LA20FPDCLine Amplifier 20dB Gain L1/L2 Filtered Technical Product DataFeatures••••••

Amplifier Gain: 20dB typicalPasses L1/L2 GPS, Galileo & BEIDOUHigh Rejection outside L1 and L2Excellent Passband Rippleo L1/L2 Ripple <2.0dB
Very Low Noise Figure
o 1.4 dB NF typical at GPS L1.
High 1 dB compression point and 3rd orderintercept point.

Description
This Line Amplifier 20dB Filtered Pass DC (LA20FPDC) is an active one input, one output amplifier
optimized for GPS applications. This equipment accepts signals covering all major GNSS constellations
with excellent gain flatness and a very low noise figure. In the standard configuration, the J1 port
accepts DC voltage from a connected GPS receiver. This voltage is regulated and used to power theinternal amplifiers while unregulated voltage is passed through the antenna port to power a connected
active antenna or other upstream devices.
The frequency response covers both GPS L1 & L2 bands in addition to passing GNSS frequencies.
There is greater than 20dB rejection minimum +/- 100MHz relative to the passband. In the standardconfiguration, the RF output (J1) passes DC from the connected GPS receiver through the amplifier tothe antenna, allowing the GPS receiver to power both the antenna and the amplifier. Custom gain
between 3-25dB may be ordered as well. Please contact GPS Networking Technical Support for
any questions regarding the standard or special configurations at salestech@gpsnetworking.com or1-800-463-3063.

Use Cases• As an in-line amplifier to negate the insertion loss of a long cable run.
• To add amplification to a signal provided by a passive antenna.
• As an amplifier in a re-radiating system.
• In combination with one of our splitter devices to create a GPS distribution network.

Rev AFor sales or technical support contact us at 1-800-463-3063 or salestech@gpsnetworking.com

1

LA20FPDCElectrical Specifications, TA=25C
Parameter

Notes

Min

L1 Frequency Range

Covers GPS, GALILEO, BeiDou, and QZSS L1 GNSS constellations.

L2 Frequency Range

Covers all major L2 GNSS constellations.

Characteristic
Impedance

Unused ports should be terminated with 50Ω loads.

Gain

The relative increase in signal power provided by the amplifier.
S21 at the L1 & L2 center frequencies.

Input SWR

TypMax

Unit

1.541

1.596

GHz

1.200

1.252

GHzΩ5021dB

Input Standing Wave Ratio: S11

2.0:1

-

Output SWR

Output Standing Wave Ratio: S22

2.0:1

-

L1 Bandwidth

The 3dB bandwidth of the filter for the L1 band.

L1 Rejection

Rejection at L1 ± 100 MHz

L2 Bandwidth

The 3dB bandwidth of the filter for the L1 band.

L2 Rejection

Rejection at L2 ± 100 MHz

RipplePassband Amplitude Ripple at L1 & L2 ± 10 MHz

Reverse Isolation

Attenuation applied signals traveling backwards through the amplifier: S12.

Input P1dB

The 1dB compression point.

Req. DC Input V.

Operating Voltage Range.

Current Draw

Typical current consumption.

192055
2027

MHz>40

52
25

dB
MHz

30>40

dB

1.25

2.0

dB-50

dB
L1: -24
L2: -29

3.3
26dBm
15

VDC

30mA

External Power Options (Networked Option)
Voltage Input
110VAC
220VAC240VAC (United Kingdom)
Customer Supplied DC 9-32 VDC

Style
Transformer (ITA Type A Wall Mount)
Transformer (ITA Type C Wall Mount)Source Voltage Options
Transformer (ITA Type G Wall Mount)
MIL-DTL-5015 10SL Two-Pin DC Connector(Includes Mate)DC Voltage Out
Max Current out For Corresponding Vout
3.3 V
110mA
5V
130mA
9V
140mA
Output Voltage Options (2)
12V
180mA
15V
220mA
CustomCustomStandard DC Configuration without External Power Option
All Ports Pass DC
Standard DC Configuration with any External Power Option (AC/DC or Military DC) (1)J1 Port DC Blocked with 200Ω load standard
Antenna Port is DC PassConnector Options

Connector Style
Type N-female

ChargeNo Charge

Type SMA-female

No Charge

Type TNC-female

No Charge

Type BNC-femaleNo Charge

OtherContact GPS Networking(1): With Network Option, any RF port (input or output) can be specified to Pass DC or Block DC
Rev A

For sales or technical support contact us at 1-800-463-3063 or salestech@gpsnetworking.com

2

LA20FPDCPart Number Configuration

Rev A

For sales or technical support contact us at 1-800-463-3063 or salestech@gpsnetworking.com

3LA20FPDC
Performance
LA20FPDC (Standard Gain)
Each LA20FPDC ships with a test sheet that verifies critical performance characteristics, such as
gain, input VSWR, and amplitude balance; a typical VNA test sheet is shown below. Noise figure test
data is available upon request.

Rev A

For sales or technical support contact us at 1-800-463-3063 or salestech@gpsnetworking.com

4MechanicalContact us at salestech@gpsnetworking.com for 3D models or CAD drawings.