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

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...

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Bibliographic Details
Main Authors: Palantei, E., Thiel, D.V.
Format: Conference Proceeding
Language:English
Subjects:
Biological system modeling
Data communication
Data engineering
Degradation
Directive antennas
human exposure
Humans
Impedance
link budget
Proximity effect
Radiofrequency identification
Receiving antennas
Yagi-Uda antenna
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Summary: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.
ISSN:1522-3965
1947-1491
DOI:10.1109/APS.2009.5172363