Electrical isolation apparatus

Patent metadata

Field	Value
Publication number	US-12327902-B2
Application number	US-202217838533-A
Country	US
Kind code	B2
Filing date	Jun 13, 2022
Priority date	Sep 23, 2020
Publication date	Jun 10, 2025
Grant date	Jun 10, 2025

Abstract

An electrical isolation apparatus. A signal is transmitted between a first transmission circuit, a first reference circuit, a second transmission circuit, and a second reference circuit according to a principle of electric field coupling between conductors. Therefore, the electrical isolation apparatus can be applied to isolation and transmission for a signal with a relatively high frequency between a first signal device and a second signal device. In addition, a material used by the electrical isolation apparatus may be a common metal conductor, which greatly reduces a size and costs of the electrical isolation apparatus and facilitates manufacturing and implementation of the electrical isolation apparatus.

First claim

What is claimed is:

1. An electrical isolation apparatus, comprising:
a primary stage configured to connect to a first signal device, wherein the primary stage comprises a first reference circuit and a first transmission circuit; and
a secondary stage configured to connect to a second signal device, wherein the secondary stage comprises a second transmission circuit and a second reference circuit, wherein
the first reference circuit, the first transmission circuit, the second transmission circuit, and the second reference circuit are not in contact with each other, and are sequentially disposed in parallel to a first plane, and there is a spacing between a projection of the first reference circuit on the first plane and a projection of the second reference circuit on the first plane;
the first transmission circuit comprises a first part and a second part; wherein
a projection of the first part on the first plane overlaps with a projection of a first region of the first reference circuit on the first plane, and a projection of the second part on the first plane overlaps with a projection of a second region of the second reference circuit on the first plane; and
the second transmission circuit comprises a third part and a fourth part; wherein
a projection of the third part on the first plane overlaps with a projection of a third region of the second reference circuit on the first plane, and a projection of the fourth part on the first plane overlaps with a projection of a fourth region of the first reference circuit on the first plane.

2. The electrical isolation apparatus according to claim 1 , wherein the apparatus further comprises at least one of:
a first insulation circuit, parallel to the first plane, disposed between the first reference circuit and the first transmission circuit, and configured to isolate the first reference circuit from the first transmission circuit;
a second insulation circuit, parallel to the first plane, disposed between the first transmission circuit and the second transmission circuit, and configured to isolate the first transmission circuit from the second transmission circuit; and
a third insulation circuit, parallel to the first plane, disposed between the second transmission circuit and the second reference circuit, and configured to isolate the second transmission circuit from the second reference circuit.

3. The electrical isolation apparatus according to claim 1 , wherein the apparatus further comprises at least one of:
a first matching circuit, disposed between the first signal device and the primary stage, and configured to perform impedance matching on a signal passing through the first matching circuit; and
a second matching circuit, disposed between the second signal device and the secondary stage, and configured to perform impedance matching on a signal passing through the second matching circuit.

4. The electrical isolation apparatus according to claim 1 , wherein
a shape of the second part comprises a circular shape, a rectangular shape, a ring shape, or a shape of a letter L; and
a shape of the fourth part is the same as that of the second part.

5. The electrical isolation apparatus according to claim 2 , wherein
materials of the first transmission circuit, the second transmission circuit, the first reference circuit, and the second reference circuit are copper foil metal conductors; and
materials of the first insulation circuit, the second insulation circuit, and the third insulation circuit are filler insulation materials.

6. An electrical isolation apparatus, comprising:
a primary stage configured to connect to a first signal device, wherein the primary stage comprises a first transmission circuit, a first return circuit, and a first reference circuit; and
a secondary stage configured to connect to a second signal device, wherein the secondary stage comprises a second transmission circuit, a second return circuit, and a second reference circuit, wherein
the first transmission circuit, the first reference circuit, and the second return circuit are disposed on a same plane, and the second transmission circuit, the second reference circuit, and the first return circuit are disposed on a same plane;
the first reference circuit, the first transmission circuit, the second transmission circuit, the second reference circuit, the first return circuit, and the second return circuit are not in contact with each other, and are each disposed in parallel to a first plane; there is a spacing between a projection of the first reference circuit on the first plane and a projection of the second return circuit on the first plane, and there is a spacing between a projection of the second reference circuit on the first plane and a projection of the first return circuit on the first plane;
the first transmission circuit comprises a first part and a second part; wherein
a projection of the first part on the first plane falls within a projection, on the first plane, of a first return structure disposed in the first return circuit, and a projection of the second part on the first plane overlaps with a projection of a second region of the second reference circuit on the first plane; and
the second transmission circuit comprises a third part and a fourth part; wherein
a projection of the third part on the first plane falls within a projection, on the first plane, of a second return structure disposed in the second return circuit, and a projection of the fourth part on the first plane overlaps with a projection of a fourth region of the first reference circuit on the first plane.

7. The electrical isolation apparatus according to claim 6 , wherein the apparatus further comprises:
a fourth insulation circuit, parallel to the first plane, and disposed between a plane on which the first transmission circuit, the first reference circuit, and the second return circuit are located and a plane on which the second transmission circuit, the second reference circuit, and the first return circuit are located.

8. The electrical isolation apparatus according to claim 6 , wherein the apparatus further comprises at least one:
a first matching circuit, disposed between the first signal device and the primary stage, and configured to perform impedance matching on a signal passing through the first matching circuit; and
a second matching circuit, disposed between the second signal device and the secondary stage, and configured to perform impedance matching on a signal passing through the second matching circuit.

9. The electrical isolation apparatus according to claim 6 , wherein
a shape of the second part comprises a circular shape, a rectangular shape, a ring shape, or a shape of a letter L; and
a shape of the fourth part is the same as that of the second part.

10. The electrical isolation apparatus according to claim 7 , wherein
materials of the first transmission circuit, the second transmission circuit, the first reference circuit, and the second reference circuit are copper foil metal conductors; and
a material of the fourth insulation circuit is a filler insulation material.

11. A signal transmission method, comprising:
obtaining a first signal from a first signal device;
inputting the first signal into a first transmission circuit and a first reference circuit;
receiving a second signal output by a second transmission circuit and a second reference circuit, wherein the first reference circuit, the first transmission circuit, the second transmission circuit, and the second reference circuit are not in contact with each other and are sequentially disposed in parallel to a first plane; there is a spacing between a projection of the first reference

Assignees

• Huawei Digital Power Tech Co Ltd

Inventors

• Yang Li
• Zou Zhenghua

Classifications

• H01P1/36

  Isolators · CPC title

• H01P1/37 Primary

  Field displacement isolators · CPC title

• H01P5/028 Primary

  between strip lines · CPC title

• H01P5/02 Primary

  with invariable factor of coupling (H01P5/12 takes precedence {choke joints H01P1/04, H01P1/06}) · CPC title