In this letter, we present a method for enhancing the stopband attenuation performance of a K-band TM21 mode filter using substrate-integrated waveguide resonators. To improve the stopband response, we suppress and move spurious resonant peaks and produce transmission zeros. The step-by-step procedure of the proposed three-step method is shown in detail. The measurements show that when using the presented method, the filters exhibit better stopband performances than those in which the presented steps are not followed.
- K-band filter
- substrate-integrated wave-guide (SIW)
- upper stopband
ASJC Scopus subject areas
- Condensed Matter Physics
- Electrical and Electronic Engineering