Design and Multiphysics Analysis of Direct and Cross-Coupled SIW Combline Filters Using Electric and Magnetic Couplings

In this paper, combline substrate integrated waveguide (SIW) filters using electric and magnetic couplings are thoroughly studied. Thus, a negative coupling scheme consisting on an open-ended coplanar probe is proposed and analyzed in detail. Several in-line 3-pole filters at C-band are designed, manufactured and measured showing how the presented approach can be used for implementing direct couplings while enabling an important size reduction and improved spurious-free band compared to conventional magnetic irises. A fully-packaged quasi-elliptic 4-pole filter is also designed at 5.75 GHz showing how the negative coupling structure can be used for introducing transmission zeros by means of cross-couplings between non-adjacent resonators. Finally, average and peak power handling capabilities of these filters have been also analyzed from a multiphysics point of view. Measured results validate the theoretical predictions confirming that combline SIW filters can handle significant levels of continuous and peak power, providing at the same time easy integration, compact size and advanced filtering responses.

[1]  K. Gupta,et al.  Microstrip Lines and Slotlines , 1979 .

[2]  V. Postoyalko,et al.  Prediction of peak internal fields in direct-coupled-cavity filters , 2003 .

[3]  Roberto Sorrentino,et al.  Quasi-elliptic filter based on SIW combline resonators using a coplanar line cross-coupling , 2015, 2015 IEEE MTT-S International Microwave Symposium.

[4]  Pierre Blondy,et al.  Compact SMD packaged tunable filter based on substrate integrated coaxial resonators , 2014, 2014 IEEE MTT-S International Microwave Symposium (IMS2014).

[5]  D. Peroulis,et al.  Tunable Inter-Resonator Coupling Structure With Positive and Negative Values and Its Application to the Field-Programmable Filter Array (FPFA) , 2011, IEEE Transactions on Microwave Theory and Techniques.

[6]  Ke Wu,et al.  Substrate integrated waveguide (SIW) linear phase filter , 2005, IEEE Microwave and Wireless Components Letters.

[7]  Xi-Lang Zhou,et al.  Bandpass Filter Using Substrate Integrated Waveguide Cavity Loaded With Dielectric Rod , 2009, IEEE Microwave and Wireless Components Letters.

[8]  Tao Yang,et al.  Substrate Integrated Waveguide Loaded by Complementary Split-Ring Resonators and Its Applications to Miniaturized Waveguide Filters , 2009, IEEE Transactions on Microwave Theory and Techniques.

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

[10]  Cheng Jin,et al.  Compact Triple-Mode Filter Based on Quarter-Mode Substrate Integrated Waveguide , 2015, IEEE Transactions on Microwave Theory and Techniques.

[11]  Swen Kortig,et al.  Foundations For Microwave Engineering , 2016 .

[12]  C. Quendo,et al.  Design of a Substrate Integrated Waveguide (SIW) Filter Using a Novel Topology of Coupling , 2008, IEEE Microwave and Wireless Components Letters.

[13]  Cedric Quendo,et al.  Mutiphysics study of RF/microwave planar devices: Effect of the input signal power , 2014, 2014 15th International Conference on Thermal, Mechanical and Mulit-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE).

[14]  R. Levy,et al.  Filters with Single Transmission Zeros at Real or Imaginary Frequencies , 1976 .

[15]  Ke Wu,et al.  Substrate Integrated Waveguide Filters: Practical Aspects and Design Considerations , 2014, IEEE Microwave Magazine.

[16]  Stephane Cadiou,et al.  Average Power Handling Capability of Microstrip Passive Circuits Considering Metal Housing and Environment Conditions , 2014, IEEE Transactions on Components, Packaging and Manufacturing Technology.

[17]  Jia-Sheng Hong,et al.  Microstrip filters for RF/microwave applications , 2001 .

[18]  Ming Yu,et al.  Power-handling capability for RF filters , 2007, IEEE Microwave Magazine.

[19]  B. Sanz-Izquierdo,et al.  Substrate integrated folded waveguides (SIFW) and filters , 2005, IEEE Microwave and Wireless Components Letters.

[20]  W. Hong,et al.  Substrate Integrated Waveguide Quasi-Elliptic Filters With Controllable Electric and Magnetic Mixed Coupling , 2012, IEEE Transactions on Microwave Theory and Techniques.

[21]  Jiasheng Hong.  Microstrip Filters for RF/Microwave Applications: Hong/Microstrip Filters 2E , 2011 .

[22]  J. B. Thomas,et al.  Cross-coupling in coaxial cavity filters - a tutorial overview , 2003 .

[23]  Wen-Yan Yin,et al.  Substrate-Integrated Waveguide Bandpass Filters With Planar Resonators for System-on-Package , 2013, IEEE Transactions on Components, Packaging and Manufacturing Technology.

[24]  W. Woo,et al.  Microwave absorption and plasma heating due to microwave breakdown in the atmosphere , 1984 .

[25]  Ke Wu,et al.  Substrate Integrated Waveguide Cross-Coupled Filter With Negative Coupling Structure , 2008, IEEE Transactions on Microwave Theory and Techniques.

[26]  V. E. Boria,et al.  Compact CPW-Fed Combline Filter in Substrate Integrated Waveguide Technology , 2012, IEEE Microwave and Wireless Components Letters.

[27]  Yuanqing Wang,et al.  Half Mode Substrate Integrated Waveguide (HMSIW) Bandpass Filter , 2007, IEEE Microwave and Wireless Components Letters.

[28]  K. C. Gupta,et al.  Average power-handling capability of microstrip lines , 1979 .

[29]  Miguel A. Sanchez-Soriano,et al.  Parallel-coupled line filter design from an energetic coupling approach , 2011 .