移動通信常用的天線、直放站天線與室內(nèi)天線。 無論是GSM 還是CDMA, 板狀天線是用得最為普遍的一類極為重要的天線。這種天線的優(yōu)點是:增益高、扇形區(qū)方向圖好、后瓣小、垂直面方向圖俯角控制方便、密封性...
天線都有增益,有正有負,是與元天線作比較后計算出的結(jié)果。所謂元天線就是把天線理想化為一個沒有長度沒有寬度的點。2db的天線在2.4G和1.2G的頻率上來說是很小的。一般共線天線(通常所說的棒子天線或者...
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Reverse polarity SMA (RP-SMA or RSMA) is a variation of the SMA connector specification which reverses the gender of the interface. The female RP-SMA connector has the same external housing as a standard or conventional female SMA connector, which consists of an outer shell with the threads on the outside; however, the center receptacle is replaced by a male pin. Similarly, the RP-SMA male ha