Planar Realization of a Triple-Mode Bandpass Filter Using a Multilayer Configuration

A triple-mode bandpass filter has been designed using a multilayer approach. The filter topology consists of a square loop resonator located inside a resonant cavity. The walls of the cavity were designed using periodic metal vias that connect the top and bottom ground planes for an overall planar configuration. A filter prototype was fabricated and measured, producing a fully canonical filtering function with three resonant poles and three transmission zeros. The filter yielded an insertion loss of 1.1 dB at the passband centered at 5.8 GHz

[1]  L. H. Chua,et al.  Analysis and design of three transmission zeros bandpass filter utilizing triple-mode dielectric loaded cubical cavity , 2003, IEEE MTT-S International Microwave Symposium Digest.

[2]  Petrie Meyer,et al.  A shorted waveguide-stub coupling mechanism for narrow-band multimode coupled resonator filters , 2004 .

[3]  A. Gorur,et al.  A novel dual-mode bandpass filter with wide stopband using the properties of microstrip open-loop resonator , 2002, IEEE Microwave and Wireless Components Letters.

[4]  Kawthar A. Zaki,et al.  A circuit model of probes in dual-mode cavities , 1988 .

[5]  L. H. Chua,et al.  Analysis of dielectric loaded cubical cavity for triple-mode filter design , 2004 .

[6]  A. E. Atia,et al.  Dual Mode Canonical Waveguide Filters , 1977 .

[7]  S. J. Fiedziuszko,et al.  Dual-Mode Dielectric Resonator Loaded Cavity Filters , 1982 .

[8]  Michael J. Lancaster,et al.  Bandpass characteristics of new dual-mode microstrip square loop resonators , 1995 .

[9]  C.H. Cheng,et al.  A novel coplanar-waveguide bandpass filter using a dual-mode square-ring resonator , 2006, IEEE Microwave and Wireless Components Letters.

[10]  Lye Heng Chua,et al.  Rigorous Analysis of Effect of Input-output Direct Coupling on Triple-mode Third-order Chebyshev Bandpass Filter , 2003, 2003 33rd European Microwave Conference, 2003.

[11]  Kawthar A. Zaki,et al.  Modeling discontinuities in dielectric-loaded waveguides , 1988 .

[12]  A.E. Williams,et al.  Dual Mode Canonical Waveguide Filters , 1977, 1977 IEEE MTT-S International Microwave Symposium Digest.

[13]  Adnan Görür,et al.  Description of coupling between degenerate modes of a dual-mode microstrip loop resonator using a novel perturbation arrangement and its dual-mode bandpass filter applications , 2004, IEEE Transactions on Microwave Theory and Techniques.

[14]  M. Guglielmi,et al.  CAD of triple-mode cavities in rectangular waveguide , 1998 .

[15]  A. E. Atia,et al.  Tuning and measurements of couplings and resonant frequencies for cascaded resonators , 2000, 2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017).

[16]  Y. Ishikawa,et al.  2 GHz band triple mode dielectric resonator duplexer for digital cellular base station , 2000, 2000 Asia-Pacific Microwave Conference. Proceedings (Cat. No.00TH8522).

[17]  Jiasheng Hong.  Couplings of asynchronously tuned coupled microwave resonators , 2000 .

[18]  Ikuo Awai,et al.  Control of attenuation pole frequency of a dual-mode microstrip ring resonator bandpass filter , 2001 .

[19]  Ian Hunter,et al.  Triple mode dielectric resonator hybrid reflection filters , 1998 .

[20]  Gabriel M. Rebeiz,et al.  A miniature 2.1-GHz low loss microstrip filter with independent electric and magnetic coupling , 2004, IEEE Microwave and Wireless Components Letters.