Compact Dual-Band Printed Quadrifilar Antennas for UHF RFID/GPS Operations

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 co...

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Veröffentlicht in:	IEEE antennas and wireless propagation letters 2011, Vol.10, p.804-807
Hauptverfasser:	Kyoung-Sub Oh, Wang-Ik Son, Sung-Yong Cha, Moon-Que Lee, Jong-Won Yu
Format:	Artikel
Sprache:	eng
Schlagworte:	Antenna radiation patterns Circular polarization Dual band dual-band antenna Frequency measurement Gain Global Positioning System Global Positioning System (GPS) Helical antennas printed quadrifilar antenna (PQA) Radiofrequency identification ultrahigh frequency radio frequency identification (UHF RFID)
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Beschreibung
Zusammenfassung:	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°.
ISSN:	1536-1225 1548-5757
DOI:	10.1109/LAWP.2011.2163610