Filtered Low Noise Ampli er
SPECTRUM MICROWAVE
P/N: 310-025107-012
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: 310-025107-012
Typical Performance Speci cations
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 . . . . . . . . . . . . . . . . 34 dB +/-2.0 dB 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 por t J1 Receiver por t 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
Filtered Low Noise Ampli er
1227 MHz/1575 MHz
Ampli er Gain
35
Return Loss
0
DB(|S[1,1]|)
Gain in dB
-5
DB(|S[2,1]|)
Loss in dB
15
-10
-20
DB(|S[2,2]|)
-25 1051
1251
1451 Frequency (MHz)
1651
1751
-30 1051
1251
1451 Frequency (MHz)
1651
1751
Dimensions
(inches)
1.00 ø2.72 4X ø .17 thru
2X SMA Female Connector 1.79 .51 2.15 J1 J2
1.36
.51 2.20
.80
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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