Directional antenna and communication device

Abstract

The utility model provides a directional antenna and communication equipment, the directional antenna comprises a substrate, a first feed network and at least one radiation unit, the radiation unit comprises a first part, a second part and a third part which are sequentially arranged along a first direction, a first gap is arranged between the first part and the second part, and the first part and the second part are in coupling connection through the first gap. A second gap is formed between the second part and the third part, the second part and the third part are coupled and connected through the second gap, and a first feed part is arranged at the end, away from the second part, of the first part in the first direction; the first feed network is suitable for being connected with a first feed source, and the first feed network comprises a first signal and a second signal. The directional antenna provided by the utility model has the advantage of being capable of working in a double-frequency mode.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication, and more particularly relates to a directional antenna and a communication device. BACKGROUND

[0002] The working principle of the directional panel antenna is mainly based on its special structure and shape. By controlling the shape and size of the antenna, it can form strong electromagnetic wave radiation and receiving ability in a specific direction. However, the directional antenna in the related art cannot work in a dual-frequency mode. SUMMARY

[0003] The purpose of the embodiments of the present application is to provide a directional antenna and a communication device to solve the technical problem that the directional antenna in the prior art cannot work in a dual-frequency mode.

[0004] In a first aspect, the embodiments of the present application provide a directional antenna.

[0005] The directional antenna provided by the present application comprises a substrate; at least one radiation unit, which is arranged on the substrate, the radiation unit comprising a first part, a second part and a third part arranged in sequence along the first direction, a first gap being arranged between the first part and the second part, the first part and the second part being coupled and connected through the first gap, a second gap being arranged between the second part and the third part, the second part and the third part being coupled and connected through the second gap, the first part being provided with a first feeding part at the end part away from the second part along the first direction; a first feeding network, which is arranged on the substrate and coupled and connected with the first feeding part, the first feeding network being adapted to be connected with a first feed source, the electrical signal input into the first feeding network by the first feed source comprising a first signal and a second signal, the working frequency band of the first signal being different from that of the second signal, the working frequency of the first part in the first direction, the working frequency of the second part in the first direction and the working frequency of the third part in the first direction being all the same, and the working frequency of the first part in the first direction being located in the working frequency band of the first signal, the working frequency of the radiation unit in the first direction being located in the working frequency band of the second signal.

[0006] The directional antenna provided by the present application has the beneficial effects that the first feeding part of the radiation unit of the directional antenna is connected with the first input port of the first feeding network, the first signal and the second signal in the first feeding network are both input into the radiation unit through the first feeding part, the first signal in the first feeding network excites the radiation unit to produce TM 03 mode resonance, and the second signal in the first feeding network excites the whole radiation unit to produce TM 01 mode resonance, and the radiation unit can simultaneously produce TM01 mode resonance and TM 03 mode resonance, to utilize the TM 01 mode resonance and TM of the radiation unit 03 The mode resonance realizes dual-frequency operation, so that the directional antenna provided by the application has the function of dual-frequency communication.

[0007] Optionally, the second part is provided with a through slot, the through slot extends through the second part along a third direction, the through slot has a length dimension and a width dimension, the length dimension of the through slot extends along the first direction, the width dimension of the through slot extends along the second direction, the third direction is orthogonal to the first direction, and the third direction is orthogonal to the second direction.

[0008] Optionally, the directional antenna further comprises a second feed network, the second feed network is arranged on the substrate, and the second feed network is adapted to be connected with a second feed source, the second feed source inputs a third signal to the second feed network, the third signal has the same wavelength as the first signal, an end of the first part along the second direction is provided with a second feeding part, an end of the third part along the second direction is provided with a third feeding part, the second feed network is coupled and connected with the second feeding part, and the second feed network is coupled and connected with the third feeding part.

[0009] Optionally, the size of the first part in the second direction and the size of the third part in the second direction are both the wavelength of the third signal.

[0010] Optionally, the radiation unit has a plurality of units, the plurality of units include a first unit, a second unit, a third unit and a fourth unit, the first unit and the second unit are arranged at intervals along the first direction, and the third unit and the fourth unit are arranged at intervals along the first direction, the first unit and the third unit are arranged at intervals along the second direction, and the second unit and the fourth unit are arranged at intervals along the second direction.

[0011] The first feed network is connected between the first unit, the second unit, the third unit and the fourth unit, and the second feed network is connected between the first unit, the second unit, the third unit and the fourth unit.

