A Low Profile Folded Inverted-L Antenna for T-DMB/UHF Handset Application

Seung Gil JEON  Won Sub KIM  Jae Hoon CHOI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E90-B   No.10   pp.2995-2998
Publication Date: 2007/10/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.10.2995
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Antennas and Propagation
Keyword: 
internal antenna,  multiband antenna,  T-DMB,  UHF,  DTV,  wideband antenna,  

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Summary: 
A novel low profile and dual-band antenna for terrestrial digital multimedia broadcasting (T-DMB) and ultra high frequency (UHF) applications is proposed in this paper. The proposed antenna consists of a folded inverted-L antenna and two open stubs. The designed low profile antenna occupies an antenna volume of 1484911 mm3. The length of the folded radiating element is about 0.09λ at the resonant frequency of T-DMB application (180-210 MHz). The parasitic open stubs are utilized to obtain the wide bandwidth (50%) for UHF application (470-740 MHz). The maximum gains at the frequencies of T-DMB and DTV applications were -5 and +5 dBi, respectively. The radiation patterns are near omni-directional at frequency of interest.