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:
Dec. 24, 1991
Filed:
Aug. 03, 1990
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P / ;
U.S. Cl.
CPC ...
333 34 ; 333161 ; 333247 ;
Abstract
In a matching circuit for a high-frequency transistor, using a microstrip line for the main line and having a high-frequency transistor side main line shaped in a taper form, a thin-film capacitor and a grounding circuit are disposed between the taper part and the ground. The length of the parts of the thin-film capacitor is different in the signal traveling directions or the shape of the grounding circuit is different so that the impedance is matched at the output position of the thin-film capacitor part, while the spatial phase difference of high-frequency signals can be compensated at the same time.