US 9,865,921 B2Granted

Directional multi-band antenna

AssigneeBAE SYSTEMS plc

InventorsMichael Stewart Griffith, Leslie Charles Laycock

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Abstract

There is disclosed a directional multi-band antenna comprising: a primary reflector, at least one secondary reflector, a multi-layer dielectric layer selectively reflective or transmissive of incident radiation according to wavelength, the layer being provided at the surface of either the primary or the secondary reflector, an RF unit comprising a collocated sensor and transmitter, an Optical unit comprising a collocated sensor and transmitter, arranged such that the primary reflector is for passing signals between the secondary reflector and the environment, the secondary reflector is firstly for passing signals between the primary reflector and the RF unit, and secondly for passing signals between the primary reflector and the Optical unit and arranged such that the antenna is operable to transmit or receive, RF or Optical signals, along a common beam axis.

Claims20

Dependent claims

A directional multi-band antenna comprising:

a primary reflector;
at least one secondary reflector;
a multi-layer dielectric layer selectively reflective or transmissive of incident radiation according to wavelength, the multi-layer dielectric layer being provided at a surface of either the primary or the secondary reflector;
an RF unit comprising a collocated sensor and transmitter, the RF unit positioned on a first side of the secondary reflector;
and
an optical unit comprising a collocated sensor and transmitter, the optical unit positioned on the first side of the secondary reflector;
wherein:
the primary reflector is for passing signals between the secondary reflector and the environment;
the secondary reflector is for reflecting RF signals from the primary reflector to the RF unit and from the RF unit to the primary reflector, and for reflecting optical signals from the primary reflector to the optical unit and from the optical unit to the primary reflector;
and
the antenna is operable to transmit or receive, RF or Optical signals, along a common beam axis;
wherein the secondary reflector is operable to reflect both the RF signals received from the primary reflector and the optical signals received from the primary reflector along the common beam axis in a same direction away from the secondary reflector.

9 more elements

A directional multi-band antenna comprising:

a primary reflector;
at least one secondary reflector;
a multi-layer dielectric layer selectively reflective or transmissive of incident radiation according to wavelength, the multi-layer dielectric layer being provided at a surface of either the primary or the secondary reflector;
an RF unit comprising a collocated sensor and transmitter, the RF unit positioned on a first side of the secondary reflector;
and
an optical unit comprising a collocated sensor and transmitter, the optical unit positioned on the first side of the secondary reflector;
wherein the optical unit and the RF unit are arranged to project/transmit along a common axis and in the same direction and away from the secondary reflector, wherein the secondary reflector is arranged to reflect RF signals from the RF unit to the primary reflector and to reflect RF signals from the primary reflector to the RF unit, wherein the secondary reflector is further arranged to reflect optical signals from the optical unit to the primary reflector and to reflect optical signals from the primary reflector to the optical unit, and wherein the reflective/transmissive coating is provided on the surface of the primary reflector.

4 more elements

A directional multi-band antenna comprising:

a primary reflector;
at least one secondary reflector;
a multi-layer dielectric layer selectively reflective or transmissive of incident radiation according to wavelength, the multi-layer dielectric layer being provided at a surface of either the primary or the secondary reflector;
an RF unit comprising a collocated sensor and transmitter, the RF unit positioned on a first side of the secondary reflector;
and
an optical unit comprising a collocated sensor and transmitter, the optical unit positioned on the first side of the secondary reflector;
wherein the optical unit and the RF unit are arranged to project/transmit along a common axis and towards each other and away from the secondary reflector, wherein the secondary reflector is arranged to reflect RF signals from the RF unit to the primary reflector and to reflect RF signals from the primary reflector to the RF unit, wherein the secondary reflector is further arranged to reflect optical signals from the optical unit to the secondary reflector and to reflect optical signals from the secondary reflector to the optical unit, wherein the secondary reflector is formed of a reflective/transmissive material, and wherein the reflective/transmissive coating is provided on the surface of the primary reflector.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/762,979Filed 27 Jan 2014
Priority: EP 1327501728 Jan 2013
Published: US 2015/0357713 A110 Dec 2015
Granted: 9 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H01Q 5/22
Characterised by the operating wavebands: rF wavebands combined with non-RF wavebands, e.g. infrared or optical
G02B 3/14
Fluid-filled or evacuated lenses: of variable focal length
G02B 6/4225
Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements: by a direct measurement of…
G02B 17/0605
Using mirrors only , i.e. having only one curved mirror: using two curved mirrors