CN111834722A

CN111834722A - Double-side pin waveguide tuner

Info

Publication number: CN111834722A
Application number: CN202010685316.4A
Authority: CN
Inventors: 王清源
Original assignee: University of Electronic Science and Technology of China
Current assignee: University of Electronic Science and Technology of China
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2020-10-27

Abstract

The invention discloses a design scheme of a double-sided pin waveguide tuner, which comprises a waveguide section and at least two pins. The depth to which the pin protrudes into the waveguide may be adjustable externally from the waveguide. At least two of the pins are respectively disposed on an upper surface of the waveguide normal line in the Y direction and a lower surface of the waveguide normal line in the-Y direction. At least one nut is disposed around each of the pins. The waveguide is a rectangular waveguide, or a single-ridge rectangular waveguide, or a double-ridge rectangular waveguide. The axis of at least one of the pins is offset from the waveguide axis by 5% of the wavelength in free space. The tip of at least one pin within the waveguide is rounded. A choke groove structure is disposed around the at least one pin. The axial distance of the pins along the waveguide is 10% -30% of the wavelength of the waveguide. The invention is mainly used in microwave systems with high average power, in particular in the field of microwave energy industrial application.

Description

Double-side pin waveguide tuner

Technical Field

The invention relates to a microwave allocating device, in particular to a double-sided pin waveguide allocating device with high power capacity, enhanced allocating capacity and wide matching bandwidth.

Background

Load mismatch is a technical problem that often needs to be solved in designing microwave systems. Conventional waveguide tuners use three pins of adjustable depth spaced at quarter-wave waveguide wavelength along the waveguide axis to better meet the matching needs of many applications. However, the conventional waveguide tuner has the following disadvantages: since all the pins are arranged on the centre line of one broad side of the rectangular waveguide and the distance between the pins is fixed to about one quarter of the wavelength of the waveguide, the diameter of the pins is smaller, in particular less than 13% of the wavelength in free space at the centre frequency of the operating frequency band of the waveguide tuner, when a choke groove structure is arranged around each pin. The use of smaller diameter pins will directly limit the power capacity of the dispenser.

Disclosure of Invention

The invention aims to provide a double-sided pin waveguide tuner. In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a double-sided pin waveguide tuner comprises a waveguide with an axis along the Z direction and a wide edge along the X direction and at least one pin with an axis along the Y direction. The depth to which the pin protrudes into the waveguide may be adjustable externally from the waveguide. The X direction, the Y direction and the Z direction form a rectangular coordinate system.

To facilitate the use of larger diameter pins to increase the power capacity of the double-sided pin waveguide tuner, at least two of the pins are disposed on the upper surface of the waveguide normal to the Y-direction and the lower surface of the waveguide normal to the-Y-direction, respectively. In a preferred design, any two pins adjacent to each other in the Z direction are respectively arranged on the upper surface of the waveguide normal line in the Y direction and the lower surface of the waveguide normal line in the-Y direction.

In order to lock the pins after a determined depth of their penetration into the waveguide, at least one nut is arranged around each of said pins.

The waveguide is a rectangular waveguide. A metal ridge can also be arranged in the waveguide, and the waveguide is a single-ridge rectangular waveguide. Two metal ridges can be arranged in the waveguide, and the waveguide is a double-ridge rectangular waveguide.

To facilitate our use of larger diameter pins to increase the power capacity of the double-sided pin waveguide tuner without increasing the spacing in the Z-direction of adjacent pins in the Z-direction, the axis of at least one of the pins in the Y-direction is offset from the axis of the waveguide in the Z-direction by more than 5% of the wavelength in free space at the center frequency of the operating band of the double-sided pin waveguide tuner. In a preferred design, the axes of all of the pins in the Y-direction are offset from the axes of the waveguides in the Z-direction in the X-direction by a distance equal to 19% of the wavelength in free space at the center frequency of the operating band of the double-sided pin waveguide tuner. At this time, any three pins adjacent in the Z direction are located approximately at three vertices of an equilateral triangle.

To further increase the power capacity of the double-sided pin waveguide tuner, the tip of at least one pin within the waveguide is rounded. In a preferred design, the tips of all pins within the waveguide are rounded.

To prevent leakage of microwave energy from the gap between the pin and the waveguide while reducing conductor losses on the pin, a choke groove structure is provided around at least one pin.

Because the number of pins is increased among the pins of the traditional waveguide tuner, the matching bandwidth of the double-sided pin waveguide tuner can be widened, and the pins are arranged in a way that: the pins are sequentially arranged along the Z direction, and the distance between the axis of any two adjacent pins along the Z direction along the Y direction in the Z direction is 10-30% of the waveguide wavelength of the port of the double-sided pin waveguide tuner.

The invention discloses a design scheme of a double-sided pin waveguide tuner. By arranging adjacent pins on two opposite broad sides of the waveguide, respectively, space is created for arranging large diameter pins without increasing the spacing between adjacent pins in the direction of the waveguide axis. The invention is mainly used in microwave systems with high average power, in particular in the field of microwave energy industrial application.

Drawings

FIG. 1 is a schematic top view of example 1 of the present invention

FIG. 2 is a schematic cross-sectional view of the AA of FIG. 1

FIG. 3 is a schematic top view of embodiment 2 of the present invention

FIG. 4 is a schematic cross-sectional view of the AA of FIG. 3

FIG. 5 is a schematic top view of embodiment 3 of the present invention

FIG. 6 is a schematic cross-sectional view of the AA of FIG. 5

The reference numbers in the drawings correspond to the names: 1-waveguide, 2-pin, 3-nut, 4-choke groove structure, 5-metal ridge.

