Waveguide assembly and radar system

Abstract

The invention provides a waveguide assembly and a radar system. The waveguide assembly comprises a waveguide plate, a waveguide channel is formed in the first side of the waveguide plate, the waveguide assembly is of an integrally-formed structure, the waveguide assembly further comprises a first electromagnetic band gap structure and a second electromagnetic band gap structure, and the first electromagnetic band gap structure and the second electromagnetic band gap structure are both connected to the first side of the waveguide plate. The first electromagnetic band gap structure and the second electromagnetic band gap structure are arranged on the two sides of the waveguide channel respectively, and the first electromagnetic band gap structure and the second electromagnetic band gap structure are arranged in the extending direction of the waveguide channel. In addition, a shielding plate does not need to be added, and the waveguide assembly is of an integrally formed structure, so that the processing complexity of the waveguide assembly and the complexity of PCB design are relatively low.

Description

Technical Field

[0001] The present disclosure relates to the technical field of radar systems, and in particular to a waveguide component and a radar system. Background Art

[0002] Currently in the field of vehicle-mounted 4D millimeter-wave radar systems, radar systems mainly use PCB antennas. With the launch of a new generation of vehicle-mounted 4D radar system ARS548, the antenna form has gradually shifted from PCB antennas to waveguide antennas. It is foreseeable that in the field of vehicle-mounted radar systems, waveguide antennas will gradually become the mainstream antenna trend in the future, and will be expanded to other communication fields.

[0003] In the related art, for example, CN114430618A-a high-frequency circuit with a circuit board and a waveguide structure, the waveguide antenna mainly includes a waveguide structure, a circuit board and a protective cover. The waveguide structure forms a waveguide channel. In order to avoid leakage of electromagnetic waves, the waveguide channel needs to be sealed. When actually making the waveguide channel, there are two ways to seal the waveguide channel. In one of the methods, during production, the waveguide structure is divided into a first waveguide structure and a second waveguide structure and formed separately, that is, the waveguide structure is a two-layer structure, and then the two are welded and assembled together, so that the first waveguide structure and the second waveguide structure are closed to form a waveguide channel. In another method, a waveguide channel is formed on one side of the waveguide structure, and is connected to one side of the waveguide structure through a metal plate or a PCB board, so that the metal plate or the PCB board seals the waveguide channel.

[0004] However, in the first method, the waveguide structure needs to be designed as a two-layer waveguide structure and formed separately, and the two-layer waveguide structure needs to be assembled together later, which results in low manufacturing efficiency of the radar system. In addition, since it is necessary to ensure that the two-layer waveguide structure is closely matched, the processing accuracy of the two-layer waveguide structure is relatively high, resulting in increased processing complexity of the radar system. In the second method, although the waveguide structure is a single-layer structure, an additional shielding plate is required as a sealing carrier, such as a metal plate, PCB board, etc., which also results in low manufacturing efficiency of the radar system. In addition, since it is necessary to ensure that the shielding plate is closely matched with the waveguide structure, the processing accuracy of the shielding plate is relatively high, which also results in greater processing complexity of the radar system. Summary of the invention

[0005] The purpose of the present disclosure is to overcome the deficiencies in the prior art and to provide a waveguide component and a radar system that improve the manufacturing efficiency of the radar system and reduce the processing complexity of the radar system.

[0006] The purpose of this disclosure is achieved through the following technical solutions:

[0007] A waveguide component comprises a waveguide plate, a first side of the waveguide plate is formed with a waveguide channel, the waveguide component is an integrally formed structure, the waveguide component also comprises a first electromagnetic bandgap structure and a second electromagnetic bandgap structure, the first electromagnetic bandgap structure and the second electromagnetic bandgap structure are both connected to the first side of the waveguide plate, the first electromagnetic bandgap structure and the second electromagnetic bandgap structure are respectively arranged on both sides of the waveguide channel, and the first electromagnetic bandgap structure and the second electromagnetic bandgap structure are both arranged along the extension direction of the waveguide channel.

[0008] In some embodiments, the first electromagnetic bandgap structure includes a bandgap boss connected to a first side of the waveguide plate, and the bandgap boss is located at a first side of the waveguide channel.

[0009] In some embodiments, the first electromagnetic bandgap structure further includes a plurality of first columns, each of which is connected to a first side of the waveguide plate, each of which is located on a side of the bandgap boss away from the waveguide channel, and the plurality of first columns are arranged in an array along an extension direction of the bandgap boss.

