Summary

International Symposium on Antennas and Propagation

2010

Session Number:3TB4

Session:

Number:3TB4-2

Bandwidth Enhancement of Two-element Diversity Antenna with Hybrid Coupler

Masato KOMATSU,  Hiroyuki ARAI,  

pp.-

Publication Date:2010/11/23

Online ISSN:2188-5079

DOI:10.34385/proc.52.3TB4-2

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Summary:
With the developments of mobile communications technology, an interest in built-in antenna has been increased in mobile terminal applications. The problems for the antenna size reduction are the decrease of the frequency bandwidth and efficiency. The use of parasitic elements and a parallel resonance with an added element are presented to enhance the bandwidth [1] [2], it is necessary to find the most suitable place to install into mobile terminals and improve depleted efficiency. This paper proposes two-element antenna a with hybrid coupler to expand the bandwidth. The hybrid coupler provides two output ports to give the diversity effect by in and out of phase excitation [3], then this proposed antenna also provides the diversity effect. Details of the design and analysis of the proposed antenna to obtain the bandwidth enhancement and diversity effect are described and are demonstrated experimentally by the prototype antenna.