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A Waveguide Slot Filtering Antenna With an Embedded Metamaterial Structure

Wang, Wei, Zheng, Zhi, Fang, Xiaochuan, Zhang, Hongtao, Jin, Mouping, Lu, Jiaguo, Luo, Qi, Gao, Steven (2019) A Waveguide Slot Filtering Antenna With an Embedded Metamaterial Structure. IEEE Transactions on Antennas and Propagation, 67 (5). pp. 2953-2960. ISSN 0018-926X. (doi:10.1109/TAP.2019.2898989) (KAR id:74348)

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A novel waveguide slot filtering antenna with an embedded metamaterial is presented. This filtering antenna consists of a common waveguide slot antenna with longitudinal slots cut on the top broad wall of its rectangular waveguide and a metamaterial surface embedded in the bottom broad wall. The metasurface replaces the conventional metal plane in the form of a bed of nails. In the operating frequency band, the metasurface works as a perfect electric conductor, so the antenna radiates as the traditional waveguide slot antennas. While in the stopband, the metasurface performs as a perfect magnetic conductor to suppress the propagation of electromagnetic wave in the waveguide cavity, so the interference signal is rejected and a filter function is achieved. To show the design process and verify its feasibility, a filtering antenna prototype working in the C-band and having a stopband in the X-band is designed, fabricated, and tested. A good agreement between simulation and measurement is obtained, demonstrating efficient radiations in the working band and a strong suppression of more than 35 dB in the stopband.

Item Type: Article
DOI/Identification number: 10.1109/TAP.2019.2898989
Uncontrolled keywords: antenna radiation patterns; metamaterial antennas; rectangular waveguides; slot antennas;perfect magnetic conductor; waveguide cavity; filter function; filtering antenna prototype; waveguide slot filtering antenna; embedded metamaterial structure; common waveguide slot antenna; longitudinal slots; rectangular waveguide; metamaterial surface; perfect electric conductor; waveguide slot filtering; Filtering; Slot antennas; Nails; Microwave filters; Bandwidth; Metamaterials; Filtering antenna; metamaterial; waveguide slot antenna
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Steven Gao
Date Deposited: 11 Jun 2019 14:27 UTC
Last Modified: 16 Feb 2021 14:05 UTC
Resource URI: (The current URI for this page, for reference purposes)
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