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A substrate integrated folded waveguide (SIFW) H-plane band-pass filter with double H-plane septa based on LTCC

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3 Author(s)
Zhengwei Wang ; Sch. of Optoelectron. Inf., Univ. of Electron. Sci. & Technol. of China, Chengdu, China ; Shirong Bu ; Zhengxiang Luo

In this paper, a novel substrate integrated folded waveguide (SIFW) H-plane band-pass filter based on low-temperature co-fired ceramic technology (LTCC) is proposed which employs double H-plane septa of a short-ended evanescent waveguide as an impedance inverter. The filter has advantages of convenient integration, compact, low cost, mass-producibility, and ease of fabrication, and it also has frequency responses similar to those of traditional E-plane double-iris waveguide band-pass filters. To validate the new proposed topology, a three-pole narrowband band-pass filter is designed and fabricated using half-wavelength resonators. A comparison between measured results and simulated results shows good agreement.

Published in:

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on  (Volume:59 ,  Issue: 3 )