A 20-GHz-Band <inline-formula> <tex-math notation="LaTeX">$64\times64$ </tex-math></inline-formula> Hollow Waveguide Two-Dimensional Butler Matrix

A 20-GHz-Band <inline-formula> <tex-math notation="LaTeX">$64\times64$ </tex-math></inline-formula> Hollow Waveguide Two-Dimensional Butler Matrix

In this paper, a 20-GHz-band 64 x 64 hollow waveguide Butler matrix is proposed. By using two-plane short slot couplers and a modified diagram, a short-axis two dimensional Butler matrix is realized. The design method of the diagram and components is presented. The Butler matrix is composed of two p...

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Bibliographic Details
Main Authors: Takashi Tomura, Dong-Hun Kim, Masahiro Wakasa, Yuki Sunaguchi, Jiro Hirokawa, Kentaro Nishimori
Format: Article
Language:English
Published: IEEE 2019-01-01
Series:IEEE Access
Subjects:
Butler matrix
hollow waveguide
two dimensional beam switching
two-plane short slot coupler
Online Access:https://ieeexplore.ieee.org/document/8896011/
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spelling doaj-a72964d648c84c239b35cfaade7e91ff2021-03-30T00:53:18ZengIEEEIEEE Access2169-35362019-01-01716408016408810.1109/ACCESS.2019.29529338896011A 20-GHz-Band <inline-formula> <tex-math notation="LaTeX">$64\times64$ </tex-math></inline-formula> Hollow Waveguide Two-Dimensional Butler MatrixTakashi Tomura0https://orcid.org/0000-0002-9272-8298Dong-Hun Kim1Masahiro Wakasa2Yuki Sunaguchi3Jiro Hirokawa4Kentaro Nishimori5https://orcid.org/0000-0001-8263-2826Department of Electrical and Electronic Engineering, Tokyo Institute of Technology, Tokyo, JapanDepartment of Electrical and Electronic Engineering, Tokyo Institute of Technology, Tokyo, JapanDepartment of Electrical and Electronic Engineering, Tokyo Institute of Technology, Tokyo, JapanDepartment of Electrical and Electronic Engineering, Tokyo Institute of Technology, Tokyo, JapanDepartment of Electrical and Electronic Engineering, Tokyo Institute of Technology, Tokyo, JapanGraduate School of Science and Technology, Niigata University, Niigata, JapanIn this paper, a 20-GHz-band 64 x 64 hollow waveguide Butler matrix is proposed. By using two-plane short slot couplers and a modified diagram, a short-axis two dimensional Butler matrix is realized. The design method of the diagram and components is presented. The Butler matrix is composed of two plane hybrids, cross couplers and phase shifters. The designed Butler matrix is fabricated by milling and screwing together nine aluminum plates. The dimensions and weight are 86.40 mm x 74.19 mm x 396.34 mm and 7.0 kg, respectively. Transmission characteristics as a beam switching circuit are characterized by measurements, with a low insertion loss of less than 1.8 dB and an excitation error of 4-dB and 40-deg. standard deviation. Radiation characteristics as a 64-beam antenna are measured, and a wide coverage area of 40% of the hemisphere and high directivity of more than 18.7 dBi were determined by measurements.https://ieeexplore.ieee.org/document/8896011/Butler matrixhollow waveguidetwo dimensional beam switchingtwo-plane short slot coupler
collection DOAJ
language English
format Article
sources DOAJ
author Takashi Tomura
Dong-Hun Kim
Masahiro Wakasa
Yuki Sunaguchi
Jiro Hirokawa
Kentaro Nishimori
spellingShingle Takashi Tomura
Dong-Hun Kim
Masahiro Wakasa
Yuki Sunaguchi
Jiro Hirokawa
Kentaro Nishimori
A 20-GHz-Band <inline-formula> <tex-math notation="LaTeX">$64\times64$ </tex-math></inline-formula> Hollow Waveguide Two-Dimensional Butler Matrix
IEEE Access
Butler matrix
hollow waveguide
two dimensional beam switching
two-plane short slot coupler
author_facet Takashi Tomura
Dong-Hun Kim
Masahiro Wakasa
Yuki Sunaguchi
Jiro Hirokawa
Kentaro Nishimori
author_sort Takashi Tomura
title A 20-GHz-Band <inline-formula> <tex-math notation="LaTeX">$64\times64$ </tex-math></inline-formula> Hollow Waveguide Two-Dimensional Butler Matrix
title_short A 20-GHz-Band <inline-formula> <tex-math notation="LaTeX">$64\times64$ </tex-math></inline-formula> Hollow Waveguide Two-Dimensional Butler Matrix
title_full A 20-GHz-Band <inline-formula> <tex-math notation="LaTeX">$64\times64$ </tex-math></inline-formula> Hollow Waveguide Two-Dimensional Butler Matrix
title_fullStr A 20-GHz-Band <inline-formula> <tex-math notation="LaTeX">$64\times64$ </tex-math></inline-formula> Hollow Waveguide Two-Dimensional Butler Matrix
title_full_unstemmed A 20-GHz-Band <inline-formula> <tex-math notation="LaTeX">$64\times64$ </tex-math></inline-formula> Hollow Waveguide Two-Dimensional Butler Matrix
title_sort 20-ghz-band <inline-formula> <tex-math notation="latex">$64\times64$ </tex-math></inline-formula> hollow waveguide two-dimensional butler matrix
publisher IEEE
series IEEE Access
issn 2169-3536
publishDate 2019-01-01
description In this paper, a 20-GHz-band 64 x 64 hollow waveguide Butler matrix is proposed. By using two-plane short slot couplers and a modified diagram, a short-axis two dimensional Butler matrix is realized. The design method of the diagram and components is presented. The Butler matrix is composed of two plane hybrids, cross couplers and phase shifters. The designed Butler matrix is fabricated by milling and screwing together nine aluminum plates. The dimensions and weight are 86.40 mm x 74.19 mm x 396.34 mm and 7.0 kg, respectively. Transmission characteristics as a beam switching circuit are characterized by measurements, with a low insertion loss of less than 1.8 dB and an excitation error of 4-dB and 40-deg. standard deviation. Radiation characteristics as a 64-beam antenna are measured, and a wide coverage area of 40% of the hemisphere and high directivity of more than 18.7 dBi were determined by measurements.
topic Butler matrix
hollow waveguide
two dimensional beam switching
two-plane short slot coupler
url https://ieeexplore.ieee.org/document/8896011/
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