A Study on Minimization of Requisite Design Volume of Small Antennas Inside Handset Terminals

Tuan Hung NGUYEN  Hiroshi SATO  Yoshio KOYANAGI  Hisashi MORISHITA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E97-B   No.11   pp.2395-2403
Publication Date: 2014/11/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E97.B.2395
Type of Manuscript: PAPER
Category: Antennas and Propagation
Keyword: 
requisite design volume,  space-saving design,  handset antenna,  inverted-F antenna,  

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Summary: 
This study presents a proposal for space-saving design of built-in antennas for handset terminals based on the concept of requisite design antenna volume. By investigating the relation between antenna input characteristic and electric near-field around the antenna element and surrounding components inside the terminal, and then evaluating the requisite design antenna volume, we propose the most effective deployment for both the antenna and surrounding components. The results show that our simple proposal can help reduced, by about 17% and 31.75%, the space that the antenna element actually requires at least for stable operation inside the terminal, in the single-band designs for the cellular 2GHz band (1920-2170MHz) and 800MHz band (830-880MHz), respectively. In the dual-band design, we verify that it can reduce, the antenna space by about 35.18%, and completely cover the two above cellular bands with good antenna performance.