Antenna Arrangement
An antenna arrangement is provided, which includes first and second antenna elements. A feeder line connects the first and second antenna elements for feeding a signal to and from the first and second antenna elements and the signal is inductively coupled between the feeder line and a calibration line so it can be fed to measurement equipment.
1 . An antenna arrangement, comprising:
an antenna element;
a feeder line configured to feed a signal to and from the antenna element; and
a calibration line proximal to and spaced apart from the feeder line and configured to receive the signal from the feeder line, and to transmit the signal to the feeder line, via inductive coupling.
2 . The antenna arrangement according to claim 1 , wherein the calibration line is configured so that it can be coupled to measurement equipment.
3 . The antenna arrangement according to claim 1 , wherein the calibration line is spaced apart from the feeder line by a dielectric material.
4 . The antenna arrangement according to claim 1 , further comprising an inductive coupler element positioned between the feeder line and the calibration line.
5 . The antenna arrangement according to claim 4 , wherein the inductive coupler element is provided in the calibration line.
6 . The antenna arrangement according to claim 4 , further comprising an additional antenna element so that said antenna element and the additional antenna element are arranged as first and second antenna elements of an antenna element pair, wherein the feeder line is configured to feed the signal to both the first and second antenna elements in the pair.
7 . The antenna element according to claim 6 , wherein the inductive coupler is symmetric about a junction point at which the feeder line divides into first and second branches leading towards the first and second antenna elements, respectively.
8 . The antenna arrangement according to claim 1 , wherein the antenna element is a patch antenna.
9 . The antenna arrangement according to claim 1 , further comprising a connector element adapted to connect to a corresponding connector element provided on another antenna arrangement so that the antenna arrangements may be cascaded.
10 . The antenna arrangement according to claim 9 , wherein the connector element is an RF coupler.
11 . The antenna arrangement according to claim 9 , wherein the antenna element is mounted on a base and the connector element is provided on the base.
12 . The antenna arrangement according to claim 11 , wherein the feeder line and the calibration line are provided in the base.
13 . The antenna arrangement according to claim 1 , wherein the feeder line and the calibration line are provided in a common plane.
14 . The antenna arrangement according to claim 11 , wherein the base is a printed circuit board or a coaxial system.
15 . The antenna arrangement according to claim 9 , wherein the cascaded antenna arrangements form an infinite coupler line coupling to 1−n number of antenna elements equally.
16 . An antenna arrangement comprising:
an antenna element;
a feeder line configured to feed a signal to and from the antenna element; and
a connector element configured to connect the antenna arrangement with a further antenna arrangement such that the antenna arrangements are electrically connectable and can be arranged in a stack.
17 . A method of receiving a signal from an antenna element for coupling to measurement equipment, the method comprising inductively coupling the signal from a feeder line supplying the signal to the antenna element to a calibration line, receiving the signal at the calibration line, inductively coupling a signal from the calibration line to the feeder line, and receiving the signal at the feeder line.
18 . The method according to claim 17 , further comprising feeding the signal from the calibration line to measurement equipment.