Telecommunications – Carrier wave repeater or relay system
Reexamination Certificate
2007-02-13
2007-02-13
Nguyen, Duc M. (Department: 2618)
Telecommunications
Carrier wave repeater or relay system
C455S015000, C455S020000, C455S075000, C455S318000
Reexamination Certificate
active
10741446
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.
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Goto Yuichiro
Inoue Koji
Kegasa Koyo
Kusaka Takuya
Manabe Chitaka
A. Marquez, Esq. Juan Carlos
Fisher Esq. Stanley P.
Kabushiki Kaisha Kobe Seiko Sho
Nguyen Duc M.
Reed Smith LLP
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