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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.:

US 5905409 B1

PDFFull Text
Date of Patent:
May. 18, 1999

Filed:

Oct. 03, 1997

Microwave and millimeter wave circuit including amplifier and band

Applicant:
Inventors:

Shinichi Fujimoto, Tokyo, JP;

Takuo Kashiwa, Tokyo, JP;

Assignee:

Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;

Attorney:

Leydig, Voit & Mayer

Primary Examiner:

Robert Pascal

Assistant Examiner:

Patricia Nguyen

Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330302 ; 330306 ;
Abstract

A microwave and millimeter wave circuit includes an amplifier having an amplification center frequency, input and output terminals, and a source-grounded transistor. First and second transmission lines are connected between the input terminal and a gate of the transistor, and are connected in series to each other. Third and fourth transmission lines are connected between a drain of the transistor and the output terminal, and are connected in series to each other. A first band elimination filter is connected to the input terminal, and has a first stopping frequency, and a second band elmination filter is connected to the output terminal, and has a second stopping frequency. A third band elimination filter is connected to a connecting point between the first and second transmission lines and has a third stopping frequency, and a fourth band elimination filter is connected to a connecting point between the third and fourth transmission lines and has a fourth stopping frequency. Each of the first to fourth stopping frequencies is lower than the amplification center frequency, and each of the third and fourth stopping frequencies is higher than the first and second stopping frequencies.

Find Patent Forward Citations

Fujimoto, Shinichi. (1999). Microwave and millimeter wave circuit including amplifier and band (U.S. Patent No. 5905409). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5905409

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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