Together with our colleagues at the Technical University of Munich, we have published an article in “Advances in Radio Science”, a journal of the U.R.S.I. Landesausschuss Deutschland e.V.
In this journal we proposed an interdigital resonator approach for wideband filter applications in ridged-waveguide technology. The technology of ridged-waveguide filters provides high midband frequencies as well as the suppression of spurious passbands up until very high frequencies. Due to the concept of these filters, broad bandwidths lead to reduced filter dimensions that are very difficult to fabricate. The interdigital arrangement of resonators guarantees a more reliable fabrication of these filters. The approach itself can be easily implemented with conventional filter synthesis formulas, which is demonstrated by two 20 GHz examples with a bandwidth of 2 GHz and 100 MHz, respectively. The designed filters are subsequently compared to the standard implementation of ridged-waveguide filters.
The aim of this research project was to develope filters for various frequency bands in the 5G communication standard and was supported in part under a grant from the Bayerisches Staatsministerium für Wirtschaft, Energie und Technologie.
The article can be accessed freely here.