L-band miniaturized patch array antenna

Abstract

The utility model relates to the technical field of microwave remote sensing, in particular to an L-band miniaturized patch array antenna, which comprises a bearing frame, and an assembling mechanism is arranged in the bearing frame. A micro-strip medium is installed on the assembling mechanism, a micro-strip ground is arranged at the lower end of the micro-strip medium, an SMA connector is connected to the lower end of the micro-strip medium, radiation patch assemblies are installed at the four corners of the upper end of the micro-strip medium, and feed networks are installed in the radiation patch assemblies. According to the invention, the connection between the radiation patch assembly and the microstrip ground can be realized through the feed network and the SMA connector, so that the antenna has the effects of narrow band, high isolation, high gain and low return loss; and meanwhile, a plurality of microstrip dielectrics can be quickly assembled through the assembling mechanism, and the microstrip dielectrics can be quickly mounted on the stepped structure, so that an array is better formed, and the performance of the antenna is improved.

Description

Technical Field

[0001] This utility model relates to the field of microwave remote sensing technology, and in particular to an L-band miniaturized patch array antenna. Background Technology

[0002] In recent years, with the widespread application and rapid development of microwave remote sensing technology, higher requirements have been put forward for antenna design in microwave remote sensing.

[0003] Traditional dual-polarized horn antennas, circularly polarized horn antennas, waveguide slot antennas, dipole antennas, microstrip antennas, and "a unique dual-patch array antenna with publication number CN220420889U" have disadvantages such as high processing difficulty, heavy weight, or large size, making them unsuitable for microwave remote sensing applications carried by UAVs. Therefore, the use of microstrip array antennas and their diverse feeding methods are attracting increasing attention.

[0004] However, most microstrip antenna elements and feed network reference grounds are located between the printed circuit board dielectric, resulting in a high dielectric constant and thus significant antenna loss. Ordinary dual-polarized microstrip antennas generally have low isolation without additional measures, and due to dual-polarized feeding, it is difficult to achieve a dual-polarized feed network arrangement for large antenna arrays using a single-layer feed line between the printed circuit boards. In addition, there are dual-polarized antenna arrays with a combination of waveguides and suspended strip lines for series-parallel feeding, but these are large, have a high profile, and are heavy; therefore, improvements are needed. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a miniaturized L-band patch array antenna.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A miniaturized L-band patch array antenna includes a carrier frame, and an assembly mechanism is provided inside the carrier frame.

[0008] The assembly mechanism is equipped with a microstrip medium, the lower end of which is provided with a microstrip ground, and the lower end of which is connected to an SMA connector. Radiation patch assemblies are installed at the four corners of the upper end of the microstrip medium, and a power supply network is installed inside the radiation patch assemblies.

[0009] The power supply network is connected to the SMA connector.

[0010] Compared with existing technologies, this application can connect the radiating patch assembly and the microstrip ground through the feed network and SMA connector, giving it the effects of narrowband, high isolation, high gain and low return loss; at the same time, it can also achieve rapid assembly of multiple microstrip dielectrics through the assembly mechanism, and can ensure that the microstrip dielectrics can be quickly installed on the stepped structure to better form an array and improve antenna performance.

[0011] Preferably, the microstrip dielectric is made of FR-4 substrate with a thickness of 1.6 mm and a dielectric constant of 4.4; the radiating patch assembly consists of four square patches arranged in a 2×2 matrix, with a patch side length of 48.2 mm and a patch spacing of 26.8 mm.

[0012] The power supply network uses 50-ohm microstrip lines with a width of 3.1 mm;

[0013] The microstrip ground and radiating patch assembly form a microstrip antenna structure.

[0014] Furthermore, it facilitates the connection of supporting components, enabling effective connection of corresponding components and improving antenna performance.

[0015] Preferably, the assembly mechanism includes a mounting groove formed at the upper end of the support frame, and a plurality of uprights are fixed at equal intervals at the bottom of the mounting groove;

[0016] The column is equipped with an adjustment mechanism. Four fixing plates are fixed at equal intervals on the side wall of the column. A stepped structure is fixed at the upper end of the fixing plate. The stepped structure and the fixing plate to which it is fixed have a cavity. A pressing mechanism is provided in the cavity. A sliding rod is provided on the pressing mechanism. The sliding rod is connected to the adjustment mechanism.

[0017] Furthermore, the control mechanism enables the sliding rod to drive the extrusion mechanism, facilitating the positioning of the assembled micro-strip medium.

