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.

Features and Benets

SPECTRUM MICROWAVE

Filtered

Low Noise Ampli er

CERTIFIED

Block Diagram

For GPS Applications

1227 MHz/1575 MHz

Typical Performance Specications

Frequency

. . . . . . . . . . . . . 1575.42 MHz (L1)

1227.60 MHz (L2)

Bandwidth

. . . . . . . . . . . . 30 MHz min.

Noise gure

. . . . . . . . . . . 2.0 dB max.

VSWR

. . . . . . . . . . . . . . . 1.5:1 max.

Gain

. . . . . . . . . . . . . . . . 45 dB +/-3.0 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

All specifications above measured at 25˚C

Dimensions and Connections

Chassis is machined aluminum with a nickel plate finish.

P/N: 310-025109-011

P/N: 310-025109-011

www.SpectrumMicrowave.com

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