CN115863947B

CN115863947B - T-shaped waveguide dispatcher

Info

Publication number: CN115863947B
Application number: CN202211290648.8A
Authority: CN
Inventors: 王清源; 黄钟毓
Original assignee: University of Electronic Science and Technology of China
Current assignee: University of Electronic Science and Technology of China
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2024-04-02
Anticipated expiration: 2042-10-21
Also published as: CN115863947A

Abstract

The invention discloses a design scheme of a T-shaped waveguide adapter. Another rectangle with smaller width or other shape is added at the bottom center part of the rectangle of the cross section of the common waveguide to form the T-shaped waveguide. With such a T-shaped waveguide, the spacing between the top end of the pin in the waveguide and the bottom of the waveguide can be significantly increased when resonance is achieved compared to when a conventional rectangular waveguide is used. Therefore, the adapter adopting the T-shaped waveguide can realize infinite parallel susceptance and effectively avoid breakdown, and the power capacity of the adapter is obviously increased. The T-shaped waveguide dispatcher has the advantages of compact structure, large power capacity and no dispatching blind area, and can be widely applied to microwave systems with high average power, in particular to the industrial application field of microwave energy.

Description

T-shaped waveguide dispatcher

Technical Field

The invention relates to a microwave allocation device, in particular to an heightened waveguide pin allocation device with high power capacity, emphasized allocation capacity and wide matching bandwidth.

Background

Load mismatch is a technical problem that often needs to be solved in designing microwave systems. The traditional waveguide adapter can well meet the matching requirements of many occasions by adopting three pins with adjustable depth, wherein the pins are positioned on the waveguide axis and have a distance of one quarter of the waveguide wavelength. However, the conventional waveguide dispenser has the following problems: the ratio of the height of the cross section to the width of the cross section of a conventional standard waveguide is not more than 0.5. In a waveguide adapter employing only standard waveguides, if a pin extends into a section of waveguide, a resonant state will occur as the tip of the pin in the waveguide approaches the opposite waveguide wall, and the equivalent parallel susceptance of the pin is infinite (ignoring losses from the pin and waveguide), resulting in total reflection of the microwaves. This condition is beneficial when the dispatcher is used to dispatch highly mismatched loads. However, since the ratio of the height of the cross section to the width of the cross section of a standard waveguide in a conventional waveguide adapter is not more than 0.5, the tip of the pin in the waveguide must be very close to the opposite waveguide wall in order to reach a resonant state, which easily results in breakdown of the waveguide adapter. Therefore, since the depth of the pin extending into the interior of the waveguide is limited in the conventional waveguide dispenser, the pin cannot realize infinite parallel susceptance, and thus, the waveguide dispenser formed has a matching blind area. In practice, the maximum mismatched standing wave ratio that a conventional waveguide adapter can match is typically no more than 30.

Disclosure of Invention

The invention aims to provide a T-shaped waveguide adapter. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

a T-shaped waveguide adapter comprising a length of waveguide with an axis in the Z direction and at least one pin with an axis in the Y direction; the depth of the pin extending into the waveguide may be externally applied from the waveguide to adjust; the cross section of the waveguide is T-shaped; the X direction, the Y direction and the Z direction form a rectangular coordinate system.

At least one nut is arranged around each pin; the depth of the pin extending into the waveguide may be secured by the nut lock.

The cross section of the waveguide is T-shaped and comprises a rectangle and a polygon; the polygon is arranged in the-Y direction of the rectangle. The polygon may be any shape including circular, oval, triangular, etc.

Preferably, the cross section of the waveguide comprises a first rectangle and a second rectangle; the width of the second rectangle in the X direction is smaller than that of the first rectangle in the X direction. Moreover, the cross section of the waveguide is in a left-right mirror symmetrical pattern.

The ports of the dispenser are generally rectangular waveguides. In order to match the ports of the dispenser after all stops are taken out, a matching section may be provided between the rectangular waveguide port and the T-shaped waveguide.

In a preferred design, the number of pins is 3. The pins are columnar bodies, and the cross section of the pins is circular; the tip of at least one pin located within the waveguide is rounded.

