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Cylindrical electronically scanned antenna

  • US 7,548,212 B2
  • Filed: 06/06/2007
  • Issued: 06/16/2009
  • Est. Priority Date: 06/06/2006
  • Status: Expired due to Fees
First Claim
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1. A cylindrical electronically scanned antenna, comprising:

  • a set of radiating guides arranged in cylinder form to produce an antenna beam;

    an array of 3 dB couplers in waveguide form having inputs and an outputs, the inputs of which are lit by a set of microwave feeds, the outputs of each coupler being coupled to the input of a radiating guide;

    an array of pairs of phase-shifting cells, each coupled to a 3 dB coupler, an incoming wave (E) from the microwave feeds being phase-shifted by a controllable phase shift (Δ

    φ

    ), the angular offset of the antenna beam being dependent on the phase shift (Δ

    φ

    ),wherein the microwave feeds are arranged on a cylindrical circumference inside the cylinder formed by the set of radiating guides so that each feed lights a part of the array of couplers, the microwave feeds being activated in turn.

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