[0010] In some embodiments, the second bandgap structure includes second columns, each of which is connected to the first side of the waveguide plate, each of which is located on the second side of the waveguide channel, and a plurality of second columns are arranged in an array along the extension direction of the waveguide channel.

[0011] In some embodiments, the second bandgap structure further includes a plurality of third columns arranged in an array, each of the third columns is connected to the first side of the waveguide plate, and each of the third columns is located on a side of the second column away from the waveguide channel.

[0012] In some of the embodiments, the waveguide component further comprises a ridge waveguide connected to the first side of the waveguide plate, the ridge waveguide forming a coupling region, and the coupling region communicating with an output end of the waveguide channel.

[0013] In some embodiments, the ridge waveguide includes two feeding elements, the two feeding elements are respectively connected to the first side of the waveguide plate, the two feeding elements are symmetrically arranged on both sides of the waveguide channel, and the coupling region is formed between the two feeding elements.

[0014] In some of the embodiments, each of the feeders includes a guide boss and an enclosure absorption member, the first end of the guide boss of each of the feeders is arranged corresponding to the output end of the waveguide channel, the enclosure absorption member of each of the feeders is connected to the second end of the corresponding guide boss, the thickness of the enclosure absorption member of each of the feeders is greater than the thickness of the corresponding guide boss, and the enclosure absorption member of each of the feeders is formed with an enclosure groove on one side adjacent to the corresponding guide boss, and the second end of the guide boss of each of the feeders is accommodated in the corresponding enclosure groove; the coupling zone is formed between the first ends of the guide bosses of two of the feeders.

[0015] In some embodiments, each of the feeding elements further includes two blocking portions, each of the blocking portions is connected to the first side of the waveguide plate, and the two blocking portions of each of the feeding elements are respectively located on two sides of the corresponding guide boss.

[0016] A radar system comprises the waveguide assembly described in any one of the above embodiments.

[0017] Compared with the prior art, the present invention has at least the following advantages:

[0018] Since the first electromagnetic bandgap structure and the second electromagnetic bandgap structure are respectively arranged on both sides of the waveguide channel, and the first electromagnetic bandgap structure and the second electromagnetic bandgap structure are both arranged along the extension direction of the waveguide channel, the first electromagnetic bandgap structure and the second electromagnetic bandgap structure are respectively blocked on both sides of the opening of the waveguide channel, so that the first electromagnetic bandgap structure and the second electromagnetic bandgap structure jointly play a role of high-impedance surface suppression, that is, the first electromagnetic bandgap structure and the second electromagnetic bandgap structure jointly suppress the problem of electromagnetic wave leakage in the waveguide channel, thereby reducing the amount of electromagnetic wave leakage in the waveguide channel, that is, most of the electromagnetic energy is effectively transmitted, so that the waveguide channel does not need to be sealed, and thus the waveguide component does not need to be additionally provided with a shielding plate; and since the waveguide component is an integrated molding structure, there is no need to assemble the waveguide component, thereby improving the manufacturing efficiency of the radar system and reducing the processing complexity of the radar system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a schematic structural diagram of a waveguide assembly according to an embodiment;

[0021] Figure 2 for Figure 1An enlarged schematic diagram of the waveguide assembly shown at A;

[0022] Figure 3 for Figure 2 An enlarged schematic diagram of the waveguide assembly shown at B;

[0023] Figure 4 for Figure 1 The field pattern comparison diagram of the waveguide assembly shown and the traditional waveguide;

[0024] Figure 5 for Figure 1 The schematic diagram of the structure of the radar system shown;

[0025] Figure 6 for Figure 5 A cross-sectional view of the radar system along line CC is shown;

[0026] Figure 7 for Figure 5 Schematic diagram of the partial structure of the radar system shown.

