A Beam Switching Slot Array with a 4-Way Butler Matrix Installed in Single Layer Post-Wall Waveguides

Shin-ichi YAMAMOTO  Jiro HIROKAWA  Makoto ANDO  

Publication
IEICE TRANSACTIONS on Communications   Vol.E86-B   No.5   pp.1653-1659
Publication Date: 2003/05/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Antenna and Propagation
Keyword: 
Butler matrix,  switching array,  base station antenna,  post-wall waveguide,  millimeter-wave,  

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Summary: 
The authors proposed a switching beam slot array antenna with a 4-way Butler matrix. All are integrated in one substrate with post-wall waveguide techniques. The planar Butler matrix is realized by using short slot directional couplers (cross coupler). Experiments in 26GHz band confirmed the key operation of this antenna; almost identical four beams are switched to cover the total of horizontal 90-degree sector with equal angular spacing.