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:
Apr. 07, 1981
Filed:
Jul. 05, 1979
Applicant:
Inventors:
Kiichi Nakamura, Yachiyo, JP;
Takashi Iwata, Shonan, JP;
Assignee:
TDK Electronics Co., Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P / ; H01P / ;
U.S. Cl.
CPC ...
333 / ; 338315 ; 338333 ;
Abstract
A fixed attenuator for microwave band comprising of a dielectric substrate, with a resistance film and a conductor film attached on said substrate so as to form an attenuation circuit. The substrate further comprises of at least one hole provided through the dielectric substrate. The attenuator is mounted on a metallic board or a printed circuit board by a screw inserted in said hole. Thus, the cooling effect of the resistance film has been improved while keeping the low manufacturing cost and stable structure, by fixing the dielectric substrate on a metallic board by screws inserted in the mentioned holes.