The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2009
Filed:
Dec. 07, 2005
Won-kyu Choi, Gyeonggi-do, KR;
Hae-won Son, Daejeon, KR;
Je-hoon Yun, Daejeon, KR;
Ji-hoon Bae, Daejeon, KR;
Cheol-sig Pyo, Daejeon, KR;
Jong-suk Chae, Daejeon, KR;
Won-Kyu Choi, Gyeonggi-do, KR;
Hae-Won Son, Daejeon, KR;
Je-Hoon Yun, Daejeon, KR;
Ji-Hoon Bae, Daejeon, KR;
Cheol-Sig Pyo, Daejeon, KR;
Jong-Suk Chae, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
Provided is a planar inverted-F antenna (PIFA) which has a Co-Planar Waveguide (CPW) feeding structure and can be attached to a metal surface, and an RFID tag using the same. The PIFA includes a radiation patch layer; a Co-Planar Waveguide (CPW) feeding layer; a feeding probe; and a short-circuit. The CPW feeding layer includes a feeding means and a ground surface. The feeding probe electrically connects the radiation patch layer and the feeding means and provides a Radio Frequency (RF) signal to be radiated to the radiation patch layer. The short-circuiting means short-circuits the radiation patch layer and the ground surface through the dielectric layer. The PIFA can be applied to a passive RFID tag. Impedance matching between the antenna and the RFID chip is possible. Also, the PIFA can easily control resonant frequency of the antenna and reactance.