Terahertz waveguide slot array antenna for inhibiting surface current and transmit-receive system

Abstract

The utility model discloses a terahertz waveguide slot array antenna for inhibiting surface current and a transmit-receive system. The terahertz waveguide slot array antenna comprises a lower cavity unit, a power divider and an upper cavity plate unit. Wherein the lower cavity unit is internally provided with a plurality of metal walls at intervals along the transverse direction of the lower cavity unit, the interior of the lower cavity unit is divided into a plurality of waveguide cavities by the plurality of metal walls, and the side wall of the lower cavity unit is provided with a feed waveguide port communicated with the interior of the lower cavity unit; the power divider is arranged in the lower cavity unit, the input end of the power divider is arranged corresponding to the feed waveguide port, and the output end of the power divider is arranged corresponding to the plurality of waveguide cavities; the upper cavity plate unit is arranged on the lower cavity unit, a plurality of rows of slits are formed in the upper cavity plate unit at intervals, each row of slits corresponds to one waveguide cavity, and a partition groove is formed between every two adjacent rows of slits. According to the utility model, the surface current of the upper cavity plate unit can be suppressed, and the influence of the surface current on antenna radiation characteristics is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and in particular to a terahertz waveguide slot array antenna and a transceiver system capable of suppressing surface current. Background Art

[0002] The development of high frequency band is the development direction of communication, radar and navigation, especially in the military field. The development of high frequency band is an inevitable trend. As the core component for transmitting and receiving electromagnetic signals, high frequency antenna technology is also an important development direction. High frequency antenna technology mainly includes dielectric substrate antenna technology and waveguide slot antenna technology. Due to the large propagation loss of electromagnetic wave signals in dielectric substrates, the gain of dielectric substrate antennas is relatively small, so the terahertz band antenna in the existing technology is still mainly metal waveguide slot antenna.

[0003] In the prior art, metal waveguide slot antennas are made by opening thin slits in an array on the waveguide wall, and the thin slits are arranged in a certain pattern, and finally electromagnetic waves are radiated outward from the thin slits. However, when electromagnetic waves are radiated outward from the thin slits, surface currents will be formed on the outer surface of the waveguide wall, which will undoubtedly have an adverse effect on the radiation characteristics of the antenna, that is, the surface current will have an adverse effect on the antenna pattern, causing the antenna pattern to be deformed.

[0004] Based on this, a new technical solution is needed. Utility Model Content

[0005] In view of this, the embodiments of the present invention provide a terahertz waveguide slot array antenna and a transceiver system for suppressing surface current, so as to at least solve the problem in the prior art that the surface current formed on the outer surface of the waveguide wall affects the antenna radiation characteristics.

[0006] The utility model embodiment provides the following technical solutions:

[0007] The present invention provides a terahertz waveguide slot array antenna for suppressing surface current, comprising:

[0008] A lower cavity unit, wherein the lower cavity unit is a hollow cavity structure, wherein a plurality of metal walls are arranged in the lower cavity unit at lateral intervals along the lower cavity unit, wherein the plurality of metal walls divide the interior of the lower cavity unit into a plurality of waveguide cavities, and a side wall of the lower cavity unit is provided with a feeding waveguide port communicating with the interior of the lower cavity unit;

[0009] A power divider, the power divider is arranged in the lower cavity unit, and the input end of the power divider is arranged corresponding to the feeding waveguide port, and the output end is arranged corresponding to the plurality of waveguide cavities, the power divider is used to divide the electromagnetic wave signal entering from the feeding waveguide port into multiple electromagnetic waves, and transmit the multiple electromagnetic waves to the corresponding waveguide cavities;

[0010] An upper cavity plate unit, wherein the upper cavity plate unit is arranged on the lower cavity unit, and a plurality of rows of fine slits are arranged at intervals on the upper cavity plate unit, each row of the fine slits is arranged corresponding to a waveguide cavity, and a partition groove is provided between adjacent rows of fine slits, and the partition groove is used to suppress the surface current formed on the upper cavity plate unit.

[0011] Furthermore, the partition groove is a non-through groove.

[0012] Furthermore, a partition groove is arranged corresponding to a metal wall, and when the partition groove is orthographically projected perpendicular to the upper cavity plate unit, the projection of the partition groove is within the surface range of the metal wall to prevent electromagnetic waves from radiating outward through the partition groove.

[0013] Furthermore, the partition groove is a rectangular structure, and the width of the partition groove is smaller than the width of the metal wall.

