Adaptive matching circuitry for compensation of finger effect on handset antennas

Author

Ramachandran, Prasadh ; Milosavljevic, Zlatoljub D. ; Beckman, Claes

Author_Institution

Pulse Finland Oy, Kempele

fYear

2009

fDate

23-27 March 2009

Firstpage

801

Lastpage

804

Abstract

In this paper we present and evaluate the effect of hand on terminal antenna and discuss a method to compensate for the mismatch. A dual band PIFA was used in this study. The presence of the hand was observed to cause 2-6 dB loss in efficiency in low-band and 2-4 dB loss in highband. In this study we propose a dynamic antenna matching (DAM) technique to improve matching level that can improve the total efficiency of the antenna by 2 - 4 dB compared to the mismatched case.

Keywords

impedance matching; mobile antennas; mobile handsets; multifrequency antennas; planar inverted-F antennas; adaptive matching circuitry; dual-band PIFA; dynamic antenna matching technique; finger effect compensation; handset antennas; loss 2 dB to 6 dB; planar inverted-F antennas; terminal antenna; Adaptive arrays; Fingers; Impedance; Loaded antennas; Mobile antennas; Performance loss; Pulse circuits; Pulse measurements; Radio frequency; Telephone sets; Dynamic Antenna Match; Mismatch; Terminal Antenna; Total Efficiency;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation, 2009. EuCAP 2009. 3rd European Conference on

Conference_Location

Berlin

Print_ISBN

978-1-4244-4753-4

Electronic_ISBN

978-3-00-024573-2

Type

conf

Filename

5067739