It's important that the azimuth of the antenna is tuned when troposcatter system working.
在散射系统开通时，天线的方位调整至关重要。
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The frequency response may also be controlled by a low voltage micro sized varicap, or a varactor diode, and instantiated as a tuned, resonant matching filter network residing with the antenna module.
In one exemplary embodiment, the multi-band antenna system 100 is tuned to operate within two general radio frequency ranges which are generally referred to as a low band and a high band.