[0012] Optionally, the first feed network includes a first wire and a second wire, one end of the first wire is coupled and connected with the first unit, the other end of the first wire is coupled and connected with the third unit, one end of the second wire is coupled and connected with the second unit, and the other end of the second wire is coupled and connected with the fourth unit.

[0013] The first wire and the second wire both extend along the second direction, and the first wire and the second wire form a parallel double-line structure.

[0014] Optionally, the first feed network comprises a first input port, the first input port is connected with the first wire, and the first input port is connected with the second wire.

[0015] The distance between the two ends of the first wire in the first direction and the first input port is the same, and the distance between the two ends of the second wire in the first direction and the first input port is the same.

[0016] The phase difference between the electrical signal input by the first input port from the first wire and the electrical signal input by the first input port from the second wire is 180°.

[0017] Optionally, the second feed network comprises a third wire and a fourth wire, the third wire and the fourth wire are both located between the first unit and the third unit, the third wire is connected with the first unit, and the third wire is connected with the second unit, the fourth wire is connected with the third unit, and the fourth wire is connected with the fourth unit.

[0018] The third wire and the fourth wire both extend along the first direction, and the third wire and the fourth wire form a parallel double-line structure.

[0019] Optionally, the second feed network comprises a second input port, the second input port is connected with the third wire, and the second input port is connected with the fourth wire.

[0020] The distance between the second input port and the first unit is the same as the distance between the second input port and the second unit.

[0021] The phase difference between the electrical signal input by the second input port from the third wire and the electrical signal input by the second input port from the fourth wire is 180°.

[0022] In a second aspect, the present application further provides a communication device.

[0023] The communication device provided by the present application comprises the directional antenna described in any of the above embodiments.

[0024] It can be understood that the beneficial effects of the above-mentioned second aspect can be referred to the related description in the above-mentioned first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0026] Figure 1 Structure diagram of the directional antenna provided by the embodiments of the present application;

[0027] Figure 2 Structure diagram of the first surface of the directional antenna provided by the embodiments of the present application;

[0028] Figure 3 Structure diagram of the radiation unit of the directional antenna provided by the embodiments of the present application;

[0029] Figure 4 Structure diagram of the second surface of the directional antenna provided by the embodiments of the present application;

[0030] Figure 5 (a) in FIG. 1 is the radiation pattern of the radiation unit in the TM03 resonance mode in the related art;

[0031] Figure 5 (b) in FIG. 1 is the radiation pattern of the radiation unit excited by the second feed network of the directional antenna provided by the embodiments of the present application;

[0032] Figure 6 Scattering parameter (S parameter) diagram of the input signal of the directional antenna provided by the embodiments of the present application;

[0033] Figure 7 Scattering parameter (S parameter) diagram of the input signal of the first feed source of the directional antenna provided by the embodiments of the present application;

[0034] Figure 8 (a) in FIG. 2 is the radiation pattern of the radiation unit in the first feed source input 2.5GHz electric signal provided by the embodiments of the present application;

[0035] Figure 8 (b) in FIG. 2 is the radiation pattern of the radiation unit in the first feed source input 5.5GHz electric signal provided by the embodiments of the present application;

[0036] Figure 9 Scattering parameter (S parameter) diagram of the input signal of the second feed source of the directional antenna provided by the embodiments of the present application;

[0037] Figure 10 Radiation pattern of the radiation unit under the excitation of the second feed source provided by the embodiments of the present application.

[0038] In the drawings:

[0039] 100 directional antenna

[0040] 10 substrate; 11 first surface; 12 second surface

[0041] 20 radiating element; 201 first element; 202 second element; 203 third element; 204 fourth element; 21 first part; 211 first feeding part; 212 second feeding part; 22 second part; 221 through slot; 23 third part; 231 third feeding part; 24 first slot; 25 second slot

[0042] 30 first feeding network; 31 first wire; 32 second wire; 33 first input port

[0043] 40 second feeding network; 41 third wire; 42 fourth wire; 43 second input port

[0044] 50 reflector DETAILED DESCRIPTION

[0045] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0047] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0048] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Thus, features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0049] The following description will be made in conjunction with Figures 1 to 3 The directional antenna 100 provided by the embodiments of the present application is described.

