Passive radio-frequency redirector device

Patent metadata

Field	Value
Publication number	US-10939305-B2
Application number	US-201715658023-A
Country	US
Kind code	B2
Filing date	Jul 24, 2017
Priority date	Jul 24, 2017
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

A passive radio-frequency redirector device is provided that includes: a polarized antenna configured to produce a radiation pattern in an azimuthal plane; and a directional antenna configured to produce a directional radiation pattern that is substantially complementary to the radiation pattern of the polarized antenna, wherein the directional radiation pattern is substantially cross-polarized relative to the radiation pattern of the polarized antenna, and the polarized antenna and the directional antenna are passively coupled together.

First claim

We claim:

1. A device comprising:
a polarized antenna configured to produce a radiation pattern in an azimuthal plane; and
a directional antenna configured to produce a directional radiation pattern that is substantially complementary to the radiation pattern of the polarized antenna based on a respective angular domain,
wherein the directional radiation pattern is substantially cross-polarized relative to the radiation pattern of the polarized antenna, and the polarized antenna and the directional antenna are passively coupled together.

2. The device of claim 1 , wherein the directional antenna comprises a Yagi-Uda antenna, a support structure of the Yagi-Uda antenna being substantially parallel to the polarized antenna.

3. The device of claim 2 , wherein the support structure and the polarized antenna are spaced a given distance apart.

4. The device of claim 2 , wherein the support structure is configured as a reflector for the polarized antenna to shape the radiation pattern in the azimuthal plane.

5. The device of claim 1 , wherein the directional antenna comprises a Yagi-Uda antenna, and the polarized antenna comprises a support structure of the Yagi-Uda antenna.

6. The device of claim 5 , wherein the radiation pattern of the polarized antenna is substantially omni-directional in the azimuthal plane.

7. The device of claim 5 , wherein the polarized antenna comprises a plurality of linear half wave coaxial devices, wherein respective cores of the plurality of linear half wave coaxial devices are electrically connected to an external conductor of adjacent coaxial devices.

8. The device of claim 5 , wherein at least a portion of the polarized antenna is flexible.

9. The device of claim 8 , further comprising a non-conductive flexible surface, the polarized antenna and the Yagi-Uda antenna integrated into the non-conductive flexible surface.

10. The device of claim 5 , wherein a plurality of multiple half-wave dipole elements of the Yagi-Uda antenna are bonded perpendicularly to the polarized antenna.

11. The device of claim 1 , wherein the polarized antenna is unbalanced and the directional antenna is balanced, the polarized antenna and the directional antenna passively coupled together using one or more of a balun and an impedance matching circuit.

12. The device of claim 1 , wherein the polarized antenna is unbalanced and the directional antenna is unbalanced, the polarized antenna and the directional antenna passively coupled together using an unbalanced feed.

13. The device of claim 12 , wherein the directional antenna comprises a horn antenna.

14. The device of claim 1 , wherein the directional antenna comprises a traveling-wave antenna.

15. The device of claim 1 , wherein the polarized antenna comprises a respective directional antenna.

16. The device of claim 1 , wherein the polarized antenna and the directional antenna integrated into one or more of a housing and an advertising panel.

17. The device of claim 1 , wherein the directional radiation pattern comprises a pencil beam radiation pattern.

18. The device of claim 1 , wherein the polarized antenna comprises a polarized co-linear antenna.

19. The device of claim 1 , further comprising a support structure, the support structure comprising one or more of a conductive material and metal, the support structure located along a longitudinal axis of one or more of the directional antenna and the polarized antenna.

20. The device of claim 1 , wherein the directional radiation pattern of the directional antenna comprises a conical beam.

Assignees

• Motorola Solutions Inc

Inventors

• Faraone Antonio
• Sileo Robert J
• Bit-Babik Giorgi

Classifications

• H01Q25/001 Primary

  Crossed polarisation dual antennas (orthomode horns H01Q13/0258; cross-polarised rear feeds H01Q19/136; orthomode transducers H01P1/161) · CPC title

• H01Q11/02

  Non-resonant antennas, e.g. travelling-wave antenna (Yagi antennas H01Q19/30) · CPC title

• H01Q25/002

  providing at least two patterns of different beamwidth; Variable beamwidth antennas · CPC title

• H01Q21/29

  Combinations of different interacting antenna units for giving a desired directional characteristic (H01Q25/00 takes precedence) · CPC title

• H01Q19/30

  the primary active element being centre-fed and substantially straight, e.g. Yagi antenna · CPC title