Waveguide T-junction power divider

Abstract

This invention discloses a waveguide T-junction power divider, comprising: an input waveguide, a first output waveguide and a second output waveguide perpendicular to and connected to the input waveguide, and a matching structure. The matching structure is disposed at the connection between the first and second output waveguides and at a position corresponding to the input waveguide. The matching structure is a groove with a pointed tip located inside the input waveguide. By setting the matching structure at the connection between the first and second output waveguides and at a position corresponding to the input waveguide, and with the tip of the matching structure located inside the input waveguide, this invention enables the waveguide T-junction power divider to have good isolation. Furthermore, the structure is simple and easy to design, and it can be milled in one step during processing, greatly reducing the difficulty of manufacturing and thus improving the accuracy and performance of the waveguide T-junction power divider.

Description

Technical Field

[0001] The present invention relates to a power divider, in particular to a waveguide T-junction power divider. Background Art

[0002] Power dividers and combiners are important components in microwave systems, used to distribute transmission power to different loads, or combine different powers into one path to obtain greater power. The performance of microwave power dividers, such as insertion loss, isolation, phase balance, and amplitude balance, will have a significant impact on the performance of the entire system.

[0003] Most of the existing waveguide T-junction power dividers generally use metal column structures and graded step structures to play the role of diversion and adjustment matching. However, these matching structures such as metal columns and graded steps make the waveguide T-junction power divider difficult to process, and it is difficult to ensure the precision requirements required by the waveguide T-junction power divider, thereby greatly reducing the performance of the waveguide T-junction power divider.

[0004] With regard to the problem that the accuracy and performance of waveguide T-junction power dividers in related technologies are difficult to ensure, no effective solution has been proposed so far. Summary of the invention

[0005] In view of the problem that it is difficult to ensure the accuracy and performance of a waveguide T-junction power divider in the related art, the present invention proposes a waveguide T-junction power divider, which can reduce the difficulty of processing and improve the accuracy and performance of the waveguide T-junction power divider.

[0006] The technical solution of the present invention is achieved in this way:

[0007] According to one aspect of the present invention, a waveguide T-junction power divider is provided, comprising: an input waveguide, a first output waveguide and a second output waveguide perpendicular to and connected to the input waveguide, and a matching structure; the matching structure is arranged at a position where the first output waveguide and the second output waveguide are connected and corresponding to the input waveguide, and the matching structure is a groove with a tip structure, and the tip is located inside the input waveguide.

[0008] Preferably, the matching structure is symmetrical with respect to the axis of the input waveguide.

[0009] Preferably, the cross-sectional line of the matching structure is a matching curve, and the matching curve is a curve obeying a normal distribution function.

[0010] Preferably, the input waveguide, the first output waveguide, and the second output waveguide are all rectangular waveguides.

[0011] Preferably, the input waveguide, the first output waveguide, and the second output waveguide are all substrate integrated waveguides.

[0012] Preferably, the first output waveguide further comprises: a first turning waveguide, through which the first output waveguide extends in a direction away from the input waveguide.

[0013] Preferably, the second output waveguide further comprises: a second turning waveguide, wherein the second turning waveguide enables the second output waveguide to extend in a direction away from the input waveguide.

[0014] Preferably, the outer chamfers of the first turning waveguide and the second turning waveguide are both 90-degree rounded corners.

[0015] Preferably, the inner chamfers of the first turning waveguide and the second turning waveguide are both 90-degree rounded angles.

[0016] Preferably, the substrate integrated waveguide comprises: a dielectric substrate; and a plurality of metal short pillars penetrating the dielectric substrate and arranged adjacent to each other.

[0017] The present invention connects the first output waveguide and the second output waveguide and sets a matching structure at a position corresponding to the input waveguide, and the tip of the matching structure is located inside the input waveguide, so that the waveguide T-junction power divider of the present invention has good isolation, simple structure, convenient design, and can be milled out at one time during the processing, which greatly reduces the difficulty of processing, thereby improving the accuracy and performance of the waveguide T-junction power divider. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] It should be noted that these drawings are intended to illustrate the general characteristics of methods, structures and / or materials used in certain exemplary embodiments and are used to supplement the textual description provided below. However, these drawings are not drawn to scale and may not accurately reflect the precise structure or performance characteristics of any given embodiment, and should not be interpreted as defining or limiting the scope of the meaning or attributes included by the exemplary embodiments. Similar or identical reference numerals used in multiple figures are intended to indicate similar or identical elements or components.

[0020] Figure 1 is a schematic structural diagram of a waveguide T-junction power divider according to an embodiment of the present invention;

[0021] Figure 2 is a schematic top view of a waveguide T-junction power divider according to another embodiment of the present invention;

[0022] Figure 3 yes Figure 2 Schematic cross-sectional view along the AA direction. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0024] According to an embodiment of the present invention, a waveguide T-junction power divider is provided.

[0025] like Figure 1 and Figure 2 As shown, the waveguide T-junction power divider according to an embodiment of the present invention includes: an input waveguide 10, and a first output waveguide 20 and a second output waveguide 30 located on the same plane as the input waveguide 10, perpendicular to the input waveguide 10 and connected to the input waveguide 10; a matching structure 40 is arranged at a position corresponding to the input waveguide 10 and connected to the first output waveguide 20 and the second output waveguide 30, and the matching structure 40 is a groove with a tip structure, and the tip is located inside the input waveguide 10.

[0026] The above technical solution, by setting the matching structure 40 at the position corresponding to the input waveguide 10 and the tip of the matching structure 40 is located inside the input waveguide 10, can make the waveguide T-junction power divider of the present invention have good isolation, simple structure, convenient design, low profile characteristics, and easy integration. It can be milled out at one time during the processing, which greatly reduces the difficulty of processing, thereby improving the accuracy and performance of the waveguide T-junction power divider.

