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文中叙述一个供L波段接收机用的圆型微带贴片天线。通过在天线中插入变容二极管的方法,大大地提高了固有的频带窄的微带贴片天线的有用带宽。变容二极管是用微处理器控制的数字—模拟转换电路施加偏压的,该电路摸拟了接收机的微处理器。
This article describes a circular microstrip patch antenna for L-band receivers. By inserting a varactor in the antenna, the useful bandwidth of the inherent narrow band microstrip patch antenna is greatly increased. Varactor diodes are biased with microprocessor-controlled digital-to-analog conversion circuitry that mimics the receiver’s microprocessor.