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针对阵列天线频带窄的缺点,在参差调谐法的基础上,通过在有源单元上引入开关可控矩形槽的方法,使天线工作在两个相邻的频带,从而达到天线总体带宽的展宽。根据该类型天线单元的谐振特性,研究了开关可控矩形槽展宽频带的原理,并设计了引入矩形槽的平面方向图可重构天线。实验结果表明:该天线可以工作在频率范围为2.21～2.49GHz的频段上,-10dB下的相对带宽约为11.6%,比采用参差调谐法进一步展宽了天线带宽,实现了天线方向图的可重构。
Aiming at the shortcoming of the narrower frequency band of the array antenna, on the basis of the staggered tuning method, the antenna is operated in two adjacent frequency bands by introducing a switchable rectangular slot on the active cell to achieve the broadening of the overall antenna bandwidth. According to the resonance characteristics of the antenna elements of this type, the principle of switching the controllable rectangular slot to broaden the frequency band is studied, and the planar directional pattern reconfigurable antenna introduced into the rectangular slot is designed. The experimental results show that the antenna can work in the frequency range from 2.21 to 2.49GHz, and the relative bandwidth at -10dB is about 11.6%, which further broadens the bandwidth of the antenna compared with the staggered tuning method, which realizes the weighting of the antenna pattern Structure.