[0027] like Figure 1 and Figure 2 As shown, the first output waveguide 20 may further include: a first turning waveguide 21, through which the first output waveguide 20 extends in a direction away from the input waveguide 10. The second output waveguide 30 may further include: a second turning waveguide 31, through which the second output waveguide 30 extends in a direction away from the input waveguide 10.

[0028] Preferably, the outer chamfers of the first turning waveguide 21 and the second turning waveguide 31 are both 90-degree rounded.

[0029] Preferably, the inner chamfers of the first turning waveguide 21 and the second turning waveguide 31 are both 90-degree fillets.

[0030] The input waveguide 10 passes through the matching structure 40, so that the electromagnetic wave passes through the 90-degree rounded bend of the first turning waveguide 21 and the second turning waveguide 31, and can output electromagnetic waves of equal amplitude and phase at two output ports in the same direction, and at the same time, the two output ports can have a high isolation.

[0031] According to one embodiment of the present invention, the matching structure 40 is symmetrical with respect to the axis of the input waveguide 10 .

[0032] Furthermore, the cross-sectional line of the matching structure 40 is a matching curve, and the matching curve is a normal distribution function curve. The formula of the normal distribution function is as shown in formula (1):

[0033]

[0034] Wherein, σ represents a standard deviation, which controls the vertex position of the matching curve, and the specific position of the tip of the matching structure 40 in the input waveguide 10 can be adjusted by the standard deviation σ;

[0035] μ represents expectation, which controls the position of the matching curve. The specific position of the matching structure 40 can be adjusted by the expected μ.

[0036] Furthermore, the power distribution effect and isolation of the waveguide T-junction power divider can be adjusted by configuring the matching structure 40 and the position of its tip inside the input waveguide 10. The power distribution effect may include phase balance and amplitude balance, that is, the phase balance and amplitude balance of the waveguide T-junction power divider can be adjusted by configuring the matching curve. Specifically, if the power distribution effect is good, the corresponding isolation will be poor, and similarly, if the isolation is good, the corresponding power distribution effect will be poor. The specific position of the matching structure 40 and its tip inside the input waveguide 10 can be designed according to needs.

[0037] By adjusting the two parameters of standard deviation σ and expected μ, the structural distribution of the matching curve can be obtained; and then the power distribution effect and isolation of the waveguide T-junction power divider of the present invention can be adjusted. Therefore, in the process of adjusting the waveguide T-junction power divider, since the two parameters of standard deviation σ and expected μ need to be adjusted, the complexity of adjustment is correspondingly reduced, and the design is easier.

[0038] like Figure 1 As shown, according to one embodiment of the present invention, the input waveguide 10, the first output waveguide 20, and the second output waveguide 30 are all rectangular waveguides.

[0039] like Figure 2 and Figure 3 As shown, according to one embodiment of the present invention, the input waveguide 10, the first output waveguide 20, and the second output waveguide 30 are all substrate integrated waveguides.

[0040] According to one embodiment of the present invention, a substrate integrated waveguide comprises: a dielectric substrate 50, and a plurality of metal short pillars 60 that penetrate the dielectric substrate 50 and are adjacently arranged. The substrate integrated waveguide can be easily integrated with a coplanar waveguide and the like, and has low loss. Electromagnetic waves can be transmitted in the channel formed by the plurality of metal short pillars 60, and when the electromagnetic waves are transmitted in the substrate integrated waveguide, their transmission characteristics are similar to those in a conventional rectangular waveguide.

[0041] In summary, with the help of the above technical solution of the present invention, by connecting the first output waveguide and the second output waveguide and setting a matching structure at a position corresponding to the input waveguide, and the tip of the matching structure is located inside the input waveguide, the waveguide T-junction power divider of the present invention can have good isolation, simple structure, convenient design, low profile characteristics, and easy integration. It can be milled out at one time during the processing, which greatly reduces the difficulty of processing, thereby improving the accuracy and performance of the waveguide T-junction power divider.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A waveguide T-junction power divider, comprising: An input waveguide, and a first output waveguide and a second output waveguide which are perpendicular to the input waveguide and connected to the input waveguide, characterized in that it also includes: A matching structure, wherein the matching structure is arranged at a position where the first output waveguide and the second output waveguide are connected and corresponding to the input waveguide, the matching structure is a groove having a tip structure, and the tip is located inside the input waveguide, the matching structure is symmetrical with respect to the axis of the input waveguide, the cross-sectional line of the matching structure is a matching curve, and the matching curve is a normal distribution function curve, Wherein, the first output waveguide further comprises: A first turning waveguide, through which the first output waveguide extends in a direction away from the input waveguide.

2. The waveguide T-junction power divider according to claim 1, characterized in that: The input waveguide, the first output waveguide, and the second output waveguide are all rectangular waveguides.

3. The waveguide T-junction power divider according to claim 1, characterized in that: The input waveguide, the first output waveguide, and the second output waveguide are all substrate integrated waveguides.

4. The waveguide T-junction power divider according to claim 1, characterized in that: The second output waveguide further comprises: and a second turning waveguide that extends the second output waveguide in a direction away from the input waveguide.

5. The waveguide T-junction power divider according to claim 4, characterized in that: The outer chamfers of the first turning waveguide and the second turning waveguide are both 90-degree rounded corners.

6. The waveguide T-junction power divider according to claim 5, characterized in that: The inner chamfers of the first turning waveguide and the second turning waveguide are both 90-degree rounded corners.

7. The waveguide T-junction power divider according to claim 3, characterized in that: The substrate integrated waveguide comprises: Dielectric substrate: and A plurality of metal short columns are arranged adjacent to each other and penetrate the dielectric substrate.

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