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. 09, 2001
Filed:
Sep. 01, 1999
Masayuki Miyaji, Takarazuka, JP;
Kaoru Ishida, Shijonawate, JP;
Hiroaki Kosugi, Hirakata, JP;
Shin'ichi Kugou, Yokosuka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
According to the configuration the present power splitter, it is possible to reduce the characteristic impedance of a transmission line constituting a directional coupler by setting the impedance of a first terminal pair constituted of an input port,and a second output port,of a 6-dB branch-line-shaped directional coupler,to a value smaller than a reference impedance Z,(50 &OHgr; in general) and setting the impedance of a second terminal pair constituted of an isolation port,and a first output port,of the directional coupler,to Z,. Therefore, it is possible to increase the number of splits and reduce loss, as compared with conventional cases.