GSM/DCS/IMT-2000 Triple-Band Built-In Antenna for Wireless Terminals

Abstract

The development of electrically small antennas play an important role in rapidly growing mobile communication market. This paper presents a novel design technique of the triple-band small internal antenna which covers GSM/DCS/IMT-2000 bands. The proposed antenna consists of the double shorting posts, feed post, and the dual-crossed C-slot patch radiators. The high-frequency structure simulator simulation is employed for optimizing the design parameters, and the simulation results agree with the measured data. The IE3D simulation is also used to obtain the current distribution at the resonant frequencies. The maximum gains at the frequencies 950 and 1860 MHz are measured about 1.58 and 1.3 dBi, respectively. These positive antenna gains and triple-bands of the proposed antenna are very attractive features for GSM/DCS/IMT-2000 bands handset applications.