Dual-frequency high-gain dipole antenna and communication equipment

Abstract

The embodiment of the invention relates to the technical field of antennas, in particular to a dual-frequency high-gain dipole antenna and communication equipment. Comprising a long-strip-shaped substrate, symmetrical double-frequency radiation units are arranged on the two sides of a long-edge center line of the substrate, each double-frequency radiation unit comprises two parallel oscillators which are symmetrical along a short-edge center line of the substrate, each oscillator comprises a first branch knot and a second branch knot, the first branch knot is located on the first surface of the substrate, and the second branch knot is located on the second surface of the substrate. The first branch knot and the second branch knot are of coupling structures; the symmetrical double-frequency radiation unit is provided with a feeding point at the connection part of the intersection point of the long-side center line and the short-side center line, and the first branch knot is connected with the feeding point. According to the embodiment of the invention, dual-band coverage is realized by using the coupling structure, high gain can be provided at a higher band, and the problem that the gain of the high band is difficult to improve in the prior art is solved.

Description

Technical Field

[0001] The embodiments of this specification relate to the field of antenna technology, and in particular to a dual-frequency high-gain dipole antenna and communication equipment. Background Art

[0002] The Internet of Everything (IoT) is the future of wireless communication. 5G, which is well known in the field, is a very important part of mobile communications, but Wi-Fi has always played a very important role in indoor distribution coverage and other scenarios. For a long time in the future, 5G and Wi-Fi 6 will go hand in hand and complement each other.

[0003] However, both Wi-Fi 6 and 5G will use technologies such as OFDMA and MU-MIMO in sub-6G to improve efficiency and network capacity. In order to combat the spatial loss caused by higher frequencies or weak wall penetration, a higher-gain omnidirectional antenna is needed to achieve better interconnection. At the same time, the original lower frequency band design also needs to be taken into account.

[0004] There is an urgent need for a dual-band high-gain dipole antenna that can provide high gain in a higher frequency band and solve the problem in the prior art that it is difficult to increase the gain in a high frequency band within a wider bandwidth. Summary of the invention

[0005] To solve the problems in the prior art, the embodiments of this specification provide a dual-frequency high-gain dipole antenna and communication equipment, which utilize a coupling structure to achieve dual-band coverage and can provide high gain in higher frequency bands, solving the problem in the prior art that it is difficult to increase the gain of high frequency bands within a wider bandwidth.

[0006] In order to solve the above technical problems, the specific technical solutions of the embodiments of this specification are as follows:

[0007] On the one hand, an embodiment of the present specification provides a dual-frequency high-gain dipole antenna, comprising:

[0008] A strip-shaped substrate, wherein symmetrical dual-frequency radiation units are provided on both sides of a midline of a long side of the substrate, wherein the dual-frequency radiation unit comprises two parallel vibrators symmetrically connected along a midline of a short side of the substrate, wherein the vibrator comprises a first branch and a second branch, wherein the first branch is located on a first surface of the substrate, and the second branch is located on a second surface of the substrate, and the first branch and the second branch are a coupling structure;

[0009] The symmetrical dual-frequency radiation unit is provided with a feeding point at the connection point of the intersection of the long side midline and the short side midline, and the first branch is connected to the feeding point.

[0010] Furthermore, the shapes of the first branch and the second branch are both L-shaped, the long side of the L-shaped first branch is coupled with the long side of the L-shaped second branch, and the short side of the L-shaped first branch is orthogonal to the long side of the L-shaped second branch.

[0011] Furthermore, the width of the long sides of the first and second L-shaped branches is greater than the width of the short sides.

[0012] Furthermore, two pairs of four first branches of the symmetrical dual-frequency radiation units form a parallel design of a pair of parallel low-frequency half-wavelength dipole antennas for transmitting low-frequency signals.

[0013] Furthermore, the first branches and second branches of two pairs of four oscillators in the symmetrical dual-frequency radiation unit are coupled to form a parallel design of a pair of parallel high-frequency radiation units for transmitting high-frequency signals.

