Antistatic antenna and communication device

Abstract

The application provides an anti-static antenna and a communication device. The anti-static antenna comprises a dielectric substrate, a coaxial line and a radiator. The radiator is arranged on the dielectric substrate. The radiator comprises a radiation part and a grounding part. The radiator is electrically connected with an inner conductor. The grounding part is electrically connected with a shielding layer. The radiator further comprises an anti-static part which is electrically connected between the radiator and the grounding part. The anti-static antenna provided by the application has the advantage of good anti-static effect.

Description

Technical Field

[0001] This application belongs to the field of communication technology, and more specifically, relates to an anti-static antenna and communication equipment. Background Technology

[0002] In wireless communication devices such as wireless routers, the antenna is exposed to the external environment through gaps in the casing or directly, which provides conditions for electrostatic discharge (ESD). When static electricity flows into electronic components such as power amplifiers, low-noise amplifiers, and radio frequency chips in wireless communication devices, it will cause damage to the components and thus damage the wireless communication device.

[0003] However, antennas in related technologies suffer from poor anti-static capabilities and large space requirements for anti-static components. Utility Model Content

[0004] The purpose of this application is to provide an anti-static antenna and a communication device to solve the problems of poor anti-static capability and large space occupation of anti-static components in the prior art.

[0005] In a first aspect, embodiments of this application provide an anti-static antenna.

[0006] The antistatic antenna provided in this application includes a dielectric substrate; a radiator disposed on the dielectric substrate, the radiator including a radiating part and a grounding part, the radiator being electrically connected to the inner conductor of the coaxial line, and the grounding part being electrically connected to the shielding layer of the coaxial line; wherein, the radiator further includes an antistatic part, the antistatic part being electrically connected between the radiator and the grounding part.

[0007] The beneficial effects of the antistatic antenna provided in this application embodiment are as follows: Compared with the prior art, the antistatic antenna provided in this application embodiment integrates the radiating part, the grounding part and the antistatic part on the same dielectric substrate, reducing the space occupied by the antistatic part. The antistatic part can conduct the static electricity accumulated in the radiating part to the shielding layer of the coaxial line through the grounding part. While achieving miniaturization, it improves the antistatic capability of the antistatic antenna provided in this application embodiment, so that the antistatic antenna provided in this application embodiment has the advantage of better antistatic capability.

[0008] In addition, the antistatic part, radiating part and grounding part of the antistatic antenna provided in this application embodiment are all integrated on the same dielectric substrate, reducing the space occupied by the antistatic part.

[0009] In some embodiments, the radiator further includes a power supply section connected between the radiator and the inner conductor, and the antistatic section is electrically connected to the power supply section.

[0010] In some embodiments, one end of the power supply section is connected to the radiator, the other end of the power supply section is connected to the inner conductor, and the two ends of the power supply section are connected to the antistatic section.

[0011] In some embodiments, the path length of the electrical signal in the inner conductor conducted along the antistatic portion from the power supply portion to the grounding portion is one-quarter of the wavelength corresponding to the center frequency of the electrical signal.

[0012] In some embodiments, the width of the antistatic part is greater than or equal to 0.5 mm.

[0013] In some embodiments, the radiating portion extends along a first direction, one end of the radiating portion in the first direction is connected to the power supply portion, and the antistatic portion includes a first segment, a second segment, and a third segment connected in sequence, the first segment being connected to the power supply portion, the third segment being connected to the grounding portion, and both the second segment and the third segment extending along the first direction;

[0014] Wherein, the ratio of the sum of the lengths of the second segment and the third segment to the path length of the electrical signal in the inner conductor conducted along the antistatic part from the power supply part to the grounding part is greater than or equal to 0.75.

[0015] In some embodiments, the angle between the extension direction of the first segment and the first direction is less than or equal to 45°.