[0027] Reference numerals: 10, waveguide assembly;

[0028] 100, waveguide plate; 101, waveguide channel; 102, shielding slot;

[0029] 200, first electromagnetic bandgap structure; 210, bandgap boss; 220, first column;

[0030] 300, second electromagnetic band gap structure; 310, second column; 320, third column;

[0031] 400, ridge waveguide; 410, feeder; 411, guide boss; 4111, step structure; 412, enclosure absorber; 4121, enclosure groove; 413, blocking portion; 4131, blocking column;

[0032] 500, matching boss;

[0033] 20. Metal cover; 201. Radiation gap; 202. Suppression gap;

[0034] 30, circuit board; 600, microstrip line;

[0035] 40. Chip. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] The present disclosure provides a waveguide component, including a waveguide plate, a waveguide channel is formed on the first side of the waveguide plate, the waveguide component is an integrated structure, the waveguide component also includes a first electromagnetic bandgap structure and a second electromagnetic bandgap structure, the first electromagnetic bandgap structure and the second electromagnetic bandgap structure are both connected to the first side of the waveguide plate, the first electromagnetic bandgap structure and the second electromagnetic bandgap structure are respectively arranged on both sides of the waveguide channel, and the first electromagnetic bandgap structure and the second electromagnetic bandgap structure are both arranged along the extension direction of the waveguide channel. The present disclosure also provides a radar system, including the above-mentioned waveguide component.

[0040] In the above-mentioned waveguide component and radar system, since the first electromagnetic bandgap structure and the second electromagnetic bandgap structure are respectively arranged on both sides of the waveguide channel, the first electromagnetic bandgap structure and the second electromagnetic bandgap structure are both arranged along the extension direction of the waveguide channel, so that the first electromagnetic bandgap structure and the second electromagnetic bandgap structure are respectively blocked on both sides of the opening of the waveguide channel, so that the first electromagnetic bandgap structure and the second electromagnetic bandgap structure jointly play a role in high-impedance surface suppression, that is, the first electromagnetic bandgap structure and the second electromagnetic bandgap structure jointly suppress the problem of electromagnetic wave leakage in the waveguide channel, thereby making the electromagnetic wave leakage amount of the waveguide channel small, that is, most of the electromagnetic energy is effectively transmitted, so that the waveguide channel does not need to be sealed, and thus the waveguide component does not need to add an additional shielding plate; and since the waveguide component is an integrated molding structure, there is no need to assemble the waveguide component, thereby improving the manufacturing efficiency of the radar system and reducing the processing complexity of the radar system.

[0041] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0042] like Figures 1 to 3As shown, a waveguide component 10 of an embodiment includes a waveguide plate 100, and a waveguide channel 101 is formed on a first side of the waveguide plate 100. The waveguide component 10 is an integrally formed structure, and the waveguide component 10 also includes a first electromagnetic bandgap structure 200 and a second electromagnetic bandgap structure 300, the first electromagnetic bandgap structure 200 and the second electromagnetic bandgap structure 300 are both protrudingly connected to the first side of the waveguide plate 100, the first electromagnetic bandgap structure 200 and the second electromagnetic bandgap structure 300 are respectively arranged on both sides of the waveguide channel 101, and the first electromagnetic bandgap structure 200 and the second electromagnetic bandgap structure 300 are both arranged along the extension direction of the waveguide channel 101, that is, the first electromagnetic bandgap structure 200 and the second electromagnetic bandgap structure 300 are respectively blocked on both sides of the opening of the waveguide channel 101.

[0043] like Figure 4 As shown, in this embodiment, the electromagnetic wave mode of the waveguide component 10 is TE 10 The waveguide assembly 10 is half of the electromagnetic wave mode of the conventional waveguide, so that the waveguide assembly 10 constitutes a half-mode waveguide. The electric field of the half-mode waveguide on the wide side is only half of that of the conventional waveguide, and the maximum electric field is at the edge. Because the edge is not closed, there is a small amount of field leakage at the edge, but most of the electromagnetic energy is effectively transmitted, so that the waveguide channel 101 does not need to be sealed.

[0044] In the above-mentioned waveguide component 10, since the first electromagnetic bandgap structure 200 and the second electromagnetic bandgap structure 300 are respectively arranged on both sides of the waveguide channel 101, the first electromagnetic bandgap structure 200 and the second electromagnetic bandgap structure 300 are both arranged along the extension direction of the waveguide channel 101, so that the first electromagnetic bandgap structure 200 and the second electromagnetic bandgap structure 300 are respectively blocked on both sides of the opening of the waveguide channel 101, so that the first electromagnetic bandgap structure 200 and the second electromagnetic bandgap structure 300 jointly play a role of high impedance surface suppression, that is, the first electromagnetic bandgap structure 200 and the second electromagnetic bandgap structure 300 jointly suppress the electromagnetic wave leakage problem of the waveguide channel 101, thereby making the electromagnetic wave leakage amount of the waveguide channel 101 small, that is, most of the electromagnetic energy is effectively transmitted, so that the waveguide channel 101 does not need to be sealed, and thus the waveguide component 10 does not need to add an additional shielding plate; and since the waveguide component 10 is an integrated structure, there is no need to assemble the waveguide component 10, thereby improving the manufacturing efficiency of the radar system and reducing the processing complexity of the radar system.

