Isolation improvement method for mobile terminal antennas at lower UHF band

Author

Ilvonen, J. ; Kivekäs, O. ; Azremi, A.A.H. ; Valkonen, R. ; Holopainen, J. ; Vainikainen, P.

Author_Institution

Sch. of Electr. Eng., Dept. of Radio Sci. & Eng., Aalto Univ., Aalto, Finland

fYear

2011

fDate

11-15 April 2011

Firstpage

1238

Lastpage

1242

Abstract

A novel method to improve the isolation between antenna elements on a mobile terminal at the 900-MHz frequency band is introduced. The characteristics of dual-antenna systems have been studied by simulations. The purpose is to use a combination of balanced and unbalanced antenna structures. In addition, the diversity performance in three different radio propagation environments is investigated. It is shown that the proposed structures can achieve up to 100 dB port-to-port isolation and the effective diversity gain of 10 dB in an urban propagation environment.

Keywords

UHF antennas; diversity reception; mobile antennas; multifrequency antennas; antenna elements; balanced antenna structures; diversity performance; dual-antenna systems; frequency 900 MHz; isolation improvement method; lower UHF band; mobile terminal antennas; unbalanced antenna structures; urban propagation; Bandwidth; Couplings; Helical antennas; Mobile antennas; Mobile communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (EUCAP), Proceedings of the 5th European Conference on

Conference_Location

Rome

Print_ISBN

978-1-4577-0250-1

Type

conf

Filename

5781730