A New Design of Compact 4×4 Butler Matrix for ISM Applications. (25th February 2009)

• Record Type: Journal Article
• Authors: Traii, Mbarek; Nedil, Mourad; Gharsallah, Ali; Denidni, Tayeb A.
• Other Names: Nishikawa Kenjiro Academic Editor.
• Is Part Of: International journal of microwave science and technology. Volume 2008(2008)
• Publication Date: 2009-02-25
• Subjects: Radio frequency -- Periodicals; Microwave circuits -- Periodicals; Radiofréquences; Circuits pour micro-ondes; Microwave circuits; Radio frequency; Periodicals; Electronic journals; 621.3813
• DOI: 10.1155/2008/784526
• Languages: English
• ISSNs: 1687-5826

Abstract

Abstract : A novel design of a compact4 × 4 Butler matrix is presented. All the design is based on the use of a Lange coupler with certain geometrical characteristics. This matrix occupies only 20% of the size of the conventional Butler matrix at the same frequency (80% of compactness). To examine the performance of the proposed matrix, the Lange coupler and the Butler matrix were simulated using Momentum (ADS) and IE3D softwares. Simulation results of magnitude and phase show a good performance. Furthermore, a four-antenna array was also designed at 2.45 GHz and then connected to the matrix to form a beamforming antenna system. As a result, four orthogonal beams at− 45 ∘, − 15 ∘, 15 ∘, and45 ∘ are produced. This matrix is suitable for wireless application at ISM band of 2.45 GHz.