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IEICE TRANSACTIONS on Electronics

A Single-Layer Hollow-Waveguide 8-Way Butler Matrix

Shin-ichi YAMAMOTO, Jiro HIROKAWA, Makoto ANDO

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Summary :

The authors propose a single-layer hollow-waveguide 8-way Butler matrix. All components of the Butler matrix are in a single layer which contributes to low-cost fabrication. To reduce the length of the couplers, a step structure is installed in the coupled region. 50% length reduction is obtained in comparison with the conventional design using reflection-suppressing posts in the coupled region. The total size of the matrix is 17.1λg6.0λg. The full structure of the matrix is fabricated by hollow waveguides at 22 GHz band and the total measured loss is only 0.25 dB.

Publication
IEICE TRANSACTIONS on Electronics Vol.E89-C No.7 pp.1080-1088
Publication Date
2006/07/01
Publicized
Online ISSN
1745-1353
DOI
10.1093/ietele/e89-c.7.1080
Type of Manuscript
PAPER
Category
Microwaves, Millimeter-Waves

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