Octafilar Helical Antenna for Portable UHF-RFID Reader

Saber H., Hend A., Kamal H.
2011 International Journal of Radio Frequency Identification & Wireless Sensor Networks  
Octafilar helical antenna (OFHA) is proposed for handheld ultra-high-frequency (UHF) radio frequency identification (RFID) reader. The investigated antenna configuration consists of OFHA placed on reader device in the presence of human hand model. The antenna is designed at UHF band centered at 915 MHz. The antenna return loss, axial ratio, gain, co-polarized and crosspolarized field components are calculated using the finite element method (FEM) and compared with that calculated by finite
more » ... ration technique (FIT) for verification of the simulated results. A comparison between the performance of the quadrifilar helical antenna (QFHA) and the octafiliar helical antenna (OFHA) designed at 915 MHz in the presence of the reader device and human hand model is investigated. The OFHA introduces high gain, high front to back ratio, good axial ratio and omnidirectional coverage.
doi:10.5772/10689 fatcat:q3reki67ofdmfapqfth4tevg4a