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:
Sep. 01, 1998
Filed:
Mar. 11, 1996
Takayuki Katoh, Tokyo, JP;
Hiroto Matsubayashi, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A semiconductor element evaluating apparatus for evaluating an electrical characteristic of a semiconductor element used in a microwave band includes a pedestal having first and second waveguide parts for exchanging signals with external devices and penetrating the pedestal, a mode converting carrier member placed on the pedestal and having first and second waveguide parts and first and second microstrip lines sandwiching a region where a semiconductor element is to be mounted, and waveguide terminal structures placed on the mode converting carrier member. The first and second waveguide parts of the pedestal, the mode converting carrier member, and the terminal parts form first and second waveguides. One semiconductor element can be exchanged for another semiconductor element merely by exchanging one mode converting carrier member for another, and the length of the transmission line is shortened whereby transmission loss is reduced.