Novel Substrate Integrated Waveguide Filter

OTT case 11-017 | Patent Pending

The main concept of this low cost filter is the use of metallic diaphragms (strips with small thickness) with certain widths mounted inside the waveguide parallel to the electric field plane with specific spacing between them. These metallic strips are considered as discontinuities inside the waveguide that will generate higher order modes. This filter was designed such that it is electromagnetically isolated inside the SIW and excited using grounded coplanar waveguide (GCPW) to SIW transitions; therefore, it can be easily integrated with MMICs. Three-dimensional electromagnetic field modeling and simulation was carried out on this filter design using High Frequency Structure Simulator (HFSS). The filter can be used efficiently in the following frequency bands: X-band, Ku-band, K-band, and Ka-band.