Spring Antenna Frequency 470-510mhz - amandaantetec ( China ) - Offers to Sell and Export - Tuesday 29 December 2015 5:17 am - spring antenna frequency 470 510mhz application ism networks frequency range 470 510mhz gain 2 dbi vswr amp lt 2 1 impedance 50ohm max input power 2w polarization linear hpbw ...