[0018] Preferably, the control mechanism includes a lead screw rotatably sleeved inside the bottom of the column member, a lead screw nut threaded onto the lead screw, a reset mechanism at the lower end of the lead screw nut, and a second pressure plate member fixed on one side of the lead screw nut, the second pressure plate member being slidably mounted on the column member;

[0019] The upper end of the lead screw is fixed with a turntable component, and the upper end of the turntable component is rotatably connected to four inclined rods at equal intervals. The four inclined rods are rotatably connected to four sliding rods respectively.

[0020] Furthermore, the position of the lead screw nut can be controlled by the pressure plate, and the position of the lead screw nut can be adjusted to make the lead screw rotate. The lead screw can drive the turntable to rotate, and the turntable can cause the inclined rod to drive the sliding rod to move, so that the sliding rod can drive the connecting frame to move.

[0021] Preferably, the reset mechanism includes a ring component installed at the lower end of the lead screw nut, the ring component being sleeved on the lead screw, and a resistance spring component fixed at the lower end of the ring component, with the two ends of the resistance spring component respectively fixed at the lower end of the ring component and the bottom of the column component.

[0022] Furthermore, the resistance spring component enables the lead screw nut to quickly reset after adjustment and movement.

[0023] Preferably, the extrusion mechanism includes a connecting frame slidably installed in the cavity, a first pressure plate fixed on the connecting frame, the first pressure plate penetrating the stepped structure and extending to the outer end of the stepped structure, one end of the connecting frame penetrating the stepped structure and extending to the outer side of the stepped structure, and the lower end of the connecting frame fixed to the upper end of the sliding rod.

[0024] Furthermore, the stepped structure is a trapezoidal mechanism, and the pressure plate on the connecting frame corresponds to multiple vertical ends within the stepped structure. It can penetrate and move out of the stepped structure. At the same time, the end of the pressure plate that moves out of the stepped structure is inclined to facilitate the removal and compression of the corresponding microstrip medium.

[0025] The beneficial effects of this utility model are:

[0026] 1. The power supply network adopts a T-shaped branch structure to distribute the signal with equal amplitude and phase to the four radiating patches in the radiating patch assembly;

[0027] 2. By connecting the radiating patch assembly, the feed network, the microstrip ground, and the SMA connector, it can output through the SMA connector. Compared with the existing technology, it has a simpler structure, dual polarization, high gain, narrow bandwidth, and light weight; it is easy to integrate and is worth promoting for use in the field of microwave remote sensing.

[0028] 3. The pressure plate component allows the lead screw nut to rise and fall, causing the lead screw to rotate. This allows the turntable component to move via the inclined rod component, sliding rod component, connecting frame, and pressure plate component. This enables the pressure plate component to quickly clamp the corresponding microstrip medium, allowing the microstrip medium to form an array, and the assembly efficiency is high. Attached Figure Description

[0029] Figure 1 This is a connection structure diagram of the present invention;

[0030] Figure 2 This is a structural diagram of the assembly mechanism in this utility model;

[0031] Figure 3 This is a structural diagram of the column component, pressure plate component, and fixing plate in this utility model;

[0032] Figure 4This is a connection structure diagram of the turntable component, lead screw nut, and pressure plate component in this utility model;

[0033] Figure 5 The antenna simulation direction and gain diagram in this utility model are shown.

[0034] Figure 6 This is a simulation return loss diagram of the antenna in this utility model;

[0035] In the diagram: 1 Radiation patch assembly, 2 Power supply network, 3 SMA connector, 4 Microstrip ground, 5 Microstrip medium, 6 Bearing frame, 7 Mounting slot, 8 Step structure, 9 First pressure plate, 10 Connecting frame, 11 Fixing plate, 12 Second pressure plate, 13 Column, 14 Sliding rod, 15 Diagonal rod, 16 Turntable, 17 Lead screw nut, 18 Ring, 19 Resistance spring, 20 Lead screw. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0037] Reference Figure 1-6 A miniaturized L-band patch array antenna includes a carrier frame 6, within which an assembly mechanism is installed. A microstrip dielectric 5 is mounted on the assembly mechanism, enabling the array mounting of multiple microstrip dielectrics 5 to effectively improve antenna performance. The microstrip dielectric 5 is made of FR-4 substrate with a thickness of 1.6 mm and a dielectric constant of 4.4. A microstrip ground 4 is located at the lower end of the microstrip dielectric 5, and an SMA connector 3 is connected to the lower end of the microstrip dielectric 5. Radiating patch assemblies 1 are mounted at the four corners of the upper end of the microstrip dielectric 5, forming a microstrip antenna structure with the microstrip ground 4 and the radiating patch assemblies 1. A feed network 2 is installed within the radiating patch assembly 1. The radiating patch assembly 1 consists of four square patches arranged in a 2×2 matrix, with a patch side length of 48.2 mm and a patch spacing of 26.8 mm. The feed network 2 uses 50-ohm microstrip lines with a width of 3.1 mm. The feed network 2 is connected to the SMA connector 3 to achieve signal transmission. This scheme enables the simulated antenna direction and gain image formed by the array antenna to be optimized. Figure 5 The circular shape shown helps ensure the circularly polarized array antenna covers the target detection area; from Figure 6 As can be seen from the curve, the simulated return loss of the array antenna in this application is between 1.41 GHz and 1.42 GHz.

