Development of Multi-Broadband Planar Wire Antennas for Wireless Applications

摘要

A new type of multi-broadband antennas is developed for wireless applications. The broadband performance of this type of antennas is achieved by introducing a small gap on a wire loop while the multi-band operation is realized by simultaneously exciting one or more additional wire elements. Three antenna configurations are investigated for single-, dual-, and triple-broadband operations. The dual-broadband operation is obtained by employing a combination of a loop and a monopole. The triple-broadband antenna consists of a loop, a mono-pole, and an inverted-L structure. It is demonstrated that the multi-broadband antennas can achieve a bandwidth of 30% in the 1 GHz band, 50% in the 2 GHz band, and 40% in the 5 GHz band, which cover the frequency bands for AMPS/PCS, GSM/DCS, PDC/PHS, and IMT-2000 mobile communications as well as for 2.4-GHz and 5-GHz wireless applications.