A novel Butler matrix feeding system for BST multi-band antennas

Abstract

In this article a novel feeding system for BST Multiband Antennas is presented. This system is based on a 4×4 Butler matrix that uses a novel triple band hybrid. This hybrid operates on GSM900, DCS1800 and UMTS2100 bands. The presented novel implementation technique in the triple band hybrid can also be used in other application. The Butler matrix network is fabricated on FR4 substrate and the simulated and measured results are presented.