MEMS-based switched diversity antenna at 2.3 GHz for automotive applications

Author

Sievenpiper, D. ; Song, H.J. ; Hsu, H.P. ; Tangonan, G. ; Loo, R.Y. ; Schaffner, J.

Author_Institution

HRL Labs., Malibu, CA, USA

Volume

2

fYear

2002

fDate

27-30 Oct. 2002

Firstpage

762

Abstract

Our previous work is presented on diversity antenna experiments in the 2.3 GHz band, specifically for applications in the automotive environment. We describe the case of two-element position diversity, and we study the effects of the antenna positions on the amount of diversity gain. The presentation consists primarily of measurement data on a moving vehicle, with software post-processing to determine the effects of diversity combining. We present several diversity combining schemes, and describe a switched diversity circuit that we have built to address one of these schemes. An in-house developed SPDT MEMS switch, which has desirable insertion loss and isolation characteristics for the diversity switch, is shown. Also, a discussion on using a switch for the switched diversity antenna is included.

Keywords

UHF antennas; cellular radio; diversity reception; micromechanical devices; mobile antennas; multipath channels; switching circuits; telecommunication computing; 2.3 GHz; GSM frame structure; SPDT MEMS switch; UHF; antenna positions; automotive environment; diversity combining; diversity gain; insertion loss; isolation characteristics; multipath environment; software post-processing; switched diversity antenna; switched diversity circuit; two-element position diversity; Antenna measurements; Application software; Automotive applications; Automotive engineering; Diversity methods; Diversity reception; Software measurement; Switches; Switching circuits; Vehicles;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Personal Multimedia Communications, 2002. The 5th International Symposium on

ISSN

1347-6890

Print_ISBN

0-7803-7442-8

Type

conf

DOI

10.1109/WPMC.2002.1088278

Filename

1088278