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. 29, 1995
Filed:
Jun. 07, 1994
Seiichi Banba, Kyoto, JP;
Abstract
In a quarter-wavelength coupled line type directional coupler including a first dielectric layer having first and second surfaces parallel to each other, a ground plane conductor is formed on the first surface of the first dielectric layer, and two coupled microstrip conductors each having a quarter wavelength are formed on the second surface of the first dielectric layer, arranging close to each other so as to be electromagnetically coupled with each other. Further, a second dielectric layer is formed on the second surface of the first dielectric layer, on which the coupled microstrip conductors are formed, and a floating potential conductor is formed on the second dielectric layer, arranging close to the microstrip conductors so as to be electromagnetically coupled with the coupled microstrip conductors. Then a cut portion is formed in the ground plane conductor so that the ground plane conductor is separated apart from the coupled microstrip conductors by a predetermined distance.