A Miniaturized Dual-Band SIW Filtering Antenna with Improved Out-of-Band Suppression

Dehao Zhao, Feng Lin*, Houjun Sun, Xiu Yin Zhang

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

35 引用 (Scopus)

摘要

In this article, a dual-band substrate integrated waveguide (SIW) filtering antenna with improved out-of-band rejection is presented. It consists of two dual-mode rectangular cavity resonators integrated with the slot antenna. Four metal-insulator-metal (MIM) capacitors are designed in the first cavity to realize circuit miniaturization and wide upper stopband. The second slot-loaded cavity achieves a miniaturized dual-band radiation by cutting the currents of TE110 and TE210 modes. Three radiation nulls are obtained due to the multiple coupling paths between the resonating and spurious modes. The radiation nulls locations can also be adjusted by changing the feeding position. For verification, a SIW filtering antenna operating at 3.6/4.1 GHz (f1/f2) is designed and fabricated. The measured peak gain and 10 dB bandwidth at low band of 3.57 GHz (high band of 4.12 GHz) are 4.84 dBi (4.85 dBi) and 2.3% (1.6%), respectively. The measured >30 dB inner stopband suppression and 20 dB upper stopband suppression up to 1.46f2 are achieved.

源语言英语
页(从-至)126-134
页数9
期刊IEEE Transactions on Antennas and Propagation
70
1
DOI
出版状态已出版 - 1 1月 2022

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引用此

Zhao, D., Lin, F., Sun, H., & Zhang, X. Y. (2022). A Miniaturized Dual-Band SIW Filtering Antenna with Improved Out-of-Band Suppression. IEEE Transactions on Antennas and Propagation, 70(1), 126-134. https://doi.org/10.1109/TAP.2021.3098561