[0050] It should be noted that the first direction in the following is the x direction shown in Figures 1 to 3 the y direction shown in Figures 1 to 3 the z direction shown in Figures 1 to 3 .

[0051] The directional antenna 100 provided by the present application includes a substrate 10, a first feed network 30 and at least one radiation unit 20.

[0052] The substrate 10 includes a first surface 11 and a second surface 12 arranged in parallel and spaced apart.

[0053] As shown in Figure 1 , the thickness of the substrate 10 extends along the third direction z, the first surface 11 extends along the xOy plane shown in Figure 1 , and the second surface 12 extends along the xOy plane shown in Figure 1 , the first surface 11 and the second surface 12 are arranged in parallel and spaced apart along the third direction z.

[0054] The material of the substrate 10 can include one or more materials with low dielectric constant, such as FR4 (epoxy-based glass fiber composite material), RO4003C (glass cloth reinforced, ceramic filled hydrocarbon material), etc.

[0055] As shown in Figure 2 and Figure 4 , the first feed network 30 is arranged on the first surface 11 and is adapted to be connected to the first feed source, the first feed network 30 includes a first input port 33, and the first feed network 30 is connected to the first feed source through the first input port 33, so that the first feed source respectively inputs the first signal and the second signal into the first feed network 30.

[0056] The radiation unit 20 is arranged on any one of the first surface 11 and the second surface 12, and the radiation unit 20 is provided with a first feed portion 211 at the end portion thereof along the first direction x, and the first feed portion 211 is coupled and connected to the first feed network 30.

[0057] As shown in Figure 1 , the first feed network 30 is arranged on the first surface 11 and is adapted to be connected to the first feed source, the first feed network 30 includes a first input port 33, and the first feed network 30 is connected to the first feed source through the first input port 33, so that the first feed source respectively inputs the first signal and the second signal into the first feed network 30.As shown, the radiating element 20 is disposed on the first surface 11, and the radiating element 20 is along the... Figure 1 The patch extending in the xOy plane, the radiating element 20 can generate electromagnetic oscillations and emit electromagnetic waves under the excitation of the first feed grid 30 or the second feed grid 40.

[0058] The radiating unit 20 includes a first part 21, a second part 22 and a third part 23 arranged sequentially along a first direction x, and a first power supply part 211 is provided at the end of the first part 21 away from the second part 22 along the first direction x;

[0059] A first gap 24 is provided between the first part 21 and the second part 22, and the first part 21 and the second part 22 are coupled and connected through the first gap 24;

[0060] A second gap 25 is provided between the second part 22 and the third part 23, and the second part 22 and the third part 23 are coupled and connected through the second gap 25.

[0061] Therefore, as Figure 6 As shown, the first gap 24 and the second gap 25 improve the resonant frequency ratio between the TM03 mode resonance generated by the radiating element 20 under the excitation of the first signal input to the first feed grid 30 and the TM01 mode resonance generated by the radiating element 20 under the excitation of the second signal input to the first feed grid 30. Figure 6 The dashed lines in the diagram represent the S-parameters of the directional antenna 100 when the radiating element 20 is not equipped with the first slot 24 and the second slot 25. Figure 6 The solid line in the diagram represents the S-parameters of the directional antenna 100 provided in this application.

[0062] The first power supply section 211 is located at the end of the first part 21 away from the second part 22 along the first direction x, that is, the first power supply section is located at the end of the radiating unit 20 along the first direction x. The first feed grid 30 is coupled to the first power supply section 211 so as to transmit the first signal and the second signal to one end of the radiating unit 20 along the first direction x through the first feed grid 30.

[0063] The operating frequency band of the first signal is different from that of the second signal. The operating frequencies of the first part 21, the second part 22, and the third part 23 in the first direction x are all the same. The operating frequency of the first part 21 in the first direction x is within the operating frequency band of the first signal, and the operating frequency of the radiation unit 20 in the first direction x is within the operating frequency band of the second signal.

[0064] In some embodiments, the frequency distribution of the first signal input from the first feed source to the first feed grid 30 is in the frequency band of 5 GHz-6 GHz, and the frequency distribution of the second signal input from the first feed source to the first feed grid 30 is in the frequency band of 2.4 GHz-2.5 GHz.

