Real-time phase synchronization of a remote receiver with a measurement instrument

    公开(公告)号:US09860054B1

    公开(公告)日:2018-01-02

    申请号:US15351291

    申请日:2016-11-14

    Abstract: A measurement instrument for measuring electrical characteristics of a device under test (DUT) includes a synchronization signal generator for generating a synchronization signal transmittable to a receiver, a voltage controlled phase shifter (VCPS) connected with the synchronization signal generator and a phase-to-voltage converter configured to drive the VCPS. The synchronization signal is transmitted via a duplexer configured to transmit the synchronization signal from the measurement instrument to the receiver via a fiber optic cable and retransmit the received synchronization signal from the receiver to the measurement instrument via the fiber optic cable. The phase-to-voltage converter receives as inputs the synchronization signal input to the VCPS, the synchronization signal output from the VCPS and the retransmitted synchronization signal received at the measurement instrument from the receiver. An output of the phase-to-voltage converter is provided as input to the VCPS.

    ELECTRIC FIELD INTENSITY DISTRIBUTION MEASUREMENT DEVICE AND ELECTRIC FIELD INTENSITY DISTRIBUTION MEASUREMENT METHOD

    公开(公告)号:US20170279544A1

    公开(公告)日:2017-09-28

    申请号:US15467400

    申请日:2017-03-23

    Inventor: Hanako Noda

    Abstract: An electric field intensity distribution measurement device 1 that measures, in a near field, a radio signal transmitted from an antenna 110 including a plurality of antenna elements T1 to TN integrated into a transmission device 100 includes a measurement antenna 11 that receives the radio signal as a measurement signal at a plurality of scanning points included in a predetermined scanning range, a reference antenna 12 that receives the radio signal as a reference signal, a phase difference and amplitude calculation unit 16 that calculates a phase difference between a measurement signal and a reference signal with respect to each scanning point, and an amplitude of the measurement signal, and a far-field electric field intensity distribution calculation unit 17 that calculates an electric field intensity distribution in a far field using information on the phase difference and the amplitude calculated by the phase difference and amplitude calculation unit 16.

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