（i）dielectric antenna

center frequency 1575.42mhz±3 mhz

v.s.w.r 1.5:1

band width ±5 mhz

impedance 50 ohm

peak gain ＞3dbic based on 7×7cm ground plane

gain coverage ＞-4dbic at –90°＜0＜+90°(over 75% volume)

polarization rhcp

（ii）lna/filter

lna gain (without cable) 28db typical

noise figure 1.5db

filter out band attenuation (f0=1575.42 mhz)

7db min f0+/-20mhz ;

20db min f0+/-50mhz;

30db min f0+/-100mhz

v.s.w.r ＜2.0

dc voltage 2.7v，3.0v，3.3v，3.0v to 5.0v or other

dc current 10ma max

（iii）mechanical

weight ＜100gram

cable rg174 3meters or other

connector sma/smb/smc/bnc/fme/tnc/mcx/mmcx or other

mounting magnetic base

housing black

（iv）environmental

working temp -40℃~+85℃

storage temp. -45℃~+100℃

vibration sine sweep 1g(0-p)10~50~10hz each axis

humidity humidity95%~rh

weatherproof waterproof