CN219106481U

CN219106481U - Ka-band-terminated coaxial waveguide converter

Info

Publication number: CN219106481U
Application number: CN202223460723.9U
Authority: CN
Inventors: 吴泽宇; 王宗豪; 孙金立
Original assignee: Nanjing Ruida Electronic Technology Co ltd
Current assignee: Nanjing Ruida Electronic Technology Co ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-05-30
Anticipated expiration: 2032-12-23

Abstract

The utility model discloses a Ka-band-terminated coaxial waveguide converter, which relates to the technical field of radio frequency microwaves and comprises a waveguide, a connector and an impedance matching step, wherein a cavity is arranged in the waveguide, the impedance matching step is a 4-level step, the impedance matching step is arranged in the waveguide cavity, and the connector is clamped with the waveguide. The utility model has the beneficial effects that the electric performance is better by adjusting and optimizing the impedance matching ladder; the use of non-standard waveguides allows for a smaller and more compact structure.

Description

Ka-band-terminated coaxial waveguide converter

Technical Field

The utility model relates to the technical field of radio frequency microwaves, in particular to a Ka-band-terminated coaxial waveguide converter.

Background

Most of the signal transmission in the rf microwave field requires transmission lines for signal transmission, wherein coaxial lines and waveguides are widely used for transmitting microwave rf energy. These two transmission lines have a large difference in size and material and transmission characteristics. Coaxial waveguide converters are required to interconnect the two transmission lines. With the development of technology, the application of high-frequency communication equipment, the requirement of a high-frequency coaxial waveguide converter is also increasing.

Existing waveguide coaxial converters generally consist of a connector, a waveguide, and an impedance matching step. The connector is usually selected from the applicable frequency band. As disclosed in chinese patent No. cn20090024313. X, a terminated coaxial waveguide converter includes a waveguide 1 and a step ladder impedance transformation block 2, a through slot is formed in a waveguide cavity of the waveguide 1, the through slot and an optical hole are on one side, and the width of the through slot is equal to the width of the step ladder impedance transformation block 2; the length of the step ladder impedance transformation block 2 is increased to be equal to the length of the waveguide tube 1, the increased part is a step, and the height of the step is equal to the depth of the through groove; the center line of the through groove coincides with the middle line of the waveguide cavity. The termination type coaxial waveguide converter structure provided by the utility model improves the product performance debugging qualification rate, saves the product debugging time, shortens the production period and reduces the production cost. The technical scheme has the following defects: the coaxial waveguide converter has large size, poor isolation and large loss.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides a Ka-band-terminated coaxial waveguide converter, which has better electrical performance by adjusting and optimizing an impedance matching ladder; by adopting the nonstandard waveguide, the structure is small and compact, so that the technical problem in the background technology is solved.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: a Ka-band-terminated coaxial waveguide converter comprises a waveguide, a connector and an impedance matching step, wherein a cavity is arranged in the waveguide, the impedance matching step is a 4-level step, the impedance matching step is arranged in the waveguide cavity, and the connector is clamped with the waveguide.

As a further description of the above technical solution: the connector comprises an insulator, a feed pin, a connecting piece and a tail part, wherein a first cavity is formed in the connecting piece, a second cavity is formed in the tail part, the insulator is arranged in the first cavity, the feed pin is arranged in the insulator, and the feed pin penetrates through the insulator and stretches into the second cavity.

As a further description of the above technical solution: the feed pin extends into the cavity of the waveguide and contacts the impedance matching step.

As a further description of the above technical solution: the tail part is provided with external threads.

As a further description of the above technical solution: the connecting piece is in a straight shape.

As a further description of the above technical solution: the connecting piece is arranged perpendicular to the tail part.

As a further description of the above technical solution: flanges are arranged at two ends of the connecting piece.

As a further description of the above technical solution: the bottom of the waveguide is provided with a mounting hole.

The utility model has the following beneficial effects:

1. the electrical performance is better through adjusting and optimizing the impedance matching ladder; the non-standard waveguide is adopted, so that the structure is small and compact;

2. the converter is suitable for a Ka wave band 33-36GHz, and the cut-off frequency of the SMA joint in the frequency band is generally lower than the lowest frequency of the Ka wave band, and a joint of 2.92mmm is selected. The 2.92mm connector not only meets the use requirement of frequency, but also can be interconnected with an SMA connector, thereby facilitating the subsequent debugging and testing.

