On the design of a single-layer wideband Butler matrix for switched-beam UMTS system applications

Theodoros N. Kaifas; John N. Sahalos

doi:10.1109/MAP.2006.323317

On the design of a single-layer wideband Butler matrix for switched-beam UMTS system applications

Theodoros N. Kaifas, John N. Sahalos

Department of Engineering

Aristotle University of Thessaloniki

Research output: Contribution to journal › Article › peer-review

Abstract

A Butler matrix (BM) for UMTS applications is presented. The Butler matrix was fabricated by conventional photolithography on a single laminate. The design is compact and complies with the required bandwidth. The design is based on the use of an elliptical coupler with certain geometrical characteristics, and a Lange coupler as a crossover. Furthermore, a design-scaling procedure that produces an N × N Butler matrix by using two (N/2)×(N/2) Butler matrices is given. The presented erformance extrapolations clarify the potential and scalability of our approach.

Original language	English
Pages (from-to)	193-204
Number of pages	12
Journal	IEEE Antennas and Propagation Magazine
Volume	48
Issue number	6
DOIs	https://doi.org/10.1109/MAP.2006.323317
Publication status	Published - Dec 2006

Keywords

Adaptive arrays
Antenna array feeds
Antenna arrays
Butler matrix
Directional coupler
Discrete Fourier transforms
Lange coupler
Smart antennas

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10.1109/MAP.2006.323317

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title = "On the design of a single-layer wideband Butler matrix for switched-beam UMTS system applications",

abstract = "A Butler matrix (BM) for UMTS applications is presented. The Butler matrix was fabricated by conventional photolithography on a single laminate. The design is compact and complies with the required bandwidth. The design is based on the use of an elliptical coupler with certain geometrical characteristics, and a Lange coupler as a crossover. Furthermore, a design-scaling procedure that produces an N × N Butler matrix by using two (N/2)×(N/2) Butler matrices is given. The presented erformance extrapolations clarify the potential and scalability of our approach.",

keywords = "Adaptive arrays, Antenna array feeds, Antenna arrays, Butler matrix, Directional coupler, Discrete Fourier transforms, Lange coupler, Smart antennas",

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AB - A Butler matrix (BM) for UMTS applications is presented. The Butler matrix was fabricated by conventional photolithography on a single laminate. The design is compact and complies with the required bandwidth. The design is based on the use of an elliptical coupler with certain geometrical characteristics, and a Lange coupler as a crossover. Furthermore, a design-scaling procedure that produces an N × N Butler matrix by using two (N/2)×(N/2) Butler matrices is given. The presented erformance extrapolations clarify the potential and scalability of our approach.

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KW - Antenna array feeds

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KW - Butler matrix

KW - Directional coupler

KW - Discrete Fourier transforms

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KW - Smart antennas

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JF - IEEE Antennas and Propagation Magazine

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On the design of a single-layer wideband Butler matrix for switched-beam UMTS system applications

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