[0016] In some embodiments, the grounding portion includes a connection portion and an equivalent ground portion, the shielding layer is electrically connected to the connection portion, the antistatic portion is electrically connected to the connection portion, the equivalent ground portion is electrically connected to the connection portion, and the length of the equivalent ground portion is one-quarter of the wavelength corresponding to the intermediate frequency of the electrical signal in the inner conductor.

[0017] In some embodiments, one end of the connecting portion is connected to the equivalent ground portion, the other end of the connecting portion is connected to the antistatic portion, and the two ends of the connecting portion are connected to the shielding layer.

[0018] Secondly, embodiments of this application provide a communication device.

[0019] The communication device provided in this application includes the anti-static antenna described in any of the above embodiments.

[0020] It is understandable that the beneficial effects of the second aspect mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the structure of the antistatic antenna provided in Embodiment 1 of this application;

[0023] Figure 2 A schematic diagram of the coaxial cable structure of the antistatic antenna provided in the embodiments of this application;

[0024] Figure 3 A schematic diagram of the structure of the antistatic antenna provided in Embodiment 2 of this application;

[0025] Figure 4 A schematic diagram of the structure of the antistatic antenna provided in Embodiment 3 of this application;

[0026] Figure 5 A schematic diagram of the structure of the antistatic antenna provided in Embodiment 4 of this application;

[0027] Figure 6 A schematic diagram of the reflection coefficient of an antistatic antenna provided for an embodiment of this application.

[0028] The following are the labeling elements in the figure:

[0029] 100. Anti-static antenna;

[0030] 10. Dielectric substrate;

[0031] 20. Radiator; 21. Radiating section; 22. Grounding section; 221. Connecting section; 222. Equivalent ground section; 23. Antistatic section; 231. First section; 232. Second section; 233. Third section; 24. Power supply section;

[0032] 30. Coaxial cable; 31. Inner conductor; 32. Shielding layer; 33. First insulating layer; 34. Second insulating layer. Detailed Implementation

[0033] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0034] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0035] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0037] In wireless communication devices such as wireless routers, the antenna is exposed to the external environment through gaps in the casing or directly, which provides conditions for electrostatic discharge (ESD). When static electricity flows into electronic components such as power amplifiers, low-noise amplifiers, and radio frequency chips in wireless communication devices, it will cause damage to the components and thus damage the wireless communication device.

[0038] However, the antennas in this technology have poor anti-static capabilities.

[0039] This application provides an antistatic antenna and a communication device using the antistatic antenna. The antistatic antenna provided in this application integrates a radiating part, a grounding part, and an antistatic part on the same dielectric substrate. The antistatic part conducts static electricity in the radiating part to the shielding layer of the coaxial line, thereby improving the antistatic effect of the antistatic antenna.

[0040] Please refer to the following: Figure 1 and Figure 2 The antistatic antenna 100 provided in the embodiments of this application will now be described.

[0041] The antistatic antenna 100 provided in this application embodiment includes a dielectric substrate 10 and a radiator 20.

[0042] The radiator 20 is fed by a coaxial cable 30, such as Figure 2As shown, the coaxial cable 30 includes an inner conductor 31 and a shielding layer 32. The inner conductor 31 is used to be electrically connected to the signal source, and the shielding layer 32 is used to be grounded to form a signal loop, thus forming a transmission line structure with the inner conductor 31.

[0043] like Figure 2 As shown, the shielding layer 32 is sleeved on the outside of the inner conductor 31. In some embodiments, a first insulating layer 33 is provided between the shielding layer 32 and the inner conductor 31, and a second insulating layer 34 is provided on the outside of the shielding layer 32.

[0044] The inner conductor 31 is used to electrically connect to the signal source to conduct the electrical signal in the signal source to the radiator 20. The shielding layer 32 is grounded. On the one hand, the shielding layer 32 and the inner conductor 31 form a signal loop and constitute a transmission line structure. On the other hand, the shielding layer 32 shields the inner conductor 31 from external electromagnetic interference, prevents signal leakage, and avoids the electrical signal conducted in the inner conductor 31 from radiating interference to other devices.

