Antenna isolation shrouds and reflectors

Patent metadata

Field	Value
Publication number	US-9634373-B2
Application number	US-201514862470-A
Country	US
Kind code	B2
Filing date	Sep 23, 2015
Priority date	Jun 4, 2009
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

Shroud isolation, including choke shroud isolation, apparatuses for wireless antennas for point-to-point or point-to-multipoint transmission/communication of high bandwidth signals, and integrated reflectors including a shroud or choke shroud. A choke shroud systems may include a cylindrical body with an isolation choke boundary at the distal opening to attenuate electromagnetic signals to, from, or within the antenna. The isolation choke boundary region may have ridges that may be tuned to a band of interest. The isolation choke boundary may provide RF isolation when used near other antennas.

First claim

What is claimed is:

1. A parabolic antenna reflector apparatus, the apparatus comprising:
a parabolic reflector section having a central axis of symmetry and a circular opening perpendicular to the central axis of symmetry;
a shroud portion extending distally from the circular opening, the shroud portion having a distal opening;
a radome covering the distal opening and a side wall;
a choke portion connected to the side wall of the shroud portion, the choke portion comprising a plurality of parallel ridges parallel to the side wall and configured to attenuate RF electromagnetic radiation;
an integrated radio transceiver and feed comprising an elongate housing enclosing a substrate, transceiver circuitry on the substrate, an antenna radiator extending from the substrate;
a central opening through the parabolic reflector section through which the integrated radio transceiver and feed passes; and
a holder enclosing a distal end of the integrated radio transceiver and feed and configured to prevent transmission of RF energy out of the central opening and from a back of the integrated radio transceiver and feed, the holder mounted on a proximal side of the central opening so the central opening is continuous with an inner chamber within the holder, wherein the inner chamber secures the integrated radio transceiver and feed so that the integrated radio transceiver and feed is aligned with the central axis of symmetry.

2. The apparatus of claim 1 , wherein the wherein the antenna radiator of the integrated radio transceiver and feed further comprises an antenna feed, a director extending from the substrate, and a sub-reflector.

3. The apparatus of claim 1 , further wherein the distal opening of the shroud portion forms a plane at an angle relative to a plane perpendicular to the central axis of symmetry.

4. The apparatus of claim 1 , further wherein the distal opening of the shroud portion forms a plane at an angle of between 0.5 degrees and 15 degrees relative to a plane perpendicular to the central axis of symmetry.

5. The apparatus of claim 1 , wherein the inner chamber comprises a coating of a radio-frequency (RF) shielding material.

6. The apparatus of claim 1 , wherein the inner chamber comprises a coating of a radio-frequency (RF) shielding material comprising a copper and nickel plating.

7. The apparatus of claim 1 , wherein the central opening through the parabolic reflector section has a diameter of greater than 3 cm.

8. The apparatus of claim 1 , further comprising a rim around the distal opening having an outer edge comprising two parallel straight regions on opposite sides of the distal opening; wherein the radome is configure to cover the distal opening by sliding over the distal opening and engaging the two parallel straight regions.

9. The apparatus of claim 1 , further comprising a rim around the distal opening, wherein the rim comprises a scalloped outer edge.

10. The apparatus of claim 1 , wherein the choke portion extends only partially around a perimeter of the side wall of the shroud portion.

11. The apparatus of claim 1 , wherein the holder comprises a door on a side of the holder for passing a cord or cable from the integrated radio transceiver and feed out of the holder.

12. The apparatus of claim 1 , wherein the diameter of the distal opening of the shroud portion is between 200 mm and 700 mm.

13. The apparatus of claim 1 , further comprising a mounting bracket having a mounting bracket opening, wherein the mounting bracket is attached to the proximal side of the central opening between the parabolic reflector section and the holder so that a proximal end of an integrated radio transceiver and feed may pass through the central opening and bracket opening and into the holder.

14. The apparatus of claim 13 , wherein the mounting bracket comprises one or more notches configured to couple to a second mounting bracket having one or more protrusions adapted to engage the hone or more notches of the first mounting bracket, allowing the apparatus to be adjustably mounted onto a post, pole or surface to which the second mounting bracket is secured.

15. The apparatus of claim 1 , wherein the shroud portion comprises an annular wall extending between the circular opening of the parabolic reflector section and the distal opening; further wherein the diameter of the annular wall at a top portion of the apparatus is between 1.1 times and 3 times the diameter of the annular wall at a bottom portion of the apparatus.

16. A parabolic antenna reflector apparatus, the apparatus comprising:
a parabolic reflector section having a central axis of symmetry and a circular opening perpendicular to the central axis of symmetry;
a shroud portion extending distally from the circular opening, the shroud portion having a distal opening and a side wall;
a choke portion connected to the side wall of the shroud portion, the choke portion comprising a plurality of parallel ridges distal to the shroud portion and configured to attenuate RF electromagnetic radiation;
a radome covering the distal opening;
a central opening through the parabolic reflector section;
a holder enclosing a distal end of the integrated radio transceiver and feed and configured to prevent transmission of RF energy out of the central opening and from a back of the integrated radio transceiver and feed, the holder mounted on a proximal side of the central opening so the central opening is continuous with an inner chamber within the holder, wherein the inner chamber comprises a coating of a radio-frequency (RF) shielding material; and
an integrated radio transceiver and feed comprising an elongate housing enclosing a substrate, transceiver circuitry on the substrate, an antenna radiator extending from the substrate,
wherein the integrated radio transceiver and feed is held within the holder so that a sub-reflector extends from the holder, through the central opening and into the parabolic reflector section along the central axis of symmetry.

17. A parabolic antenna reflector apparatus, the apparatus comprising:
a parabolic reflector section having a central axis of symmetry and a circular opening perpendicular to the central axis of symmetry;
a shroud portion extending distally from the circular opening, the shroud portion having a distal opening and a side wall, wherein the parabolic reflector section and shroud section are continuous regions of a single piece of material;
a choke portion connected to the side wall of the shroud portion, the choke portion comprising a plurality of parallel ridges distal to the shroud portion and configured to attenuate RF electromagnetic radiation;
a rim around the distal opening having an outer edge comprising two parallel straight regions on opposite sides of the distal opening;
a radome covering the distal opening, wherein the radome is configure to slide over the distal opening and engage the two parallel straight regions;
an integrated radio transceiver and feed comprising an elongate housing enclosing a substrate, transceiver circuitry on the substrate, an antenna radiator extending from the substrate, and a sub-reflector;
a central opening through the parabolic reflector section through which the integrated radio transceiver and feed passes; and
a holder enclosing a distal end of the integrated radio transceiver and feed and configured to prevent transmission of RF energy out of the central opening and from a back of the integrated radio transceiver and feed, the holder mounted on a proximal side of the central opening so the central opening is continuous with an in

Assignees

• Ubiquiti Networks Inc

Inventors

• Lee Jude
• Sanford John R
• Pera Robert J

Classifications

• H01Q1/1228 Primary

  on a boom · CPC title

• H01Q19/022

  for reducing the edge scattering of reflectors · CPC title

• H01Q1/125

  Means for positioning · CPC title

• H01Q1/523 Primary

  between antennas of an array · CPC title

• H01Q1/242

  specially adapted for hand-held use · CPC title