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. 05, 2005
Filed:
Jun. 20, 2001
Applicants:
Yoshihisa Amano, Nara, JP;
Atsushi Yamada, Tenri, JP;
Inventors:
Yoshihisa Amano, Nara, JP;
Atsushi Yamada, Tenri, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01P001/203 ;
U.S. Cl.
CPC ...
Abstract
In a distributed constant filter, two λ/2 open line resonator are capacitive-coupled by an electromagnetic field coupling portion, and an input terminal and an output terminal are brought into mutual inductive coupling by an electromagnetic field coupling portion. The frequency of an attenuation pole can be close to a center frequency and the steepness of the filter characteristics can be increased.