A novel antenna isolation method for mobile phone antennas

Author

Rowell, Corbett ; Lam, Edmund Y.

Author_Institution

Electr. & Electron. Eng. Dept., Univ. of Hong Kong, Hong Kong, China

fYear

2011

fDate

3-8 July 2011

Firstpage

1922

Lastpage

1925

Abstract

The behavior of a two element antenna system within a mobile phone where one antenna has a particular slot configuration, designed to reduce the mutual coupling of the two antennas at a particular frequency corresponding to the length of the slot and the ground and feed placement, is analyzed and measured. This particular set of antenna geometries can create a large group delay at certain frequencies, significantly increasing the isolation between the two antennas. A large group delay can reduce the mutual coupling between two antenna by over 25 dB compared to a non-optimized system. By reducing the mutual coupling, the radiation efficiency increases by 20-30%. This paper analyzes the two antenna system within a mobile phone where the first antenna is GSM + 3G and the second antenna is 4G where the 4G frequency band directly overlaps with the 3G frequency band.

Keywords

3G mobile communication; 4G mobile communication; cellular radio; mobile antennas; mobile handsets; slot antennas; 3G frequency band; 4G frequency band; GSM; antenna geometries; antenna isolation; mobile phone antennas; slot configuration; two element antenna system; Antenna feeds; Antenna measurements; Delay; Geometry; Slot antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (APSURSI), 2011 IEEE International Symposium on

Conference_Location

Spokane, WA

ISSN

1522-3965

Print_ISBN

978-1-4244-9562-7

Type

conf

DOI

10.1109/APS.2011.5996877

Filename

5996877