A broadband vehicular data link antenna

Abstract

The utility model discloses a kind of broadband vehicle-mounted data link antennas, it is related to data link antenna technical field, including antenna mounting frame, the inside fixed mounting of antenna mounting frame has mounting plate, the top of mounting plate is equipped with two article grooves, two article grooves are respectively provided with receiving antenna and transmitting antenna, receiving antenna and transmitting antenna all include mounting seat, high-frequency radiation patch, low-frequency radiation patch, feed cavity and feed connector, electromagnetic wave is fed into feed cavity from the feed connector in mounting seat, under the joint action of feed cavity and high-frequency radiation patch and low-frequency radiation patch, form high-low frequency resonance, through the double-layer parallel laminated structure of high-frequency radiation patch and low-frequency radiation patch, cooperate feed cavity to form composite resonance system, break through the operating bandwidth limit of only a few percent of traditional microstrip antenna, realize multi-band collaborative work, satisfy the broadband communication demand of vehicle-mounted data link.

Description

Technical Field

[0001] This utility model relates to the field of data link antenna technology, specifically to a broadband vehicle-mounted data link antenna. Background Technology

[0002] Vehicle-mounted data link antennas generally require small size, wide beam, low profile, and high in-beam gain. Most commonly used vehicle-mounted data link antennas are microstrip antennas, which are generally composed of radiating patches, dielectric substrates, and feed connectors. Although conventional microstrip antennas have the characteristics of low profile and wide beam, their operating frequency band is narrow, generally only a few percent of the operating bandwidth. Using microstrip bandwidth broadening technology usually greatly increases antenna loss, thereby reducing antenna gain. Moreover, the transmitting and receiving antennas are prone to mutual interference, which causes antenna beam distortion and the beam pointing deviates from the expected direction, failing to meet the application requirements of broadband vehicle-mounted data link antennas.

[0003] Chinese patent CN118763383A discloses a broadband vehicle-mounted data link antenna and its mounting structure, relating to the field of vehicle-mounted data link antenna technology. The antenna mounting frame includes an antenna radome fixedly mounted on its upper surface. A transmitting antenna assembly is fixedly mounted within the inner cavity of the antenna mounting frame. A receiving antenna assembly is fixedly connected to the right side of the transmitting antenna assembly. The outer wall of the receiving antenna assembly is fixedly mounted to the inner cavity of the antenna mounting frame. Mounting and fixing components are fixedly connected to the inner cavities at each of the four corners of the antenna mounting frame.

[0004] The installation structure in this Chinese patent and existing technology is relatively complex and cannot be directly shown. In actual installation and dismantling, staff may encounter unclear operating procedures, which affects the efficiency of installation and dismantling, increases the difficulty of installation and maintenance costs. At the same time, the material used is the dielectric substrate of traditional microstrip antennas, which has a certain dielectric loss, resulting in limited gain and thus affecting the strength and stability of signal transmission. Utility Model Content

[0005] In view of the shortcomings of the existing technology, this utility model provides a broadband vehicle-mounted data link antenna to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] A broadband vehicle-mounted data link antenna includes an antenna mounting frame. A mounting plate is fixedly installed inside the mounting frame. Two storage slots are formed on the top of the mounting plate, each housing a receiving antenna and a transmitting antenna. Both the receiving and transmitting antennas include a mounting base, a high-frequency radiating patch, a low-frequency radiating patch, a feed cavity, and a feed connector. Electromagnetic waves are fed into the feed cavity from the feed connector in the mounting base. Under the combined action of the feed cavity, the high-frequency radiating patch, and the low-frequency radiating patch, high- and low-frequency resonances are formed, ultimately radiated into the air by the high-frequency and low-frequency radiating patches. The electromagnetic wave signal radiated from space forms a surface current on the high-frequency radiating patch and the low-frequency radiating patch, and together with the feed cavity, forms a high- and low-frequency resonance, which is finally transmitted to the feed connector. The top of the antenna mounting frame is detachably connected to the antenna cover, and the two mounting bases are fixedly connected. The high-frequency radiating patch is fixedly connected to the mounting base. The feed cavity is located between the high-frequency radiating patch and the low-frequency radiating patch, with the low-frequency radiating patch located below and the high-frequency radiating patch located above. The two are parallel and separated by a certain distance through a dielectric support or an air layer, forming a double-layer resonant structure.

