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:
Feb. 13, 2007
Filed:
Dec. 22, 2003
Koyo Kegasa, Kobe, JP;
Chitaka Manabe, Kobe, JP;
Takuya Kusaka, Kobe, JP;
Yuichiro Goto, Kobe, JP;
Koji Inoue, Kobe, JP;
Koyo Kegasa, Kobe, JP;
Chitaka Manabe, Kobe, JP;
Takuya Kusaka, Kobe, JP;
Yuichiro Goto, Kobe, JP;
Koji Inoue, Kobe, JP;
Kabushiki Kaisha Kobe Seiko Sho, Hyogo, JP;
Abstract
In a frequency converter, a phase-locked loop generates a local-oscillation signal having a low frequency, of a plurality of local-oscillation signals having different frequencies, based on an intermediate frequency beacon signal that results from mixing a predetermined beacon signal with the local-oscillation frequency signal. Even if the phase-locked loop is used to generate the low frequency local-oscillation signal only, a frequency offset and a phase noise taking place in remaining high frequency local-oscillation signals are compensated for or canceled out. The frequency converter thus results in a high frequency accuracy. This arrangement reduces the number of bulky, costly and power-consuming phase-locked oscillators, typically used in the quasi millimeter band or the millimeter band. A simplified, compact frequency converter is thus provided, reducing both installation and operating costs.