×

Variable directivity antenna and variable directivity antenna system using the antennas

  • US 20060050005A1
  • Filed: 04/01/2004
  • Published: 03/09/2006
  • Est. Priority Date: 04/02/2003
  • Status: Active Grant
First Claim
Patent Images

1. A variable directivity antenna comprising:

  • a first antenna group including first and second antennas for receiving a radio wave in a first frequency band, said first and second antennas being disposed in parallel with and spaced from each other by a distance less than a half of a wavelength in said first frequency band, said first and second antennas exhibiting an 8-shaped directivity along a line perpendicular to the length direction thereof; and

    phase shifting means for adjusting phases of received signals from said first and second antennas and combining the phase-adjusted signals in such a manner that the resultant signal selectively assumes a first directivity state in which said resultant signal exhibits a directivity in a first direction which is from said first antenna toward said second antenna, and a second directivity state in which said resultant signal exhibits a directivity in a second direction which is from said second antenna toward said first antenna.

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