Invention Grant
US08686741B2 Excessive noise ratio deriving device, noise figure deriving device, method, program, and recording medium
失效
噪声比导出装置，噪声系数导出装置，方法，程序和记录介质
- Patent Title: Excessive noise ratio deriving device, noise figure deriving device, method, program, and recording medium
- Patent Title (中): 噪声比导出装置，噪声系数导出装置，方法，程序和记录介质
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Application No.: US12994016Application Date: 2009-05-19
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Publication No.: US08686741B2Publication Date: 2014-04-01
- Inventor: Takeshi Nagasaka
- Applicant: Takeshi Nagasaka
- Applicant Address: JP Tokyo
- Assignee: Advantest Corporation
- Current Assignee: Advantest Corporation
- Current Assignee Address: JP Tokyo
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2008-139926 20080528
- International Application: PCT/JP2009/059491 WO 20090519
- International Announcement: WO2009/145127 WO 20091203
- Main IPC: G01R29/26
- IPC: G01R29/26 ; G06F15/00
Abstract:
A noise figure deriving device is provided to precisely obtain the noise figure (NF) of a receiver. The noise figure deriving device includes a first NF deriving unit that derives a first noise figure, which is a noise figure when a predetermined receiver-side pin pin1R is connected to a receiver, based on a ratio Y of one power to the other power of two types of reference noise. The noise figure deriving device also includes a second NF deriving unit that derives a second noise figure, which is a noise figure when receiver-side pins pin2R, pin3R, and pin4R are connected to the receiver, based on an inter-measurement-device-side-terminal difference and the first noise figure. The inter-measurement-device-side-terminal difference is a difference between the first noise figure and the second noise figure.
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