Millimeter wave antenna coupling slot structure with wide impedance bandwidth

Abstract

The utility model discloses a millimeter wave antenna coupling slot structure with wide impedance bandwidth, which comprises a coupling slot arranged on the surface of a radiation patch, telescopic pieces used for changing the effective area of the coupling slot are arranged on the inner walls of the two sides of the coupling slot, and an antenna base is connected below the radiation patch through an adjustable assembly. Through the arrangement of the adjustable assembly and the telescopic pieces, the adjustable assembly can flexibly adjust the height of the radiation patch, so that the performance parameters of the antenna can be optimized, different working environments and application requirements can be met, meanwhile, the effective area of the coupling gap can be changed through the coupling gap and the telescopic pieces on the inner walls of the two sides, and the antenna is more compact. Therefore, the impedance matching and radiation characteristics of the antenna are adjusted, and the working efficiency and bandwidth of the antenna are improved.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, specifically to a millimeter-wave antenna coupling slot structure with a wide impedance bandwidth. Background Technology

[0002] With the development of the communication radar industry, the microwave frequency band is becoming increasingly crowded, and higher frequency spectrum resources are being further developed, leading to widespread attention being paid to the application of millimeter-wave antennas.

[0003] Currently, Chinese patent CN216529367U discloses a broadband millimeter-wave waveguide slot antenna, including a radiating element and a feeding element that are attached to each other. A coupling slot is provided on the side where the radiating element and the feeding element are attached, and the cavities of the radiating element and the feeding element are connected through the coupling slot. Several horizontally or inclined radiating slots are provided on the opposite side of the side where the radiating element and the feeding element are attached, so that the cavity inside the radiating element is connected to free space. The antenna functions by radiating or receiving energy outward through the radiating slots. The feeding element receives electromagnetic energy fed in from an external waveguide and feeds the energy into the radiating element through the radiating slots, and then radiates it into free space. This invention, through adjustments to the multi-layer feeding structure and position, increases the -10dB bandwidth of the multi-layer structure fed waveguide slot antenna conforming to the Chebyshev excitation distribution to approximately 6GHz, allowing it to fully utilize its advantages of simple design and ease of implementation.

[0004] The aforementioned broadband millimeter-wave waveguide slot antenna has some problems in use. The frequency characteristics and radiation performance exhibited by its radiating element are relatively simple, lacking sufficient diversity and flexibility. This makes it difficult for manufacturers to effectively adjust and adapt the radiating element according to different working environments and diverse application requirements during product development. Utility Model Content

[0005] The purpose of this invention is to provide a millimeter-wave antenna coupling slot structure with a wide impedance bandwidth, in order to solve the problem mentioned in the background art that the frequency characteristics and radiation performance of its radiating element are relatively simple, lacking sufficient diversity and flexibility, which makes manufacturers face many limitations in the process of product development and unable to effectively adjust and adapt the radiating element according to different working environments and diverse application requirements.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A millimeter-wave antenna coupling slot structure with a wide impedance bandwidth includes a coupling slot formed on the surface of a radiating patch. The inner walls on both sides of the coupling slot are provided with telescopic components for changing the effective area of ​​the coupling slot. An antenna base is connected to the bottom of the radiating patch through an adjustable component.

[0008] Preferably, the telescopic component includes arc-shaped plates that are respectively close to the inner walls of both sides of the coupling gap, and a guide component for guiding the arc-shaped plates is provided on the opposite side of the two sets of arc-shaped plates.

[0009] Preferably, the guide includes guide plates respectively installed above and below one side of the two sets of arc plates facing each other. The radial patch has guide grooves in the interior and at positions corresponding to the guide plates. The four sets of guide plates are respectively inserted into the inner cavity of the guide grooves at corresponding positions. Movable components for moving the guide plates are provided on both sides of the radial patch.

[0010] Preferably, the moving component includes a circular groove formed at one end of two sets of guide plates located above, facing each other, and lead screws rotatably connected to both sides of the radiating patch at positions corresponding to the circular grooves. One end of each set of lead screws extends into the inner cavity of the corresponding side circular groove, and a nut seat is threaded onto the surface of each set of lead screws. The two sets of nut seats are respectively fixedly inserted into the inner cavity of the corresponding side circular groove.

