Title :
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
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;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2009. APSURSI '09. IEEE
Conference_Location :
Charleston, SC
Print_ISBN :
978-1-4244-3647-7
DOI :
10.1109/APS.2009.5172363
