The Trimble compatible is a low profile GPS active antenna system for the next generation multi-purpose GPS mobile antenna products for Telematics, Fleet Management, Navigations and AVL applications. This small print size of the antenna design does not reflect over-all performance, since the antenna itself needs no ground plane aid to deliver the L1 band small signal carrier that originates from the 24 orbiting USA satellites located thousands of miles over-head and with the ground reception power sensitivity at over -130dB. The Trimble compatible antenna is also design as a standard 3 Vdcpower input voltages with reverse polarity shutdown, over-current sense shutdown and an EMC power line suppression.
1. General- (1) 2 stages active LNA. (2) Dual dilters, (BPF(dielectric) & LPF(lump element). (3) RF protection(10watt), nano-second apark-gap. (4) Architecture design: dielectric patch antenna. (5) Low noise low drop-out, linear regulator. 2. Performance- (1) Receiving frequency: L1 band(1575.42MHz). (2) Output impedance: output impedance. (3) Polarization's: right hand circular (RHC). (4) Bandwidth: 10dB MHz @ -3dB point. (5) VSWR: 1.5 typical @ 1575MHz. (6) Elev. Angle coverage: 5~90 degree. (7) 5~90 degree: 360 degree. (8) 360 degree: dual (BPF <10 MHz B/W, LPF @1576 MHz Stop-band @ 1585MHz). (9) Over-all gain: 28dB (typical including 4dB cable loss & filters). (10) Over-all NF: <1.8dB @fo, 2dB max. (11) LNA characteristic: K=>1 Un-conditionally stable. 3. Electrical- (1) Power input: +3Vdc. (2) Power consumption: 25 ± 2mA. (3) Power input: reverse polarity short circuit shutdown. (4) Over-current: thermal over-current shutdown >+150degreeC. 4. Physical- (1) Dimensions: 21 x 21 x 7mm +/-0.5mm. (2) Coax connector/cable: hirose H.F.L. 5. Environmental- (1) Operating emperature: -30 to + 85 degree C . (2) Storage: -40 to + 90 degree C.