[0045] The radiator 20 is disposed on the dielectric substrate 10. The radiator 20 includes a radiating part 21 and a grounding part 22. The radiator 20 is electrically connected to the inner conductor 31, and the grounding part 22 is electrically connected to the shielding layer 32.

[0046] like Figure 1 As shown, the radiator 20 is a metal patch, which is disposed on the same surface of the dielectric substrate 10. The radiator 20 includes a radiating part 21 and a grounding part 22. The radiator 20 is connected to the signal source through the inner conductor 31. The electrical signal in the signal source is conducted to the radiator 20 through the inner conductor 31, causing electromagnetic oscillation in the radiator 20 and thus exciting the electromagnetic beam. The grounding part 22 is grounded through the shielding layer 32.

[0047] In some embodiments, such as Figure 1 As shown, the radiating part 21 is a Franklin antenna.

[0048] In other embodiments, such as Figure 3 As shown, the radiating part 21 is a patch antenna.

[0049] Thus, on the one hand, the grounding part 22 provides a stable zero-potential reference point for the antenna system, ensuring that the potentials of the radiator 20 and the coaxial line 30 are relatively consistent, which helps to reduce signal distortion or noise caused by potential fluctuations. On the other hand, the grounding part 22 and the radiator 20 together form a specific impedance characteristic, reducing reflection loss and allowing more energy to be radiated out in the form of electromagnetic waves.

[0050] The radiator 20 also includes an anti-static part 23, which is electrically connected between the radiator 20 and the grounding part 22.

[0051] like Figure 1As shown, one end of the antistatic part 23 is connected to the radiating part 21, and the other end of the antistatic part 23 is connected to the grounding part 22, thereby conducting the static electricity in the radiator 20 to the grounding part 22, preventing the static current in the radiating part 21 from being conducted to the signal source along the inner conductor 31, and protecting the radio frequency circuit in the signal source.

[0052] The beneficial effects of the antistatic antenna 100 provided in this application embodiment are as follows: Compared with the prior art, the antistatic antenna 100 provided in this application embodiment integrates the radiating part 21, the grounding part 22 and the antistatic part 23 on the same dielectric substrate 10, reducing the space occupied by the antistatic part 23. The antistatic part 23 can conduct the static electricity accumulated in the radiating part 21 to the shielding layer 32 of the coaxial line 30 through the grounding part 22. While achieving miniaturization, it improves the antistatic capability of the antistatic antenna 100 provided in this application embodiment, so that the antistatic antenna 100 provided in this application embodiment has the advantage of better antistatic capability.

[0053] In addition, the antistatic part 23, the radiating part 21, and the grounding part 22 of the antistatic antenna 100 provided in this application embodiment are all integrated on the same dielectric substrate 10, reducing the space occupied by the antistatic part 23.

[0054] In some embodiments provided in this application, the radiator 20 further includes a power supply section 24, which is connected between the radiator 21 and the inner conductor 31, and the antistatic section 23 is electrically connected to the power supply section 24.

[0055] like Figure 1 As shown, the power supply section 24 is provided at the end of the radiator 20. On the one hand, the inner conductor 31 is welded to the power supply section 24 to reduce the influence of welding on the resonant frequency of the radiator 21. On the other hand, the power supply section 24 optimizes the input impedance when the electrical signal in the inner conductor 31 is transmitted to the radiator 21.

[0056] The antistatic part 23 is electrically connected to the power supply part 24. When the electrostatic current in the radiator 20 is conducted to the power supply part 24, the power supply part 24 conducts the electrostatic current to the grounding part 22 to prevent the electrostatic current from flowing into the inner conductor 31.

[0057] In some embodiments provided in this application, the connection between the antistatic part 23 and the power supply part 24 is located between the connection between the inner conductor 31 and the power supply part 24 and the radiator 20.