[0065] The dimensions of the first part 21, the second part 22, and the third part 23 in the first direction x are the same, and the dimensions of the first part 21, the second part 22, and the third part 23 in the first direction x are the same as the wavelength corresponding to the center frequency of the first signal. The dimensions of the radiation unit 20 in the first direction x are the same as the wavelength corresponding to the center frequency of the second signal.

[0066] The equivalent current generated in the radiating element 20 by the first signal input to the first feed unit 211 in the first feed grid 30 is as follows: Figure 1 As shown in a, this excites the radiating element 20 to generate TM. 03 Mode resonance.

[0067] The equivalent current generated in the radiating element 20 by the second signal input to the first feed unit 211 in the first feed grid 30 is as follows: Figure 1 As shown in b, this excites the radiating element 20 to generate TM. 01 Mode resonance.

[0068] It should be noted that, Figure 1 The current shown in figure a and Figure 1 The current shown in b can exist in the same radiating unit 20.

[0069] Therefore, generating different resonant modes on the same radiator can cover different frequency bands. Thus, using multiple resonant modes on the same radiator can broaden the communication frequency band, which helps to meet the frequency band requirements of different application scenarios and improve the flexibility and adaptability of the communication system.

[0070] The beneficial effect of the directional antenna 100 provided in this application is that: the first feed section 211 of the radiating element 20 of the directional antenna 100 is connected to the first input port 33 of the first feed grid 30, and both the first signal and the second signal in the first feed grid 30 are input into the radiating element 20 through the first feed section 211, and the radiating element 20 is excited to generate TM by the first signal in the first feed grid 30. 03 Mode resonance, through the second signal excitation radiation unit 20 in the first feed grid 30, generates TM as a whole. 01 Mode resonance, radiating element 20 can simultaneously generate TM 01 Mode resonance and TM 03 Mode resonance to utilize the TM of radiating element 20 01 TM of mode resonance and radiation unit 20 03 The mode resonance enables dual-frequency operation, giving the directional antenna 100 provided in this application the function of dual-frequency communication.

[0071] In some embodiments provided in this application, the second part 22 is provided with a through groove 221, which penetrates the second part 22 along a third direction z. The through groove 221 extends along a first direction x and a second direction y. The third direction z is orthogonal to the first direction x and the third direction z is orthogonal to the second direction y.

[0072] like Figure 3 As shown, the second part 22 is provided with a through slot 221, which penetrates the second part 22 along the third direction z, so that the second part 22 forms a hollow structure, thereby reducing electromagnetic leakage at the edge of the second part 22. This makes the electromagnetic energy more concentrated in the direction of the main lobe when the second part 22 radiates electromagnetic waves, which helps to reduce the sidelobe level and improve the directivity of the antenna.

[0073] In some embodiments, the through slot 221 is a rectangular slot, and the second part 22 is a rectangular patch.

[0074] Therefore, by setting a through slot 221 in the second part 22, the distribution path of the local current in the second part 22 can be changed, so that the equivalent current on the second part 22 is concentrated in the first direction x and the second direction y, thereby reducing unnecessary radiation, such as Figure 5 (a) and Figure 5 As shown in (b), the sidelobes of the directional antenna 100 provided in this application can be reduced by providing a through slot 221 in the second part 22.

[0075] In some embodiments provided in this application, the second part 22 is symmetrical about the first direction x, and the first part 21 and the third part 23 are arranged symmetrically about the second part 22 in the first direction x.

[0076] like Figure 1 and Figure 3 As shown, Part 1, 21; Part 2, 22; and Part 3, 23 all relate to... Figure 1 The components are arranged symmetrically in the xOz plane, and the first part 21 and the third part 23 are about... Figure 1 The beam is arranged symmetrically in the yOz plane so that the beam generated by the electrical signal input to the radiation element 20 by the second feed grid 40 is about Figure 1 The yOz plane is symmetrically arranged.

[0077] In some embodiments provided in this application, the directional antenna 100 further includes a second feed mesh 40, which is disposed on the substrate 10 and adapted to be connected to a second feed source. The second feed source inputs a third signal to the second feed mesh 40, the third signal having the same wavelength as the first signal. A second feed section 212 is provided at the end of the first part 21 along the second direction y, and a third feed section 231 is provided at the end of the third part 23 along the second direction y. The second feed mesh 40 is coupled to the second feed section 212 and the third feed section 231.

