Design of Wide-Stopband and Dual-Band Filtering Crossovers Based on Mixed Substrate Integrated Waveguide Cavities

Millimetre‐wave on‐chip SIW filtering crossover using 0.25 µm GaAs pHEMT technology

“…In recent years, considerable research efforts have been focused on the design and implementation of SIW filtering crossovers [3][4][5][6][7]. One methodology proposed in [3] utilizes degenerate modes to enable cross transmission and inter-channel isolation.…”

“…Moreover, [5] proposes a method for achieving SIW filtering crossovers with an extended number of channels. In [6] and [7], SIW filtering crossovers are designed with enhanced stopband rejection performance. Despite the excellent performance achieved by the aforementioned filtering crossovers, their applications have been limited to frequencies below the mm-wave range.…”