×

Wideband cylindrical UHF array

  • US 5,874,915 A
  • Filed: 08/08/1997
  • Issued: 02/23/1999
  • Est. Priority Date: 08/08/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. A wideband electronically scanned cylindrical array, comprising:

  • an array of end-fire radiating elements, the elements arranged in a first plurality of columns, the columns arranged radially about a center axis of the array;

    a beamforming network connected to the array of radiating elements, the beamforming network including;

    a power divider circuit for dividing an input RF drive signal into a second plurality of drive signals;

    a matrix of electronically controlled transfer switches;

    a true time delay network, comprising a third plurality of delay lines coupling respective ones of said drive signals to said matrix of transfer switches;

    a fourth plurality of transmit amplifiers coupled to said matrix of transfer switches, each amplifier for amplifying a respective one of the drive signals;

    apparatus for coupling said amplified drive signals to selected ones of said columns of radiating elements, said selected columns forming a fifth plurality of columns; and

    a beamforming controller connected to the coupling apparatus and the matrix of transfer switches for selecting sectors of said columns of radiating elements to be driven by said drive signals to form a desired beam.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×