[0058] like Figure 1As shown, one end of the feed section 24 is connected to the radiating section 21, and the other end of the feed section 24 is welded to the inner conductor 31. The anti-static section 23 is connected to the feed section 24 at the middle section of the feed section 24. Before the electrostatic current in the radiating section 21 is conducted to the inner conductor 31, the anti-static section 23 guides the electrostatic current in the radiating section 21 to the grounding section 22, thereby further improving the anti-static performance of the anti-static antenna 100 provided in this embodiment.

[0059] In addition, such as Figure 1 As shown, the antistatic part 23 is connected to the radiating part 21, enabling the antistatic part 23 to function as an impedance adjustment structure to optimize the standing wave performance of the radiating part 21, such as... Figure 6 As shown, the antistatic antenna 100 provided in this application has a reflection coefficient of less than -15dB in the target frequency band of 2.4GHz-2.5GHz.

[0060] In some embodiments provided in this application, such as Figure 1 As shown, the path length of the electrical signal in the inner conductor 31, which is conducted from the power supply section 24 to the grounding section 22 along the anti-static section 23, is one-quarter of the wavelength corresponding to the center frequency of the electrical signal.

[0061] The electrical signal in the inner conductor 31 is an alternating AC signal. When the electrical signal is grounded through the anti-static part 23, which is one-quarter of its wavelength, the input impedance of the anti-static part 23 is open (high impedance).

[0062] Therefore, on the one hand, in a radio frequency system, direct grounding may cause signal reflection or energy loss. By using the quarter-wavelength antistatic part 23, the short-circuit state of the grounding part 22 can be converted into the high impedance of the antistatic part 23, thus avoiding signal short circuit. On the other hand, when the electrical signal passes through the antistatic part 23, which is one-quarter of its wavelength, a 90-degree phase delay (i.e., phase reversal) will occur. The electrical signal is reflected at the grounding part 22 to the connection between the antistatic part 23 and the power supply part 24. The total phase delay is 180 degrees, realizing phase reversal, so that the reflected wave of the electrical signal in the antistatic part 23 is out of phase with the incident wave.

[0063] In some embodiments provided in this application, the width of the antistatic part 23 is greater than or equal to 0.5 mm.

[0064] like Figure 1 As shown, the width of the antistatic part 23 is the dimension of the antistatic part 23 in the direction orthogonal to the direction of electrical signal propagation when the electrical signal is conducted inside the antistatic part 23. The antistatic part 23 has a large width dimension, thereby reducing the resistance of the antistatic part 23 and making the resistance of the antistatic part 23 less than the resistance of the inner conductor 31.

[0065] Therefore, when the electrostatic current in the radiating part 21 is conducted to the feeding part 24, the electrostatic current is conducted to the grounding part 22 through the anti-static part 23, preventing the electrostatic current from being conducted to the radio frequency circuit of the signal source through the inner conductor 31, and further protecting the radio frequency circuit in the signal source.

[0066] In some embodiments provided in this application, the radiating part 21 extends along the first direction x, and one end of the radiating part 21 in the first direction x is connected to the power supply part 24. The antistatic part 23 includes a first segment 231, a second segment 232 and a third segment 233 connected in sequence. The first segment 231 is connected to the power supply part 24, the third segment 233 is connected to the grounding part 22, and the second segment 232 and the third segment 233 both extend along the first direction x.

[0067] like Figure 1 As shown, the radiating part 21 extends along the first direction x so that the radiating part 21 generates a beam polarized along the first direction x. The second segment 232 and the third segment 233 both extend along the first direction x, so that when the electrical signal is conducted through the antistatic part 23, a beam polarized along the first direction x is generated in the second segment 232 and the third segment 233.

[0068] This reduces the interference of the beam generated in the antistatic section 23 on the antenna pattern of the antistatic antenna 100 provided in this embodiment.