[0011] Preferably, each of the two sets of lead screws is fixedly connected to a handwheel at one end located outside the radiating patch, and the surface of the handwheel is provided with anti-slip texture.

[0012] Preferably, the adjustable component includes fixing blocks fixedly installed on both sides of the radiating patch. Guide rods are slidably inserted into the surfaces of both sets of fixing blocks. One end of each set of guide rods passes through the corresponding side fixing block and is fixedly connected to the surface of the antenna base. Limiting components are provided on the surfaces of both sets of fixing blocks to limit the fixing blocks and thus fix the radiating patch at a certain height.

[0013] Preferably, a limiting plate is fixedly connected to the top of each guide rod.

[0014] Preferably, the limiting member includes a bolt threaded to the surface of the fixing block, one end of the bolt threaded through the fixing block and abutting against the surface of the guide rod.

[0015] Preferably, both the guide plate and the arc plate are insulated structures.

[0016] Preferably, the top of both sides of the radiation patch is provided with scale lines, and the two sets of guide plates located above are respectively provided with pointers for pointing to the scale lines.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model, through the setting of adjustable components and telescopic parts, allows the adjustable components to flexibly adjust the height of the radiating patch, thereby optimizing the antenna's performance parameters and adapting to different working environments and application requirements. At the same time, the telescopic parts of the coupling gap and the inner walls on both sides can change the effective area of ​​the coupling gap, thereby adjusting the antenna's impedance matching and radiation characteristics, and improving the antenna's working efficiency and bandwidth.

[0019] 2. This utility model, through the design of the guide component, provides a stable guiding effect for the movement of the arc-shaped plate through the cooperation of the guide plate and the guide groove. This ensures that the arc-shaped plate can move accurately in the predetermined direction when adjusting the coupling gap area, avoiding deviation or instability, and improving the reliability and accuracy of antenna performance adjustment.

[0020] 3. By setting up a movable component, this utility model can precisely control the movement of the guide plate, thereby accurately adjusting the effective area of ​​the coupling gap, improving the accuracy and operability of antenna performance adjustment, and facilitating engineers to debug and optimize.

[0021] 4. This utility model provides an intuitive reference for adjusting the effective area of ​​the coupling gap and the height of the radiation patch by setting pointers and scale lines on the top of both sides of the radiation patch and pointers on the guide plate. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the coupling slot structure of the millimeter-wave antenna with a wide impedance bandwidth according to this utility model.

[0023] Figure 2 This is a schematic diagram of the structure of the radiation patch of this utility model;

[0024] Figure 3 This is a cross-sectional view of the radiation patch of this utility model.

[0025] In the diagram: 100, antenna base; 101, guide groove; 102, radiating patch; 103, coupling gap; 104, arc plate; 105, guide plate; 106, circular groove; 107, limiting plate; 200, guide rod; 201, fixing block; 203, bolt; 300, pointer; 301, scale line; 400, handwheel; 401, nut seat; 402, lead screw. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-3 This embodiment provides a millimeter-wave antenna coupling slot structure with a wide impedance bandwidth, including a coupling slot 103 opened on the surface of the radiating patch 102. The inner walls on both sides of the coupling slot 103 are provided with telescopic components for changing the effective area of ​​the coupling slot 103. An antenna base 100 is connected to the bottom of the radiating patch 102 through an adjustable component.

[0028] The telescopic component includes arc-shaped plates 104 that are respectively close to the inner walls of both sides of the coupling gap 103. Each of the two sets of arc-shaped plates 104 has a guide component on its facing side for guiding the arc-shaped plates 104. The guide component includes guide plates 105 installed above and below the facing sides of the two sets of arc-shaped plates 104 respectively. Guide grooves 101 are formed inside the radial patch 102 at positions corresponding to the guide plates 105. The four sets of guide plates 105 are respectively inserted into the inner cavities of the guide grooves 101 at their corresponding positions. Movable components for moving the guide plates 105 are provided on both sides of the radial patch 102. Through the adjustable components and the telescopic component, the adjustable components can... The height of the radiating patch 102 can be flexibly adjusted to optimize the antenna's performance parameters and adapt to different working environments and application requirements. At the same time, the coupling slot 103 and the telescopic components on both sides of the inner wall can change the effective area of ​​the coupling slot 103, thereby adjusting the antenna's impedance matching and radiation characteristics, improving the antenna's working efficiency and bandwidth. Meanwhile, the cooperation between the guide plate 105 and the guide groove 101 provides a stable guiding effect for the movement of the arc plate 104, ensuring that the arc plate 104 can move accurately in the predetermined direction when adjusting the area of ​​the coupling slot 103, avoiding deviation or instability, and improving the reliability and accuracy of antenna performance adjustment.

