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:
Nov. 08, 2011
Filed:
Dec. 04, 2008
Donghan Lee, Daejeon, KR;
Ji-hoon Bae, Daejeon, KR;
Cheng-hao Quan, Daejeon, CN;
Kwang-soo Cho, Daejeon, KR;
Gil Young Choi, Daejeon, KR;
Jong-suk Chae, Daejeon, KR;
Sang-gi Kang, Daejeon, KR;
Donghan Lee, Daejeon, KR;
Ji-Hoon Bae, Daejeon, KR;
Cheng-Hao Quan, Daejeon, CN;
Kwang-Soo Cho, Daejeon, KR;
Gil Young Choi, Daejeon, KR;
Jong-Suk Chae, Daejeon, KR;
Sang-Gi Kang, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
A method and apparatus for suppressing a transmit leakage signal of a radio frequency identification (RFID) reader is provided. The apparatus includes: a first power distributor distributing a transmission signal to output a first transmission signal and a second transmission signal; a second power distributor distributing the second transmission signal to output a third transmission signal and a fourth transmission signal; a first amplitude/phase converter converting an amplitude and a phase of the first transmission signal to generate a first converted signal; a second amplitude/phase converter converting an amplitude and a phase of the third transmission signal to generate a second converted signal; a first power combiner combining the first converted signal with a first leakage signal generated in association with the fourth transmission signal; and a second power combiner combining the second converted signal with a second leakage signal generated in association with the fourth transmission signal.