Compact 12–18-GHz Bandpass Filter with Wide Stopband Using Hybrid Dual-Mode SIDGS/Microstrip Resonant Cell

In this paper, a compact 12–18-GHz bandpass filter (BPF) with wide stopband is proposed for Ku-band satellite applications. The stacked-coupled hybrid dual-mode substrate-integrated defected ground structure (SIDGS)/microstrip resonant cell is introduced to generate a wide passband response with high selectivity in a compact size. In addition, stepped-impedance feed-lines are utilized to extend stopband width, while the self-shielded structure can finely suppress the radiation leakage. To verify the mechanism, a BPF operating at 15 GHz (i.e., center frequency f0) with a 3-dB fractional bandwidth (FBW) of 52% and wide stopband up to 60 GHz is implemented and fabricated. Such BPF is suitable for system integration with a 4×2.7 mm2 core circuit size.

[1]  Yuandan Dong,et al.  Compact Half-Mode SIW Filter With High Selectivity and Improved Stopband Performance , 2022, IEEE Microwave and Wireless Components Letters.

[2]  W. Feng,et al.  Novel Wideband Bandpass Filters Using Double-Sided Quasi-SSPPs Transmission Line , 2022, IEEE Transactions on Circuits and Systems II: Express Briefs.

[3]  Yiyang Shu,et al.  Compact UWB BPF With Broad Stopband Based on Loaded-Stub and C-Shape SIDGS Resonators , 2022, IEEE Microwave and Wireless Components Letters.

[4]  Yuandan Dong,et al.  A Novel Compact Wide-Stopband Filter With Hybrid Structure by Combining SIW and Microstrip Technologies , 2021, IEEE Microwave and Wireless Components Letters.

[5]  H. Qian,et al.  Compact Wideband BPF With Wide Stopband Using Substrate Integrated Defected Ground Structure , 2021, IEEE Microwave and Wireless Components Letters.

[6]  Yuandan Dong,et al.  Compact, Wide Stopband, Shielded Hybrid Filter Based on Quarter-Mode Substrate Integrated Waveguide and Microstrip Line Resonators , 2021, IEEE Microwave and Wireless Components Letters.

[7]  H. Qian,et al.  Substrate-Integrated Defected Ground Structure for Single- and Dual-Band Bandpass Filters With Wide Stopband and Low Radiation Loss , 2021, IEEE Transactions on Microwave Theory and Techniques.

[8]  R. Gómez‐García,et al.  Compact Substrate-Integrated Bandstop Filters Using Double-Resonant Coaxial Resonators , 2020, IEEE Microwave and Wireless Components Letters.

[9]  Raafat R. Mansour,et al.  A Novel Bandwidth Reconfigurable Waveguide Filter for Aerospace Applications , 2020, IEEE Microwave and Wireless Components Letters.

[10]  Y. Jeong,et al.  Compact and Wide Stopband Substrate Integrated Waveguide Bandpass Filter Using Mixed Quarter- and One-Eighth Modes Cavities , 2020, IEEE Microwave and Wireless Components Letters.

[11]  W. Hong,et al.  Compact Bandpass Filter With Multiple Coupling Paths in Limited Space for Ku-Band Application , 2017, IEEE Microwave and Wireless Components Letters.

[12]  Raafat R. Mansour,et al.  Compact Waveguide Dual-Band Filters and Diplexers , 2017, IEEE Transactions on Microwave Theory and Techniques.

[13]  Quanyuan Feng,et al.  Multilayer Substrate Integrated Waveguide (SIW) Filters With Higher-Order Mode Suppression , 2016, IEEE Microwave and Wireless Components Letters.

[14]  Guo-Min Yang,et al.  Compact UWB Bandpass Filter With Dual Notched Bands Using Defected Ground Structures , 2014, IEEE Microwave and Wireless Components Letters.

[15]  Ke Wu,et al.  Cross-Coupled Substrate Integrated Waveguide Filters With Improved Stopband Performance , 2012, IEEE Microwave and Wireless Components Letters.

[16]  Young-Sik Kim,et al.  Ultra-Wideband Bandpass Filter With Improved Upper Stopband Performance Using Defected Ground Structure , 2010, IEEE Microwave and Wireless Components Letters.

[17]  Ke Wu,et al.  Substrate Integrated Waveguide Filter With Improved Stopband Performance for Satellite Ground Terminal , 2009, IEEE Transactions on Microwave Theory and Techniques.

[18]  Jia-Sheng Hong,et al.  Compact Ultra-Wideband Microstrip/Coplanar Waveguide Bandpass Filter , 2007, IEEE Microwave and Wireless Components Letters.

[19]  D. Baillargeat,et al.  Synthesis and design of asymmetrical dual-band bandpass filters based on equivalent network simplification , 2006, IEEE Transactions on Microwave Theory and Techniques.