Abstract
A family of miniaturized substrate integrated waveguide (SIW) dual-mode fllters with a series of cross-slot structures etched on the waveguide surface are investigated and presented. By introducing the series of cross-slot structures: pure cross-slot, T-shaped loaded cross-slot and H-shaped loaded cross-slot in original dual-mode SIW fllters, size reductions of 22.15%, 30.56% and 56.25% are achieved, respectively. Moreover, the proposed family of SIW dual-mode fllters can produce two controllable transmission zeros. Compared with SIW dual-mode fllters in references and original fllter, proposed fllters exhibit compact size while retain good performance of bandwidth and minimum insertion loss. To verify the presented design, three SIW dual-mode fllters are fabricated on the standard printed circuit board process. The measured results are in good agreement with the simulation.
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