标签: 介電

GPS微波介電材料與GPS天線設計概念GPSGPSGPSGPSGPSGPS(GlobalPositionSystem)Q(DielectricQualityFactor)(Antenna)(DielectricConstant)GPS1995427GPSGPSGPSGPSGPS243271015GPS1575.42MHzL1L2εr1227.60MHz1575.42MHz(Polarization)10214http://www.materialsnet.com.tw(a)(εr)Q=Q=1/fα1/εr(b)/Q(c)=f0=εr/2+(d)(a)(b)(d)(c)EGPSGPS25mm×25mm19mm×19mm13mm×13mmQQQQ=2π2πWoPT=ωoWo/PWo=P=15-2535-4080-100QGPS10-100ωo=T=GPS2π/ωoGPSaf1f2fcQbQQ10,000http://www.materialsnet.com.tw14103(1)Factor),Qc(ConductorQualityQc=ω0W0PcPc1=Pc+Pd+PrQoωoWωoWωoW=1+1+1QcQdQrQQ(2)Factor),Qd(DielectricQualityτftanδ=σωε0εrf/f=τfTf=T=Qd=ωoWPωε0∫E2Dvωε0==σσ∫E2dV=1tan……