Drawings

FIG. 1 is a schematic diagram of a feed pin and waveguide connection of the present utility model;

FIG. 2 is a schematic illustration of a connector and waveguide connection according to the present utility model;

FIG. 3 is a schematic view of the bottom of a waveguide of the present utility model;

FIG. 4 is a schematic view of a connector according to the present utility model;

FIG. 5 is a chart of standing wave ratio simulation results of the present utility model;

fig. 6 is a graph of the results of the transmission loss simulation for the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present utility model; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1-3, a Ka-band terminated coaxial waveguide converter comprises a waveguide 1, a connector 2 and an impedance matching step 3, wherein a cavity is arranged in the waveguide 1, the impedance matching step 3 is a 4-level step, the impedance matching step 3 is arranged in the cavity of the waveguide 1, and the connector 2 is clamped with the waveguide 1.

As shown in fig. 4, the connector 2 includes an insulator 21, a feeding pin 22, a connecting member 23 and a tail 24, wherein a first cavity is formed in the connecting member 23, a second cavity is formed in the tail 24, the insulator 21 is mounted in the first cavity, the feeding pin 22 is disposed in the insulator 21, and the feeding pin 22 penetrates through the insulator 21 and extends into the second cavity.

As shown in fig. 1, the feeding pin 22 protrudes into the cavity of the waveguide 1 and contacts the impedance matching step 3.

As shown in fig. 4: the tail 24 of the connector 2 is provided with external threads 241 for connection to other components.

As shown in fig. 4: the connecting piece 23 is in a shape of a straight line, the connecting piece 23 is perpendicular to the tail 24, and flanges 231 are arranged at two ends of the connecting piece 23.

As shown in fig. 3: the bottom of the waveguide 1 is provided with mounting holes 11 for fixing the waveguide 1 with other components.

The waveguide 1 of the present utility model adopts a nonstandard design. Thereby allowing the waveguide to be reduced in size and compact.

In consideration of the problem of end-fed standing wave matching, 4 steps are selected for the impedance matching (reflecting the power transmission relation between the input circuit and the output circuit), and the height length of each step is obtained by the initial value through a theoretical Chebyshev algorithm. Setting the joint position and the step size of 2.92mm, matching the distance between the step and the feed probe as parameters, setting a target value, and using the HFSS optimization function to simulate the utility model.

The standing wave ratio (used for indicating whether the antenna is matched with the electric wave transmitting station) results are shown in fig. 5, and the design is very good in matching and very small in input reflection energy as can be seen from the standing wave ratio.

The transmission loss simulation result is shown in fig. 6, and it can be seen from the transmission loss simulation result that the loss is very low, and the influence on the transmission attenuation of the signal energy is very small.

The working principle of the utility model is as follows: after the signal source sent by the radio frequency cable is input through the tail part of the connector of the Ka band-terminated coaxial waveguide converter, the signal is conveyed into the waveguide through the feed pin and is output after being converted through the waveguide.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. A Ka-band terminated coaxial waveguide transducer, characterized by: the novel high-power optical fiber comprises a waveguide (1), a connector (2) and an impedance matching step (3), wherein a cavity is arranged in the waveguide (1), the impedance matching step (3) is a 4-level step, the impedance matching step (3) is arranged in the cavity of the waveguide (1), and the connector (2) is clamped with the waveguide (1).

2. A Ka band terminated coaxial waveguide transducer according to claim 1, wherein: the connector (2) comprises an insulator (21), a feed needle (22), a connecting piece (23) and a tail part (24), wherein a first cavity is formed in the connecting piece (23), a second cavity is formed in the tail part (24), the insulator (21) is arranged in the first cavity, the feed needle (22) is arranged in the insulator (21), and the feed needle (22) penetrates through the insulator (21) and stretches into the second cavity.

3. A Ka band terminated coaxial waveguide transducer according to claim 2, wherein: the feed pin (22) extends into the cavity of the waveguide (1) and is in contact with the impedance matching step (3).

4. A Ka-band terminated coaxial waveguide converter according to claim 3, wherein: the tail (24) is provided with external threads (241).

5. A Ka-band terminated coaxial waveguide converter according to claim 3, wherein: the connecting piece (23) is in a straight shape.

6. A Ka band terminated coaxial waveguide transducer according to claim 5, wherein: the connecting piece (23) is arranged perpendicular to the tail part (24).

7. A Ka band terminated coaxial waveguide transducer according to claim 5, wherein: flanges (231) are arranged at two ends of the connecting piece (23).

8. A Ka band terminated coaxial waveguide transducer according to claim 1, wherein: the bottom of the waveguide (1) is provided with a mounting hole (11).