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:
Oct. 06, 2015
Filed:
May. 16, 2011
Applicants:
Woo Yong Lee, San Diego, CA (US);
Cheng Jung Lee, Santa Clara, CA (US);
Inventors:
Woo Yong Lee, San Diego, CA (US);
Cheng Jung Lee, Santa Clara, CA (US);
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 7/005 (2006.01); H04B 1/48 (2006.01); H01P 1/213 (2006.01); H03H 7/46 (2006.01); H03H 9/70 (2006.01); H03H 9/72 (2006.01); H04B 1/525 (2015.01);
U.S. Cl.
CPC ...
H04B 1/48 (2013.01); H01P 1/2135 (2013.01); H03H 7/463 (2013.01); H03H 9/706 (2013.01); H03H 9/725 (2013.01); H04B 1/525 (2013.01);
Abstract
A system includes a transmit filter () in a transmit path to couple to an antenna () and pass signals in a transmit band. A receive filter () is disposed in a receive path to couple to the antenna and to the transmit filter to pass signals in a receive band different from the transmit band. An enhanced frequency variable impedance () is used to provide isolation between signals in the transmit and receive bands on the receive path. A phase and magnitude controlled feedback path can also be used to cancel transmit signals in the receive path.