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Development of Low-Profile Filtering Antennas With Dual-Mode Cavities
IEEE Open Journal of Antennas and Propagation Pub Date : 2020-04-17 , DOI: 10.1109/ojap.2020.2988569
Zhan Wang , Yuandan Dong

Two filtering antennas implemented on the dual-mode cavities are proposed, investigated and experimentally verified in this paper. They are developed based on the single-layer substrate integrated waveguide (SIW) technology. The rectangular SIW dual-mode cavities (using TE 102 , TE 201 and TE 301 modes) are effectively stimulated with a simple capacitive feeding near the diagonal line of the cavity. Surface current distribution is firstly analyzed for the optimal positions of slot radiators. Two rectangular slots are etched on the top surface of the SIW cavity, which are used to interfere the original current flow of one particular mode and generate radiation. These orthogonal dual-modes are used to obtain a filtering response. Their resonance frequencies are close to each other leading to field rotation and interaction with a radiation null generated outside the passband. The radiation and filtering function are achieved simultaneously by the dual-mode cavity, therefore only one cavity is required, resulting in a compact and simple antenna configuration. Good agreement has been observed between the simulation and measurement. They offer a variety of nice features, such as interesting working mechanism, low-profile, high radiation gain and good passband selectivity, which are also suitable for high-frequency antenna application.

中文翻译:

具有双模腔的薄型滤波天线的开发

本文提出,研究和实验验证了在双模腔上实现的两个滤波天线。它们是基于单层基板集成波导(SIW)技术开发的。矩形SIW双模腔(使用TE 102 ,TE 201和TE 301通过在腔体的对角线附近进行简单的电容式馈电可以有效地激励模式)。首先分析表面电流分布,以获取缝隙辐射器的最佳位置。在SIW腔的顶面上刻蚀了两个矩形槽,这些槽用于干扰一种特定模式下的原始电流并产生辐射。这些正交双模用于获得滤波响应。它们的共振频率彼此接近,从而导致磁场旋转以及与通带外产生的零辐射的相互作用。双模谐振腔同时实现了辐射和滤波功能,因此仅需要一个谐振腔,从而实现了紧凑而简单的天线配置。在仿真和测量之间已经观察到良好的一致性。
更新日期:2020-04-17
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