Filtered
Low Noise Ampliꢀer
SPECTRUM MICROWAVE
P/N: 310-025109-012
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.
P/N: 310-025109-012
Typical Performance Speciꢀcations
Frequency. . . . . . . . . . . . . 1575.42 MHz (L1)
1227.60 MHz (L2)
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.
Bandwidth . . . . . . . . . . . . 30 MHz min.
Noise ꢀgure . . . . . . . . . . . 2.5 dB max.
VSWR . . . . . . . . . . . . . . . 1.5:1 max.
Gain . . . . . . . . . . . . . . . . 45 dB +/-3.0 dB
Gain Flatness . . . . . . . . . . +/-0.5 dB
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.
Rejection . . . . . . . . . . . . . 40 dB @ 1050, 1410, 1710 MHz
Bias . . . . . . . . . . . . . . . . . Coaxial Bias
DC Power . . . . . . . . . . . . 16-32 VDC
Features and Beneꢀts
Temperature Range. . . . . . -40˚C to +71˚C
All specifications above measured at 25˚C
Noise figure 1.6 dB typical
Double-diplexed preamp filters
Lightweight aluminum housing
Dual band (L1 and L2) performance
Dimensions and Connections
Coaxial and external bias options
Environmental sealing available
Application specific packages available
Suitable for new L2-C signals
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.
L5 configurations available upon request
Block Diagram
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
SPECTRUM [ SPECTRUM MICROWAVE, INC. ]
