Development of Substrate Integrated Waveguide filters for low-cost high-density RF and microwave circuit integration: Pseudo-elliptic dual mode cavity band-pass filters

Abstract The properties of dual mode resonance in planar SIW-based rectangular cavities are investigated and discussed. A specific mode combination of dual mode cavity presents a unique frequency response feature. With the aid of an optimization process or software, it is convenient to cascade a number of cavities with coupling apertures to form a filter. A 3-cavity pseudo-elliptic SIW filter based on H203 & H104 hybrid resonance is designed and fabricated on a Rogers TMM3 substrate. Measured results show that the insertion loss at the central frequency around 24 GHz is 4.58 dB and the return loss is better than 20 dB in the whole pass-band of 760 MHz. The design method can widely be used for high-density microwave integrated circuits and the mass-fabrication of such filters is made easy even when keeping development and processing costs very low.

[1]  Seymour B. Cohn,et al.  The Electric Polarizability of Apertures of Arbitrary Shape , 1952, Proceedings of the IRE.

[2]  A. Atia,et al.  Narrow-Bandpass Waveguide Filters , 1972 .

[3]  A. E. Atia,et al.  Narrow-band multiple-coupled cavity synthesis , 1974 .

[4]  R. M. Kurzrok,et al.  General Four-Resonator Filters at Microwave Frequencies (Correspondence) , 1966 .

[5]  Seymour B. Cohn,et al.  Microwave Coupling by Large Apertures , 1952, Proceedings of the IRE.

[6]  Alejandro Alvarez-Melcon,et al.  Enhanced topologies for the design of dual‐mode filters using inductive waveguide structures , 2015 .

[7]  Wei Hong,et al.  Development of Millimeter-Wave Planar Diplexers Based on Complementary Characters of Dual-Mode Substrate Integrated Waveguide Filters With Circular and Elliptic Cavities , 2007, IEEE Transactions on Microwave Theory and Techniques.

[8]  A. Morini,et al.  A prototype for the design of planar waveguide filters, also containing transmission zeros, with close correspondence to the physical structure , 2004, 2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535).

[9]  J. Rhodes The Generalized Direct-Coupled Cavity Linear Phase Filter , 1970 .

[10]  Xiao-Peng Liang,et al.  Dual mode coupling by square corner cut in resonators and filters , 1992 .

[11]  A. E. Williams A Four-Cavity Elliptic Waveguide Filter , 1970 .

[12]  Ke Wu,et al.  Development of Substrate-Integrated Waveguide Filters for Low-Cost High-Density RF and Microwave Circuit Integration: Direct-Coupled Cavity Bandpass Filters With Chebyshev Response , 2015, IEEE Access.

[13]  S. Amari,et al.  Novel E-plane filters and diplexers with elliptic response for millimeter-wave applications , 2005, IEEE Transactions on Microwave Theory and Techniques.

[14]  M. Guglielmi,et al.  A new family of all-inductive dual-mode filters , 2001 .

[15]  R. M. Kurzrok,et al.  General Three-Resonator Filters in Waveguide , 1966 .

[16]  Seymour B. Cohn,et al.  Determination of Aperture Parameters by Electrolytic-Tank Measurements , 1951, Proceedings of the IRE.