

Fluctuations in Operating Results. Historically our quarterly and annual
revenues and operating results have fluctuated. We expect similar fluctuations
in the future. In addition to general economic and political conditions, the
following factors affect our revenues: timing of significant customer orders,
inability to forecast future revenue due to our just-in-time supply approach,
changes in competitive pricing, and wide variations in profitability by product
line. Since our quarterly and annual revenues and operating results vary, we
believe that period-to-period comparisons are not necessarily meaningful and you
should not rely on such comparisons as indicators of our future performance.

Intense Competition and Pricing Pressure. We believe that to be profitable in
the future we must respond effectively to increased competitive pressure. We
consider our principal competitive factors to include product quality and
performance, service and support, pricing and proprietary technology. Over the
past three years, in response to aggressive pricing practices by our
competitors, we have lowered prices for most of our products by 5 to 6% per
year. If we are unable to compete successfully, we may lose market share. We
expect that a significant loss in market share would have a material negative
effect on our business, financial condition and operating results.

Rapid Technological Change and Pressure to Develop New Products. We believe that
our future success depends on our ability to effectively anticipate and respond
to changes in technology, customer needs and industry standards. Failure to
anticipate changes, to adapt current products, to develop and introduce new
products on a timely basis, or to gain market acceptance for new products would
impair our competitiveness and could have a material negative impact on our
business and operating results.

International Risk. Nearly half of our sales are outside the United States and
in recent years we have significantly increased our international manufacturing
capabilities. We anticipate that international sales will continue to represent
a substantial portion of our revenues and that continued growth and
profitability will require further international expansion. International
business risks include currency fluctuations, tariffs and other trade barriers,
longer customer payment cycles, adverse taxes, restrictions on the repatriation
of earnings, compliance with local laws and regulations, political and economic
instability, and difficulties in managing and staffing operations. In
particular, the recent deterioration of certain economies, such as Brazil, is
expected to have a negative impact on 


<PAGE>   12

the financial results of our business in these regions during 1999. We believe
that international risk factors could materially impact our future sales,
financial condition and operating results.


Ability to Attract and Retain Qualified People. We believe that our future
success significantly depends on our ability to attract and retain highly
qualified personnel. We cannot be sure that we will be able to attract and
retain key personnel in the future. We believe our inability to do so could
negatively impact our business, financial condition and operating results.

Year 2000 Compliance. We are working toward bringing our business, manufacturing
and facilities systems into Year 2000 compliance. We also are contacting third
parties with whom we have significant relationships to determine our
vulnerability to their failure to achieve Year 2000 compliance. Our failure to
detect and address our own third-party Year 2000 problems could have a
significant negative impact on our business, financial condition and results of
operations.

Dependence on Intellectual Property Rights. Others could obtain or use our
intellectual property without our permission, develop equivalent or superior
technology, or claim that we have infringed on their intellectual property
rights. We rely on a combination of patent, copyright, trademark and trade
secret laws, and non-disclosure and non-competition agreements to protect our
rights. We are dependent on our intellectual property rights as a whole;
however, we do not believe that the loss of exclusivity with respect to any one
right would have a significant negative impact on our business, financial
condition or operating results.

Impact of Governmental Regulation. We are not directly regulated in the U.S.,
but most of our customers and the telecommunications industry generally are
subject to Federal Communications Commission regulation. We believe that
regulatory changes could have a significant negative effect on our business and
operating results by restricting our customers' development efforts, making
current products obsolete or increasing competition. Internationally, where many
of our customers are government owned and operated entities, we also are at risk
of changes in economic policy and communications regulation. In addition, our
joint ventures in Russia and Mexico require telecommunications licenses, which
may limit or otherwise affect the operations of the ventures.



<PAGE>   13


PART II--OTHER INFORMATION
Item 4.  Submission of Matters to a Vote of Security Holders

(a) Andrew's Annual Meeting of Stockholders was held on February 9, 1999

(b) (b) & (c) Items submitted to a vote

     1. Election of Directors


<TABLE>
<CAPTION>
1. Election of Directors       For               Against         Broker/Non-Votes       Abstentions
---------------------------------------------------------------------------------------------------
<S>                            <C>               <C>             <C>                    <C>      
John G. Bollinger              68,753,457        0               0                      7,041,452
Jon L. Boyes                   70,150,478        0               0                      5,644,431
Thomas A. Donahoe              71,187,234        0               0                      4,607,675
Kenneth J. Douglas             68,855,756        0               0                      6,939,153
Floyd L. English               68,833,312        0               0                      6,961,597
Jere D. Fluno                  68,816,318        0               0                      6,981,591
Dr. Glen O. Toney              71,153,487        0               0                      4,641,422
Ormand J. Wade                 68,885,576        0               0                      6,909,303

</TABLE>

2. The selection of Ernst & Young to serve as independent public auditors for
   fiscal year 1999. The selection of Ernst & Young as independent auditors was
   ratified by votes of 75,384,743 for, 211,800 against and 198,166 abstentions.


Item 6.  Exhibits and reports on Form 8-K

(a) EXHIBIT  INDEX

         Exhibit No.          Description
         -----------          -----------  

           27                 Financial Data Schedule March 31, 1999



(b)  Reports on Form 8-K

         No reports on Form 8-K were filed during the quarter ended March 31,
         1999.


<PAGE>   14


                                   SIGNATURES


Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.





Date May 11, 1999           /s/ F. L. English
        ---------           -----------------
                                F. L. English
                                Chairman, President and Chief Executive Officer




Date     May 11, 1999      /s/ C. R. Nicholas
    ------------------     ------------------
                               C. R. Nicholas
                               Executive Vice President and Chief Financial 
                                 Officer