Title :
Compact Dual-Band Printed Quadrifilar Antennas for UHF RFID/GPS Operations
Author :
Oh, Kyoung-Sub ; Son, Wang-Ik ; Cha, Sung-Yong ; Lee, Moon-Que ; Yu, Jong-Won
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea
fDate :
7/3/1905 12:00:00 AM
Abstract :
This letter presents a simple and innovative method for designing and optimizing two circularly polarized printed quadrifilar antennas (PQAs). The PQAs are operated at UHF RFID (902-908 MHz) and GPS (1575 MHz) and intended for use at a portable terminal. This new antenna system comprises two PQAs concentrically arranged, but electrically isolated. Each PQA comprises four inverted-F monopoles arranged orthogonally and excited with a phase difference of 90°.
Keywords :
Global Positioning System; UHF antennas; microstrip antennas; monopole antennas; multifrequency antennas; planar inverted-F antennas; radiofrequency identification; PQA; UHF GPS operations; UHF RFID operations; antenna system; circularly polarized printed quadrifilar antennas; compact dual-band printed quadrifilar antennas; frequency 1575 MHz; frequency 902 MHz to 908 MHz; inverted-F monopoles; phase difference; portable terminal; Antenna radiation patterns; Dual band; Frequency measurement; Gain; Global Positioning System; Helical antennas; Radiofrequency identification; Circular polarization; Global Positioning System (GPS); dual-band antenna; printed quadrifilar antenna (PQA); ultrahigh frequency radio frequency identification (UHF RFID);
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2011.2163610