[0007] Preferably, the receiving antenna and the transmitting antenna further include a choke groove, which is formed on the inner wall of the mounting base and has an annular groove structure.

[0008] Preferably, the inner wall of the mounting base has two screw holes and a slot, the power supply connector is installed in the slot, and a fastening bolt is threaded into the screw hole, the fastening bolt pair limits the position of the power supply connector and the mounting base.

[0009] Preferably, a connecting wire harness is fixedly installed at one end of the power supply connector.

[0010] Preferably, the low-frequency radiation patch has a wire harness hole at its top, and the connecting wire harness passes through the wire harness hole.

[0011] Preferably, the top of the radome is provided with several mating holes, and the mating holes are threadedly connected to the antenna mounting frame with mating bolts.

[0012] Preferably, a reinforcing frame is fixedly installed on the inner wall of the antenna mounting frame, the mounting plate is fixedly connected to the reinforcing frame, and a plurality of fastening bolts are threadedly connected between the mounting base and the reinforcing frame.

[0013] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows: 1. This utility model provides a broadband vehicle-mounted data link antenna, which is sealed to the radome and the mounting frame by mating bolts. The internal reinforcement frame and fastening bolts fix the mounting base, forming a waterproof and dustproof sealed structure to protect the internal patch and feed cavity from environmental corrosion. At the same time, the radome is made of wave-transparent material to ensure efficient transmission of electromagnetic waves in the working frequency band and maintain performance stability. The mounting and disassembly structure is locked by mating screw holes, which is simple and convenient for staff to understand the structure, improves equipment maintenance efficiency, and has strong applicability.

[0014] 2. This utility model provides a broadband vehicle-mounted data link antenna. Through a double-layer parallel stacked structure of high-frequency radiating patches and low-frequency radiating patches, combined with a feeding cavity to form a composite resonant system, it breaks through the limitation of the traditional microstrip antenna's operating bandwidth of only a few percent, realizes multi-band collaborative operation, and meets the broadband communication requirements of vehicle-mounted data links. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the antenna mounting frame in this utility model; Figure 3 This is a three-dimensional structural diagram of the antenna mounting frame in this utility model; Figure 4 This is a three-dimensional structural diagram of the mounting base in this utility model; Figure 5 This is a cross-sectional structural diagram of the mounting base in this utility model; Figure 6 This is a cross-sectional structural diagram of the mounting base in this utility model.

[0016] In the picture: 1. Antenna radome; 101. Docking hole; 102. Docking bolt; 2. Antenna mounting frame; 201. Mounting plate; 202. Reinforcing bracket; 3. Mounting base; 301. Receiving antenna; 302. Transmitting antenna; 303. Slot; 304. Screw hole; 305. Wire harness hole; 4. Fastening bolt two; 5. High-frequency radiating patch; 6. Low-frequency radiating patch; 7. Feed cavity; 8. Feed connector; 801. Connecting wire harness; 802. Fastening bolt one; 9. Choke slot. Detailed Implementation

