Yagi-Uda antenna human proximity effects on the link budget at 300 MHz

Author

Palantei, Elyas ; Thiel, David V.

Author_Institution

Electr. Eng. Dept., Hasanuddin Univ., Makassar, Indonesia

fYear

2009

fDate

1-5 June 2009

Firstpage

1

Lastpage

4

Abstract

Yagi-Uda antennas are commonly used for data communications. Link budgets are calculated to ensure adequate fade margin. The presence of adjacent conducting material can affect antenna gain and impedance matching. Numerical modeling demonstrates that the gain of a 12 element Yagi-Uda is degraded by more than 2 dB when a human model is located in close proximity to the rear of the antenna. There are similar impedance matching losses. This has a significant effect on link reliability in RFID and wireless sensor networks where power is restricted.

Keywords

Yagi antenna arrays; data communication; radiofrequency identification; wireless sensor networks; 12 element Yagi-Uda; RFID; Yagi-Uda antenna human proximity effects; data communications; fade margin; frequency 300 MHz; impedance matching; link budget; link reliability; numerical modeling; wireless sensor networks; Biological system modeling; Data communication; Data engineering; Degradation; Directive antennas; Humans; Impedance; Proximity effect; Radiofrequency identification; Receiving antennas; Yagi-Uda antenna; human exposure; link budget; proximity effect;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2009. APSURSI '09. IEEE

Conference_Location

Charleston, SC

ISSN

1522-3965

Print_ISBN

978-1-4244-3647-7

Type

conf

DOI

10.1109/APS.2009.5172363

Filename

5172363