Title :
Compact oscillator-type active antenna for UHF RFID reader
Author_Institution :
Dept. of Radio Mobile Commun. Eng., Honam Univ., Gwangju
Abstract :
A diamond-shaped microstrip ring patch, as a radiator of an oscillator-type active antenna, is proposed for easier impedance matching, smaller patch size, and circular polarisation. The active antenna has been built and measured. The fabricated antenna including the active circuitry has a size about 65% of that using a regular-size square microstrip antenna. Test results show potential possibilities for use as a transmitter of an RFID reader around 915 MHz
Keywords :
UHF antennas; active antennas; antenna radiation patterns; impedance matching; microstrip antennas; radio transmitters; radiofrequency identification; UHF RFID reader; active circuitry; circular polarization; compact active antenna; impedance matching; microstrip ring patch; oscillator-type active antenna; small patch size; transmitter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20070072