[0017] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, the following describes this utility model in conjunction with specific embodiments: like Figure 1-6As shown, this utility model provides a broadband vehicle-mounted data link antenna, including an antenna mounting frame 2. A mounting plate 201 is fixedly installed inside the antenna mounting frame 2. Two storage slots are formed on the top of the mounting plate 201, and a receiving antenna 301 and a transmitting antenna 302 are respectively disposed in the two storage slots. Both the receiving antenna 301 and the transmitting antenna 302 include a mounting base 3, a high-frequency radiating patch 5, a low-frequency radiating patch 6, a feed cavity 7, and a feed connector 8. Electromagnetic waves are fed into the feed cavity 7 from the feed connector 8 in the mounting base 3. Under the combined action of the feed cavity 7, the high-frequency radiating patch 5, and the low-frequency radiating patch 6, a high- and low-frequency resonance is formed. Finally, the high-frequency radiating patch 5 and the low-frequency radiating patch 6 radiate electromagnetic wave signals into space. The electromagnetic waves radiated from space form surface currents on the high-frequency radiating patch 5 and the low-frequency radiating patch 6, and together with the feed cavity 7, form a high- and low-frequency resonance, which is then transmitted to the feed connector 8. An antenna cover 1 is detachably connected to the top of the antenna mounting frame 2. Two mounting bases 3 are fixedly connected. The low-frequency radiating patch 6 is fixedly installed at one end of the high-frequency radiating patch 5. The high-frequency radiating patch 5 is fixedly connected to the mounting base 3. The feeding cavity 7 is set between the high-frequency radiating patch 5 and the low-frequency radiating patch 6. The low-frequency radiating patch 6 is located below, and the high-frequency radiating patch 5 is located above. The two are parallel and separated by a certain distance through a dielectric support or an air layer to form a double-layer resonant structure. The receiving antenna 301 and the transmitting antenna 302 also include a choke groove 9. The choke groove 9 is opened on the inner wall of the mounting base 3 and has an annular groove structure. The inner wall of the mounting base 3 has two screw holes 304 and a slot 303. The feeding connector 8 is installed in the slot 303. The screw hole 304 is threaded with a fastening bolt 802. The fastening bolt 802 limits the feeding connector 8 and the mounting base 3. A connecting wire harness 801 is fixedly installed at one end of the feeding connector 8. A wire harness hole 305 is opened on the top of the low-frequency radiating patch 6. The connecting wire harness 801 passes through the wire harness hole 305.

[0018] Electromagnetic waves are input from the feed connector 8 and transmitted to the feed cavity 7 via the connecting harness 801. The feed cavity 7 forms electromagnetic coupling with the upper high-frequency radiating patch 5 and the lower low-frequency radiating patch 6, exciting a high-low frequency composite resonance. The electromagnetic waves generated by the resonance are radiated into space by the high-frequency radiating patch 5 and the low-frequency radiating patch 6. The two layers of patches work together to extend the radiation frequency band, achieving wideband transmission. The choke groove 9 suppresses the surface current of the feed cavity 7 wall, preventing current leakage that could cause beam distortion and ensuring accurate radiation direction. The electromagnetic waves radiated into space act on the high-frequency radiating patch 5 and the low-frequency radiating patch 6, forming an induced current on the patch surface. The induced current and the feed cavity 7 form a resonant system, converting the electromagnetic wave energy into an electrical signal. The electrical signal is transmitted to the feed connector 8 through the internal structure of the feed cavity and output to the vehicle signal system through the connecting harness 801. The choke groove 9 also suppresses the surface current of the feed cavity 7, preventing external interference signals from causing beam distortion, improving signal reception quality, and enhancing the signal transmission and reception effect of the equipment.

[0019] like Figure 1-2 In one embodiment, the top of the antenna radome 1 is provided with a plurality of docking holes 101, and the docking holes 101 are threadedly connected to the antenna mounting frame 2 by docking bolts 102.

[0020] The antenna cover 1 can be removed from one end of the antenna mounting frame 2 by rotating several mating bolts 102, making replacement and maintenance easy and highly applicable.

[0021] like Figure 3 In one embodiment, a reinforcing frame 202 is fixedly installed on the inner wall of the antenna mounting frame 2, the mounting plate 201 is fixedly connected to the reinforcing frame 202, and a plurality of fastening bolts 4 are threadedly connected between the mounting base 3 and the reinforcing frame 202.

[0022] The reinforcement frame 202 and the mounting base 3 are locked by several fastening bolts 24. The mounting base 3 can be removed from the bottom of the reinforcement frame 202 and the antenna mounting frame 2 by removing the fastening bolts 24 during structural disassembly. The disassembly method is simple and highly applicable.

