CN210926263U

CN210926263U - Microwave loader capable of absorbing waves in multiple sections

Info

Publication number: CN210926263U
Application number: CN201921316896.9U
Authority: CN
Inventors: 刘云
Original assignee: Yibin Taizhong Electronic Technology Co ltd
Current assignee: Yibin Taizhong Electronic Technology Co ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-07-03
Anticipated expiration: 2029-08-14

Abstract

The utility model relates to a microwave loader of ripples is inhaled to multistage belongs to microwave passive device technical field, and it includes the waveguide pipe to and set up the absorbent in the waveguide pipe, the axial interval setting of edge waveguide pipe behind the absorbent axial falls into the multistage. The utility model discloses fall into the multistage with the absorbent in the current waveguide to at the inside a plurality of sections that generate heat that form of waveguide, make the section dispersion that generates heat, avoid local high temperature, improve heat dispersion.

Description

Microwave loader capable of absorbing waves in multiple sections

Technical Field

The utility model relates to a microwave passive device technical field especially relates to a microwave loader of ripples is inhaled to multistage.

Background

Microwave elements known as waveguide loads are often used in the microwave field, including matched loads, mismatched loads, and the like. The main function of the waveguide load is to absorb microwave energy from a radio frequency signal transmission path and improve the matching performance of the circuit, and the waveguide load is widely applied to a microwave system and is an important passive device in radar equipment, accurate guidance and microwave test systems.

The matching load is one of the most commonly used components, which is a single-port component capable of absorbing almost all input power, and is generally composed of a waveguide and a material capable of absorbing microwave power, and can absorb useless signals while realizing a traveling wave state of a certain part of the system. In communication systems and microwave measurement systems, it is often necessary to match the load to establish the traveling wave state of the system. The necessity of applying a matched load is obvious, when an instrument and a radar are adjusted, the matched load is used as a fake antenna, so that electromagnetic waves radiated in space can be avoided, the exposure of a target is avoided, confidentiality is facilitated, and the interference to other equipment can be avoided; in engineering application, a load can be connected to an unused port to protect a transmitter, signal leakage is prevented from interfering other equipment, and influence of an useless signal on a system can be avoided when the load is used on a receiving component.

The waveguide load mainly depends on the absorber in the waveguide cavity to absorb the energy of the microwave signal, and the absorption of the energy causes the temperature of the absorber to be very high, even reaching thousands of degrees. The existing loader is only provided with the absorber at one end of the waveguide cavity, so that the sound absorption effect is poor, the local temperature in the waveguide cavity is too high, and the heat dissipation performance is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a microwave loader of ripples is inhaled to multistage falls into the multistage with the absorber in the waveguide, can strengthen the effect of burning heat.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the microwave loader for multi-section wave absorption comprises a waveguide tube and an absorber arranged in the waveguide tube, wherein the absorber is axially divided into a plurality of sections and then axially arranged at intervals along the waveguide tube.

Further, the front end of the forwardmost section of the absorber is aligned with the front end of the waveguide; the rear end of the rearmost segment of the absorber is aligned with the rear end of the waveguide.

Preferably, the absorption body is divided into at least 3-5 sections.

Further, the absorber is divided into a plurality of segments along the axial direction.

Furthermore, an axial cavity is formed in the absorber, the area of the front end face of the axial cavity is larger than that of the rear end face of the axial cavity, the front end of the axial cavity penetrates through the absorber, and the rear end of the axial cavity penetrates through or does not penetrate through the absorber.

Preferably, the axial cavity is centrally located in the absorbent body.

Further, the cross-sectional area of the axial cavity is gradually reduced from the front to the back.

Further preferably, the axial cavity is divided into a front section, a middle section and a rear section from front to back in sequence, the cross sections of the front section and the rear section are unchanged, and the cross section of the middle section from front to back is gradually reduced.

Further, the absorber becomes thinner gradually from front to back.

