volume | PIER Journals

Abstract

A novel filtering crossover featuring flexibly allocated center frequencies based on ridged substrate integrated waveguide (RSIW) is proposed. Two TE₁₀₁-mode SIW cavities, two loading single ridge SIW (SRSIW) cavities and a loading triple ridge SIW (TRSIW) cavity are used to realize the filtering crossover. Good transmission and isolation responses can be achieved based on orthogonal degenerate TE₁₀₂ and TE₂₀₁ modes in the centered TRSIW cavity. The frequency ratio of the TE₁₀₂ and TE₂₀₁ modes can be significantly improved by adjusting the aspect ratio and the dimensions of ridges in the centered TRSIW cavity. A prototype operating at 4.98 GHz/10.1 GHz is fabricated and measured. The measured results demonstrate excellent agreement with the simulated one.

1. Liu, Qing, Hang Qian, De-Wei Zhang, Ke Gong, and Qi-Kun Liu, "Compact highly-selective bandpass filter based on triple-mode ridge substrate integrated waveguide cavity," IEEE Microwave and Wireless Technology Letters, Vol. 33, No. 9, 1274-1277, 2023. Google Scholar

2. Zheng, Yan, Hanyu Tian, and Yuandan Dong, "Miniaturized, wide stopband filter based on shielded capacitively loaded SIW resonators," Chinese Journal of Electronics, Vol. 33, No. 2, 456-462, 2024. Google Scholar

3. Zhou, Kang, Chun-Xia Zhou, and Wen Wu, "Substrate-integrated waveguide dual-band filters with closely spaced passbands and flexibly allocated bandwidths," IEEE Transactions on Components, Packaging and Manufacturing Technology, Vol. 8, No. 3, 465-472, 2018. Google Scholar

4. Han, Si-Qi, Kang Zhou, Jin-Dong Zhang, Chun-Xia Zhou, and Wen Wu, "Novel substrate integrated waveguide filtering crossover using orthogonal degenerate modes," IEEE Microwave and Wireless Components Letters, Vol. 27, No. 9, 803-805, 2017. Google Scholar

5. Zhou, Yali, Kang Zhou, Jindong Zhang, Chunxia Zhou, and Wen Wu, "Miniaturized substrate integrated waveguide filtering crossover," 2017 IEEE Electrical Design of Advanced Packaging and Systems Symposium (EDAPS), 1-3, Haining, China, Dec. 2017.

6. Zhang, Gang, Xin Zhou, Kai-Da Xu, Jiquan Yang, Xiaohang Sun, Bin Xu, Kam-Weng Tam, Shuai Feng, Wanchun Tang, and Jiasheng Hong, "Design of wide-stopband and dual-band filtering crossovers based on mixed substrate integrated waveguide cavities," IEEE Transactions on Microwave Theory and Techniques, Vol. 71, No. 12, 5346-5357, 2023. Google Scholar

7. Zhan, Wan-Li, Jin-Xu Xu, Xiao-Lan Zhao, Bin-Jie Hu, and Xiu Yin Zhang, "Substrate integrated waveguide multi-channel filtering crossover with extended channel number and controllable frequencies," IEEE Transactions on Circuits and Systems II: Express Briefs, Vol. 67, No. 12, 2858-2862, 2020. Google Scholar

8. Qu, Lili, Yonghong Zhang, Jiawei Liu, Xiaole Bo, Huaishu Jing, and Yong Fan, "Design of filtering crossover and diplexer on SIW quadruple-mode resonators in a single cavity," IEEE Access, Vol. 8, 176789-176796, 2020. Google Scholar

9. Zhou, Kang and Ke Wu, "Wide-stopband substrate-integrated waveguide filtering crossovers with flexibly allocated channel frequencies and bandwidths," IEEE Transactions on Microwave Theory and Techniques, Vol. 69, No. 7, 3264-3274, 2021. Google Scholar

10. Hu, Chengkun, Yujian Li, and Junhong Wang, "A large-frequency-ratio multichannel bandpass filter based on structure-shared mode-composite air-filled cavity resonators," IEEE Transactions on Microwave Theory and Techniques, Vol. 72, No. 6, 3650-3661, 2024. Google Scholar

11. Yang, Shilin, Jun Xu, Zhiqiang Yu, Jianyi Zhou, and Wei Hong, "A structure reuse method for realizing large frequency ratio dual-band multi-channel integrated filters," IEEE Transactions on Circuits and Systems II: Express Briefs, Vol. 69, No. 4, 2101-2105, 2022. Google Scholar

12. Wei, Huanjie and Fang Zhu, "A dual-band filtering crossover with large frequency ratio for microwave and millimeter-wave applications," Microwave and Optical Technology Letters, Vol. 65, No. 11, 2890-2896, 2023. Google Scholar

13. Qiu, Lei-Lei, Yiming Guo, Lei Zhu, Zhao-An Ouyang, Shengxiang Huang, and Lianwen Deng, "Third-order filtering crossover using dual-mode resonator for high-isolated channels," International Journal of Communication Systems, Vol. 37, No. 2, e5639, 2024. Google Scholar

14. Amari, Smain, Uwe Rosenberg, and Jens Bornemann, "Adaptive synthesis and design of resonator filters with source/load-multiresonator coupling," IEEE Transactions on Microwave Theory and Techniques, Vol. 50, No. 8, 1969-1978, 2002. Google Scholar

15. Hong, J. and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, John Wiley & Sons, 2004.

Dr. Tianle Zhou

Dr. Yuchen Yin

Dr. Wei Shen

Dr. Zixuan Yi

Dr. Tao Zhao