[0069] In some embodiments provided in this application, such as Figure 1 As shown, the second segment 232 and the third segment 233 are connected and arranged in a direction orthogonal to the first direction x, so that the second segment 232 and the third segment 233 are equivalent to an inductor. The inductor can filter out part of the AC signal and allow DC or quasi-DC electrostatic current to pass through the second segment 232 and the third segment 233.

[0070] Therefore, the antistatic part 23 can reduce the electrical signals conducted through it, reduce the loss generated by the antistatic part 23, and reduce the impact of the antistatic part 23 on the gain of the antistatic antenna 100 provided in the embodiments of this application.

[0071] In some embodiments provided in this application, the ratio of the sum of the lengths of the second segment 232 and the third segment 233 to the path length of the electrical signal in the inner conductor 31 conducted along the antistatic portion 23 from the power supply portion 24 to the grounding portion 22 is greater than or equal to 0.75.

[0072] like Figure 1As shown, the second segment 232 and the third segment 233 extend along the first direction x, so that the portion of the antistatic part 23 that generates a beam with a polarization direction along the first direction x accounts for more than three-quarters of the antistatic part 23, thereby making the second segment 232 and the third segment 233 in the antistatic part 23 serve as part of the antenna radiator 20, thus optimizing the radiation effect of the antenna.

[0073] In some embodiments provided in this application, the angle between the extension direction of the first segment 231 and the first direction x is less than or equal to 45°.

[0074] It should be noted that the extension direction of the first segment 231 is the straight line where the geometric axis of the first segment 231 is located, and the first direction x is the straight line where the extension axis of the radiating part 21 is located. The first direction x and the extension direction of the first segment 231 have no directionality. The angle between the extension direction of the first segment 231 and the first direction x is one of the two angles less than 90° between the straight line where the geometric axis of the first segment 231 is located and the straight line parallel to the first direction x.

[0075] like Figure 4 As shown, the extension direction of the first segment 231 forms an angle with the first direction x, and the angle between the extension direction of the first segment 231 and the first direction x is less than 45°, which reduces the angle between the current conduction direction within the first segment 231 and the current conduction direction within the radiating part 21, compared to Figure 1 The first segment 231 is orthogonal to the first direction x, which reduces the impact of the beam generated by the first segment 231 on the antenna radiation pattern.

[0076] In some embodiments provided in this application, the grounding portion 22 includes a connecting portion 221 and an equivalent ground portion 222. The shielding layer 32 is electrically connected to the connecting portion 221, the anti-static portion 23 is electrically connected to the connecting portion 221, and the equivalent ground portion 222 is electrically connected to the connecting portion 221. The length of the equivalent ground portion 222 is one-quarter of the wavelength corresponding to the intermediate frequency of the electrical signal in the inner conductor 31.

[0077] like Figure 1 As shown, the connecting part 221 is welded to the shielding layer 32. The impedance between the shielding layer 32 and the grounding part 22 is optimized by the connecting part 221, so that the potential of the grounding part 22 remains stable.

[0078] The equivalent ground portion 222 is connected to the connecting portion 221, and the path length of the electrical signal propagated in the equivalent ground portion 222 is one-quarter of the wavelength corresponding to the center frequency of the electrical signal.

[0079] Therefore, when the electrical signal enters the equivalent ground portion 222, which is one-quarter of its wavelength, a 90-degree phase delay (i.e., phase reversal) will occur. The electrical signal is reflected at the end of the equivalent ground portion 222 to the connection point between the equivalent ground portion 222 and the connection portion 221. The total phase delay is 180 degrees, so that the phase of the electrical signal reflected from the equivalent ground portion 222 to the connection portion 221 is the same as the phase of the electrical signal reflected from GND to the connection portion 221 when the connection portion 221 is grounded.