[0045] like Figure 2 and Figure 3As shown, in some embodiments, the first electromagnetic bandgap structure 200 includes a bandgap boss 210, the bandgap boss 210 is connected to the first side of the waveguide plate 100, and the bandgap boss 210 is located at the first side of the waveguide channel 101. In this embodiment, the bandgap boss 210 prevents electromagnetic waves from leaking to the first side of the waveguide channel 101, thereby suppressing the problem of electromagnetic wave leakage in the waveguide channel 101 and improving the performance of the waveguide component 10.

[0046] like Figure 2 and Figure 3 As shown, in some embodiments, the first electromagnetic bandgap structure 200 also includes a plurality of first columns 220, each of the first columns 220 is connected to the first side of the waveguide plate 100, each of the first columns 220 is located on the side of the bandgap boss 210 away from the waveguide channel 101, and the plurality of first columns 220 are arranged in an array along the extension direction of the bandgap boss 210, so that periodically arranged columns are arranged on the side of the bandgap boss 210 away from the waveguide channel 101, thereby further suppressing the problem of electromagnetic waves leaking to the first side of the waveguide channel 101 and improving the performance of the waveguide component 10.

[0047] like Figure 2 and Figure 3 As shown, further, the first column 220 is a cylinder, which reduces the difficulty of molding the waveguide component 10. Of course, in other embodiments, the first column 220 can also be a prism or other existing protruding structures.

[0048] like Figure 2 and Figure 3 As shown, in some embodiments, the second electromagnetic bandgap structure 300 includes second columns 310, each second column 310 is connected to the first side of the waveguide plate 100, each second column 310 is located on the second side of the waveguide channel 101, and a plurality of second columns 310 are arranged in an array along the extension direction of the waveguide channel 101 to form periodically arranged columns on the second side of the waveguide channel 101, thereby suppressing the problem of electromagnetic waves leaking to the second side of the waveguide channel 101.

[0049] like Figure 2 and Figure 3 As shown, further, the second column 310 is a cylinder, which reduces the difficulty of molding the waveguide component 10. Of course, in other embodiments, the second column 310 can also be a prism or other existing protruding structures.

[0050] like Figure 2 and Figure 3As shown, in some embodiments, the second electromagnetic bandgap structure 300 also includes a plurality of third columns 320 arranged in an array, each third column 320 is connected to the first side of the waveguide plate 100, and each third column 320 is located on the side of the second column 310 away from the waveguide channel 101, so as to form a periodic column on the side of the second column 310 away from the waveguide channel 101, further suppressing the problem of electromagnetic waves leaking to the second side of the waveguide channel 101, thereby improving the performance of the waveguide component 10.

[0051] like Figure 2 and Figure 3 As shown, further, the third column 320 is a cylinder, which reduces the difficulty of molding the waveguide component 10. Of course, in other embodiments, the third column 320 can also be a prism or other existing protruding structures.

[0052] like Figure 2 and Figure 3 As shown, in some embodiments, the waveguide assembly 10 further includes a ridge waveguide 400, which is connected to the first side of the waveguide plate 100, and the ridge waveguide 400 is formed with a coupling region, and the output end coupling region of the waveguide channel 101 is connected to the output end of the waveguide channel 101, so that the electromagnetic waves of the waveguide channel 101 are conducted to the ridge waveguide 400, and the ridge waveguide 400 is used to transmit the electromagnetic waves in the waveguide channel 101 to the outside, such as the radiation slot 201 antenna. In this embodiment, the ridge waveguide 400 is used for feeding, so as to reduce the size of the waveguide feeding.

