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

Theodoros N. Kaifas, John N. Sahalos

Research output: Contribution to journalArticle

27 Citations (Scopus)

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 languageEnglish
Pages (from-to)193-204
Number of pages12
JournalIEEE Antennas and Propagation Magazine
Volume48
Issue number6
DOIs
Publication statusPublished - 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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