CN111834723A

CN111834723A - Single ridge waveguide tuner

Info

Publication number: CN111834723A
Application number: CN202010685319.8A
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 single-ridge waveguide tuner, which comprises a waveguide with a section of 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. A metal ridge is arranged in the waveguide and is a single-ridge rectangular waveguide. The depth to which the pin protrudes into the waveguide may be adjustable externally from the waveguide. At least one nut is disposed about each of the pins. 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 in the X-direction by more than 5% of the wavelength in free space at the center frequency of the operating band of the single-ridge waveguide tuner. The tip of at least one pin within the waveguide is rounded. 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 invention will be mainly used in high average power microwave systems, especially in the field of ultra wide band microwave applications.

Description

Single ridge waveguide tuner

Technical Field

The invention relates to a microwave allocating device, in particular to a single ridge waveguide pin 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. Single-ridge waveguides are often used in ultra-wideband microwave systems. The traditional scheme realizes the single-ridge waveguide tuner and has the following defects: 1) if a pin is placed on the centerline of the waveguide broadside loaded with a metal ridge, the pin passes through the metal ridge, and the diameter of the pin is smaller, resulting in a reduced power capability of the device. If the size of the pin is increased, the pin screw hole will destroy the metal ridge, affecting the transmission function of the ridge waveguide. 2) If a pin is arranged on the central line opposite to the wide side of the waveguide loaded with the metal ridge, the pin has limited depth extending into the single-ridge waveguide, and the top end of the pin is easy to touch the metal ridge to cause short circuit and breakdown, thereby damaging the device.

Disclosure of Invention

It is an object of the present invention to provide a single-ridge waveguide tuner. In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a single ridge 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.

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.

A metal ridge is arranged in the waveguide and is a single-ridge rectangular waveguide.

To facilitate the use of pins with larger diameters to increase the power capacity of the single-ridge waveguide tuner, 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 a distance greater than 5% of the wavelength in free space at the center frequency of the operating frequency band of the single-ridge waveguide tuner. In a preferred design, the axes of all the pins along the Y direction are arranged at the center position of one side of the single-ridge rectangular waveguide except the width of the metal ridge in the X direction.

To further increase the power capacity of the single-ridge 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 single-ridge waveguide tuner can be widened, and the pins are arranged in a way that: all 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 single-ridge waveguide tuner.

The invention discloses a design scheme of a single-ridge waveguide tuner. By arranging adjacent pins on two sides of the single-ridge waveguide respectively by deviating the centers of the wide sides of the single-ridge waveguide, space is created for arranging the large-diameter pins. The invention will be mainly used in high average power microwave systems, especially in the field of ultra wide band microwave applications.

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

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 single ridge 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 in the X direction from the axis of the waveguide 1 in the Z direction by more than 5% of the wavelength in free space at the center frequency of the operating band of the single-ridge waveguide tuner.

Each pin 2 has 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.

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 single-ridge waveguide tuner.

Example 2

As shown in fig. 3 and 4.

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

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

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.

2 embodiments of the invention are given above. The actual implementation is far more extensive than listed here. The single-ridge 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 single-ridge waveguide tuner disclosed by the invention, the pin is arranged in a manner of deviating from the center of the wide side of the waveguide, so that the diameter of the pin can be increased, and the power capacity of the single-ridge waveguide tuner can be improved. The invention will be mainly used in high average power microwave systems, especially in the field of ultra wide band microwave applications.

Claims

1. A single ridge waveguide tuner, characterized by comprising a waveguide (1) with an 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); a metal ridge (5) is arranged in the waveguide (1) and is a single-ridge rectangular waveguide; the X direction, the Y direction and the Z direction form a rectangular coordinate system.

2. A single ridge 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 single-ridge waveguide tuner as claimed in claim 1, wherein the axis of at least one of the pins (2) in the Y-direction is offset 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 centre frequency of the operating band of the single-ridge waveguide tuner.

4. A single ridge waveguide tuner as claimed in claim 1, wherein the tip of at least one pin (2) within the waveguide (1) is rounded.

5. A single ridge waveguide tuner as claimed in claim 1, wherein a choke groove structure (4) is provided around at least one pin (2).

6. A single ridge waveguide tuner as claimed in claim 1, wherein said 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 single-ridge waveguide tuner.