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:
Nov. 05, 2002
Filed:
May. 12, 2000
Applicant:
Inventors:
Hirofumi Miyamoto, Kanazawa, JP;
Kikuo Tsunoda, Osaka-fu, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P 1/213 ; H01P 1/205 ;
U.S. Cl.
CPC ...
H01P 1/213 ; H01P 1/205 ;
Abstract
A dielectric filter includes a dielectric block and an outer conductor on outer surfaces of the dielectric block. The dielectric block has holes having inner conductors, with gaps provided by sections devoid of inner conductor. A section devoid of outer conductor is formed on an edge portion around a stray surface of the dielectric block. Accordingly, a TE-mode resonance having one quarter the wavelength in the axial length direction of the dielectric block is generated. The TE-mode resonance and a TEM-mode resonance are combined to form an attenuation pole.