A Miniature Spiral Diversity Antenna System With High Overall Gain Coverage and Low SAR

Author

Sayem, Abu T M ; Khan, Sadia ; Ali, Mohammod

Author_Institution

Motorola, Inc., Libertyville, IL

Volume

8

fYear

2009

fDate

7/1/1905 12:00:00 AM

Firstpage

49

Lastpage

52

Abstract

A miniature spiral diversity antenna system operating at 1.85 GHz is proposed. Two 10 times 6.25 mm antennas were placed at two corners of a printed circuit board at a height of 7 mm from the ground plane. Each antenna achieves nearly 7% bandwidth within 6 dB return loss. The mutual coupling between the two antennas is less than 10 dB. The proposed diversity antenna scheme exhibits high overall gain performance in all three principal planes compared to a single antenna solution. Computed specific absorption rate (SAR) data against a specific anthropomorphic mannequin (SAM) phantom and a hand model show that the diversity antenna system induces low SAR compared to a single antenna.

Keywords

planar inverted-F antennas; spiral antennas; high overall gain coverage; mutual coupling; planar inverted-F antenna; printed circuit board; single antenna; specific absorption rate; specific anthropomorphic mannequin; spiral diversity antenna system; Antennas; diversity; planar inverted-F antenna (PIFA); specific absorption rate (SAR);

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

Conference_Location

12/16/2008 12:00:00 AM

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2008.2010961

Filename

4717232