[0053] like Figure 2 and Figure 3 As shown, in some embodiments, the ridge waveguide 400 includes two feeds 410, the two feeds 410 are respectively connected to the first side of the waveguide plate 100, the two feeds 410 are symmetrically arranged on both sides of the waveguide channel 101, and the coupling region is formed between the two feeds 410. In this embodiment, the two feeds 410 are symmetrically arranged on both sides of the waveguide channel 101, so that the electromagnetic waves are transmitted from the coupling region to the two feeds 410, that is, the electromagnetic waves are transmitted from the coupling region to both sides of the waveguide channel 101.

[0054] like Figure 2 and Figure 3As shown, in some embodiments, each feeder 410 includes a guide boss 411 and a blocking absorber 412, the first end of the guide boss 411 of each feeder 410 is arranged corresponding to the output end of the waveguide channel 101, the blocking absorber 412 of each feeder 410 is connected to the second end of the corresponding guide boss 411, the thickness of the blocking absorber 412 of each feeder 410 is greater than the thickness of the corresponding guide boss 411, and a blocking groove 4121 is formed on one side of the blocking absorber 412 of each feeder 410 adjacent to the corresponding guide boss 411, and the second end of the guide boss 411 of each feeder 410 is received in the corresponding blocking groove 4121. The coupling area is formed between the first ends of the guide bosses 411 of two feeders 410. In this embodiment, electromagnetic waves are transmitted from the coupling region to the guide bosses 411 of the two feeding components 410, that is, the electromagnetic waves are transmitted from the coupling region to both sides of the waveguide channel 101, and the enclosure absorber 412 absorbs the electromagnetic waves, thereby reducing the reflection of the electromagnetic waves and enabling the waveguide component 10 to achieve good matching within a wider frequency band.

[0055] like Figure 2 and Figure 3 As shown, in some embodiments, each feeding element 410 further includes two blocking portions 413, each blocking portion 413 is connected to the first side of the waveguide plate 100, and the two blocking portions 413 of each feeding element 410 are respectively located on both sides of the corresponding guide boss 411, so that the two blocking portions 413 block the electromagnetic waves from leaking to both sides of the guide boss 411, thereby suppressing the problem of electromagnetic wave leakage.

[0056] like Figure 3 As shown, further, each blocking part 413 includes a plurality of blocking columns 4131, each blocking column 4131 is connected to the first side of the waveguide plate 100, and the plurality of blocking columns 4131 of each blocking part 413 are arranged in an array along the extension direction of the corresponding guide boss 411 to form an electromagnetic band gap structure on both sides of the guide boss 411, thereby suppressing the leakage problem of electromagnetic waves.

[0057] like Figure 3 As shown, in some of the embodiments, a step structure 4111 is formed at the first end of the guide boss 411 of each feeding element 410, which plays a role in impedance matching, facilitates the electromagnetic wave to climb to the upper surface of the guide boss 411, and further facilitates the transmission of the electromagnetic wave.

[0058] like Figure 2As shown, in some embodiments, the waveguide assembly 10 further includes a matching boss 500, the matching boss 500 is connected to the first side of the waveguide plate 100, the matching boss 500 is also connected to one end of the bandgap boss 210, and the matching boss 500 is arranged corresponding to the input end of the waveguide channel 101. In this embodiment, the matching boss 500 serves as impedance matching at the input end of the waveguide channel 101, reduces the reflection of electromagnetic waves, reduces the leakage of electromagnetic waves, and is conducive to improving the transmission effect of electromagnetic waves.

[0059] like Figure 2 As shown, further, the cross section of the matching boss 500 is square. Of course, the matching boss 500 is not limited to a square shape. For example, in other embodiments, the cross section of the matching boss 500 can also be circular, triangular or other shapes.

[0060] like Figure 5 As shown, the present disclosure also provides a radar system, comprising the waveguide assembly 10 of any one of the above embodiments.

