Novel two-layer broadband 4 × 4 Butler matrix in SIW technology for Ku-band applications

In this paper, the design of a broadband 4x4 Butler matrix is presented for the first time on a two-layer Substrate Integrated Waveguide (SIW) structure. The presence of path crossings in the matrix structure often imposes the use of extra OdB couplers - usually obtained using back to back pairs of...

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Bibliographic Details
Published in2008 Asia-Pacific Microwave Conference pp. 1 - 4
Main Authors Ali, A., Fonseca, N., Coccetti, F., Aubert, H.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2008
Subjects
Butler matrix
Couplers
Delay
Electromagnetic waveguides
Insertion loss
Microstrip
Phase shifters
Resonance
Transmission line matrix methods
Wideband
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Summary:In this paper, the design of a broadband 4x4 Butler matrix is presented for the first time on a two-layer Substrate Integrated Waveguide (SIW) structure. The presence of path crossings in the matrix structure often imposes the use of extra OdB couplers - usually obtained using back to back pairs of 3dB couplers - for planar realizations. Specific designs that overcome the use of OdB couplers can be found, but these realizations may not be easily generalized to larger matrices. On the other hand, realizations with suspended lines suffer from being narrow band and rather adapted to microstrip technology [4]. A two-layer implementation in SIW technology appears then as a good compromise as it remains compact in height and compatible with both waveguide-like and microstrip technologies.
ISBN:9781424426416
1424426413
ISSN:2165-4727
2165-4743
DOI:10.1109/APMC.2008.4958211