Novel design of substrate integrated waveguide filter employing broadside-coupled complementary split ring resonators

Abstract

A novel design of filter based on substrate integrated waveguide (SIW) structure is presented in this letter, and a pair of broadside-coupled complementary split ring resonators (BC-CSRRs) are used in the filter. The filter has a very simple structure and a very compact size. Its characteristics are discussed. In order to verify the proposed design, an example of the proposed filter with a center frequency of 5 GHz is fabricated and measured, and good results obtained. Moreover, a way to make further use of the proposed structure to design dual-band filter is also discussed in this letter, and an example of dual-band filter has been fabricated and measured.