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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >Dual-band beam scanning filtering antenna using dual-eighth mode substrate integrated waveguide-based metamaterial structure
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Dual-band beam scanning filtering antenna using dual-eighth mode substrate integrated waveguide-based metamaterial structure

机译：使用双八模式基片集成波导基超材料结构的双带束扫描滤波天线

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摘要

In this article, a dual-band beam scanning antenna with filtering capability is proposed by using novel dual-eighth mode substrate integrated waveguide-based dual-band metamaterial (DB-MTM) structure. The novel DB-MTM structure consists of two interconnected modified eighth mode substrate integrated waveguide (EMSIW) structures, which is designed by etching four interdigital fingers on the upper ground, and has two balanced composite right/left-handed (CRLH) passbands. Taking advantage of the continuous phase constant changing from negative to positive values within the two CRLH passbands of the DB-MTM structure, a beam scanning antenna, which is composed of 11 dB-MTM unit cells, is designed to achieve continuous beam scanning from backward to forward directions within dual operating frequency bands. For verification, the proposed dual-band antenna is fabricated and measured. According to the measurements, the fabricated antenna can scan its main beam from -72 degrees to +57 degrees and -70 degrees to +38 degrees over the two operating frequency bands of 3.40-4.95 GHz and 5.85-6.80 GHz, respectively; and exhibits very sharp transitions at the band edges over the two operating frequency bands. Besides, the measured peak gains in the two operating bands are 14.0 dB at 4.5 GHz and 14.5 dB at 6.4 GHz. Moreover, the measurements show good agreement with the simulations, proving the validity of the design method, and further expanding the applications of EMSIW.
机译：在本文中，提出了一种具有滤波功能的双频波束扫描天线，它采用了新颖的双八模式基片集成波导基双频超材料（DB-MTM）结构。新颖的DB-MTM结构由两个互连的修改的第八模式衬底集成波导（EMSIW）结构组成，该结构是通过在较高的地面上蚀刻四个叉指而设计的，并具有两个平衡的左右手复合通带（CRLH）。利用DB-MTM结构的两个CRLH通带内连续相位常数从负值变为正值的优点，设计了由11 dB-MTM单位单元组成的波束扫描天线，以实现从后向连续波束扫描在双工作频段内转发方向。为了进行验证，制造并测量了所提出的双频天线。根据测量，制造的天线可以在3.40-4.95 GHz和5.85-6.80 GHz的两个工作频带上分别从-72度至+57度和-70度至+38度扫描主波束；并且在两个工作频带的频带边缘处表现出非常尖锐的过渡。此外，在两个工作频带中测得的峰值增益在4.5 GHz时为14.0 dB，在6.4 GHz时为14.5 dB。此外，测量结果与仿真结果吻合良好，证明了设计方法的有效性，并进一步扩大了EMSIW的应用范围。

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