Coaxial polarizer

Patent metadata

Field	Value
Publication number	US-9837693-B2
Application number	US-201314039872-A
Country	US
Kind code	B2
Filing date	Sep 27, 2013
Priority date	Sep 27, 2013
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A coaxial polarizer is provided. The coaxial polarizer includes an outer-conductive tube, an inner-conductive tube positioned within and axially aligned with the outer-conductive tube, and two dielectric bars each having a flat-first surface. The inner-conductive tube has two shallow-cavities on opposing portions of an outer surface of the inner-conductive tube. The shallow-cavities each have at least one planar area having a cavity length parallel to a Z axis and a cavity width, including a minimum width, perpendicular to the Z axis and to a radial direction of the inner-conductive tube. The flat-first surface has a dielectric length and width that are parallel and perpendicular to the Z axis, respectively. The dielectric length and dielectric width are less than the cavity length and the minimum width, respectively. The two flat-first surfaces of the respective two dielectric bars contact at least a portion of the respective two planar areas of the two shallow-cavities.

First claim

What is claimed is:

1. A coaxial polarizer comprising:
an outer-conductive tube;
an inner-conductive tube positioned within the outer-conductive tube and axially aligned with the outer-conductive tube, the inner-conductive tube having two shallow-cavities on opposing portions of an outer surface of the inner-conductive tube, the shallow-cavities each having at least one planar area, the at least one planar area having a cavity length parallel to a Z axis and having at least one cavity width that is perpendicular to the Z axis and perpendicular to a radial direction of the inner-conductive tube, the at least one cavity width including a minimum width; and
two dielectric bars each having a flat-first surface, the flat-first surface having a dielectric length parallel to the Z axis and a dielectric width perpendicular to the Z axis, the dielectric length being less than the cavity length and the dielectric width being less than the minimum width, wherein cross-sections of each of the two dielectric bars taken perpendicular to the Z axis have four respective surfaces in a rectangular shape, and wherein the two flat-first surfaces of the respective two dielectric bars contact at least a portion of the respective two planar areas of the two shallow-cavities.

2. The coaxial polarizer of claim 1 , further comprising:
a metal ring encircling the outer surface of the inner-conductive tube, the metal ring being offset, along the Z axis, from the shallow-cavities.

3. The coaxial polarizer of claim 1 , wherein the at least one planar area of each of the two opposing shallow-cavities comprises:
a first planar area in a first section having a first-cavity width equal to the minimum width, the first-cavity width being perpendicular to the Z axis and perpendicular to the radial direction of the inner-conductive tube;
a second planar area in a second section adjoined to the first section and having a second-cavity width perpendicular to the Z axis and perpendicular to the radial direction of the inner-conductive tube; and
a third planar area in a third section adjoined to the first section having a third-cavity width perpendicular to the Z axis and perpendicular to the radial direction of the inner-conductive tube, wherein the second section and the third section are offset from each other by a length of the first section, and wherein the second-cavity width and the third-cavity width are larger than the minimum width.

4. The coaxial polarizer of claim 1 , wherein the at least one planar area of at least one of the opposing two shallow-cavities comprises:
a first-planar area that spans a first plane in the first section;
a second-planar area that spans a second plane in the second section, the second plane being offset in a negative radial direction from the first plane; and
a third planar area that spans a third plane in the third section, the third plane being offset in the negative radial direction from the first plane.

5. The coaxial polarizer of claim 1 , wherein at least one of the two dielectric bars has at least one chamfered corner located on at least one edge of the flat-first surface perpendicular to the dielectric length.

6. The coaxial polarizer of claim 1 , wherein the at least one planar area of the respective two shallow-cavities include a single planar area that is rectangular in shape.

7. The coaxial polarizer of claim 6 , wherein the rectangular shape of the at least one planar area includes rounded corners, wherein each of the two dielectric bars further comprises:
at least one chamfered-edge perpendicular to the flat-first surface, wherein the at least one chamfered-edge is proximal to a respective at least one rounded corner when the flat-first surface of the dielectric bar contacts the at least a portion of the planar area of the shallow-cavity.

8. The coaxial polarizer of claim 1 , wherein the cross-sections of each of the two dielectric bars taken perpendicular to the Z axis include:
a first-cross-section having a first-rectangular shape including a width that is less than the minimum width; and
a second-cross-section having a second-rectangular shape including a width that is less than the minimum width.

9. An inner-conductive tube for use in a coaxial polarizer, comprising:
a first shallow-cavity on an outer surface of the inner-conductive tube, wherein the first shallow-cavity has a first-full-planar area, the first-full-planar area having a first-cavity length parallel to a Z axis and having at least one first-cavity width perpendicular to the Z axis and perpendicular to a first radial direction of the inner-conductive tube, the at least one first-cavity width including a first-minimum width; and
a second shallow-cavity on the outer surface of the inner-conductive tube, the second shallow-cavity opposing the first shallow-cavity and having a second-full-planar area, the second-full-planar area having a second-cavity length parallel to the Z axis and having at least one second-cavity width perpendicular to the Z axis and perpendicular to a second radial direction of the inner-conductive tube, the at least one second-cavity width including a second-minimum width.

10. The inner-conductive tube of claim 9 , further comprising:
a metal ring encircling the outer surface of the inner-conductive tube, the ring being offset, along the Z axis, from the first shallow-cavity and the second shallow-cavity.

11. The inner-conductive tube of claim 9 , wherein the first-cavity length equals the second-cavity length and the at least one first-cavity width equals the at least one second-cavity width.

12. The inner-conductive tube of claim 9 , wherein the first-full-planar area of the first shallow-cavity comprises:
a first planar area in a first section having a first-cavity width equal to the first-minimum width, and first-cavity width being perpendicular to the Z axis and perpendicular to the first radial direction of the inner-conductive tube;
a second planar area in a second section adjoined to the first section and having a second-cavity width perpendicular to the Z axis and perpendicular to the first radial direction of the inner-conductive tube; and
a third planar area in a third section adjoined to the first section having a third-cavity width perpendicular to the Z axis and perpendicular to the first radial direction of the inner-conductive tube, wherein the second section and the third section are offset from each other by a length of the first section, and wherein the second-cavity width and third-cavity width are larger than the first-minimum width.

13. The inner-conductive tube of claim 12 , wherein the second-full-planar area of the second shallow-cavity comprises:
a fourth planar area in a fourth section having the fourth-cavity width equal to the second-minimum width, the fourth-cavity width being perpendicular to the Z axis and perpendicular to the second radial direction of the inner-conductive tube;
a fifth planar area in a fifth section adjoined to the fourth section having a fifth-cavity width perpendicular to the Z axis and perpendicular to the second radial direction of the inner-conductive tube; and
a sixth planar area in a sixth section adjoined to the fourth section having a sixth cavity width perpendicular to the Z axis, wherein the fifth section and the sixth section are offset from each other by a length of the fourth section, and wherein the fifth-cavity width and sixth-cavity width are larger than the second-minimum width.

14. The inner-conductive tube of claim 9 , wherein at least one of the first shallow-cavity and the second shallow-cavity comprises:
a first-section-planar area that spans

Assignees

• Honeywell Int Inc

Inventors

• Rogers Shawn D
• Bunn Craig A
• Mitchum Gary L
• Hoover John C

Classifications

• H01P11/00

  Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type · CPC title

• H01P1/172 Primary

  using a dielectric element · CPC title

• Y10T29/49016

  Antenna or wave energy "plumbing" making · CPC title

• H01P1/165

  for rotating the plane of polarisation · CPC title