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Internal Broadband Antennas for Digital Television Receiver in Mobile Terminals

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4 Author(s)
Holopainen, J. ; Sch. of Sci. & Technol., Dept. of Radio Sci. & Eng., Aalto Univ., Aalto, Finland ; Kivekas, Outi ; Icheln, C. ; Vainikainen, P.

The Implementation of internal broadband antennas for digital television receiver (DTV) in mobile terminals operating at the lower UHF band is studied comprehensively. Certain challenges such as inherently narrow impedance bandwidth of electrically small antennas and limited volume available for the antennas inside mobile terminals are identified and handled. The proposed design principle for DTV antennas is to decrease the total efficiency of the antenna to a level which is just good enough to ensure a sufficient signal-to-noise ratio and that way make the size of the antenna sufficiently small. The limits for the size of broadband capacitive coupling element-based DTV antenna structures inside handsets of different sizes are studied. In the end, a manufactured prototype and simulated design are presented and compared with the limits studied earlier in the paper. The results show that the studied antenna concept is a promising candidate for broadband DTV antennas in mobile terminals. The work also increases general understanding on the implementation of antennas based on the radiation of the finite ground plane.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:58 ,  Issue: 10 )

Date of Publication:

Oct. 2010

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