[0080] In some embodiments provided in this application, such as Figure 1 As shown, the connection between the shielding layer 32 and the connecting part 221 is located between the connection between the antistatic part 23 and the connecting part 221 and the connection between the equivalent ground part 222 and the connecting part 221.

[0081] Therefore, the electrostatic current in the radiating part 21 is conducted to the GND of the signal source through the shielding layer 32. When the electrostatic current in the radiating part 21 is too large, part of the electrostatic current is conducted to the equivalent ground part 222.

[0082] In other embodiments, such as Figure 5 As shown, the connection point between the antistatic part 23 and the connecting part 221 is at the same position as the connection point between the shielding layer 32 and the connecting part 221. This reduces the path length of the electrostatic current in the antistatic part 23 to the shielding layer 32, thereby reducing the resistance of the electrostatic current in the antistatic part 23 to the shielding layer 32 and improving the antistatic effect of the antistatic antenna 100 provided in this embodiment.

[0083] The communication device provided in the embodiments of this application is described below.

[0084] The communication device provided in this application includes the antistatic antenna 100 in any of the above embodiments.

[0085] The anti-static antenna 100 provided in this application embodiment has the advantage of good anti-static effect, thereby giving the communication device provided in this application embodiment the advantage of low probability of damage to the radio frequency circuit due to static electricity, and improving the service life of the communication device provided in this application embodiment.

[0086] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An anti-static antenna, characterized in that, include: Dielectric substrate; A radiator is disposed on the dielectric substrate. The radiator includes a radiating part and a grounding part. The radiator is used to be electrically connected to the inner conductor of the coaxial line, and the grounding part is used to be electrically connected to the shielding layer of the coaxial line. The radiator further includes an anti-static component, which is electrically connected between the radiator and the grounding component.

2. The anti-static antenna as described in claim 1, characterized in that: The radiator further includes a power supply section connected between the radiator and the inner conductor, and the antistatic section is electrically connected to the power supply section.

3. The anti-static antenna as described in claim 2, characterized in that: One end of the power supply section is connected to the radiator, the other end of the power supply section is connected to the inner conductor, and the two ends of the power supply section are connected to the antistatic section.

4. The anti-static antenna as described in claim 2, characterized in that: The path length of the electrical signal in the inner conductor, conducted along the anti-static section from the power supply section to the grounding section, is one-quarter of the wavelength corresponding to the center frequency of the electrical signal.

5. The anti-static antenna as described in claim 2, characterized in that: The width of the antistatic part is greater than or equal to 0.5 mm.

6. The antistatic antenna as described in any one of claims 2-5, characterized in that: The radiating part extends along a first direction, and one end of the radiating part in the first direction is connected to the power supply part. The antistatic part includes a first segment, a second segment, and a third segment connected in sequence. The first segment is connected to the power supply part, the third segment is connected to the grounding part, and the second segment and the third segment both extend along the first direction. Wherein, the ratio of the sum of the lengths of the second segment and the third segment to the path length of the electrical signal in the inner conductor conducted along the antistatic part from the power supply part to the grounding part is greater than or equal to 0.

75.

7. The anti-static antenna as described in claim 6, characterized in that: The angle between the extension direction of the first segment and the first direction is less than or equal to 45°.

8. The antistatic antenna as described in any one of claims 1-5, characterized in that: The grounding part includes a connecting part and an equivalent ground part. The shielding layer is electrically connected to the connecting part, the anti-static part is electrically connected to the connecting part, and the equivalent ground part is electrically connected to the connecting part. The length of the equivalent ground part is one-quarter of the wavelength corresponding to the middle frequency of the electrical signal in the inner conductor.

9. The anti-static antenna as described in claim 8, characterized in that: One end of the connecting part is connected to the equivalent ground part, the other end of the connecting part is connected to the antistatic part, and the two ends of the connecting part are connected to the shielding layer.

10. A communication device, characterized in that, Includes the antistatic antenna as described in any one of claims 1-9.

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