Summary
International Symposium on Antennas and Propagation
2006
Session Number:2D1b
Session:
Number:2D1b-1
Four-Way Butler Matrix of Double-Layer Rectangular Waveguides using Broad-Wall Slit Coupling
Jiro Hirokawa, Hiroyuki Hoshi, Minoru Furukawa, Keizo Cho, Naohisa Goto,
pp.1-4
Publication Date:2006/11/2
Online ISSN:2188-5079
Summary:
The authors design and fabricate a full double-layer structure of rectangular waveguides for a four-way Butler matrix for a band from 3.9GHz to 4.1GHz. The waveguide Butler matrix is expected to be used for a multi-beam antenna in mobile communications at high frequencies. Use of slits in the hybrids and the phase shifters enhances the bandwidth of the dividing characteristics of Butler matrix in comparison with use of slots. The maximum of the amplitude difference among the output port is 3.1dB and the phase deviation from the desired value is 5.2 deg over the 200MHz bandwidth.