×

Patch antenna assembly

  • US 5,633,645 A
  • Filed: 08/29/1995
  • Issued: 05/27/1997
  • Est. Priority Date: 08/30/1994
  • Status: Expired due to Fees
First Claim
Patent Images

1. A laminar patch antenna comprising a ground plane element having opposing first and second faces, a first dielectric planar member adjacent the first face of the ground plane element, a patch radiator on a face of the first dielectric member remote from the ground plane element, a second dielectric planar member adjacent the second face of the ground plane element, and a transmission line circuit for feeding the antenna, which circuit is located on a face of the second dielectric member remote from the ground plane element, said ground plane element having a cross-shaped aperture formed by two intersecting slots to couple the transmission line circuit to the patch radiator, and said transmission line circuit comprising at least three linear conductors joined end to end at a junction overlying a centre of said cross-shaped aperture with each of said linear conductors overlying a respective sector between slots of said cross-shaped aperture, each of said linear conductors being one of a first type forming a feed line and a second type forming a stub projection providing an electrical impedance between said junction and the ground plane in a sector underlying the stub projection, wherein conductors overlying oppositely located sectors are of a same type and conductors overlying sectors adjacent a common slot are of a different type.

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