[0061] In the above-mentioned radar system, since the first electromagnetic band gap structure 200 and the second electromagnetic band gap structure 300 are respectively arranged on both sides of the waveguide channel 101, the first electromagnetic band gap structure 200 and the second electromagnetic band gap structure 300 are both arranged along the extension direction of the waveguide channel 101, so that the first electromagnetic band gap structure 200 and the second electromagnetic band gap structure 300 are respectively blocked on both sides of the opening of the waveguide channel 101, so that the first electromagnetic band gap structure 200 and the second electromagnetic band gap structure 300 jointly play a role of high impedance surface suppression, that is, the first electromagnetic band gap structure 200 and the second electromagnetic band gap structure 300 jointly suppress the electromagnetic wave leakage problem of the waveguide channel 101, thereby making the electromagnetic wave leakage amount of the waveguide channel 101 small, that is, most of the electromagnetic energy is effectively transmitted, so that the waveguide channel 101 does not need to be sealed, and thus the waveguide component 10 does not need to add an additional shielding plate; and since the waveguide component 10 is an integrated structure, it is not necessary to assemble the waveguide component 10, thereby improving the manufacturing efficiency of the radar system and reducing the processing complexity of the radar system.

[0062] like Figure 3 , Figure 5 and Figure 6 As shown, in some embodiments, the radar system further includes a metal cover 20, the metal cover 20 is provided with a radiation slot 201, so that the metal cover 20 serves as an antenna of the radiation slot 201, the waveguide assembly 10 is located in the metal cover 20, and the ridge waveguide 400 is arranged opposite to the radiation slot 201. In this embodiment, the ridge waveguide 400 guides the electromagnetic wave to the radiation slot 201, so that the electromagnetic wave is radiated to the outside through the radiation slot 201.

[0063] like Figure 3 and Figure 5As shown, further, the guide boss 411 of each feed 410 is arranged corresponding to the radiation slot 201, so that the guide boss 411 of each feed 410 guides the electromagnetic wave to the radiation slot 201, and then the electromagnetic wave is radiated to the outside through the radiation slot 201. Since the outside of the metal cover 20 is an air medium, that is, the outside of the radiation slot 201 antenna is an air medium, the radar system will not have reflection and refraction at the same time, ensuring a smooth transition of the radiation pattern, avoiding the problem of pattern ripples, and improving the performance of the radar system. In addition, the radiation slot 201 is fed through the ridge waveguide 400, that is, the ridge waveguide 400 is used as the feeding structure of the slot antenna, which reduces the size of the waveguide feeding.

[0064] like Figure 5 As shown, further, the metal cover 20 is formed with a suppression slot 202, and the suppression slot 202 is arranged adjacent to the radiation slot 201. In this embodiment, the suppression slot 202 is used to suppress the surface wave on the metal cover 20, thereby improving the performance of the radar system.

[0065] like Figure 6 and Figure 7 As shown, in one embodiment, the radar system further includes a circuit board 30 and a chip 40, a microstrip line 600 is provided on the circuit board 30, the chip 40 is electrically connected to the circuit board 30, and the chip 40 is electrically connected to the first end of the microstrip line 600. A shielding groove 102 is provided on the second side of the waveguide plate 100, that is, a shielding groove 102 is provided on the side of the waveguide plate 100 away from the waveguide channel 101, and the second end of the microstrip line 600 is located in the shielding groove 102, and a connecting hole is provided on the inner wall of the shielding groove 102, and the connecting hole is connected to the input end of the waveguide channel 101. In this embodiment, after the chip 40 generates a signal, it is transmitted to the waveguide channel 101 through the microstrip line 600 on the circuit board 30, and finally radiated into space by the slot antenna. At the same time, the received signal is also transmitted back to the chip 40 through the same path for processing. Since the second end of the microstrip line 600 is located in the shielding slot 102 , the shielding slot 102 can suppress signal leakage of the microstrip line 600 , thereby avoiding the problem of signal interference between different microstrip lines 600 .

[0066] Compared with the prior art, the present invention has at least the following advantages:

[0067] Since the first electromagnetic bandgap structure 200 and the second electromagnetic bandgap structure 300 are respectively arranged on both sides of the waveguide channel 101, and the first electromagnetic bandgap structure 200 and the second electromagnetic bandgap structure 300 are both arranged along the extension direction of the waveguide channel 101, so that the first electromagnetic bandgap structure 200 and the second electromagnetic bandgap structure 300 are respectively blocked on both sides of the opening of the waveguide channel 101, so that the first electromagnetic bandgap structure 200 and the second electromagnetic bandgap structure 300 jointly play a role of high impedance surface suppression, that is, the first electromagnetic bandgap structure 200 and the second electromagnetic bandgap structure 300 jointly suppress the electromagnetic wave leakage problem of the waveguide channel 101, thereby making the electromagnetic wave leakage amount of the waveguide channel 101 small, that is, most of the electromagnetic energy is effectively transmitted, so that the waveguide channel 101 does not need to be sealed, and thus the waveguide component 10 does not need to add an additional shielding plate; and since the waveguide component 10 is an integrated molding structure, it is not necessary to assemble the waveguide component 10, thereby improving the manufacturing efficiency of the radar system and reducing the processing complexity of the radar system.