[0078] As shown in Figure 1 and Figure 3 The radiation unit 20 is provided with a second feeding part 212 and a third feeding part 231 at the end along the second direction y, the second feeding part 212 is arranged at the end of the first part 21 along the second direction y, the third feeding part 231 is arranged at the end of the third part 23 along the second direction y, and the second feeding part 212 and the third feeding part 231 are arranged in intervals along the first direction x, the second direction y is perpendicular to the first direction x, the second feeding part 212 is connected with the second feeding network 40, and the third feeding part 231 is connected with the second feeding network 40, and the distance between the second feeding part 212 and the third feeding part 231 along the first direction x is the wavelength of the electrical signal in the second feeding network 40.

[0079] The second feeding network 40 is connected with the second feeding part 212 and the third feeding part 231, and the second feeding network 40 is connected with the second feeding part 212 and the third feeding part 231, so as to transmit the third signal of the second feed source to the radiation unit 20 through the second feeding network 40, the third signal of the second feed source is input into the radiation unit 20 from the second feeding part 212 and the third feeding part 231 respectively, and the equivalent current generated by the third signal input into the second feeding part 212 and the third feeding part 231 of the second feeding network 40 in the radiation unit 20 is shown as c in Figure 1 , which can excite the radiation unit 20 to generate TM 10 mode resonance.

[0080] Therefore, by inputting the third signal into the radiation unit 20 through the second feeding network 40 along the second feeding part 212 and the third feeding part 231, the polarization direction of the beam generated by the third signal exciting the radiation unit 20 is perpendicular to the polarization direction of the beam generated by the first signal exciting the radiation unit 20, so as to improve the isolation between the first feeding network 30 and the second feeding network 40.

[0081] In some embodiments provided in the present application, the radiation unit 20 has a plurality of radiation units 20, and the plurality of radiation units 20 includes a first unit 201, a second unit 202, a third unit 203 and a fourth unit 204, the first unit 201 and the second unit 202 are arranged in intervals along the first direction x, and the third unit 203 and the fourth unit 204 are arranged in intervals along the first direction x, the first unit 201 and the third unit 203 are arranged in intervals along the second direction y, and the second unit 202 and the fourth unit 204 are arranged in intervals along the second direction y;

[0082] The first feeding network 30 is connected between the plurality of radiation units 20, and the second feeding network 40 is connected between the plurality of radiation units 20.

[0083] As shown in Figure 2As shown, the first unit 201, the second unit 202, the third unit 203 and the fourth unit 204 have the same structure and are arranged in parallel with each other to form a radiation array, the first feed network 30 is arranged on the first surface 11, the second feed network 40 is arranged on the second surface 12, the first unit 201, the second unit 202, the third unit 203 and the fourth unit 204 are connected with the first feed network 30, and the first unit 201, the second unit 202, the third unit 203 and the fourth unit 204 are connected with the second feed network 40, so as to make full use of the space between the first unit 201, the second unit 202, the third unit 203 and the fourth unit 204, and reduce the crosstalk between the first feed network 30 and the second feed network 40.

[0084] In some embodiments provided in the present application, the first feed network 30 includes a first wire 31 and a second wire 32, one end of the first wire 31 is connected with the first unit 201, the other end of the first wire 31 is connected with the third unit 203, one end of the second wire 32 is connected with the second unit 202, and the other end of the second wire 32 is connected with the fourth unit 204.

[0085] The first wire 31 and the second wire 32 extend along the second direction y, and the first wire 31 and the second wire 32 form a parallel double-line structure.

[0086] As shown in the first embodiment of the present application, Figure 2 the first wire 31 and the second wire 32 extend along the second direction y, one end of the first wire 31 is connected with the first feeding part 211 of the first unit 201, the other end of the first wire 31 is connected with the first feeding part 211 of the third unit 203, one end of the second wire 32 is connected with the first feeding part 211 of the second unit 202, and the other end of the second wire 32 is connected with the first feeding part 211 of the fourth unit 204.

[0087] The first wire 31 and the second wire 32 are symmetrically arranged about the yOz plane, and the distance between the first wire 31 and the second wire 32 is less than or equal to the width dimension of the first wire 31 or the second wire 32 in the first direction x, so that the first wire 31 and the second wire 32 constitute a parallel double-line structure. In this way, the first wire 31 and the second wire 32 constitute a parallel double-line structure, which improves the anti-interference ability of the first feed network 30 and reduces the signal loss in the first feed network 30.

