Filtered
Low Noise Ampliꢀer
SPECTRUM MICROWAVE
P/N: 310-024105-021
For GPS Applications
1575 MHz
This series of Low Noise Amplifiers provides a filtered,
low-noise gain solution ideal for applications where higher
reliability is critical. These filtered low noise amplifiers are
designed to reduce out-of-band interference while achieving
high dynamic range.
P/N: 310-024105-021
Typical Performance Speciꢀcations
Frequency. . . . . . . . . . . . . 1575.42 MHz (L1)
Bandwidth . . . . . . . . . . . . 30 MHz min.
Noise ꢀgure . . . . . . . . . . . 2.5 dB max.
VSWR . . . . . . . . . . . . . . . 1.5:1 max.
A 3-pole ceramic filter selects only the desired GPS
positioning signal while the low-noise gain stage
maintains the receiving system’s sensitivity.
The LNA rejects undesired signals by at least 40 dB at
1050, 1410, and 1710 MHz. See the graphs on Page 2
for return loss, rejections, and gain of a typical unit.
Gain . . . . . . . . . . . . . . . . 26 dB +/-2.0 dB
Gain Flatness . . . . . . . . . . +/-0.5 dB
The preamplifier is powered by DC voltage applied to
the center conductor of the output connector. Optionally,
the unit can be powered through an external DC bias
connector.
Rejection . . . . . . . . . . . . . 40 dB @ 1050, 1410, 1710 MHz
Bias . . . . . . . . . . . . . . . . . Ext Bias, MR01
DC Power . . . . . . . . . . . . 5-16 VDC
Features and Beneꢀts
Temperature Range. . . . . . -40˚C to +71˚C
All specifications above measured at 25˚
Noise figure 1.6 dB typical
Filtered preamp filters
Dimensions and Connections
Lightweight aluminum housing
Single band (L1) performance
Antenna port J1
Coaxial and external bias options
Environmental sealing available
Application specific packages available
L5 configurations available upon request
Receiver port J2
External bias J3
SMA type female connectors
2.20"ø x 0.080"H excluding connectors
Optional Bias cable is available to simplify testing
and evaluation (P/N: A020-0560)
Block Diagram
Chassis is machined aluminum with a nickel plate finish.
Noise Figures
GPS Band
Freq (MHz)
NF (dB)
1565
1575
1585
1.60
1.60
1.60
L1
S-Parameters for this model are available on our website.
LNA parameters include noise data.
CERTIFIED
SPECTRUM MICROWAVE
•
38166 Old Stage Road
•
•
Delmar, Delaware 19940
Philadelphia, Pennsylvania 19154 • Phone: 215-464-4000 • Fax: 215-464-4001
•
Phone: 302-846-2750 • Fax: 302-846-3888
www.SpectrumMicrowave.com
SPECTRUM MICROWAVE • 2707 Black Lake Place
