基于矩形槽切换的宽带平面方向图可重构天线

Broadband pattern reconfigurable planar antenna based on switchable rectangular slots

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。

The bandwidth of pattern reconfigurable planar antennas is improved by introducing a rectangular slot in the active clement. A switch controlled rectangular slot is used in the active element using designs from the stagger tuning method. The antenna can be controlled to work in two adjacent frequency bands to broaden the total bandwidth of the planar antenna. The resonant characteristics of this antenna illustrate the bandwidth improvement by introducing switch controlled rectangular slots for the design of a pattern reconfigurable antenna. Tests show that the working frequency ranges from 2.21 GHz to 2.49 GHz and the relative bandwidth is about 11.6% with the return loss less than - 10 dB. The antenna has more bandwidth than antennas using the stagger tuning method due to pattern reconfiguration.