Omnidirectional radiofrequency antenna with conical reflector
First Claim
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1. A method of transmitting radiofrequency radiation over an azimuth angle of substantially 360°
- , said method comprising;
providing a substantially conical reflector;
illuminating said reflector with a beam having a Laguerre-Gaussian intensity distribution; and
locating the minimum of the Laguerre-Gaussian distribution coinciding with the apex of the reflector, wherein the arrangement of the beam and reflector being such that the radiation reflected from the reflector is divergent.
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Abstract
An antenna system for providing radiation over substantially 360° in azimuth by illuminating a conical reflector with a radiation beam having a frequency distribution with a local minimum which is coincident with the point of the reflector thus avoiding scattering. Preferably the radiation intensity distribution is annular, most preferably being Laguerre-Gaussian in nature.
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Citations
11 Claims
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1. A method of transmitting radiofrequency radiation over an azimuth angle of substantially 360°
- , said method comprising;
providing a substantially conical reflector; illuminating said reflector with a beam having a Laguerre-Gaussian intensity distribution; and locating the minimum of the Laguerre-Gaussian distribution coinciding with the apex of the reflector, wherein the arrangement of the beam and reflector being such that the radiation reflected from the reflector is divergent.
- , said method comprising;
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2. A radiofrequency antenna for providing transmission over substantially 360°
- in azimuth, said antenna comprising;
a conical reflector; a source of radiofrequency radiation illuminating said reflector, said radiation having a beam directed at the apex of said conical reflector and with a Laguerre-Gaussian intensity distribution, the minimum of the Laguerre-Gaussian distribution coinciding with the apex of the reflector, the beam and the reflector interrelated such that the radiation reflected from the reflector is divergent. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11)
- in azimuth, said antenna comprising;
Specification