Combined antenna, antenna array and method for using the antenna array
AssigneeSaab AB
InventorAnders Ellgardt
Life of this patent
Estimating the term…
Abstract
An antenna including a dipole antenna element having central feeding points, a common mode rejection filter, a first length of a two-conductor transmission line, and a common mode rejection filter arranged and connected between a far end of the first length of the two-conductor transmission line and the feeding points of the dipole antenna element. The first length of the two-conductor transmission line is arranged to extend from a ground plane to a first height where the first length of the two-conductor transmission line is connected to the common mode rejection filter.
Claims17
An antenna, comprising:
- a dipole antenna element having central feeding points;
- a common mode rejection filter,
- a first length of a two-conductor transmission line, and
- a common mode rejection filter arranged and connected between a far end of the first length of the two-conductor transmission line and the feeding points of the dipole antenna element,
- wherein the first length of the two-conductor transmission line, is arranged to extend from a ground plane to a first height where the first length of the two-conductor transmission line is connected to the common mode rejection filter.
An antenna array, comprising:
- multiple antenna elements and having a common ground plane, each antenna element comprising
- a dipole antenna element having central feeding points,
- a common mode rejection filter,
- a first length of a two-conductor transmission line, and
- a common mode rejection filter arranged and connected between a far end of the first length of the two-conductor transmission line and the feeding points of the dipole antenna element,
- wherein the first length of the two-conductor transmission line is arranged to extend from a ground plane to a first height where the first length of the two-conductor transmission line is connected to the common mode rejection filter.
A method for using an array antenna comprising a plurality of antenna elements having a common ground plane, each antenna element comprising a dipole antenna element having central feeding points, a common mode rejection filter, a first length of a two-conductor transmission line, and a common mode rejection filter arranged and connected between a far end of the first length of the two-conductor transmission line and the feeding points of the dipole antenna element, wherein the first length of the two-conductor transmission line is arranged to extend from a ground plane to a first height where the first length of the two-conductor transmission line is connected to the common mode rejection filter, the method comprising:
- exciting the array antenna with a radar pulse signal in differential mode;
- phase-shifting the pulse signal in differential mode between array antenna elements to achieve scanning;
- receiving radar echoes signals;
- processing radar echoes signals;
- exciting the array antenna with a radar pulse signal in common mode;
- phase-shifting the pulse signal in common mode between array antenna elements to achieve scanning;
- receiving radar echoes signals;
- and
- processing radar echoes signals.
Dependencies are inferred from the claim text.