Anti-explosion low-profile knife-shaped antenna

Abstract

The utility model discloses an anti-explosion low-profile knife-shaped antenna, which comprises a first PCB (printed circuit board) and a second PCB, the first PCB is connected with the second PCB, the first PCB is provided with an antenna radiator used for exciting medium-high frequency resonance, the second PCB is provided with a PCB wire, the antenna radiator and the PCB wire form a coupling capacitor, the coupling capacitor is connected with the first PCB, and the second PCB is connected with the second PCB. And an included angle is formed between the first PCB and the second PCB to excite low-frequency resonance. According to the utility model, the antenna radiator and the PCB wire can be placed at a specific angle and distance to generate a coupling capacitance effect, and low-frequency resonance can be excited, so that the low-frequency bandwidth can be expanded, meanwhile, a series RLC circuit is not used, the energy loss is reduced, and the radiation efficiency of the antenna is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and particularly relates to an explosion-proof low-profile knife-shaped antenna. Background Art

[0002] In the field of wireless communication, as a key component for signal transmission and reception, the performance of an antenna is directly related to the overall effect of a communication system. Especially in a vehicle-mounted communication system, the antenna needs to have excellent electrical performance, such as a relatively wide operating frequency band and high radiation efficiency.

[0003] Traditional vehicle-mounted ultra-short wave antennas have obvious limitations in terms of the operating frequency band and are difficult to meet the requirements of modern communication systems for broadband communication. To overcome this defect, researchers have tried to broaden the bandwidth of the antenna by loading an RLC matching network at the input end of the antenna. However, although this method has achieved a certain degree of bandwidth expansion, it inevitably reduces the radiation efficiency of the antenna, thus affecting the overall performance of the communication system. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an explosion-proof low-profile knife-shaped antenna, aiming to solve problems such as low radiation efficiency of existing antennas.

[0005] An embodiment of the utility model provides an explosion-proof low-profile knife-shaped antenna, including: a first PCB board and a second PCB board, the first PCB board and the second PCB board are connected, an antenna radiator for exciting medium and high-frequency resonance is arranged on the first PCB board, a PCB trace is arranged on the second PCB board, the antenna radiator and the PCB trace form a coupling capacitor, and an included angle is provided between the first PCB board and the second PCB board to excite low-frequency resonance.

[0006] Further, it further includes: a housing, an accommodation cavity is arranged inside the housing, and the first PCB board and the second PCB board are both installed in the accommodation cavity.

[0007] Further, the height of the housing is less than or equal to 15 cm.

[0008] Further, the material of the housing is an explosion-proof material.

[0009] Further, it further includes at least one magnetic attracting member, and at least one magnetic attracting member is installed at the bottom of the housing.

[0010] Further, at least one magnetic attracting member is detachably installed at the bottom of the housing.

[0011] Further, it further includes: a chassis, one end of the first PCB board is vertically mounted on the chassis, one end of the second PCB board is obliquely mounted on the chassis, and the other end of the first PCB board is connected to the other end of the second PCB board.

[0012] Further, the PCB trace is a serpentine trace.

[0013] Further, it further includes: an antenna feeder, and the antenna feeder is connected to the first PCB board.

[0014] Further, the antenna radiator is a monopole antenna.

[0015] The utility model discloses an anti-explosion low-profile knife-shaped antenna, which includes: a first PCB board and a second PCB board, the first PCB board and the second PCB board are connected, an antenna radiator for exciting medium and high-frequency resonance is arranged on the first PCB board, a PCB trace is arranged on the second PCB board, the antenna radiator and the PCB trace form a coupling capacitor, and an included angle is formed between the first PCB board and the second PCB board to excite low-frequency resonance. Through the antenna radiator and the PCB trace, the utility model can generate a coupling capacitor effect by arranging them at a specific angle and distance, can excite low-frequency resonance, thereby can expand the low-frequency bandwidth. At the same time, without using a series RLC circuit, energy loss is reduced, and the radiation efficiency of the antenna is also improved. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram of the first perspective of the anti-explosion low-profile knife-shaped antenna;

[0018] Figure 2 It is a schematic structural diagram of the second perspective of the anti-explosion low-profile knife-shaped antenna;

[0019] Figure 3 It is a schematic structural diagram of the anti-explosion low-profile knife-shaped antenna (removing the housing and the magnetic part);

[0020] Figure 4 It is a schematic structural diagram of the first perspective between the first PCB board and the second PCB board;

[0021] Figure 5 It is a schematic structural diagram of the second perspective between the first PCB board and the second PCB board;

[0022] Figure 6 Data schematic diagram of the standing wave of an anti-riot low-profile knife-shaped antenna;

[0023] Figure 7 For the horizontal pattern at 350 - 390 MHz;

