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Phased array transmission device

  • US 9,225,411 B2
  • Filed: 03/12/2014
  • Issued: 12/29/2015
  • Est. Priority Date: 03/14/2013
  • Status: Active Grant
First Claim
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1. A phased array transmission device, comprising:

  • an N (N≧

    3) number of transmission branches including a first transmission branch and a second transmission branch, the second transmission branch being adjacent to the first transmission branch, each having;

    a transmitter which transmits a transmission signal at a radio frequency;

    a phase adjuster which adjusts a phase of the transmission signal;

    an amplitude adjuster which adjusts an amplitude of the transmission signal; and

    a transmission output detector which extracts a part of an output of the transmitter;

    an (N−

    1) number of inter-branch error detectors, which detect relative errors between adjacent transmission branches, each including;

    a signal combiner which combines outputs of the transmission output detectors of the adjacent transmission branches with each other;

    a detector which detects a level of an output of the signal combiner; and

    an AD converter which converts an analog voltage from the detector into a digital value;

    a correction controller which detects phases and amplitudes of the transmission branches according to outputs from the inter-branch error detectors;

    a phase controller which controls the phase adjuster based on a result of phase detection by the correction controller; and

    an amplitude controller which controls the amplitude adjuster based on a result of amplitude detection by the correction controller.

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