Compact antenna feeder with dual polarization

Patent metadata

Field	Value
Publication number	US-2018248240-A1
Application number	US-201615757255-A
Country	US
Kind code	A1
Filing date	Sep 1, 2016
Priority date	Sep 2, 2015
Publication date	Aug 30, 2018
Grant date	—

Abstract

A compact antenna feeder and associated circulator plate are disclosed. The antenna feeder includes: an orthomode transducer (OMT) polarizer, a first circulator and a second circulator. The OMT -polarizer includes a septum, a first port, a second port, and a third port. The first circulator is coupled to the first port of the OMT polarizer to define one orthogonally polarized microwave signal path between the first circulator and the third port of the OMT-polarizer. The second circulator is coupled to the second port of the OMT polarizer to define another orthogonally polarized microwave signal path between the second circulator to the third port of the OMT-polarizer. The OMT polarizer includes a waveguide with the septum located therein separating the two orthogonally polarized microwave signal paths. The septum has a base mounted on the circulator plate and a step-shape body extending from the base and out of the circulator plate.

First claim

What is claimed is:

1 . An antenna feeder, comprising:
an orthomode transducer (OMT) polarizer, the OMT polarizer including a septum, a first port, a second port, and a third port; a first circulator, wherein the first circulator is coupled to the first port of the OMT polarizer; and a second circulator, wherein the second circulator is coupled to the third port of the OMT polarizer.

2 . The antenna feeder of claim 1 , wherein the first circulator and the second circulator are formed using a single circulator plate.

3 . The antenna feeder of claim 2 , wherein the septum has a base mounted on the circulator plate and a step-shape body extending from the base and out of the circulator plate.

4 . The antenna feeder of claim 3 , wherein the base has two transitions facing opposite directions, each transition being one selected from the group consisting of a slope transition and a step transition.

5 . The antenna feeder of claim 1 , wherein the OMT polarizer includes a waveguide with the septum located therein splitting the waveguide into two orthogonally polarized microwave signal paths.

6 . The antenna feeder of claim 3 , wherein one of the two orthogonally polarized microwave signal paths is a path between the first port and the third port of the OMT polarizer and the other one of the two orthogonally polarized microwave signal paths is a path between the second port and the third port of the OMT polarizer.

7 . An antenna coupling unit, comprising:
a first filter, a second filter, a third filter, and a fourth filter, each filter having an input port and an output port; an orthomode transducer (OMT) polarizer, the OMT polarizer including a septum, a first port, a second port, and a third port; and a circulator plate that is coupled to the OMT polarizer, the circulator plate further including:
a first circulator including a first port, a second port, and a third port, wherein the first port of the first circulator is coupled to the output port of the first filter, the second port of the first circulator is coupled to the first port of the OMT polarizer, and the third port of the first circulator is coupled to the input port of the second filter; and
a second circulator including a first port, a second port, and a third port, wherein the first port of the second circulator is coupled to the output port of the third filter, the second port of the second circulator is coupled to the second port of the OMT polarizer, and the third port of the second circulator is coupled to the input port of the fourth filter.

8 . The antenna coupling unit of claim 7 , further comprising:
a first insulator including an input port and an output port, the input port being coupled to a first transmitter and the output port being coupled to the input port of the first filter; a second insulator including an input port and an output port, the input port being coupled to the output port of the second filter and the output port being coupled to a first receiver; a third insulator including an input port and an output port, the input port being coupled to a second transmitter and the output port being coupled to the input port of the third filter; and a fourth insulator including an input port and an output port, the input port being coupled to the output port of the fourth filter and the output port being coupled to a second receiver.

9 . The antenna coupling unit of claim 7 , wherein:
the first transmitter and the second transmitter are located outside the circulator plate; and the first receiver and the second receiver are located outside the circulator plate.

10 . The antenna coupling unit of claim 7 , wherein the first circulator, the second circulator, the first isolator, the second isolator, the third isolator, and the fourth isolator are formed using a single plate.

11 . The antenna coupling unit of claim 7 , wherein the OMT polarizer includes a waveguide extending out of the circulator plate with the septum located therein splitting the waveguide into two orthogonally polarized microwave signal paths.

12 . The antenna coupling unit of claim 11 , wherein one of the two orthogonally polarized microwave signal paths is a path between the first port and the third port of the OMT polarizer and the other one of the two orthogonally polarized microwave signal paths is a path between the second port and the third port of the OMT polarizer.

13 . The antenna coupling unit of claim 7 , wherein the septum has a base mounted on the circulator plate and a step-shape body extending from the base and out of the circulator plate.

14 . The antenna coupling unit of claim 13 , wherein the base has two transitions facing opposite directions, each transition being one selected from the group consisting of a slope transition and a step transition.

15 . A two-transmitter two-receiver (2T2R) digital microwave radio, comprising:
a communication interface unit; communication circuitry configured to be coupled to the communication interface unit; and an antenna coupling unit configured to be coupled to the communication circuitry, the antenna coupling unit further comprising:
a first filter, a second filter, a third filter, and a fourth filter, each filter having an input port and an output port;
an orthomode transducer (OMT) polarizer, the OMT polarizer including a septum, a first port, a second port, and a third port; and
a circulator plate that is coupled to the OMT polarizer, the circulator plate further including:
a first circulator including a first port, a second port, and a third port, wherein the first port of the first circulator is coupled to the output port of the first filter, the second port of the first circulator is coupled to the first port of the OMT polarizer, and the third port of the first circulator is coupled to the input port of the second filter; and
a second circulator including a first port, a second port, and a third port, wherein the first port of the second circulator is coupled to the output port of the third filter, the second port of the second circulator is coupled to the second port of the OMT polarizer, and the third port of the second circulator is coupled to the input port of the fourth filter.

16 . The 2T2R digital microwave radio of claim 15 , wherein the communication circuitry further including a first transmitter, a second transmitter, a first receiver, and a second receiver, respectively.

17 . The 2T2R digital microwave radio of claim 16 , wherein the antenna coupling unit further comprises:
a first insulator coupling the first transmitter to the first filter; a second insulator coupling the first receiver to the second filter; a third insulator coupling the second transmitter to the third filter; and a fourth insulator coupling the second receiver to the fourth filter.

18 . The 2T2R digital microwave radio of claim 17 , wherein the first circulator, the second circulator, the first isolator, the second isolator, the third isolator, and the fourth isolator are formed using a single plate.

19 . The 2T2R digital microwave radio of claim 15 , wherein the OMT polarizer includes a waveguide extending out of the circulator plate with the septum located therein splitting the waveguide into two orthogonally polarized microwave signal paths.

20 . The 2T2R digital microwave radio of claim 19 , wherein one of the two orthogonally polarized microwave signal paths is a path between the first port and the third port of the OMT polarizer and the other one of the two or

Assignees

• Feng Zhiping
• Zte Corp

Inventors

• Feng Zhiping
• Nealis Ed John
• Li Zhuo
• Shen Ying

Classifications

• H01P1/38

  Circulators · CPC title

• H01P1/173

  using a conductive element · CPC title

• H01P1/39

  Hollow waveguide circulators · CPC title

• H04B7/0408

  using two or more beams, i.e. beam diversity · CPC title

• H01P1/165 Primary

  for rotating the plane of polarisation · CPC title