Wherein the outer wall of the absorber is attached to the inner wall of the waveguide; or a fastener is arranged between the outer wall of the absorber and the inner wall of the waveguide tube to fix the absorber and the waveguide tube.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses fall into the multistage with the absorbent in the current waveguide to at the inside a plurality of sections that generate heat that form of waveguide, make the section dispersion that generates heat, avoid local high temperature, improve heat dispersion.

Drawings

FIG. 1 is a schematic structural diagram of the first embodiment;

FIG. 2 is a schematic structural view of a three-dimensional view of an absorbent body according to the first embodiment;

FIG. 3 is a three-dimensional view of an absorbent body in the second embodiment;

FIG. 4 is a longitudinal sectional view of an absorbent body in the first embodiment;

FIG. 5 is a front view of an absorber in the second embodiment;

FIG. 6 is a longitudinal cross-sectional view of the microwave applicator of the second embodiment;

FIG. 7 is a longitudinal sectional view of the microwave applicator according to the third embodiment;

FIG. 8 is a longitudinal sectional view of an absorbent body in the fourth example;

FIG. 9 is a longitudinal sectional view of an absorbent body in the fifth example;

FIG. 10 is a front view of an absorbent body in the fifth embodiment;

FIG. 11 is a three-dimensional view of an absorbent body in the sixth example;

in the figure: 1-waveguide tube, 2-segment absorber, 3-axial cavity, 4-fastener, 31-front segment, 32-middle segment and 33-rear segment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.

Example one

As shown in fig. 1, the multistage microwave absorbing microwave loader disclosed in this embodiment includes a waveguide 1, and a plurality of segment absorbers 21 disposed in the waveguide 1, where the segment absorbers 21 are formed by axially splitting the same absorber 2. Most preferably, the absorbent body 2 is divided equally into a plurality of segments in the axial direction. The absorption body 2 is made of a microwave absorbing material which converts microwave energy into energy of other forms of movement by a physical mechanism of action and into thermal energy by dissipation of the movement, thus causing the temperature of the absorption body itself to rise.

The number of segment absorbers 21 is set as desired, including but not limited to 2, 3, 4, 5, 6, etc. The absorbers 2 are divided into a plurality of segments and sequentially arranged at intervals in the axial direction of the waveguide 1, preferably at equal intervals, while maintaining the original order.

In order to improve the versatility, the multi-stage microwave absorbing microwave load disclosed in this embodiment may be manufactured into standard waveguide ports of different specifications, such as BJ32, BJ48, BJ58, and the like. The shape of the absorption body 2 can be designed as desired. The absorption body 2 in this embodiment is in the shape of a conventional absorption body, for example in the shape of a wedge. In order to facilitate the installation of the wedge-shaped absorber 2, the waveguide tube 1 is rectangular, and the fixing mode can be bonding fixing.

The position of the segment absorber 21 in the waveguide 1 and the spacing distance between two adjacent segment absorbers 21 are set as necessary. The front end of the forwardmost segment absorber 21 in the present embodiment is aligned with the front end of the waveguide 1; the rear end of the rearmost segment absorber 21 is aligned with the rear end of the waveguide 1.

In the present embodiment, the absorber 2 is divided into a plurality of segments to form segment absorbers 21, and the segment absorbers 21 are arranged at intervals in the axial direction of the waveguide 1, so that a plurality of heat generation segments are formed inside the waveguide 1, the heat generation segments are dispersed, the heat dissipation performance is improved, and local over-high temperature is avoided.

Example two

The difference between this embodiment and the first embodiment is: the structure of the absorber is different in this embodiment. This example discloses a new absorbent body. As shown in fig. 3, 4 and 5, an axial cavity 3 is formed in the absorber 2, the area of the front end surface of the axial cavity 3 is larger than that of the rear end surface, and the front end of the axial cavity 3 penetrates through the absorber 2. As shown in fig. 4, the rear end of the axial cavity 3 does not penetrate the absorbent body 2 in this embodiment.

The cross section of the absorber 2 in this embodiment is rectangular, the cross section of the axial cavity 3 is rectangular, and the axial cavity 3 is provided in the center of the absorber 2. In this embodiment, the cross-sectional area of the axial cavity 3 gradually decreases from front to back, the longitudinal section of the axial cavity 3 on the vertical plane is an isosceles triangle, and the longitudinal section on the horizontal plane is a rectangle.

