Filtered
Low Noise Ampli er
SPECTRUM MICROWAVE
P/N: 310-024105-011
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.
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.
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: 310-024105-011
Typical Performance Speci cations
Frequency.
. . . . . . . . . . . . 1575.42 MHz (L1)
Bandwidth
. . . . . . . . . . . . 30 MHz min.
Noise gure
. . . . . . . . . . . 2.0 dB max.
VSWR
. . . . . . . . . . . . . . . 1.5:1 max.
Gain
. . . . . . . . . . . . . . . . 26 dB +/-0.5 dB
Gain Flatness
. . . . . . . . . . +/-0.5 dB
Rejection
. . . . . . . . . . . . . 40 dB @ 1050, 1410, 1710 MHz
Bias
. . . . . . . . . . . . . . . . . Coaxial Bias
DC Power
. . . . . . . . . . . . 5-16 VDC
Temperature Range
. . . . . .
-40˚C
to
+71˚C
Features and Bene ts
Noise figure 1.6 dB typical
Filtered preamp filters
Lightweight aluminum housing
Single band (L1) performance
Coaxial and external bias options
Environmental sealing available
Application specific packages available
L5 configurations available upon request
All specifications above measured at
25˚
Dimensions and Connections
Antenna port J1
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)
Chassis is machined aluminum with a nickel plate finish.
Block Diagram
Noise Figures
GPS Band
Freq (MHz)
1565
1575
1585
NF (dB)
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 • 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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