Filtered Low Noise Amplifier SPECTRUM MICROWAVE P/N: 310-024105-021 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. Features and Benefits 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 Block Diagram P/N: 310-024105-021 Typical Performance Specifications Frequency. . . . . . . . . . . . . 1575.42 MHz (L1) Bandwidth . . . . . . . . . . . . 30 MHz min. Noise figure . . . . . . . . . . . 2.5 dB max. VSWR . . . . . . . . . . . . . . . 1.5:1 max. Gain . . . . . . . . . . . . . . . . 26 dB +/-2.0 dB Gain Flatness . . . . . . . . . . +/-0.5 dB Rejection . . . . . . . . . . . . . 40 dB @ 1050, 1410, 1710 MHz Bias . . . . . . . . . . . . . . . . . Ext Bias, MR01 DC Power . . . . . . . . . . . . 5-16 VDC Temperature Range. . . . . . -40˚C to +71˚C 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. Noise Figures GPS Band L1 Freq (MHz) 1565 1575 1585 NF (dB) 1.60 1.60 1.60 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 Filtered Low Noise Amplifier 1575 MHz Amplifier Gain Return Loss 40 0 DB(|S[1,1]|)* 20 Loss in dB Gain in dB 30 10 0 -10 -20 -10 DB(|S[2,2]|) DB(|S[2,1]|)* -20 1400 1500 1600 1700 -30 1051 1750 1251 Frequency (MHz) Dimensions 1451 1651 1751 Frequency (MHz) (inches) 1.00 4X ø .17 thru ø2.72 2X SMA Female Connector 1.79 .51 J1 1.79 J2 J2 2.15 J1 1.36 J3 J3 MR01 Series Connector 2.20 .51 .23 .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