volume | PIER Journals

Abstract

This paper proposes a cross-coupled filter that utilizes a coplanar waveguide (CPW) resonator and triangular substrate-integrated waveguide (TSIW) resonant cavities. The filter consists of a CPW resonator etched on the upper metal surface of a second-order triangular SIW resonant cavity. By adjusting the dimensions of the CPW resonator and optimizing the width of the inductive coupling window, precise control can be achieved over cross-coupling between resonators, enabling fine-tuning of both filter bandwidth and transmission zero placement. Simulation and test results indicate that the filter has a center frequency of 11.85 GHz, a -3 dB bandwidth of 1.82 GHz, a relative bandwidth of 15.4%, an insertion loss of -0.9 dB in the passband, a return loss of over 15 dB, and a transmission zero point located at 15 GHz. The filter has a simple structure, wide bandwidth, low insertion loss, small circuit size, and a flexible and controllable transmission zero point, making it potentially valuable for various applications.

1. Bozzi, Maurizio, Anthimos Georgiadis, and Kaijie Wu, "Review of substrate-integrated waveguide circuits and antennas," IET Microwaves, Antennas & Propagation, Vol. 5, No. 8, 909-920, Jun. 2011.

2. Chen, Xiao-Ping and Ke Wu, "Substrate integrated waveguide filter: Basic design rules and fundamental structure features," IEEE Microwave Magazine, Vol. 15, No. 5, 108-116, 2014.

3. Moscato, Stefano, Cristiano Tomassoni, Maurizio Bozzi, and Luca Perregrini, "Quarter-mode cavity filters in substrate integrated waveguide technology," IEEE Transactions on Microwave Theory and Techniques, Vol. 64, No. 8, 2538-2547, Aug. 2016.

4. Jones, Thomas R. and Mojgan Daneshmand, "Miniaturized folded ridged half-mode and quarter-mode substrate integrated waveguides for filter design," IEEE Transactions on Microwave Theory and Techniques, Vol. 67, No. 8, 3414-3426, Aug. 2019.

5. Qin, Runlian, Dan Zhang, Zhendong Ding, and Mengrou Wang, "Duel-band filter with high out-of-band rejection using ACSRR-SIW technology," IEICE Electronics Express, Vol. 17, No. 12, 20190743, Jun. 2020.

6. Shen, Wei, Wen-Yan Yin, Xiao-Wei Sun, and Lin-Sheng Wu, "Substrate-integrated waveguide bandpass filters with planar resonators for system-on-package," IEEE Transactions on Components, Packaging and Manufacturing Technology, Vol. 3, No. 2, 253-261, Feb. 2013.

7. Chen, Xiao-Ping and Ke Wu, "Substrate integrated waveguide cross-coupled filter with negative coupling structure," IEEE Transactions on Microwave Theory and Techniques, Vol. 56, No. 1, 142-149, Jan. 2008.

8. Potelon, Benjamin, Jean-FranÇois Favennec, CÉdric Quendo, Eric Rius, Christian Person, and Juan-Carlos Bohorquez, "Design of a substrate integrated waveguide (SIW) filter using a novel topology of coupling," IEEE Microwave and Wireless Components Letters, Vol. 18, No. 9, 596-598, Sep. 2008.
doi:10.1109/LMWC.2008.2002454

9. Azad, Amit Ranjan, Dharmendra Kumar Jhariya, and Akhilesh Mohan, "Substrate-integrated waveguide cross-coupled filters with mixed electric and magnetic coupling structure," International Journal of Microwave and Wireless Technologies, Vol. 10, No. 8, 896-903, 2018.

10. Shen, Wei, Lin-Sheng Wu, Xiao-Wei Sun, Wen-Yan Yin, and Jun-Fa Mao, "Novel substrate integrated waveguide filters with mixed cross coupling (MCC)," IEEE Microwave and Wireless Components Letters, Vol. 19, No. 11, 701-703, Nov. 2009.

11. You, Chang Jiang, Zhi Ning Chen, Xiao Wei Zhu, and Ke Gong, "Single-layered SIW post-loaded electric coupling-enhanced structure and its filter applications," IEEE Transactions on Microwave Theory and Techniques, Vol. 61, No. 1, 125-130, Jan. 2013.

12. Liu, Qing, DongFang Zhou, DeWei Zhang, and DaLong Lv, "A novel frequency-dependent coupling with flexibly controllable slope and its applications on substrate-integrated waveguide filters," IEEE Microwave and Wireless Components Letters, Vol. 28, No. 11, 993-995, Nov. 2018.

13. Gong, Ke, Wei Hong, Yan Zhang, Peng Chen, and Chang Jiang You, "Substrate integrated waveguide quasi-elliptic filters with controllable electric and magnetic mixed coupling," IEEE Transactions on Microwave Theory and Techniques, Vol. 60, No. 10, 3071-3078, Oct. 2012.

Prof. Xiaohei Yan

Professor Minjie Guo