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Array antenna apparatus

  • US 9,088,325 B2
  • Filed: 02/01/2013
  • Issued: 07/21/2015
  • Est. Priority Date: 05/11/2012
  • Status: Expired due to Fees
First Claim
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1. An active phased array antenna apparatus comprising:

  • a plurality of antenna elements arranged in an array pattern;

    a plurality of reception circuits corresponding to the respective antenna elements;

    a plurality of phase shifters provided correspondingly to the reception circuits and controls phase of a signal output from the reception circuits to desired phase;

    a vacuum vessel houses the plurality of reception circuits and insulates external heat to maintain an extremely-low temperature state;

    a cooling unit cools the plurality of the reception circuits in the vacuum vessel;

    wherein each of the reception circuits comprising;

    a reception filter passes a reception signal, out of signals received by the corresponding antenna elements, which falls within a desired frequency band; and

    a low-noise amplifier (LNA) amplifies a reception signal having passed through the reception filter with low noise;

    the reception filter and a connecting wire between the reception filter and the low-noise amplifier are formed with superconducting materials achieve a superconducting phase by cooling of the cooling unit;

    a noncontact waveguide loaded with a dielectric body is used for at least one electrical (high frequency) interface to connect an input signal and an output signal between extremely-low temperature side inside of the vacuum vessel and normal temperature side outside of the vacuum vessel; and

    an airtight structure of the vacuum vessel is formed with the dielectric body.

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