Design of a multi-band internal antenna using an open stub

摘要

An internal antenna for GSM (880/spl sim/920MHz), DCS (1710/spl sim/1880MHz), and US-PCS (1850/spl sim/1990MHz) mobile handset is proposed. The antenna is designed to have a multi-band operation and includes feed line, patch and matching stub. It has a single radiating element and operates in multi-band by a matching circuit. The measured peak gain is 0.11dBi, 1.65dBi and 0.13dBi for GSM, DCS, and US-PCS, respectively.