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:
Feb. 25, 2003
Filed:
Mar. 31, 2000
Applicant:
Inventor:
Kuniyoshi Nakada, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01P 1/18 ;
U.S. Cl.
CPC ...
H01P 1/18 ;
Abstract
A variable phase circuit for microwave and millimeter wave applications includes a distributed-constant transmission line, a number of phase shifters respectively responsive to control signals for introducing a desired amount of phase shift to and removing the introduced phase shift from the transmission line. In order to compensate for the frequency-dependent phase deviation of each phase shifter, one or more loading stubs are selectively connected to or disconnected from the transmission line according to operation of the phase shifters.