Filtered
Low Noise Ampli er
SPECTRUM MICROWAVE
P/N: 310-025103-012
For GPS Applications
1227 MHz/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.
A pair of diplexed 3-pole ceramic filters select only the
desired GPS signals 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.
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.
P/N: 310-025103-012
Typical Performance Speci cations
Frequency.
. . . . . . . . . . . . 1575.42 MHz (L1)
1227.60 MHz (L2)
Bandwidth
. . . . . . . . . . . . 30 MHz min.
Noise gure
. . . . . . . . . . . 2.5 dB max.
VSWR
. . . . . . . . . . . . . . . 1.5:1 max.
Gain
. . . . . . . . . . . . . . . . 14 dB min.
Gain Flatness
. . . . . . . . . . +/-0.5 dB
Rejection
. . . . . . . . . . . . . 40 dB @ 1050, 1410, 1710 MHz
Bias
. . . . . . . . . . . . . . . . . Coaxial Bias
DC Power
. . . . . . . . . . . . 16-32 VDC
Temperature Range
. . . . . .
-40˚C
to
+71˚C
All specifications above measured at
25˚C
Features and Bene ts
Noise figure 1.6 dB typical
Double-diplexed preamp filters
Lightweight aluminum housing
Dual band (L1 and L2) performance
Coaxial and external bias options
Environmental sealing available
Application specific packages available
Suitable for new L2-C signals
L5 configurations available upon request
Dimensions and Connections
Antenna port J1
Receiver port J2
SMA type female connectors
2.20"ø x 0.080"H excluding connectors
Chassis is machined aluminum with a nickel plate finish.
Block Diagram
CERTIFIED
SPECTRUM MICROWAVE
• 38166 Old Stage Road • Delmar, Delaware 19940 • Phone: 302-846-2750 • Fax: 302-846-3888
SPECTRUM MICROWAVE
• 2707 Black Lake Place • Philadelphia, Pennsylvania 19154 • Phone: 215-464-4000 • Fax: 215-464-4001
www.SpectrumMicrowave.com
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