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:
Aug. 30, 1988
Filed:
Jul. 17, 1987
Applicant:
Inventors:
Izumi Kawakami, Tokyo, JP;
Tomokazu Komazaki, Tokyo, JP;
Katuhiko Gunzi, Tokyo, JP;
Norio Onisi, Tokyo, JP;
Assignee:
OKI Electric Industry Co., Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P / ; H01P / ; H01P / ;
U.S. Cl.
CPC ...
333202 ; 333206 ; 333207 ; 333222 ; 333223 ;
Abstract
A microwave filter comprising a rectangular ceramics block (30) having a plurality of elongated parallel holes (31-36) extending from the top surface to the bottom surface thereof. The holes are plated with conductive layers (37, 38), and flat conductive areas (39-44) coupled with the layers (37, 38) spatially disposed on the top surface of the dielectric block (30) surround opening ends of the holes (31-36). An input terminal and an output terminal are provided adjacent to the conductive areas (39, 44) at both the extreme sides of the dielectric block (30).