A shielded QMSIW ultra-compact self-diplexing antenna for WiMAX/WLAN applications

Nrusingha Charan Pradhan, Karthikeyan Sholampettai Subramanian, Rusan Kumar Barik and Qingsha S. Cheng

Journal of Electromagnetic Waves and Applications, 2022, vol. 36, issue 13, 1869-1881

Abstract: In this contribution, novel design is presented for a very compact shielded quarter-mode substrate-integrated waveguide (S-QMSIW) based self-diplexing antenna (SDA) for WiMAX/WLAN applications. In order to achieve dual-band features, a slot is etched onto the top of the metal. Two orthogonal microstrip feed lines in the full-wave EM-simulator (HFSS) simulate the S-QMSIW resonator at two different frequencies (3.45 and 5.45 GHz). The proposed antenna pattern is extremely adaptable, allowing for simple frequency adjustments for each resonant frequency. A lumped circuit model is expected to be used to assess the antenna structure. A self-diplexing antenna based on S-QMSIW was designed, fabricated and tested to claim the proposed concept. At 3.45 and 5.45 GHz, the proposed antenna peak gains are 4.7 and 5.6 dBi, respectively. It offered port isolation better than 38 dB. The antenna front-to-back ratio was greater than 19.5 dB in each band. The proposed antenna circuit size was very compact ( $ 0.08\lambda _g^2 $ 0.08λg2).

Date: 2022
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DOI: 10.1080/09205071.2022.2046179

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