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1.发明授权Apparatus for use in measuring phase dispersion produced by apparatus or a system 失效用于测量装置或系统产生的相分散的装置
公开(公告)号：US3706931A
公开(公告)日：1972-12-19
申请号：US3706931D
申请日：1971-04-01
Applicant: BELL TELEPHONE LABOR INC
Inventor： SUBRAMANIAN MAHADEVAN
IPC: H04B3/46
CPC classification number: H04B3/462
Abstract: First and second waves at distinct frequencies are mixed to produce a third wave at their difference frequency. The phase difference between this third wave and a wave at the same frequency from a local oscillator is then detected to produce an output which is directly related to the phaseal relationship between the first and second waves.
Abstract translation: 将不同频率的第一和第二波混合以产生其差频时的第三波。 然后检测该第三波与来自本地振荡器的相同频率的波之间的相位差，以产生与第一和第二波之间的相位关系直接相关的输出。
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公开(公告)号：US3540829A
公开(公告)日：1970-11-17
申请号：US3540829D
申请日：1968-09-09
Applicant: BELL TELEPHONE LABOR INC
Inventor： COLLINSON JAMES A , COOK JOHN S , SUBRAMANIAN MAHADEVAN
CPC classification number: G01S17/95 , G01W2001/003 , Y02A90/19
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