[0014] Furthermore, the partition groove is a rectangular groove, an arc-shaped groove, or a combination of a rectangular groove and an arc-shaped groove.

[0015] Furthermore, the length of the partition groove is greater than the length of the metal wall, so as to avoid the partition groove being unable to completely suppress the surface current formed on the upper cavity plate unit.

[0016] Further, one end of the metal wall is connected to the first side wall of the lower cavity unit, and the other end of the metal wall has a preset distance from the second side wall of the lower cavity unit, wherein the first side wall and the second side wall are opposite side walls of the lower cavity unit.

[0017] An embodiment of the utility model further provides a transceiver system, comprising any of the above-mentioned terahertz waveguide slot array antennas.

[0018] Compared with the prior art, the at least one technical solution adopted in the embodiment of the utility model can achieve the following beneficial effects:

[0019] The utility model discloses a terahertz waveguide slot array antenna for suppressing surface current. By arranging partition grooves between multiple columns of fine slots in the upper cavity plate unit, the surface current of the upper cavity plate unit can be suppressed, and the influence of the surface current on the antenna radiation characteristics is reduced, thereby solving the problem in the prior art that the surface current formed on the outer surface of the waveguide wall will affect the antenna radiation characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of assembling a terahertz waveguide slot array antenna for suppressing surface current according to an embodiment of the utility model;

[0022] Figure 2 A top view of a lower cavity unit in a terahertz waveguide slot array antenna for suppressing surface current according to an embodiment of the utility model;

[0023] Figure 3 The present invention is a top view of an upper cavity plate unit in a terahertz waveguide slot array antenna for suppressing surface current according to an embodiment of the present invention.

[0024] The accompanying drawings of the present utility model are as follows:

[0025] 10. Lower cavity unit; 11. Metal wall; 12. Waveguide cavity; 13. Feed waveguide port;

[0026] 20. Power divider;

[0027] 30. Upper cavity plate unit; 31. Slit; 32. Partition groove. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0029] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0030] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0031] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0032] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0033] The development of high frequency band is the development direction of communication, radar and navigation, especially military electronic technology. The development of high frequency band is an inevitable trend. As the core component for transmitting and receiving electromagnetic signals, high frequency antenna technology is also an important development direction. At present, high frequency antenna technology mainly includes dielectric substrate (PCB) antenna technology and waveguide slot antenna technology.

[0034] The frequency of the terahertz band is greater than 100GHz, and its electromagnetic wave signal has a large propagation loss in the dielectric substrate, resulting in a small gain of the dielectric substrate type antenna. Therefore, the current terahertz band antenna is still mainly a metal waveguide slot antenna. The waveguide slot antenna is a waveguide wall with fine slits 31, and the fine slits 31 are arranged in a certain pattern. The electromagnetic waves radiate outward from the fine slits 31. At the same time, surface currents will be formed on the outer surface of the waveguide wall, which will have an adverse effect on the radiation characteristics of the antenna, that is, it will have an adverse effect on the antenna radiation pattern, causing the antenna radiation pattern to deform. In order to make the antenna performance indicators reach the design value, the problem of surface current must be solved.

[0035] Based on this, this specification embodiment proposes a processing solution: Figure 1As shown, the utility model is a terahertz waveguide slot array antenna for suppressing surface current. By setting a partition groove 32 between multiple columns of fine slots 31 of the upper cavity plate unit 30, and then installing the upper cavity plate unit 30 into the lower cavity unit 10, the surface current of the upper cavity plate unit 30 can be suppressed, and the influence of the surface current on the antenna radiation characteristics can be reduced, thereby solving the problem in the prior art that the surface current formed on the outer surface of the waveguide wall will affect the antenna radiation characteristics.

[0036] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0037] Example 1

[0038] A terahertz waveguide slot array antenna for suppressing surface current according to an embodiment of the utility model comprises a lower cavity unit 10, a power divider 20 and an upper cavity plate unit 30. The lower cavity unit 10 is a hollow cavity structure, and a plurality of metal walls 11 are arranged in the lower cavity unit 10 along the lateral intervals of the lower cavity unit 10. The plurality of metal walls 11 divide the interior of the lower cavity unit 10 into a plurality of waveguide cavities 12, and a side wall of the lower cavity unit 10 is provided with a feeding waveguide port 13 connected to the interior of the lower cavity unit 10; the power divider 20 is arranged in the lower cavity unit 10, and the input end of the power divider 20 is arranged corresponding to the feeding waveguide port 13, and the output end is respectively connected to the plurality of waveguide cavities 12. 2 is arranged correspondingly, the power divider 20 is used to divide the electromagnetic wave signal entering from the feeding waveguide port 13 into multiple electromagnetic waves, and transmit the multiple electromagnetic waves to the corresponding waveguide cavity 12; the upper cavity plate unit 30 is arranged on the lower cavity unit 10, and a plurality of rows of fine slits 31 are arranged at intervals on the upper cavity plate unit 30, each row of fine slits 31 is arranged corresponding to a waveguide cavity 12, and a partition groove 32 is arranged between adjacent rows of fine slits 31, and the partition groove 32 is used to suppress the surface current formed on the upper cavity plate unit 30.

