The Advanced Multiband Communication antenna System (AMCAS), developed for the U. S. air Force, is an extremely low-profile antenna that significantly reduces drag on an aircraft.
美国空军研发的先进多波段通信天线系统(amcas)是一种极低姿态天线，大大降低了飞机拖曳。
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For the indoor wireless communication system, a new dual-band antenna with U-shaped reflector is designed. By increasing the thickness of the air medium, the wider frequency band is achieved.