[0029] The antenna base 100 integrates a feeding unit. The main function of the feeding unit is to transmit radio frequency signals to the radiating patch 102. At the same time, in order for the antenna to effectively radiate and receive electromagnetic waves, the feeding unit needs to be impedance matched with the radiating patch 102.

[0030] For details on the specific connection method and working principle of the radiating patch 102 and the feeding unit, please refer to the announcement number CN216529367U, "A Broadband Millimeter Wave Waveguide Slot Antenna". Other details will not be elaborated here.

[0031] Furthermore, the movable component includes circular slots 106 formed at opposite ends of the two sets of guide plates 105 located above. Lead screws 402 are rotatably connected to both sides of the radiating patch 102 at positions corresponding to the circular slots 106. One end of each lead screw 402 extends into the inner cavity of the corresponding circular slot 106. Nut seats 401 are threaded onto the surfaces of both lead screws 402, and the two nut seats 401 are fixedly inserted into the inner cavity of the corresponding circular slot 106. Through the movable component, the movement of the guide plates 105 can be precisely controlled, thereby accurately adjusting the effective area of ​​the coupling gap 103, improving the accuracy and operability of antenna performance adjustment, and facilitating debugging and optimization by engineers.

[0032] Meanwhile, each of the two sets of lead screws 402 is fixedly connected to a handwheel 400 at one end located outside the radiating patch 102. The surface of the handwheel 400 is provided with anti-slip texture. This design facilitates rotation of the lead screw 402 by the operator, improving the ease of adjustment. The anti-slip texture also increases the friction between the hand and the handwheel 400, preventing slippage during operation and making the adjustment more stable and reliable.

[0033] Preferably, the adjustable component includes fixing blocks 201 fixedly installed on both sides of the radiating patch 102. Guide rods 200 are slidably inserted into the surfaces of both sets of fixing blocks 201. One end of each set of guide rods 200 passes through the corresponding side fixing block 201 and is fixedly connected to the surface of the antenna base 100. The surfaces of both sets of fixing blocks 201 are provided with limiting members to limit the fixing blocks 201 and thus fix the radiating patch 102 at a certain height. Through the setting of the adjustable component, the combination of fixing blocks 201, guide rods 200 and limiting members provides a stable and reliable structure for the height adjustment of the radiating patch 102. The guide rods 200 ensure the vertical movement of the radiating patch 102 during the height adjustment process and avoid deviation.

[0034] Each guide rod 200 has a fixed limiting plate 107 at its top. The limiting plate 107 prevents the fixing block 201 from accidentally falling off the guide rod, ensuring the safety and stability of the radiation patch 102 during height adjustment.

[0035] It is worth noting that the limiting component includes a bolt 203 threaded to the surface of the fixing block 201. One end of the bolt 203 is threaded through the fixing block 201 and abuts against the surface of the guide rod 200. By setting the limiting component, the height of the radiation patch 102 can be firmly fixed, preventing the height of the radiation patch 102 from changing due to vibration or other external forces.

[0036] Furthermore, both the guide plate 105 and the arc plate 104 are insulated structures. The insulated structure is made of one or a combination of polytetrafluoroethylene and ceramic materials, which avoids signal interference and short circuit problems caused by conductivity during antenna operation, and ensures normal operation and stable performance of the antenna.

[0037] Preferably, scale lines 301 are provided on the top of both sides of the radiating patch 102, and two sets of guide plates 105 located above are respectively provided with pointers 300 for pointing to the scale lines 301. Through the setting of pointers 300 and scale lines 301, the scale lines 301 on the top of both sides of the radiating patch 102 and the pointers 300 on the guide plates 105 provide a direct reference for adjusting the effective area of ​​the coupling gap 103 and the height of the radiating patch 102.