The absorbent body 2 becomes thinner from the front to the back. The longitudinal section of the absorber 2 on the vertical plane is isosceles trapezoid, and the longitudinal section on the horizontal plane is rectangular. The dimensions of the absorption body 2 and the axial cavity 3 are arranged appropriately as required.

As shown in fig. 6, in the present embodiment, the absorber 2 and the waveguide 1 are fixed to each other by a fastening member 4 between the outer wall of the absorber 2 and the inner wall of the waveguide 1. The fastening member 4 may be an adhesive tape wound around the segment absorber 21, and a plurality of layers of wound adhesive tapes are filled in a gap between the outer wall of the segment absorber 21 and the inner wall of the waveguide 1.

EXAMPLE III

The present embodiment is different from the second embodiment in that, as shown in fig. 7, the outer wall of the segment absorber 21 is attached to the inner wall of the waveguide 1.

Example four

The present embodiment is different from the second or third embodiment in that, as shown in fig. 8, the rear end of the axial cavity 3 penetrates the absorbent body 2 in the present embodiment.

EXAMPLE five

The present embodiment differs from embodiments two, three and four in that: as shown in fig. 9 and 10, in the present embodiment, the axial cavity 3 is sequentially divided into a front section 31, a middle section 32 and a rear section 33 from front to back, the cross sections of the front section 31 and the rear section 33 are not changed, and the cross section of the middle section 32 from front to back is gradually reduced.

EXAMPLE six

This embodiment differs from the five previous embodiments in that: as shown in fig. 11, the absorbent body 2 in this embodiment has a circular cross section.

Of course, the cross-sectional shape of the absorbent body 2 is not limited to a rectangle or a circle, and may be a polygonal shape such as a triangle or a rhombus, or an ellipse.

The utility model discloses fall into the multistage with the absorber in the waveguide to at the inside a plurality of sections that generate heat that form of waveguide, make the section dispersion that generates heat, avoid local high temperature, improve heat dispersion.

Of course, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and that such changes and modifications are intended to be included within the scope of the appended claims.

Claims

1. A multi-section wave-absorbing microwave loader comprises a waveguide tube and an absorber arranged in the waveguide tube, and is characterized in that the absorber is axially divided into a plurality of sections and then is arranged at intervals along the axial direction of the waveguide tube.

2. A microwave loader as claimed in claim 1, wherein: the front end of the forwardmost section of absorber is aligned with the front end of the waveguide; the rear end of the rearmost segment of the absorber is aligned with the rear end of the waveguide.

3. A microwave loader as claimed in claim 1, wherein: the absorption body is divided into at least 3-5 sections.

4. The multi-stage microwave absorbing microwave loader of claim 1, wherein: the absorber is divided into multiple segments along the axial direction.

5. A microwave loader as claimed in claim 1, 2, 3 or 4, wherein: an axial cavity is arranged in the absorber, the area of the front end face of the axial cavity is larger than that of the rear end face, the front end of the axial cavity penetrates through the absorber, and the rear end of the axial cavity penetrates through or does not penetrate through the absorber.

6. A microwave loader according to claim 5, wherein: the axial cavity is arranged in the center of the absorber.

7. A microwave loader according to claim 5, wherein: the cross-sectional area of the axial cavity is gradually reduced from front to back.

8. A microwave loader as claimed in claim 1, wherein: the axial cavity is divided into a front section, a middle section and a rear section from front to back in sequence, the cross sections of the front section and the rear section are unchanged, and the cross section of the middle section from front to back is gradually reduced.

9. A microwave loader as claimed in claim 6, 7 or 8, wherein: the absorbent becomes thinner gradually from front to back.

10. A microwave loader as claimed in claim 1, wherein: the outer wall of the absorber is attached to the inner wall of the waveguide tube; or a fastener is arranged between the outer wall of the absorber and the inner wall of the waveguide tube to fix the absorber and the waveguide tube.