A Simple Cylindrical Dielectric Resonator Antenna Based on High-Order Mode With Stable High Gain
Qihua Wu, Hongji Li, Sai‐Wai Wong, Zhonghe Zhang, Yejun He
Abstract
A stable high gain cylindrical dielectric resonator antenna (CDRA) based on high-order mode HEM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11δ+2</sub> is proposed. This design simplifies the complexity of the structure, combined with wideband feeding method, and exhibits a significant high gain performance over the operating band at the center frequency of 8 GHz. First, the high-order mode of CDRA is successfully excited through a wideband technique, achieving a 11.6% impedance bandwidth and a flat high gain of around 12.4 dBi. Then, a DRA array consisting of four elements is designed, with an impedance bandwidth of 13.7% and a stable realized gain as high as 17.8 dBi that is much higher than the gain of traditional DRA arrays