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Design and optimization of a planar folded substrate integrated waveguide bandpass filter exploiting aggressive space mapping
Author(s) -
Zhang Xuanxuan,
Ou Wen,
Ou Yi
Publication year - 2019
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21713
Subject(s) - return loss , center frequency , bandwidth (computing) , band pass filter , insertion loss , planar , microwave , materials science , waveguide , filter (signal processing) , microelectromechanical systems , optoelectronics , optics , physics , computer science , telecommunications , electrical engineering , engineering , computer graphics (images) , antenna (radio)
Substrate integrated waveguide (SIW) is a new structure for microwave transmission. In this paper, a planar folded sixth‐order SIW filter is designed with aggressive space mapping (ASM) algorithm. Its center frequency is 22 GHz, 3 dB bandwidth 1 GHz, and in‐band return loss 22 dB. The filter satisfies design specifications after four iterations, and is fabricated using micro‐electro‐mechanical systems (MEMS) technology with a chip size of 7.5 mm × 8.5 mm × 0.4 mm. Measurement results show that the center frequency of the filter measures at 22.2 GHz, 3 dB bandwidth at 1 GHz, insertion loss at 3.57 dB, return loss at 22 dB and out‐of‐band rejection at 40 dB.