ANTENNA
An antenna comprising: a folded dipole and a reflector positioned to reflect radiation emitted by the dipole that is incident on the reflector.
1 . An antenna comprising:
a folded dipole and
a reflector positioned to reflect radiation emitted by the dipole that is incident on the reflector.
2 . An antenna according to claim 1 wherein the folded dipole is configured to emit radiation in a first direction away from the reflector and in a second direction towards the reflector, and wherein the reflector is configured to reflect the radiation that is incident on it in the second direction away from the reflector, such that the reflected radiation travels in the first direction.
3 . An antenna according to claim 1 wherein the folded dipole comprises a bow-tie dipole.
4 . An antenna according to claim 3 wherein the folded dipole comprises substantially symmetrical electrically conductive first and second antenna elements and an electrically conductive third antenna element which electrically connects the first and second antenna elements.
5 . An antenna according to claim 1 wherein the antenna is substantially planar.
6 . An antenna according to claim 5 wherein the folded dipole is formed of a conductive material provided on a substrate.
7 . An antenna according to claim 6 wherein the substrate is a printed circuit board (PCB) substrate.
8 . An antenna according to claim 7 wherein the reflector is a ground plane of the PCB.
9 . An antenna according to claim 1 wherein the folded dipole is formed from one or more conductive rods.
10 . An antenna according to claim 1 further comprising a balun for connecting the antenna to a radio device.
11 . An antenna comprising substantially symmetrical electrically conductive first and second antenna elements and an electrically conductive third antenna element which electrically connects the first and second antenna elements.
12 . An antenna according to claim 11 further comprising a reflector positioned to impede radiation emitted by the first, second and third antenna elements from travelling in a first direction by reflecting radiation emitted by the dipole that is incident on the reflector.
13 . An antenna according to claim 12 wherein the reflector is configured to reflect the radiation that is incident on it in a second direction that is substantially opposed to the first direction.
14 . An antenna according to claim 11 wherein the antenna is substantially planar.
15 . An antenna according to claim 14 wherein the first, second and third antenna elements are formed of a conductive material provided on a substrate.
16 . An antenna according to claim 15 wherein the substrate is a printed circuit board (PCB) substrate.
17 . An antenna according to claim 16 wherein the reflector is a ground plane of the PCB.
18 . An antenna according to claim 11 wherein the first, second and third antenna elements are formed from one or more conductive rods.
19 . An antenna according to claim 11 further comprising a balun for connecting the antenna to a radio device.
20 . A device comprising a radio device and an antenna according to claim 1 .
21 . A device comprising a radio device and an antenna according to claim 11 .