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Open Access
Design and Fabrication of PTFE Substrate-Integrated Waveguide Butler Matrix for Short Millimeter Waves

Mitsuyoshi KISHIHARA, Kaito FUJITANI, Akinobu YAMAGUCHI, Yuichi UTSUMI, Isao OHTA

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Summary :

We attempt to design and fabricate of a 4×4 Butler matrix for short-millimeter-wave frequencies by using the microfabrication process for a polytetrafluoroethylene (PTFE) substrate-integrated waveguide (SIW) by the synchrotron radiation (SR) direct etching of PTFE and the addition of a metal film by sputter deposition. First, the dimensions of the PTFE SIW using rectangular through-holes for G-band (140-220 GHz) operation are determined, and a cruciform 90 ° hybrid coupler and an intersection circuit are connected by the PTFE SIW to design the Butler matrix. Then, a trial fabrication is performed. Finally, the validity of the design result and the fabrication process is verified by measuring the radiation pattern.

Publication
IEICE TRANSACTIONS on Electronics Vol.E106-C No.3 pp.111-115
Publication Date
2023/03/01
Publicized
2022/10/13
Online ISSN
1745-1353
DOI
10.1587/transele.2022ECS6003
Type of Manuscript
BRIEF PAPER
Category
Microwaves, Millimeter-Waves

Authors

Mitsuyoshi KISHIHARA
  Okayama Prefectural University
Kaito FUJITANI
  University of Hyogo
Akinobu YAMAGUCHI
  University of Hyogo
Yuichi UTSUMI
  University of Hyogo
Isao OHTA
  University of Hyogo

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