[0039] The waveguide cavity 12 of the lower cavity unit 10 is used to obtain the electromagnetic wave signal divided by the power divider 20 and reflect the electromagnetic wave signal to the upper cavity plate unit 30 so that the electromagnetic wave signal radiates outward from the slit 31 of the upper cavity plate unit 30 .

[0040] The metal wall 11 is used to suppress electromagnetic wave signals in different waveguide cavities 12 .

[0041] The number of metal walls 11 and waveguide cavities 12 can be flexibly set according to actual needs.

[0042] The number of the waveguide cavities 12 is equal to the number of electromagnetic waves split out from the output end of the power divider 20 .

[0043] The power divider 20 is used to divide the electromagnetic waves obtained from the feeding waveguide port 13 into multiple signals.

[0044] Specifically, after the electromagnetic wave signal enters the power divider 20 in the lower cavity unit 10 from the feeding waveguide port 13, the power divider 20 divides the electromagnetic wave signal into multiple electromagnetic waves, and transmits the multiple electromagnetic waves to multiple waveguide cavities 12 accordingly. Finally, the electromagnetic wave radiates outward through the multiple columns of fine slits 31 set on the upper cavity plate unit 30. Since the upper cavity plate unit 30 is provided with a partition groove 32, the surface current of the upper cavity plate unit 30 can be suppressed, thereby avoiding the decrease of antenna gain and the deformation of the antenna radiation pattern.

[0045] Furthermore, the partition groove 32 is a non-penetrating groove, that is, the partition groove 32 is not arranged to penetrate the upper cavity plate unit 30, and the partition groove 32 is opened on a side of the upper cavity plate unit 30 away from the waveguide cavity 12.

[0046] By setting the partition groove 32 as a non-penetrating groove, the electromagnetic wave signal inside the waveguide cavity 12 will not radiate outward through the partition groove 32 after being reflected.

[0047] Furthermore, a partition groove 32 is arranged corresponding to a metal wall 11, and when the partition groove 32 is projected perpendicular to the upper cavity plate unit 30, the projection of the partition groove 32 is within the surface range of the metal wall 11 to prevent electromagnetic waves from radiating outward through the partition groove 32.

[0048] Among them, by setting the partition groove 32 to correspond to the metal wall 11, the reflection of electromagnetic waves in the waveguide cavity 12 to the partition groove 32 can be reduced, thereby preventing the electromagnetic waves from passing through the partition groove 32. By setting the partition groove 32 to correspond to the metal wall 11, the partition groove 32 can also be prevented from affecting the arrangement and layout of the slits 31.

[0049] Among them, by locating the projections of the partition grooves 32 within the surface range of the metal wall 11, the electromagnetic waves can be completely radiated outward through the slits 31, thereby preventing the electromagnetic wave signals from radiating outward through the partition grooves 32 when the bottom wall of the partition grooves 32 is relatively thin.

[0050] Furthermore, the partition groove 32 may be a rectangular groove, an arc-shaped groove, or a combination of a rectangular groove and an arc-shaped groove.

[0051] Preferably, the partition groove 32 can be configured as a rectangular structure, and the width of the partition groove 32 is smaller than the width of the metal wall 11 .

[0052] The length of the partition groove 32 is greater than that of the metal wall 11 , that is, the length of the partition groove 32 is greater than that of the corresponding row of slits 31 , so as to prevent the partition groove 32 from being too short to completely suppress the surface current formed on the upper cavity plate unit 30 .

[0053] In some of the embodiments, one end of the metal wall 11 is connected to the first side wall of the lower cavity unit 10, and the other end of the metal wall 11 has a preset distance from the second side wall of the lower cavity unit 10, so that an installation space for the power divider 20 is formed in the lower cavity unit 10, and it is convenient for the power divider 20 to send the divided multi-path electromagnetic wave signals to the corresponding waveguide cavity 12.