Some of the terms specified in this specification are as follows:

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

The vertical direction is the direction perpendicular to the horizontal plane.

The upper side is the Y direction.

The lower side is in the-Y direction.

And on the left, the X direction.

The right direction is the-X direction.

Detailed Description

Example 1

As shown in fig. 1 and 2.

A double-sided pin waveguide tuner comprises a waveguide 1 with an axis along the Z direction and a wide edge along the X direction and 6 pins 2 with axes along the Y direction. The depth to which the pin 2 protrudes into the waveguide 1 can be adjusted from the outside of the waveguide 1.

A nut 3 is provided around each of said pins 2.

The bottom of the waveguide 1 is provided with a metal ridge 5, and the waveguide 1 is a single-ridge rectangular waveguide.

The axis of each pin 2 in the Y direction is offset from the axis of the waveguide 1 in the Z direction in the X direction by more than 5% of the wavelength in free space at the centre frequency of the operating band of the two-sided pin waveguide tuner.

All the pins 2 have a circular cross-sectional shape.

The pins 2 are arranged in sequence along the Z direction. Any two of the pins 2 adjacent in the Z direction are arranged in the X direction and the-X direction of the axis of the waveguide 1 in the Z direction, respectively. Thus, all the pins are arranged in the direction Z in the direction X and in the direction-X of the broad side of the waveguide 1, their axes in the direction Y being located at the respective bends of a broken line.

Any two pins 2 adjacent in the Z direction are provided on the upper surface of the waveguide 1 with its normal line in the Y direction and the lower surface of the waveguide 1 with its normal line in the-Y direction, respectively.

The tips of all the pins 2 located inside the waveguide 1 are rounded.

Around each pin 2 a choke groove structure 4 is arranged.

The pins 2 are arranged in sequence along the Z direction. The distance between the axes of any two adjacent pins 2 along the Z direction along the Y direction in the Z direction is 10-30% of the waveguide wavelength of the port of the double-sided pin waveguide tuner.

Example 2

As shown in fig. 3 and 4.

A nut 3 is provided around each of said pins 2.

The bottom and the top of the waveguide 1 are provided with two metal ridges 5, and the waveguide 1 is a double-ridge rectangular waveguide.

All the pins 2 have a circular cross-sectional shape.

All the pins 2 are arranged in sequence along the Z direction. Any two of the pins 2 adjacent in the Z direction are arranged in the X direction and the-X direction of the axis of the waveguide 1 in the Z direction, respectively. Thus, all the pins are arranged in the direction Z in the direction X and in the direction-X of the broad side of the waveguide 1, their axes in the direction Y being located at the respective bends of a broken line.

The tips of all the pins 2 located inside the waveguide 1 are rounded.

Around each pin 2 a choke groove structure 4 is arranged.

Example 3

As shown in fig. 5 and 6.

A nut 3 is provided around each of said pins 2.

The waveguide 1 is a rectangular waveguide.

The cross-sectional shape of the pin 2 is circular.

The tips of all the pins 2 located inside the waveguide 1 are rounded.

Around each pin 2 a choke groove structure 4 is arranged.

3 embodiments of the invention are given above. The actual implementation is far more extensive than listed here. The double-sided pin waveguide tuner is generally finished by adopting a rectangular waveguide section through the working procedures of cutting, drilling, tapping and the like.

According to the double-sided pin waveguide tuner disclosed by the invention, different pins are respectively arranged on two wide edges of a waveguide, so that the diameter of the pin is increased, and the power capacity of the double-sided pin waveguide tuner is improved. The invention can be widely used in microwave systems with high average power, in particular in the field of microwave energy industrial application.

Claims

1. A double-sided pin waveguide tuner is characterized by comprising a waveguide (1) with a section of axis along the Z direction and a wide edge along the X direction and at least one pin (2) with an axis along the Y direction; the depth of the pin (2) extending into the waveguide (1) can be adjusted from the outside of the waveguide (1); at least two pins (2) in the pins (2) are respectively arranged on the upper surface of the normal line of the waveguide (1) along the Y direction and the lower surface of the normal line along the-Y direction; the X direction, the Y direction and the Z direction form a rectangular coordinate system.

2. A double-sided pin waveguide tuner as claimed in claim 1, wherein at least one nut (3) is provided around each pin (2); the depth of the nail (2) extending into the waveguide (1)) can be locked and fixed by the nut (3).

3. A double-sided pin waveguide coordinator according to claim 1, wherein the waveguide (1) is a rectangular waveguide.

4. A double-sided pin waveguide tuner as claimed in claim 1, wherein the waveguide (1) has a metal ridge (5) formed therein, which is a single-ridge rectangular waveguide.

5. A double-sided pin waveguide tuner as claimed in claim 1, wherein the waveguide (1) is provided with two metal ridges (5) in the form of a double-ridge rectangular waveguide.

6. A double-sided pin waveguide tuner as claimed in claim 1, wherein the axis of at least one of the pins (2) in the Y-direction is offset in the X-direction from the axis of the waveguide (1) in the Z-direction by a distance greater than 5% of the wavelength in free space at the center frequency of the operating band of the double-sided pin waveguide tuner.

7. A double-sided pin waveguide tuner as claimed in claim 1, wherein the tip of at least one pin (2) within the waveguide (1) is rounded.

8. A double-sided pin waveguide tuner as claimed in claim 1, wherein a choke groove structure (4) is provided around at least one pin (2).

9. A double-sided pin waveguide tuner as claimed in claim 1, wherein the pins (2) are arranged in sequence in the Z direction; the distance between the axes of any two adjacent pins (2) along the Z direction along the Y direction in the Z direction is 10-30% of the waveguide wavelength of the port of the double-sided pin waveguide tuner.