Combined antenna, antenna array and method for using the antenna array
First Claim
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1. An antenna, comprising:
- a dipole antenna element having central feeding;
a common mode rejection filter,a first length of a two-conductor transmission line, anda 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, and a second length of transmission line arranged to make a connection between the filter and the dipole and to enable placement of the dipole on a second height above the ground plane regardless of a physical dimension of the filter and the first height.
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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.
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Citations
16 Claims
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1. An antenna, comprising:
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a dipole antenna element having central feeding; 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, and a second length of transmission line arranged to make a connection between the filter and the dipole and to enable placement of the dipole on a second height above the ground plane regardless of a physical dimension of the filter and the first height. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An antenna array, comprising:
multiple 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, and a second length of transmission line arranged to make a connection between the filter and the dipole and wherein the first length of the two conductor transmission line and the second length of the two conductor transmission line above the common mode rejection filter at a same time constitute active and structural elements of the antenna. - View Dependent Claims (13, 14, 15)
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16. 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:
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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.
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Specification