Abstract
A compact meandered cross-shaped slot circularly polarized antenna for ultra high frequency (UHF) band radio frequency identification (RFID) reader applications is presented. Circularly polarized radiation is realized by introducing a slot on the diagonal axis of a square patch. Four different slot shapes are entrenched on one of the diagonal axes of the square patch for circularly polarized radiation and compared to the fixed overall volume of the antenna. The overall size of the antenna is reduced by increasing the perimeter of a slot within one quadrant of the patch. The meandered cross-shaped slot circularly polarized antenna is compact when compared with circular-, square- and cross-shaped slot circularly polarized antennas. Diagonally symmetric two- and four-meandered cross-shaped slot antennas are studied for further size miniaturization. Measured 3 dB axial ratio bandwidth of around 6 MHz with more than 2 dBic boresight gain and 10-dB reflection coefficient of 22 MHz is obtained with circularly polarized meandered cross-shaped four slot antenna. Size of the antenna is 0.189 λ0 × 0.189 λ0, where λ0 is the operating wavelength at 915 MHz.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: AEU - International Journal of Electronics and Communications
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
