Mini isolator

Patent metadata

Field	Value
Publication number	US-10530072-B2
Application number	US-201715468893-A
Country	US
Kind code	B2
Filing date	Mar 24, 2017
Priority date	Oct 9, 2015
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

A coaxial radio frequency (RF) isolator is disclosed. The isolator can include an input connector, an output connector, and a conductive body. The isolator can also include an outer shield surrounding a portion of the body. The isolator can further include a coupler within the outer shield and forming a cavity between an inner surface of the body and the coupling member. The coupler can be configured to electrically couple with the outer shield. Additionally, the isolator can include a coaxial circuit surrounding a portion of the coupler within the cavity. Further, the isolator can include a toroid surrounding a portion of the coupler and positioned within the cavity. Moreover, the isolator can include a signal conditioning circuit electrically configured to condition signals communicated between the input connector and the output connector.

First claim

What is claimed is:

1. A coaxial radio frequency (RF) isolator comprising:
a conductive body comprising a first coaxial coupler configured to connect the isolator to a first device;
a conductive outer shield configured to form an internal cavity within the body and the outer shield;
a dielectric sleeve positioned between the outer shield and the body, the dielectric sleeve being configured to electrically isolate the body from the outer shield;
a second coaxial coupler within the internal cavity, the second coaxial coupler being configured to connect the isolator to a second device;
a signal conditioning device positioned within the internal cavity, the signal conditioning device being configured to condition RF signals communicated between the first coaxial coupler and the second coaxial coupler;
a signal path through the isolator including the first coaxial coupler, the signal conditioning device, and the second coaxial coupler, the signal path being configured to conduct the RF signals communicated between the first coaxial coupler and the second coaxial coupler;
a coaxial circuit within the internal cavity and surrounding the second coaxial coupler and the signal path, the coaxial circuit being configured to block direct current flow between the body, the outer shield, and the second coaxial coupler; and
a magnetic toroid within the internal cavity and surrounding the second coaxial coupler and the signal path, and configured to filter the RF signals from electromagnetic interference.

2. The isolator of claim 1 , wherein the outer shield is configured to slide over the body and to attach to the body solely by compression fitting.

3. The isolator of claim 1 , wherein the coaxial circuit is configured to attach within the isolator solely by compression fitting.

4. The isolator of claim 1 , wherein:
the coaxial circuit comprises an annular shape;
a diameter of an outer surface of the annular shape is configured to contact the body;
a diameter of an inner surface of the annular shape is configured to contact the signal conditioning device; and
an upper surface of the annular shape is configured to contact the second coaxial coupler.

5. The isolator of claim 1 , wherein the coaxial circuit comprises:
an insulator ring;
a first conductor layer formed on an outer surface of the insulator ring;
a second conductor layer formed on an inner surface of the insulator ring; and
one or more electrical circuits positioned on the insulator ring and configured to electrically couple the first conductor layer and the second conductor layer.

6. The isolator of claim 1 , wherein the magnetic toroid comprises an inner diameter configured to fit around an outer diameter of the second coaxial coupler.

7. The isolator of claim 1 , further comprising a dielectric spacer comprising an annular shape, the spacer being configured to electrically isolate the body from the outer shield.

8. The isolator of claim 1 , wherein the sleeve comprises a cylindrical shape configured to fit over an outer surface of the outer shield and to provide an insulating grip on the outer surface of the isolator.

9. An isolator comprising:
an input connector configured to connect the isolator to a first device;
an output connector configured to connect the isolator to a second device;
a body comprising an outer shield;
a coupling member within the outer shield and forming a cavity between an inner surface of the body and the coupling member, wherein the coupling member is configured to electrically couple with the outer shield;
a coaxial circuit surrounding a first portion of the coupling member within the cavity;
a toroid surrounding a second portion of the coupling member and positioned within the cavity;
a compression member configured to apply force to the coaxial circuit and the toroid; and
a signal conditioning circuit configured to condition signals communicated between the input connector and the output connector.

10. The isolator of claim 9 , further comprising one or more dielectric members configured to electrically isolate the outer shield.

11. The isolator of claim 9 , wherein the coaxial circuit is configured to electrically couple the coupling member with the body.

12. The isolator of claim 9 , wherein:
the first connector comprises a coaxial coupler configured to receive a connector of the first device; and
the second connector comprises a coaxial coupler configured to receive a connector of the second device.

13. The isolator of claim 9 , wherein the signal conditioning circuit comprises a component selected from the group consisting of: a high pass filter, a low pass filter, an amplifier, a bandpass filter, a band reject filter, and a Multimedia over Coax Alliance (MoCA) circuit.

14. The isolator of claim 13 , further comprising a second coaxial circuit within the cavity surrounding a third portion of the coupling member.

15. The isolator of claim 13 , further comprising a second toroid within the cavity surrounding a third portion of the coupling member.

16. An isolator comprising:
an outer shield;
a first connector configured to connect the isolator to a first device;
a second connector configured to connect the isolator to a second device;
a conditioning circuit configured to condition signals communicated between the first connector and the second connector;
a coaxial circuit electrically connecting the outer shield to the second connector, wherein the coaxial circuit is configured to provide ground isolation between the first connector and the second connector;
a compression member configured to apply force to the coaxial circuit; and
a radio frequency filtering cavity surrounding the coaxial circuit and configured to filter electromagnetic interference.

17. The isolator of claim 16 , further comprising one or more magnetic toroids around the second connector and configured to filter the electromagnetic interference.

18. The isolator of claim 16 , wherein the coaxial circuit is configured to block direct current flow between the outer shield and the second connector.

19. The isolator of claim 16 , wherein the second connector and the outer shield comprise a unitary conductive body.

20. The isolator of claim 16 , wherein:
the first connector is configured to receive a connector of a first device that provides an input signal to the isolator; and
the second connector is configured to receive a connector of a second device that receives an output signal from the isolator.

21. The isolator of claim 16 , further comprising a signal path within the isolator including the first connector, the conditioning circuit, and the second connector, the signal path being configured to conduct the radio frequency signals communicated between the first connector and the second connector.

22. The isolator of claim 21 , wherein the coaxial circuit surrounds the signal path.

23. An isolator comprising:
an input connector;
an output connector; and
a body comprising an outer shield;
a coupling member within the outer shield and forming a cavity between an inner surface of the body and the coupling member, wherein the coupling member is configured to electrically couple with the outer shield;
a coaxial circuit surrounding a first portion of the coupling member within the cavity;
a toroid surrounding a second portion of the coupling member and positioned within the cavity; and
a signal conditioning circuit configured to condition signals communica

Assignees

• Ppc Broadband Inc

Inventors

• Alkan Erdogan

Classifications

• H01P1/30

  for compensation of, or protection against, temperature or moisture effects {; for improving power handling capability (H01P1/04, H01P1/08 take precedence)} · CPC title

• H01P1/202

  Coaxial filters (cascaded coaxial cavities H01P1/205) · CPC title

• H01R9/05

  for coaxial cables · CPC title

• H01P3/06

  Coaxial lines · CPC title

• H01P1/2007

  Filtering devices for biasing networks or DC returns · CPC title