Title :
Radiation efficiency improvement method of RFID tag antenna for metallic objects printed on lossy substrate
Author :
Son, Hae-Won ; Choi, Won-kyu ; Choi, Gil-young
Author_Institution :
Div. of Electron.&Inf. Eng., Chonbuk Nat. Univ., Jeonju
Abstract :
This paper proposes a novel design method of RFID tag antenna on metallic surfaces using a lossy substrate such as FR4. The proposed design reduces the substrate loss and improves the radiation efficiency more than double compared with a conventional PIFA (planar inverted-F antenna). The antenna can be directly matched to the typical high-Q impedance of a tag chip, which consists of small resistance and large capacitive reactance.
Keywords :
absorbing media; antenna radiation patterns; planar inverted-F antennas; radiofrequency identification; PIFA; RFID tag antenna; capacitive reactance; lossy substrate; metallic objects; radiation efficiency; Admittance; Capacitors; Dielectric losses; Dielectric substrates; Equivalent circuits; Feeds; Impedance; Log periodic antennas; RFID tags; Transmission lines;
Conference_Titel :
Microwave Conference, 2008. APMC 2008. Asia-Pacific
Conference_Location :
Macau
Print_ISBN :
978-1-4244-2641-6
Electronic_ISBN :
978-1-4244-2642-3
DOI :
10.1109/APMC.2008.4958392