[0068] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A waveguide assembly, comprising a waveguide plate (100), wherein a waveguide channel (101) is formed on a first side of the waveguide plate (100), It is characterized in that The waveguide component is an integrally formed structure, and further comprises a first electromagnetic bandgap structure (200) and a second electromagnetic bandgap structure (300), wherein the first electromagnetic bandgap structure (200) and the second electromagnetic bandgap structure (300) are both connected to a first side of the waveguide plate (100), the first electromagnetic bandgap structure (200) and the second electromagnetic bandgap structure (300) are respectively arranged on both sides of the waveguide channel (101), and the first electromagnetic bandgap structure (200) and the second electromagnetic bandgap structure (300) are both arranged along an extension direction of the waveguide channel (101).

2. The waveguide assembly according to claim 1, It is characterized in that The first electromagnetic bandgap structure (200) comprises a bandgap boss (210), wherein the bandgap boss (210) is connected to a first side of the waveguide plate (100), and the bandgap boss (210) is located on a first side of the waveguide channel (101).

3. The waveguide assembly according to claim 2, It is characterized in that The first electromagnetic bandgap structure (200) further comprises a plurality of first columns (220), each of the first columns (220) being connected to a first side of the waveguide plate (100), each of the first columns (220) being located on a side of the bandgap boss (210) away from the waveguide channel (101), and the plurality of first columns (220) being arranged in an array along an extension direction of the bandgap boss (210).

4. The waveguide assembly according to claim 1, It is characterized in that The second electromagnetic bandgap structure (300) comprises a second column (310), each of the second columns (310) is connected to the first side of the waveguide plate (100), each of the second columns (310) is located on the second side of the waveguide channel (101), and a plurality of the second columns (310) are arranged in an array along the extension direction of the waveguide channel (101).

5. The waveguide assembly according to claim 4, It is characterized in that The second bandgap structure further comprises a plurality of third columns (320) arranged in an array, each of the third columns (320) being connected to a first side of the waveguide plate (100), and each of the third columns (320) being located on a side of the second column (310) facing away from the waveguide channel (101).

6. The waveguide assembly according to claim 1, It is characterized in that The waveguide component further comprises a ridge waveguide (400), wherein the ridge waveguide (400) is connected to a first side of the waveguide plate (100), and the ridge waveguide (400) is formed with a coupling region, wherein the coupling region is connected to an output end of the waveguide channel (101).

7. The waveguide assembly according to claim 6, It is characterized in that The ridge waveguide (400) comprises two feeding elements (410), the two feeding elements (410) are respectively connected to the first side of the waveguide plate (100), the two feeding elements (410) are symmetrically arranged on both sides of the waveguide channel (101), and the coupling region is formed between the two feeding elements (410).

8. The waveguide assembly according to claim 7, It is characterized in that Each of the feeders (410) comprises a guide boss (411) and an enclosure absorption member (412); a first end of the guide boss (411) of each of the feeders (410) is arranged corresponding to the output end of the waveguide channel (101); and the enclosure absorption member (412) of each of the feeders (410) is connected to the second end of the corresponding guide boss (411); and a thickness of the enclosure absorption member (412) of each of the feeders (410) is greater than The thickness of the corresponding guide boss (411) is determined by the thickness of the corresponding guide boss (411), a blocking groove (4121) is formed on one side of the blocking absorption piece (412) of each feeder (410) adjacent to the corresponding guide boss (411), and the second end of the guide boss (411) of each feeder (410) is received in the corresponding blocking groove (4121); and the coupling area is formed between the first ends of the guide bosses (411) of the two feeders (410).

9. The waveguide assembly according to claim 8, It is characterized in that Each of the feeding elements (410) further comprises two blocking portions (413), each of the blocking portions (413) being connected to a first side of the waveguide plate (100), and the two blocking portions (413) of each of the feeding elements (410) being respectively located on both sides of the corresponding guide boss (411).

10. A radar system, It is characterized in that A waveguide assembly comprising the following claim 1.

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