Compact dual-band filter using two layered dual-mode substrate integrated waveguide resonator

Triple‐mode dual‐band bandpass filter based on cross‐shaped substrate integrated waveguide

“…The multimode multi-band filters can satisfy the requirements well. Moreover, many design methods for multimode multi-band filters have been proposed [1][2][3][4][5][6][7]. In [1], cascading three dual-mode substrate integrated waveguide (SIW) cavities with transmission zeros which are produced by cavities is proposed to design a three-pole millimetre wave dual-band bandpass filter (BPF).…”

“…In [1], cascading three dual-mode substrate integrated waveguide (SIW) cavities with transmission zeros which are produced by cavities is proposed to design a three-pole millimetre wave dual-band bandpass filter (BPF). In [2,3], the coupling mechanism is applied for dual-band filters design. In [2], three square waveguides with diagonally polarised modes are coupled to produce triple-mode dual-band filter, but the size is large.…”

“…In [2], three square waveguides with diagonally polarised modes are coupled to produce triple-mode dual-band filter, but the size is large. In [3], two-layered dual-mode SIW resonator is coupled to design compact dual-band filter. In [4][5][6], the characteristic of differential-mode and common-mode is utilised to achieve dual-mode dual-band filter.…”