[0024] Figure 8 For the vertical pattern at 350 - 390 MHz;

[0025] Description of the markings in the figure:

[0026] 1. First PCB board; 2. Second PCB board; 3. Antenna radiator; 4. PCB trace; 5. Outer shell; 6. Magnetic part; 7. Screw; 8. Chassis; 9. Connector; 10. Antenna feeder. Specific implementation mode

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0028] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0029] It should also be understood that the terms used in this specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. As used in this specification of the present utility model and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0030] It should be further understood that the term " / and / " used in this specification of the present utility model and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0031] Please refer to Figures 1-5, this embodiment provides an anti-riot low-profile knife-shaped antenna, including: a first PCB board 1 and a second PCB board 2, the first PCB board 1 and the second PCB board 2 are connected, an antenna radiator 3 for exciting medium and high-frequency resonance is arranged on the first PCB board 1, a PCB trace 4 is arranged on the second PCB board 2, the antenna radiator 3 and the PCB trace 4 form a coupling capacitor, and an included angle is provided between the first PCB board 1 and the second PCB board 2 to excite low-frequency resonance.

[0032] In this embodiment, the antenna radiator 3 and the PCB trace 4 can be arranged at a specific angle and distance to generate a coupling capacitance effect, which can excite low-frequency resonance, thereby expanding the low-frequency bandwidth. At the same time, without using a series RLC circuit, the energy loss is reduced, and the radiation efficiency of the antenna is also improved.

[0033] Among them, the PCB trace 4 is a serpentine trace, and the serpentine trace is an equivalent inductor. The antenna radiator 3 is a monopole antenna. The monopole antenna can generate medium and high frequencies.

[0034] In this embodiment, it also includes: a housing 5 (as Figure 1 shown), a receiving cavity is arranged inside the housing 5, and both the first PCB board 1 and the second PCB board 2 are installed in the receiving cavity.

[0035] The presence of the housing 5 provides a strong protective layer for the internal PCB board, effectively preventing the erosion and damage of the circuit board by factors such as dust, moisture, and vibration in the external environment. This protection measure extends the service life of the PCB board and the entire device, and improves the reliability and stability of the system.

[0036] Since the antenna needs to meet the aerodynamic requirements of vehicle design to ensure stability and safety during driving. Therefore, the antenna needs to meet certain aerodynamic and passability requirements. So the size of the antenna cannot be too large, while the size of ordinary antennas is too high. When installed on the top of the vehicle, it is easy to interfere with the roof rotating equipment or interfere with the height limit device when passing through the tunnel. For this reason, in this embodiment, the height of the housing 5 is less than or equal to 15 cm. At this time, when the antenna is installed on vehicles and ships, the vehicles and ships have good passability.

[0037] In this embodiment, the material of the housing 5 is an anti-riot material.

[0038] The housing 5 made of anti-riot material can withstand destructive forces such as violent knocking, impact, and shearing, and at the same time has certain flame retardant properties to avoid damage caused by external forces.

[0039] Among them, the anti-riot material can be alloy aluminum material, or PC material, or other materials that can withstand destructive forces such as violent knocking, impact, and shearing.

[0040] In this embodiment, it further includes at least one magnetic part 6 (such as Figure 2 shown), and at least one magnetic part 6 is installed at the bottom of the housing 5.

[0041] The addition of the magnetic part 6 enables the antenna to be quickly installed and disassembled by magnetic force, without the need to use traditional fixing methods such as screws and buckles. This not only simplifies the installation process and improves the operation efficiency, but also avoids problems such as screw loosening or damage caused by frequent disassembly. Among them, the antenna and the vehicle body are grounded by magnetic adsorption.

[0042] At least one magnetic part 6 is detachably installed at the bottom of the housing 5.

[0043] The detachable magnetic part 6 allows the user to adjust or replace the position, quantity or type of the magnetic part 6 according to actual needs. This flexibility enables the device to better adapt to different usage scenarios and personalized requirements, improving the device's customization and practicality. If the magnetic part 6 is damaged for some reason, since it is detachable, the user can replace the magnetic part 6 alone without replacing the entire housing 5. This greatly reduces the maintenance cost and reduces the inconvenience that may be brought about by replacing the entire housing 5.

[0044] Specifically, at least one magnetic part 6 is detachably installed at the bottom of the housing 5 through screws 7.

[0045] Although screws 7 are required for installation, this design still maintains a high degree of convenience. The user can easily install or disassemble the magnetic part 6 with a simple tool (such as a screwdriver), without complex operations or professional skills. This flexibility allows the user to adjust the position or quantity of the magnetic part 6 as needed.

[0046] Among them, the magnetic part 6 can be a natural magnet or an electromagnet.

