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. 12, 2014
Filed:
Jan. 28, 2010
Yosuke Otake, Mitaka, JP;
Yoshihisa Soutome, Tokyo, JP;
Yukio Kaneko, Kawaguchi, JP;
Yoshitaka Bito, Kokubunji, JP;
Hisaaki Ochi, Kodaira, JP;
Koji Hirata, Kasukabe, JP;
Yosuke Otake, Mitaka, JP;
Yoshihisa Soutome, Tokyo, JP;
Yukio Kaneko, Kawaguchi, JP;
Yoshitaka Bito, Kokubunji, JP;
Hisaaki Ochi, Kodaira, JP;
Koji Hirata, Kasukabe, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention provides a technique for maintaining a function for effectively blocking common mode noise with a simple configuration, even in the case where unbalance occurs in characteristic impedance of a coaxial cable in an MRI apparatus, and improving the performance of an RF coil. In a circuit where a balun is established by parallel connection with the coaxial cable, multiple serial resonance circuits having different resonance frequencies are connected in parallel. A value of each constitutional element of each of the serial resonance circuits is adjusted in such a manner that the frequency for blocking the common mode noise of the entire balun falls into a range between the resonance frequencies of these serial resonance circuits.