[0023] The working principle of this broadband vehicle-mounted data link antenna will be explained in detail below: Transmitting antenna 302 transmission state operation: Electromagnetic waves are input from the feed connector 8 and transmitted to the feed cavity 7 through the connecting wire harness 801. The feed cavity 7 forms electromagnetic coupling with the upper high-frequency radiating patch 5 and the lower low-frequency radiating patch 6, which excites high- and low-frequency composite resonance. The electromagnetic waves generated by the resonance are radiated into space by the high-frequency radiating patch 5 and the low-frequency radiating patch 6. The two-layer patch works together to extend the radiation frequency band and realize wideband transmission. The choke slot 9 suppresses the surface current of the feed cavity 7 wall to avoid current leakage and beam distortion, and ensures accurate radiation direction. Receiving antenna 301 receiving state working process: The electromagnetic waves radiated in space act on the high-frequency radiating patch 5 and the low-frequency radiating patch 6, forming an induced current on the patch surface. The induced current and the feed cavity 7 form a resonant system, converting the electromagnetic wave energy into an electrical signal. The electrical signal is transmitted to the feed connector 8 through the internal structure of the feed cavity, and then output to the vehicle signal system through the connecting wire harness 801. The choke slot 9 also suppresses the surface current of the feed cavity 7 to prevent external interference signals from causing receiving beam distortion and improve signal reception quality. When it is necessary to disassemble the equipment, the antenna cover 1 can be removed by rotating several connecting bolts 102 and disassembling the connecting bolts 102. At the same time, by rotating the second fastening bolt 4, the mounting base 3 can be removed from the inside of the antenna mounting frame 2. The disassembly method is simple and clear, and convenient for staff to operate.

[0024] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A broadband vehicle-mounted data link antenna, comprising an antenna mounting frame (2), characterized in that: An installation plate (201) is fixedly installed inside the antenna mounting frame (2). Two storage slots are opened on the top of the installation plate (201), and a receiving antenna (301) and a transmitting antenna (302) are respectively installed in the two storage slots. Both the receiving antenna (301) and the transmitting antenna (302) include a mounting base (3), a high-frequency radiating patch (5), a low-frequency radiating patch (6), a feed cavity (7), and a feed connector (8). Electromagnetic waves are fed into the feed cavity (7) from the feed connector (8) in the mounting base (3). Under the combined action of the feed cavity (7), the high-frequency radiating patch (5), and the low-frequency radiating patch (6), a high- and low-frequency resonance is formed. Finally, the high-frequency radiating patch (5) and the low-frequency radiating patch (6) radiate electromagnetic wave signals into space. Electromagnetic waves radiated from space form surface currents on the high-frequency radiating patch (5) and the low-frequency radiating patch (6), and together with the feed cavity (7), form high- and low-frequency resonances, which are finally transmitted to the feed connector (8). The antenna mounting frame (2) is detachably connected to the top of the antenna cover (1). The two mounting bases (3) are fixedly connected to the low-frequency radiating patch (6) and fixedly installed at one end of the high-frequency radiating patch (5). The high-frequency radiating patch (5) is fixedly connected to the mounting base (3). The feed cavity (7) is located between the high-frequency radiating patch (5) and the low-frequency radiating patch (6). The low-frequency radiating patch (6) is located below, and the high-frequency radiating patch (5) is located above. The two are parallel and separated by a certain distance through a dielectric support or an air layer to form a double-layer resonant structure.

2. The broadband vehicle-mounted data link antenna according to claim 1, characterized in that: The receiving antenna (301) and the transmitting antenna (302) also include a choke groove (9), which is formed on the inner wall of the mounting base (3) and has an annular groove structure.

3. The broadband vehicle-mounted data link antenna according to claim 1, characterized in that: The inner wall of the mounting base (3) has two screw holes (304) and a slot (303). The power supply connector (8) is installed in the slot (303). A fastening bolt (802) is threaded into the screw hole (304). The fastening bolt (802) limits the position of the power supply connector (8) and the mounting base (3).

4. A broadband vehicle-mounted data link antenna according to claim 1, characterized in that: A connecting wire harness (801) is fixedly installed at one end of the power supply connector (8).

5. A broadband vehicle-mounted data link antenna according to claim 4, characterized in that: The low-frequency radiation patch (6) has a wire harness hole (305) at its top, and the connecting wire harness (801) passes through the wire harness hole (305).

6. A broadband vehicle-mounted data link antenna according to claim 1, characterized in that: The top of the radome (1) is provided with several docking holes (101), and the docking holes (101) are threadedly connected to the antenna mounting frame (2) by docking bolts (102).

7. A broadband vehicle-mounted data link antenna according to claim 1, characterized in that: The inner wall of the antenna mounting frame (2) is fixedly installed with a reinforcing frame (202), the mounting plate (201) is fixedly connected to the reinforcing frame (202), and the mounting base (3) is threadedly connected to the reinforcing frame (202) with several fastening bolts (4).

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