[0047] In this embodiment, it further includes: a chassis 8 (such as Figure 3 and Figure 4 shown), one end of the first PCB board 1 is vertically installed on the chassis 8, one end of the second PCB board 2 is obliquely installed on the chassis 8, and the other end of the first PCB board 1 is connected to the other end of the second PCB board 2.

[0048] By vertically installing the first PCB board 1 on the chassis 8 and obliquely installing the second PCB board 2, not only is the space effectively utilized, but also an efficient layout between the PCB boards is achieved. This layout method helps to reduce the volume of the entire device and make it more compact.

[0049] Specifically, it further includes: a connecting piece 9 (such as Figure 4As shown, one end of the connecting member 9 is detachably connected to the chassis 8 by screws 7, and the other end of the connecting member 9 is detachably connected to one end of the first PCB board 1 by screws 7.

[0050] The connecting member 9 is an L-shaped connecting member 9. Since both ends of the L-shaped connecting member 9 are detachable, the installation and disassembly processes become very simple and fast. Users can quickly complete the installation or disassembly work without complex tools or professional skills. This not only improves work efficiency but also reduces maintenance costs. The L-shaped connecting member 9 has strong stability and support force in structure. It can effectively fix the first PCB board 1 on the chassis 8 to ensure a firm connection between the two. Even when subjected to external impacts or vibrations, it can maintain the overall stability of the device and protect the internal components from damage.

[0051] In this embodiment, it further includes: an antenna feeder 10 (as Figure 3 shown), and the antenna feeder 10 is connected to the first PCB board 1.

[0052] The antenna feeder 10 is directly connected to the first PCB board 1, ensuring the efficiency and accuracy of signal transmission. This direct connection method reduces signal attenuation and interference during transmission, thereby improving the communication quality and stability of the device.

[0053] In this embodiment, as shown in Table 1, a simulated 1-meter whip standard antenna is placed on the 1.3-meter vehicle head and the antenna of this embodiment is placed on the 1.9-meter vehicle roof (the same position but different heights) for communication comparison. It can be seen that the antenna communication effect of this embodiment is significantly better than that of the whip antenna.

[0054] Table 1

[0055]

[0056]

[0057] Please refer to Figures 6-8 , the standing wave data of the antenna in this embodiment is: the standing wave is less than 3 at 350 - 390 MHz. The horizontal pattern of the antenna in this embodiment at 50 - 390 MHz is omnidirectional radiation.

[0058] The antenna in this embodiment has excellent electrical performance and is expected to be used in 5000 armored vehicles, 25,000 assault vehicles, 20 ships, and 147 speedboats. Its size is smaller and its height is lower than that of similar products. It adopts an explosion-proof design, modular segmented design, screw fixation, is convenient for assembly and disassembly, has reliable connection, and small impedance.

[0059] The various embodiments in the specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0060] It should also be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion.

[0061] Comprising, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without more limitations, an element defined by the statement "including an..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

Claims

1. A vandal-proof low-profile blade antenna, characterized in that: include: A first PCB board and a second PCB board, the first PCB board and the second PCB board are connected, an antenna radiator for exciting medium and high frequency resonance is arranged on the first PCB board, a PCB trace is arranged on the second PCB board, the antenna radiator and the PCB trace constitute a coupling capacitor, and an angle is formed between the first PCB board and the second PCB board to excite low frequency resonance.

2. The anti-riot low profile blade antenna according to claim 1, characterized in that: Also includes: The housing has a housing in which the first PCB board and the second PCB board are installed.

3. The anti-riot low profile blade antenna according to claim 2, characterized in that: The height of the shell is less than or equal to 15 cm.

4. The anti-riot low profile blade antenna according to claim 2, characterized in that: The material of the shell is anti-riot material.

5. The anti-riot low profile blade antenna according to claim 2, characterized in that: It also includes at least one magnetic attraction component, and at least one of the magnetic attraction components is installed at the bottom of the shell.

6. The anti-riot low profile blade antenna according to claim 5, characterized in that: At least one of the magnetic elements is detachably mounted on the bottom of the housing.

7. The anti-vandal low profile blade antenna according to claim 1, characterized in that: Also includes: A chassis, one end of the first PCB board is vertically mounted on the chassis, one end of the second PCB board is obliquely mounted on the chassis, and the other end of the first PCB board is connected to the other end of the second PCB board.

8. The vandal-proof low-profile blade antenna according to claim 1, characterized in that: The PCB routing is a serpentine routing.

9. The anti-vandal low profile blade antenna according to claim 1, characterized in that: Also includes: An antenna feed line is connected to the first PCB board.

10. The vandal-proof low-profile blade antenna according to claim 1, characterized in that: The antenna radiator is a monopole antenna.

Images