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:
May. 14, 2013
Filed:
Dec. 09, 2009
Yukako Tsutsumi, Kanagawa-ken, JP;
Tetsu Shijo, Tokyo, JP;
Takayoshi Ito, Kanagawa-ken, JP;
Shuichi Obayashi, Kanagawa-ken, JP;
Hiroki Shoki, Tokyo, JP;
Yukako Tsutsumi, Kanagawa-ken, JP;
Tetsu Shijo, Tokyo, JP;
Takayoshi Ito, Kanagawa-ken, JP;
Shuichi Obayashi, Kanagawa-ken, JP;
Hiroki Shoki, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A transformer between a waveguide and a transmission-line includes a high-frequency circuit module, transmission-lines, a waveguide, and feed pins. The high-frequency circuit module has differential-pair terminals to input and output a differential signal. The transmission-lines are connected to the differential-pair terminals. The waveguide includes first to third metal walls. The feed pins are connected to the transmission-lines inside of the waveguide. The feed pins have a first distance of approximately (λg/2) from each other. One of the feed pins has a second distance of approximately (λg*(1+2α)/4) from the third metal plane. 'λg' is a wavelength in the waveguide and 'α' is an integer which is equal or larger than “0”. Each of the feed pins has a third distance of approximately (a/2) from the first or second wall. “a” is length of the waveguide along the third metal wall.