[0038] Reference Figure 2-4The assembly mechanism includes a mounting groove 7 opened at the upper end of the support frame 6, and multiple uprights 13 are fixed at equal intervals at the bottom of the mounting groove 7. By installing multiple uprights 13 in the mounting groove 7, multiple microstrip dielectrics 5 can be effectively installed in the mounting groove 7, thereby forming an antenna array of microstrip dielectrics 5 and improving the antenna function.

[0039] Reference Figure 2-4 The column 13 is equipped with an adjustment mechanism. Four fixing plates 11 are fixed at equal intervals on the side wall of the column 13. A stepped structure 8 is fixed to the upper end of the fixing plate 11. A cavity is opened in the stepped structure 8 and the fixing plate 11 to which it is fixed. A pressing mechanism is provided in the cavity. A sliding rod 14 is provided on the pressing mechanism. The sliding rod 14 is connected to the adjustment mechanism. The operation of the adjustment mechanism and the pressing mechanism can make the first pressure plate 9 move. When the first pressure plate 9 tightens in the stepped structure 8, the microstrip medium 5 can be placed on the horizontal surface corresponding to the stepped structure 8. By resetting the first pressure plate 9, the microstrip medium 5 can be pressed, and the installation of the microstrip medium 5 is completed.

[0040] Reference Figure 2-4 The control mechanism includes a lead screw 20 that is rotatably sleeved inside the bottom of the column 13. A lead screw nut 17 is threaded onto the lead screw 20. A reset mechanism is provided at the lower end of the lead screw nut 17. A second pressure plate 12 is fixed on one side of the lead screw nut 17. The second pressure plate 12 is slidably mounted on the column 13.

[0041] The upper end of the lead screw 20 is fixed with a turntable 16. The upper end of the turntable 16 is rotatably connected with four inclined rods 15 at equal intervals. The four inclined rods 15 are rotatably connected to four sliding rods 14 respectively. The second pressure plate 12 can stably rise and fall relative to the column 13, and can drive the lead screw nut 17 to rise and fall. The function of the lead screw nut 17 is to make the lead screw 20 rotate and to control the rotation direction of the lead screw 20.

[0042] Reference Figure 2-4 The reset mechanism includes a ring 18 installed at the lower end of the lead screw nut 17. The ring 18 is sleeved on the lead screw 20. A resistance spring 19 is fixed at the lower end of the ring 18. The two ends of the resistance spring 19 are respectively fixed at the lower end of the ring 18 and the bottom of the column 13. The resistance spring 19 can cause the ring 18 to drive the lead screw nut 17 to reset, so that the lead screw 20 can be rotated by the lifting and lowering of the lead screw nut 17. After the adjustment is completed, it will automatically reset and complete the installation of the microstrip medium 5.

[0043] Reference Figure 2-4The extrusion mechanism includes a connecting frame 10 slidably installed in the cavity. A first pressure plate 9 is fixed on the connecting frame 10. The first pressure plate 9 penetrates the stepped structure 8 and extends to the outer end of the stepped structure 8. One end of the connecting frame 10 penetrates the stepped structure 8 and extends to the outer side of the stepped structure 8. The lower end of the connecting frame 10 is fixed to the upper end of the sliding rod 14. In actual production, the stepped structure 8 is stair-shaped. At the same time, the connecting frame 10 can drive the first pressure plate 9 to move. The first pressure plate 9 corresponds to the vertical end of the stepped structure 8, so that the first pressure plate 9 penetrates the vertical end of the stepped structure 8 and extends to the outer end of the stepped structure 8. The lower side of the end of the first pressure plate 9 extending out of the stepped structure 8 is inclined. During installation, the first pressure plate 9 is tightened inside the stepped structure 8, so that the micro-strip medium 5 is pressed against the upper end of the four stepped structures 8, so that the first pressure plate 9 is pressed against the upper end of the micro-strip medium 5.

