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Progress In Electromagnetics Research Letters
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REALIZATION OF MILLIMETER-WAVE DUAL-MODE FILTERS USING SQUARE HIGH-ORDER MODE CAVITIES

By Y. D. Dong, W. Hong, and H. J. Tang

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Abstract:
Some interesting results are presented in this paper by investigating the characteristics of square high-order mode cavities. Based on the standard printed circuit board (PCB) process and the substrate integrated waveguide (SIW) technology, two different square cavities which exhibit dual-mode filtering response are studied and implemented. Their bandwidths can be controlled by adjusting the eigen-frequencies of the resonating modes and the coupling apertures. The proposed configurations also allow implementing transmission zeros to improve the selectivity in an easy way. A Q-band quasi-elliptic filter using such two cavities in a folded configuration is designed, fabricated and measured. High selectivity and small insertion loss are achieved which are in good agreement with the simulated results.

Citation:
Y. D. Dong, W. Hong, and H. J. Tang, "Realization of Millimeter-Wave Dual-Mode Filters Using Square High-Order Mode Cavities," Progress In Electromagnetics Research Letters, Vol. 27, 33-42, 2011.
doi:10.2528/PIERL11091502

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