A choke groove structure is provided around at least one pin.

The invention has the beneficial effects that:

the invention discloses a design scheme of a T-shaped waveguide adapter. Another rectangle with smaller width or other shape is added at the bottom center part of the rectangle of the cross section of the common waveguide to form the T-shaped waveguide. With such a T-shaped waveguide, the spacing between the top end of the pin in the waveguide and the bottom of the waveguide can be significantly increased when resonance is achieved. Therefore, the adapter adopting the T-shaped waveguide can realize infinite parallel susceptance and effectively avoid breakdown, and the power capacity of the adapter is obviously increased. The T-shaped waveguide dispatcher has the advantages of compact structure, large power capacity and no dispatching blind area, and can be widely applied to microwave systems with high average power, in particular to the industrial application field of microwave energy.

Drawings

FIG. 1 is a schematic cross-sectional view of example 1 of the present invention

FIG. 2 is a schematic top view of FIG. 1

FIG. 3 is a schematic view of the AA-direction cross-section of FIG. 2

The reference numbers in the drawings correspond to the designations: 1-waveguide, 2-pin, 3-nut, 4-choke groove structure.

Some terms in this specification are defined as follows:

the horizontal direction, i.e. the direction lying in the horizontal plane, i.e. the direction lying in the XZ plane.

Vertical, i.e. vertically upwards from the horizontal.

Above, refer to the Y direction.

Below, refer to the-Y direction.

Left, refer to the X direction.

Right, refer to the-X direction.

Detailed Description

Example 1

As shown in fig. 1-3.

A T-shaped waveguide adjuster comprises a section of waveguide 1 with an axis along the Z direction and 3 pins 2 with axes along the Y direction; the depth of the pin 2 protruding into the waveguide 1 can be adjusted by adding from the waveguide 1; the cross section of the waveguide 1 is T-shaped; the X direction, the Y direction and the Z direction form a rectangular coordinate system.

A nut 3 is arranged around each pin 2; the depth of the pin 2 extending into the waveguide 1 can be secured by means of the nut 3.

The cross section of the waveguide 1 comprises a first rectangle and a second rectangle; the width of the second rectangle in the X direction is smaller than that of the first rectangle in the X direction. Moreover, the cross section of the waveguide 1 is in a left-right mirror symmetrical pattern.

The pins 2 are columnar bodies, and the cross section of the pins is circular; the tip of each pin 2 located within the waveguide 1 is rounded.

A choke structure 4 is provided around each pin 2.

The above description is only of the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, equivalent replacement, improvement, etc. of the above embodiments still fall within the protection scope of the technical solution of the present invention, according to the technical spirit of the present invention.

Claims

1. A T-shaped waveguide adapter comprising a length of waveguide (1) with an axis in the Z direction and at least one pin (2) with an axis in the Y direction; the depth of the pin (2) extending into the waveguide (1) can be adjusted by adding from the waveguide (1); the cross section of the waveguide (1) is T-shaped; the X direction, the Y direction and the Z direction form a rectangular coordinate system, and the cross section of the waveguide comprises a first rectangle and a second rectangle; the first rectangle and the second rectangle are adjacently arranged along the Y direction; the width of the second rectangle in the X direction is smaller than that of the first rectangle in the X direction; the pins extend in the Y-direction from the broadside of the first rectangle to the second rectangle.

2. A T-shaped waveguide adapter according to claim 1, characterized in that at least one screw cap (3) is provided around each pin (2); the depth of the pin (2) extending into the waveguide (1)) can be secured by means of the screw cap (3).

3. A T-shaped waveguide adapter according to claim 1, characterized in that the cross section of the waveguide (1) is a left-right mirror symmetrical pattern.

4. A T-shaped waveguide adapter according to claim 1, characterized in that the number of pins (2) is 3.

5. A T-shaped waveguide adapter according to claim 1, characterized in that the pin (2) is a cylindrical body with a circular cross-sectional shape; the tip of at least one pin (2) located within the waveguide (1) is rounded.

6. A T-shaped waveguide adapter according to claim 1, characterized in that a choke structure (4) is provided around at least one pin (2).