[0054] The first side wall and the second side wall are opposite side walls of the lower cavity unit 10 .

[0055] The working principle of the utility model is as follows:

[0056] The lower cavity unit 10 is composed of a power divider 20 and n waveguide cavities 12. The electromagnetic wave enters the lower cavity unit 10 from the feeding waveguide port 13, and passes through the power divider 20 to divide the electromagnetic wave into n electromagnetic waves according to a certain power ratio, and the n electromagnetic waves enter the n waveguide cavities 12 respectively. Since n columns of slits 31 are provided on the upper cavity plate, and each column of slits 31 is set to m, the electromagnetic waves in the waveguide cavity 12 will radiate outward through the slits 31. Because the current will leak from the slits 31, a surface current will be formed on the outer surface of the antenna. At this time, the partition groove 32 can suppress the diffusion of the surface current to cut off the surface current.

[0057] The utility model provides a partition groove 32 on the side of the fine slot 31 of the waveguide slot array antenna to suppress the surface current of the antenna, thereby solving the problem in the prior art that the waveguide slot array antenna is affected by the surface current, resulting in a decrease in antenna gain and deformation of the antenna pattern, and can greatly reduce the influence of the surface current on the antenna pattern, so that the electrical performance indicators of the antenna are improved.

[0058] Example 2

[0059] An embodiment of the utility model further provides a transceiver system, comprising the terahertz waveguide slot array antenna as described in any one of Embodiment 1.

[0060] The transceiver system also includes a receiving antenna assembly to receive electromagnetic waves radiated outwardly by the terahertz waveguide slot array antenna.

[0061] In this specification, the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the product embodiment described later, since it corresponds to the method, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0062] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A terahertz waveguide slot array antenna for suppressing surface current, characterized in that: include: A lower cavity unit, wherein the lower cavity unit is a hollow cavity structure, wherein a plurality of metal walls are arranged in the lower cavity unit at lateral intervals along the lower cavity unit, wherein the plurality of metal walls divide the interior of the lower cavity unit into a plurality of waveguide cavities, and a side wall of the lower cavity unit is provided with a feeding waveguide port communicating with the interior of the lower cavity unit; A power divider, the power divider is arranged in the lower cavity unit, and the input end of the power divider is arranged corresponding to the feeding waveguide port, and the output end is arranged corresponding to the plurality of waveguide cavities, the power divider is used to divide the electromagnetic wave signal entering from the feeding waveguide port into multiple electromagnetic waves, and transmit the multiple electromagnetic waves to the corresponding waveguide cavities; An upper cavity plate unit, wherein the upper cavity plate unit is arranged on the lower cavity unit, and a plurality of rows of fine slits are arranged at intervals on the upper cavity plate unit, each row of the fine slits is arranged corresponding to a waveguide cavity, and a partition groove is provided between adjacent rows of the fine slits, and the partition groove is used to suppress the surface current formed on the upper cavity plate unit.

2. The terahertz waveguide slot array antenna according to claim 1, characterized in that: The partition groove is a non-through groove.

3. The terahertz waveguide slot array antenna according to claim 1, characterized in that: A partition groove is arranged corresponding to a metal wall, and when the partition groove is projected perpendicularly to the upper cavity plate unit, the projection of the partition groove is within the surface range of the metal wall to prevent electromagnetic waves from radiating outward through the partition groove.

4. The terahertz waveguide slot array antenna according to claim 3, characterized in that: The partition groove is a rectangular structure, and the width of the partition groove is smaller than the width of the metal wall.

5. The terahertz waveguide slot array antenna according to claim 3, characterized in that: The partition groove is a rectangular groove, an arc groove or a combination of a rectangular groove and an arc groove.

6. The terahertz waveguide slot array antenna according to any one of claims 1 to 5, characterized in that: The length of the partition groove is greater than the length of the metal wall, so as to prevent the partition groove from failing to completely suppress the surface current formed on the upper cavity plate unit.

7. The terahertz waveguide slot array antenna according to claim 1, characterized in that: One end of the metal wall is connected to the first side wall of the lower cavity unit, and the other end of the metal wall has a preset distance from the second side wall of the lower cavity unit, wherein the first side wall and the second side wall are opposite side walls of the lower cavity unit.

8. A transceiver system, characterized in that: It comprises the terahertz waveguide slot array antenna as described in any one of claims 1 to 7.

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