RF POWER AMPLIFIER■ All Solid-State Amplifier■ 2 SSAs Contained in One System Rack
■ Frequency Range:3900MHz±1.5MHz■ Output Power:900W(min.) @1dB Comp. per SSA■ CW, 100％ DUTY CAPABILITY■ VERY HIGH RELIABILITY

R&K-CA3900BW3-5560R-SL

SPECIFICATIONS ＠＋25℃
Frequency Range: 3900MHz±1.5MHz
Small Signal Gain
: ＋55dB (min.)Output Power
SSA-1 : 900W (min.) @1dB Comp.
SSA-2 : 900W (min.) @1dB Comp.
Operation Mode
: Class-AB
Delay: 300ns (max.)
Phase Flatness: 10deg (max.) @Po=90W〜900W
Harmonics: －30.0dBc (max.) @Po=900W
Spurious: －70.0dBc (max.) @Po=900W
Cross Talk
: －75.0dBc (max.) @3.9GHz±100kHz
Efficiency: 25% (min.) @Po=900W @2SSAs
Impedance: 50Ω
Maximum RF Input Power : ＋5.0dBm
AC Supply Input: AC480V±5％／3φ, 4wire, 60Hz
AC120V±5%／1φ, 2wire, 60Hz
Consumption Power: 9kVA (max.)Connectors: RF‐IN
N‐FEMALE
RF‐OUT WR284
Size: (W)761mm×(D)1269mm×(H)1688.5mm(Excluding Projection)
Weight: 635kg (max.)
Cooling: Water Cooling
Water Input Pressure: 40-75psi(nominal), 150psi(max.)
Water Temperature: ＋30℃±0.5℃
Water Flow Rate
: 4gpm (min.)Protection Circuits: Over Temperature Protection
Power Supply Voltage Protection
Output Over Power Protection
Other Function: With Output Circulator (each final device)

FEATURES

1) DOUBLE SHIELDED RACK CONSTRUCTION

Internal heat is water-cooled and discharged outside by self-contained heat exchanger.
Double-layer housing provides high RF/EMI shielding performance.

2) WILKINSON RADIAL COMBINER

Single-stage power combining of output transistors protected by each respective ferrite
circulator provides high reliability in long-term operation.

3) BROADCAST-TRANSMITTER-LEVEL REDUNDANCYHigh redundancy design of RF transistors and power supplies provides fault-tolerant andsustainable system operation.

4) PASSIVE ANALOG PRE-DISTORTION

Very ideal AB-class linear power amplifier is realized by passive analog predistortion circuitdespite poor linearity of GaN transistor.

5) MULTIPLE CPU CONTROLLER AND SENSORS

Multiple CPUs monitor a total of 123 points and save the status data to an internal SD memory
card by use of Modbus protocol and through Ethernet.

6) ADVANCED ANALOG RF POWER TECHNOLOGY

Short-term (1sec) phase stability in free-running operation is within 0.1deg and RF voltage
level stability is 0.1%.

R&K reserves the right to make changes in the specifications of or discontinue products at any time
without notice. R&K products shall not be used for or in connection with equipment that requires anextremely high level of reliability and safety such as aerospace uses or medical life support equipment.
Further, the export of R&K products from Japan may be subject to an export license by the governmentof Japan, based on Japan's "Foreign Exchange and Foreign Trade Law".

－1－RF POWER AMPLIFIERTYPICAL PERFORMANCE (Temp @+25℃)

R&K-CA3900BW3-5560R-SL

Gain Flatness

605958Gain (dB)

57
5655545352513880

6038903900

Frequency (MHz)Gain @3900MHz / 90W to 900W drive

0.00853910

3920

Short-Term Amplitude Stability
per each Packet during 1sec.

59
0.008

Amplitude (%)

58

Gain (dB)

57
56
55
54
53

0.00750.007
0.006552
51-4.0 -2.6 -1.2 0.2

1.6

3.0

4.4

Input Power (dBm)

5.8

7.2

Phase @3900MHz / 90W to 900W drive

-85

0.018

-900.017-100

Phase (deg.)

Phase (deg.)-95-105-110-115-12001012345678345678Time (hour)
Short-Term Phase Stability
per each Packet during 1sec.

0.016
0.015
0.014
0.013
0.012

-125

0.011

-130
-4.0 -2.6 -1.2 0.2

1.6

3.0

4.4

Input Power (dBm)

5.8

7.2

R&K reserves the right to make changes in the specifications of or discontinue products at any time
without notice. R&K products shall not be used for or in connection with equipment that requires anextremely high level of reliability and safety such as aerospace uses or medical life support equipment.
Further, the export of R&K products from Japan may be subject to an export license by the governmentof Japan, based on Japan's "Foreign Exchange and Foreign Trade Law".

－2－2Time (hour)RF POWER AMPLIFIERTYPICAL PERFORMANCE (Temp @+25℃)
R&K-CA3900BW3-5560R-SL

Harmonics

Spurious

Output Power Linearity & Efficiency

6270

61
60

60

50

Output Power (dBm)

58
57

40

56
55

30

54
53

2052
51

Frequency:3900MHz50
49-610

Output Power
Efficiency-5-4-3-2-1-012Input Power (dBm)

R&K reserves the right to make changes in the specifications of or discontinue products at any time
without notice. R&K products shall not be used for or in connection with equipment that requires anextremely high level of reliability and safety such as aerospace uses or medical life support equipment.
Further, the export of R&K products from Japan may be subject to an export license by the governmentof Japan, based on Japan's "Foreign Exchange and Foreign Trade Law".

－3－34567

AC to RF Efficiency (%)

59

RF POWER AMPLIFIERTYPICAL PERFORMANCE (Temp @+25℃)
R&K-CA3900BW3-5560R-SL

RF Stability Output Power(W) vs Time(minute)1000900

Output Power (W)

800
700
600
500
400
300200100

Frequency:3900MHz

04080

OUTLINE DRAWING

120160200

240

280

Time (minute)320360400440480※IN MILLIMETERSFRONT VIEW

SIDE VIEW

761

1269

1688.5POWER

R&K reserves the right to make changes in the specifications of or discontinue products at any time
without notice. R&K products shall not be used for or in connection with equipment that requires anextremely high level of reliability and safety such as aerospace uses or medical life support equipment.
Further, the export of R&K products from Japan may be subject to an export license by the governmentof Japan, based on Japan's "Foreign Exchange and Foreign Trade Law".

－4－

REAR VIEW