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2015-08-13

Substrate Integrated Evanescent Filters Employing Coaxial Stubs

By Vitaliy Zhurbenko
Progress In Electromagnetics Research C, Vol. 59, 21-30, 2015
doi:10.2528/PIERC15062402

Abstract

Evanescent mode substrate integrated waveguide (SIW) is one of the promising technologies for design of light-weight low-cost microwave components. Traditional realization methods used in the standard evanescent waveguide technology are often not directly applicable to SIW due to dielectric filling and small height of the waveguide. In this work, one of the realization methods of evanescent mode waveguides using a single layer substrate is considered. The method is based on the use of coaxial stubs as capacitive susceptances externally connected to a SIW. A microwave filter based on these principles is designed, fabricated, and tested. The filter exhibits a transmission zero due to the implemented stubs. The problem of evanescent mode filter analysis is formulated in terms of conventional network concepts. This formulation is then used for modelling of the filters. Strategies to further miniaturization of the microwave filter are discussed. The approach is useful in applications where a sharp roll-off at the upper stop-band is required.

Citation


Vitaliy Zhurbenko, "Substrate Integrated Evanescent Filters Employing Coaxial Stubs," Progress In Electromagnetics Research C, Vol. 59, 21-30, 2015.
doi:10.2528/PIERC15062402
http://www.jpier.org/PIERC/pier.php?paper=15062402

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