[0038] Working principle;

[0039] First, pinch the radiating patch 102 and simultaneously loosen the bolts 203 on both sides. Then, pinch the radiating patch 102 and slide it up and down as needed to adjust the resonant frequency, radiation direction, gain, etc. of the radiating patch 102. When the desired height is reached, tighten the bolts 203 on both sides to fix the radiating patch 102. Then, rotate the handwheels 400 on both sides of the radiating patch 102 in sequence to drive the lead screw 402 to rotate, thereby moving the guide plates 105 on both sides inward. This changes the effective area of ​​the coupling gap 103 and optimizes the length of the coupling gap 103, thereby ensuring that the coupling gap 103 maintains good impedance matching in the frequency range. Furthermore, the length of the coupling gap 103 can be adjusted according to different operating frequencies, thereby improving frequency adaptability.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A millimeter wave antenna coupled slot structure having a wide impedance bandwidth, characterized by, The utility model provides a kind of antenna, including the coupling slit (103) opened in the surface of radiation patch (102), the inner wall of both sides of the coupling slit (103) is provided with telescopic member for changing the effective area of coupling slit (103), the lower side of the radiation patch (102) is connected with antenna pedestal (100) by adjustable assembly.

2. The millimeter wave antenna coupled slot structure with wide impedance bandwidth of claim 1, wherein; The telescopic member includes arc plate (104) close to the inner wall of both sides of coupling slit (103) respectively, and the side of the two groups of arc plate (104) is provided with guide for guiding arc plate (104).

3. The millimeter wave antenna coupled slot structure with wide impedance bandwidth of claim 2, wherein; The guide includes guide plate (105) installed on the side of the two groups of arc plate (104) respectively, and the inside of the radiation patch (102) and the corresponding position of guide plate (105) are provided with guide slot (101), and the four groups of guide plate (105) are inserted into the inner cavity of the corresponding position of guide slot (101) respectively, and the two sides of the radiation patch (102) are provided with moving assembly for moving guide plate (105).

4. The millimeter wave antenna coupled slot structure having a wide impedance bandwidth of claim 3, wherein; The moving assembly includes circular slot (106) opened in the end of the two groups of guide plate (105) on the top, and the two sides of the radiation patch (102) and the corresponding position of circular slot (106) are rotatably connected with lead screw (402), and one end of the two groups of lead screw (402) extends into the inner cavity of the corresponding side of circular slot (106) respectively, and the surface of the two groups of lead screw (402) is threadedly connected with nut seat (401), and the two groups of nut seat (401) are fixedly inserted into the inner cavity of the corresponding side of circular slot (106) respectively.

5. The millimeter wave antenna coupled slot structure with wide impedance bandwidth of claim 4, wherein: One end of the two groups of lead screw (402) outside the radiation patch (102) is fixedly connected with hand wheel (400), and the surface of hand wheel (400) is provided with anti-skid pattern.

6. The millimeter wave antenna coupled slot structure with wide impedance bandwidth of claim 1, wherein: The adjustable assembly includes fixed block (201) fixedly installed on the two sides of the radiation patch (102), and the surface of the two groups of fixed block (201) is slidably inserted with guide rod (200), and one end of the two groups of guide rod (200) penetrates through the corresponding side of fixed block (201) and is fixedly connected with the surface of antenna pedestal (100), and the surface of the two groups of fixed block (201) is provided with limiting member for limiting fixed block (201) to fix the radiation patch (102) at a certain height.

7. The millimeter wave antenna coupled slot structure with wide impedance bandwidth of claim 6, wherein: The top of guide rod (200) is fixedly connected with limiting disc (107).

8. The millimeter wave antenna coupled slot structure with wide impedance bandwidth of claim 6, wherein: The limiting member includes bolt (203) threadedly connected with the surface of fixed block (201), and one end of bolt (203) is threadedly penetrated through fixed block (201) and abuts against the surface of guide rod (200).

9. The millimeter wave antenna coupled slot structure with wide impedance bandwidth of claim 3, wherein: The guide plate (105) and arc plate (104) are both insulating structures.

10. The millimeter wave antenna coupled slot structure having a wide impedance bandwidth of any of claims 3-4, wherein: The two sides of the top of the radiation patch (102) are provided with scale line (301), and the two groups of guide plate (105) on the top are provided with pointer (300) for pointing scale line (301) respectively.

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