Channel Coupling between Filters in Gap Waveguide Antenna Arrays

Gap waveguides provide an attractive alternative to conventional waveguides at millimetre wave frequencies and above. The isolation between adjacent channels in an antenna array is limited by the number of physical rows of gap waveguide pins in the system. Filter resonators couple strongly into adjacent channels and can effect the performance of antenna arrays they are integrated into. This paper presents the analysis of the effects of integrating a third order filter into a gap waveguide antenna array with the degradation of the farfield performance both with and without beam steering investigated.