Tuning the band-stop filter effect in mobile phone antennas

Author

Rowell, Corbett ; Lam, Edmund Y.

fYear

2012

fDate

8-14 July 2012

Firstpage

1

Lastpage

2

Abstract

A slot placed between the feed and the ground connections of a single shorted microstrip antenna (PIFA) in a two antenna system can produce a band-stop filter effect in one of the frequency bands where both antennas radiate at the same frequency, but have very high isolation. The slot forms a band-stop filter, creating a large group delay at certain frequencies at a particular anti-resonance frequency. This paper analyzes methods to tune the band-stop filter effect by adjusting the slot width and additional ground connections. The antenna geometry analyzed is similar to a two antenna system inside a mobile device where the first antenna with slots has both lower band and high band resonances (quad-band GSM or dual-band LTE) and the second antenna is a wide-band single frequency antenna at LTE/3G/WiMAX.

Keywords

3G mobile communication; Long Term Evolution; WiMax; antenna feeds; antenna radiation patterns; band-stop filters; microstrip antenna arrays; mobile antennas; mobile handsets; LTE-3G-WiMAX; antenna geometry; antenna radiation; antenna system; antiresonance frequency; band-stop filter effect; dual-band LTE; feed connection; frequency bands; ground connection; group delay; mobile device; mobile phone antennas; quad-band GSM; single-shorted microstrip antenna; slot width; wide-band single-frequency antenna; Antenna feeds; Antenna measurements; Microstrip antennas; Mobile antennas; Slot antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE

Conference_Location

Chicago, IL

ISSN

1522-3965

Print_ISBN

978-1-4673-0461-0

Type

conf

DOI

10.1109/APS.2012.6348017

Filename

6348017