[0088] In some embodiments provided in the present application, the first feed network 30 includes a first input port 33, the first input port 33 is connected with the first wire 31 and the first input port 33 is connected with the second wire 32.

[0089] As shown in the first embodiment of the present application, Figure 2As shown, the first input port 33 is connected with the first feed source, and the electrical signal in the first feed source is input into the first feed network 30 through the first input port 33. The first input port 33 is connected with the first wire 31 and the second wire 32 respectively, so that the electrical signal in the first feed source is conducted into the first unit 201 and the third unit 203 through the first wire 31 respectively, and the electrical signal in the first feed source is conducted into the second unit 202 and the fourth unit 204 through the second wire 32 respectively.

[0090] In some embodiments provided by the present application, as shown in Figure 2 As shown, the distance between the two ends of the first input port 33 and the first wire 31 along the first direction x is the same, and the distance between the two ends of the first input port 33 and the second wire 32 along the first direction x is the same.

[0091] Therefore, the time for the electrical signal in the first feed network 30 to be conducted from the first input port 33 to the first unit 201 is the same as the time for the electrical signal in the first feed network 30 to be conducted from the first input port 33 to the third unit 203, so that the first unit 201 and the third unit 203 radiate in phase under the excitation of the electrical signal in the first feed network 30, so as to improve the gain of the directional antenna 100 provided by the present application.

[0092] The time for the electrical signal in the first feed network 30 to be conducted from the first input port 33 to the second unit 202 is the same as the time for the electrical signal in the first feed network 30 to be conducted from the first input port 33 to the fourth unit 204, so that the second unit 202 and the fourth unit 204 radiate in phase under the excitation of the electrical signal in the first feed network 30, so as to improve the gain of the directional antenna 100 provided by the present application.

[0093] In some embodiments provided by the present application, the phase difference between the electrical signal input into the first wire 31 by the first input port 33 and the electrical signal input into the second wire 32 by the first input port 33 is 180°.

[0094] As shown in Figure 2 As shown, the first input port 33 is located between the first unit 201 and the second unit 202, and the phase difference between the electrical signal conducted to the first unit 201 by the first input port 33 and the electrical signal conducted to the second unit 202 by the first input port 33 is 180°, so that the equivalent current direction of the electrical signal input into the first unit 201 by the first feed source in the first unit 201 is the same as the equivalent current direction of the electrical signal input into the second unit 202 by the first feed source in the second unit 202. Similarly, the equivalent current direction of the electrical signal input into the third unit 203 by the first feed source in the third unit 203 is the same as the equivalent current direction of the electrical signal input into the fourth unit 204 by the first feed source in the fourth unit 204.

[0095] Therefore, under the excitation of the first feed source, the equivalent current directions in the first unit 201, the second unit 202, the third unit 203 and the fourth unit 204 are all the same, the first unit 201, the second unit 202, the third unit 203 and the fourth unit 204 radiate in the same direction under the excitation of the first signal, and the first unit 201, the second unit 202, the third unit 203 and the fourth unit 204 radiate in the same direction under the excitation of the second signal, thereby improving the gain of the directional antenna 100 at the first input port 33.

[0096] In some embodiments provided by the present application, the second feed network 40 includes a third wire 41 and a fourth wire 42, the third wire 41 and the fourth wire 42 are both located between the first unit 201 and the third unit 203, the third wire 41 is connected with the first unit 201, and the third wire 41 is connected with the second unit 202, the fourth wire 42 is connected with the third unit 203, and the fourth wire 42 is connected with the fourth unit 204.

[0097] The third wire 41 and the fourth wire 42 both extend along the first direction x, and the third wire 41 and the fourth wire 42 form a parallel double-line structure.

[0098] As shown in FIGS. 1, 2 and 3, the first unit 201 and the second unit 202 are symmetric about the yOz plane in the coordinate system, and the third unit 203 and the fourth unit 204 are symmetric about the yOz plane in the coordinate system. Figure 1 Figure 2 As shown in FIGS. 1, 2 and 3, the first unit 201 and the second unit 202 are symmetric about the yOz plane in the coordinate system, and the third unit 203 and the fourth unit 204 are symmetric about the yOz plane in the coordinate system. Figure 1 Figure 1 As shown in FIGS. 1, 2 and 3, the first unit 201 and the second unit 202 are symmetric about the yOz plane in the coordinate system, and the third unit 203 and the fourth unit 204 are symmetric about the yOz plane in the coordinate system. Figure 1 The third wire 41 and the fourth wire 42 are symmetrically arranged about the xOz plane, and the distance between the third wire 41 and the fourth wire 42 is less than or equal to the width dimension of the third wire 41 or the fourth wire 42 in the second direction y, so that the third wire 41 and the fourth wire 42 form a parallel double-line structure. Therefore, the anti-interference ability of the second feed network 40 is improved, and the signal loss in the second feed network 40 is reduced.

