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:
May. 15, 2007
Filed:
Mar. 29, 2004
Applicant:
LU Chen, Brooklyn, NY (US);
Inventor:
Lu Chen, Brooklyn, NY (US);
Assignee:
Scientific Components Corporation, Brooklyn, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P 3/08 (2006.01); H01P 5/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
A directional coupler for low frequencies that is small and can handle high power levels. The directional coupler includes a pair of circuit lines having an input port, an output port, a forward coupled port and a reverse coupled port. The circuit lines are located proximate to each other such that they are electromagnetically coupled. A low pass filter is connected to the forward coupled port. The low pass filter shifts the operating frequency of the directional coupler.