[0044] In this utility model, the second pressure plate 12 can stably rise and fall relative to the column 13, and can drive the screw nut 17 to rise and fall. The screw nut 17 can cause the screw 20 to rotate and can also control the rotation direction of the screw 20. The rotation of the screw 20 can cause the inclined rod 15, the sliding rod 14, and the connecting frame 10 to drive the first pressure plate 9 to move. At the same time, the connecting frame 10 can drive the first pressure plate 9 to move. The first pressure plate 9 corresponds to the vertical end of the stepped structure 8, so that the first pressure plate 9 passes through the vertical end of the stepped structure 8 and extends to the outer end of the stepped structure 8. The lower side of the end of the first pressure plate 9 extending out of the stepped structure 8 is inclined. During installation, the first pressure plate 9 is tightened inside the stepped structure 8, which makes it easy to put the microstrip medium 5 against the upper end of the four stepped structures 8, and makes it easy for the first pressure plate 9 to abut against the upper end of the microstrip medium 5.

[0045] The power supply network 2 adopts a T-shaped branch structure to distribute the signal in equal amplitude and phase to the four radiating patches in the radiating patch assembly 1. Through the connection of the radiating patch assembly 1, the power supply network 2, the microstrip ground 4 and the SMA connector 3, the signal can be output through the SMA connector 3. Compared with the existing technology, it has a simple structure, dual polarization, high gain, narrow bandwidth and light weight. It is easy to integrate and is worth promoting for use in the field of microwave remote sensing.

[0046] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A miniaturized L-band patch array antenna, comprising a carrier frame (6), characterized in that: An assembly mechanism is provided inside the support frame (6); The assembly mechanism is equipped with a microstrip medium (5), the lower end of the microstrip medium (5) is provided with a microstrip ground (4), the lower end of the microstrip medium (5) is connected to an SMA connector (3), and the upper end of the microstrip medium (5) is equipped with a radiating patch assembly (1) at each of the four corners, and a power supply network (2) is installed inside the radiating patch assembly (1). The power supply network (2) is connected to the SMA connector (3).

2. The L-band miniaturized patch array antenna according to claim 1, characterized in that: The microstrip dielectric (5) is made of FR-4 substrate with a thickness of 1.6 mm and a dielectric constant of 4.4; the radiating patch assembly (1) consists of four square patches arranged in a 2×2 matrix with a side length of 48.2 mm and a patch spacing of 26.8 mm. The power supply network (2) uses 50-ohm microstrip lines with a width of 3.1 mm; The microstrip ground (4) and the radiating patch assembly (1) form a microstrip antenna structure.

3. The L-band miniaturized patch array antenna according to claim 1, characterized in that: The assembly mechanism includes a mounting groove (7) opened at the upper end of the support frame (6), and multiple uprights (13) are fixed at equal intervals at the bottom of the mounting groove (7). The column (13) is provided with an adjustment mechanism. Four fixing plates (11) are fixed at equal intervals on the side wall of the column (13). A stepped structure (8) is fixed at the upper end of the fixing plate (11). A cavity is opened in the stepped structure (8) and the fixing plate (11) fixed thereto. A squeezing mechanism is provided in the cavity. A sliding rod (14) is provided on the squeezing mechanism. The sliding rod (14) is connected to the adjustment mechanism.

4. The L-band miniaturized patch array antenna according to claim 3, characterized in that: The control mechanism includes a lead screw (20) rotatably sleeved inside the bottom of the column (13), a lead screw nut (17) threaded onto the lead screw (20), a reset mechanism at the lower end of the lead screw nut (17), and a second pressure plate (12) fixed on one side of the lead screw nut (17), which is slidably mounted on the column (13). The upper end of the lead screw (20) is fixed with a turntable (16), and the upper end of the turntable (16) is rotatably connected with four inclined rods (15) at equal intervals. The four inclined rods (15) are rotatably connected to four sliding rods (14) respectively.

5. The L-band miniaturized patch array antenna according to claim 4, characterized in that: The reset mechanism includes a ring (18) installed at the lower end of the lead screw nut (17), the ring (18) being sleeved on the lead screw (20), and a resistance spring (19) fixed at the lower end of the ring (18), with the two ends of the resistance spring (19) being fixed at the lower end of the ring (18) and the bottom of the column (13) respectively.

6. The L-band miniaturized patch array antenna according to claim 3, characterized in that: The extrusion mechanism includes a connecting frame (10) slidably installed in the cavity. A first pressure plate (9) is fixed on the connecting frame (10). The first pressure plate (9) passes through the stepped structure (8) and extends to the outer end of the stepped structure (8). One end of the connecting frame (10) passes through the stepped structure (8) and extends to the outer side of the stepped structure (8). The lower end of the connecting frame (10) is fixed to the upper end of the sliding rod (14).

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