[0099]

[0100] ​​​In some embodiments provided in the present application, the second feed network 40 comprises a second input port 43, the second input port 43 is connected with the third wire 41 and the second input port 43 is connected with the fourth wire 42.

[0101] As shown in Figure 4 , the second input port 43 is connected with the second feed source, the electrical signal in the second feed source is input into the second feed network 40 through the second input port 43, the second input port 43 is connected with the third wire 41 and the fourth wire 42 respectively, so that the electrical signal in the second feed source is conducted into the first unit 201 and the second unit 202 through the third wire 41 respectively, and the electrical signal in the second feed source is conducted into the third unit 203 and the fourth unit 204 through the fourth wire 42 respectively.

[0102] In some embodiments provided in the present application, the distance between the second input port 43 and the first unit 201 is the same as the distance between the second input port 43 and the second unit 202.

[0103] As shown in Figure 4 , the time for the electrical signal in the second feed network 40 to be conducted from the second input port 43 to the second feeding part 212 of the first unit 201 is the same as the time for the electrical signal in the second feed network 40 to be conducted from the second input port 43 to the second feeding part 212 of the second unit 202, and the time for the electrical signal in the second feed network 40 to be conducted from the second input port 43 to the third feeding part 231 of the first unit 201 is the same as the time for the electrical signal in the second feed network 40 to be conducted from the second input port 43 to the third feeding part 231 of the second unit 202.

[0104] The first unit 201 and the second unit 202 are caused to radiate in phase under the excitation of the electrical signal in the second feed network 40, so as to improve the gain of the directional antenna 100 provided in the present application.

[0105] It can be understood that, since the third wire 41 and the fourth wire 42 are symmetrical about the xOz plane in the Figure 1 , the first unit 201 and the third unit 203 are symmetrical about the xOz plane in the Figure 1 , the second unit 202 and the fourth unit 204 are symmetrical about the xOz plane in the Figure 1 , the third unit 203 and the fourth unit 204 radiate in phase under the excitation of the electrical signal in the second feed network 40, so as to improve the gain of the directional antenna 100 provided in the present application.

[0106] In some embodiments provided in the present application, the phase difference between the electrical signal input into the third wire 41 by the second input port 43 and the electrical signal input into the fourth wire 42 by the second input port 43 is 180°.

[0107] As shown in Figure 4As shown, the second input port 43 is located between the first unit 201 and the third unit 203, and the second input port 43 is located between the second unit 202 and the fourth unit 204, and the phase difference between the electrical signal conducted by the second input port 43 to the first unit 201 and the electrical signal conducted by the second input port 43 to the third unit 203 is 180°.

[0108] Therefore, under the excitation of the second feed source, the equivalent current directions in the first unit 201, the second unit 202, the third unit 203 and the fourth unit 204 are the same, and the first unit 201, the second unit 202, the third unit 203 and the fourth unit 204 radiate in the same direction under the excitation of the third signal, thereby improving the gain of the directional antenna 100 provided by the present application at the second input port 43.

[0109] In some embodiments provided by the present application, the directional antenna 100 further comprises a reflecting plate 50, the reflecting plate 50 is arranged in parallel with the substrate 10 along the third direction z, the first unit 201, the second unit 202, the third unit 203 and the fourth unit 204 are all arranged on the first surface 11, and the reflecting plate 50 is arranged on the second surface 12 away from the first surface 11.

[0110] The communication device provided by the embodiments of the present application is described below.

[0111] The communication device provided by the present application comprises the directional antenna 100 in any of the above embodiments.

[0112] The directional antenna 100 provided by the present application can work in the frequency band of 2.4GHz-2.5GHz and the frequency band of 5GHz-6GHz at the same time, that is, the directional antenna 100 provided by the present application has the function of dual-frequency communication, so that the communication device provided by the present application has the function of dual-frequency communication.

[0113] The above only describes the preferred embodiments of the present application and does not limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A directional antenna, characterized by The directional antenna comprises: a substrate; at least one radiating unit arranged on the substrate, the radiating unit comprising a first part, a second part and a third part arranged in sequence along a first direction, a first gap being arranged between the first part and the second part, the first part and the second part being coupled and connected through the first gap, a second gap being arranged between the second part and the third part, the second part and the third part being coupled and connected through the second gap, the first part being provided with a first feeding part at an end portion thereof away from the second part along the first direction; a first feeding network arranged on the substrate and coupled and connected with the first feeding part, the first feeding network being adapted to be connected with a first feed source, the electrical signal inputted into the first feeding network by the first feed source comprising a first signal and a second signal, the operating frequency band of the first signal being different from the operating frequency band of the second signal, the operating frequency of the first part along the first direction, the operating frequency of the second part along the first direction and the operating frequency of the third part along the first direction being all the same, and the operating frequency of the first part along the first direction being located in the operating frequency band of the first signal, the operating frequency of the radiating unit along the first direction being located in the operating frequency band of the second signal.

2. The directional antenna of claim 1, wherein: The second part is provided with a through slot, the through slot penetrating through the second part along a third direction, the through slot having a length dimension and a width dimension, the length dimension of the through slot extending along the first direction, the width dimension of the through slot extending along a second direction, the third direction being orthogonal to the first direction, and the third direction being orthogonal to the second direction.

3. The directional antenna of claim 2, wherein: The directional antenna further comprises a second feeding network arranged on the substrate and adapted to be connected with a second feed source, the second feed source inputting a third signal into the second feeding network, the third signal having the same wavelength as the first signal, the first part being provided with a second feeding part at an end portion thereof along the second direction, the third part being provided with a third feeding part at an end portion thereof along the second direction, the second feeding network being coupled and connected with the second feeding part, and the second feeding network being coupled and connected with the third feeding part.

4. The directional antenna of claim 3, wherein: The dimension of the first part along the second direction and the dimension of the third part along the second direction are both the wavelength of the third signal.

5. The directional antenna of claim 3, wherein: The radiating unit has a plurality of units, the plurality of units comprising a first unit, a second unit, a third unit and a fourth unit, the first unit and the second unit being arranged at intervals along the first direction, the third unit and the fourth unit being arranged at intervals along the first direction, the first unit and the third unit being arranged at intervals along the second direction, and the second unit and the fourth unit being arranged at intervals along the second direction; the first feeding network being connected between the first unit, the second unit, the third unit and the fourth unit, and the second feeding network being connected between the first unit, the second unit, the third unit and the fourth unit.

6. The directional antenna of claim 5, wherein: The first feeder network comprises a first wire and a second wire, one end of the first wire is connected with the first unit, the other end of the first wire is connected with the third unit, one end of the second wire is connected with the second unit, the other end of the second wire is connected with the fourth unit; The first wire and the second wire extend along the second direction, and the first wire and the second wire form a parallel double-wire structure.

7. The directional antenna of claim 6, wherein: The first feeder network comprises a first input port, the first input port is connected with the first wire and the first input port is connected with the second wire; The distance between the two ends of the first wire in the first direction and the first input port is the same, and the distance between the two ends of the second wire in the first direction and the first input port is the same; And / or, the phase difference between the electrical signal inputted by the first input port from the first wire and the electrical signal inputted by the first input port from the second wire is 180°.

8. The directional antenna of claim 5, wherein: The second feeder network comprises a third wire and a fourth wire, the third wire and the fourth wire are located between the first unit and the third unit, the third wire is connected with the first unit and the second unit, the fourth wire is connected with the third unit and the fourth unit; The third wire and the fourth wire extend along the first direction, and the third wire and the fourth wire form a parallel double-wire structure.

9. The directional antenna of claim 8, wherein: The second feeder network comprises a second input port, the second input port is connected with the third wire and the second input port is connected with the fourth wire; The distance between the second input port and the first unit is the same as the distance between the second input port and the second unit; And / or, the phase difference between the electrical signal inputted by the second input port from the third wire and the electrical signal inputted by the second input port from the fourth wire is 180°.

10. A communication device, characterized by: The directional antenna comprises the directional antenna as claimed in any one of claims 1-9. The directional antenna comprises the directional antenna as claimed in any one of claims 1-9.

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