[0014] Furthermore, the length of the short side of the first L-shaped branch is set according to a preset low-frequency operating frequency point.

[0015] Further, the first branch of the first dual-frequency radiation unit in the symmetrical dual-frequency radiation unit is located on the first surface, and the second branch of the first dual-frequency radiation unit is located on the second surface;

[0016] The first branch of the second dual-frequency radiation unit in the symmetrical dual-frequency radiation unit is located on the second surface, and the second branch of the second dual-frequency radiation unit is located on the first surface.

[0017] Furthermore, a through hole is provided at a position on the substrate corresponding to the feeding point, for placing a coaxial line for exciting the dual-frequency high-gain dipole antenna;

[0018] The feeding point of the first dual-frequency radiation unit is used for welding the first core of the coaxial line located on the first surface;

[0019] The feeding point of the second dual-frequency radiation unit is used for welding the second core of the coaxial line passing through the through hole to the second surface.

[0020] Furthermore, the dual-frequency radiation unit further includes a third branch located on the midline of the short side, and a first end of the third branch is connected to the feeding point;

[0021] The third branch is used to adjust the matching of high frequency and low frequency.

[0022] On the other hand, an embodiment of the present specification further provides a communication device, including a processor and the dual-frequency high-gain dipole antenna described above.

[0023] The dual-band high-gain dipole antenna of the embodiment of the present specification can transmit low-frequency signals and high-frequency signals. Compared with the direct connection method of the two branches of the vibrator in the traditional Franklin antenna, the first branch and the second branch of the vibrator in the dual-band high-gain dipole antenna of the embodiment of the present specification are respectively deployed on the first surface and the second surface of the substrate, abandoning the method of folding and directly connecting the two branches. While transferring the energy of the first branch to the second branch placed in the opposite direction through coupling, an opposite phase is provided, so that the current of the second branch is the same as that of the first branch, increasing the radiation aperture of the forward superposition, thereby improving the gain, and solving the problem in the prior art that it is difficult to improve the high-frequency band gain within a wider bandwidth. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 The figure shows a schematic diagram of the principle of the Franklin antenna in the embodiment of this specification;

[0026] Figure 2 The figure shows a schematic diagram of the mechanism of a classic parallel half-wave dipole antenna in an embodiment of this specification;

[0027] Figure 3 The figure shows a schematic diagram of the structure of a dual-frequency high-gain dipole antenna in an embodiment of this specification;

[0028] Figure 4 The figure shows a schematic diagram of the coupling structure of the first branch and the second branch in the embodiment of this specification;

[0029] Figure 5 Shown is a schematic diagram of a half-wavelength dipole antenna in an embodiment of this specification;

[0030] Figure 6 Shown is a schematic diagram of a high frequency radiation unit in an embodiment of this specification;

[0031] Figure 7 The figure shows the L-shaped structure schematic diagram of the second branch of the first branch in the embodiment of this specification;

[0032] Figure 8 The figure shows a schematic diagram of the structure of a dual-frequency high-gain dipole antenna including a third branch in an embodiment of the present specification;

[0033] Fig. 9The figure shows a schematic diagram of the current direction of the dual-frequency high-gain dipole antenna in the embodiment of this specification;

[0034] Fig.10 The figure shows the dual-frequency performance simulation results of the dual-frequency high-gain dipole antenna of the embodiment of this specification;

[0035] Fig.11a Shown is the H-plane radiation pattern in the simulation result of the dual-frequency high-gain dipole antenna in the embodiment of this specification;

[0036] Fig.11b Shown is the E-plane radiation pattern in the simulation result of the dual-frequency high-gain dipole antenna in the embodiment of this specification;

[0037] Figure 12a-Figure 12c Shown are schematic diagrams of the structures of the first branch and the second branch in other embodiments of the present specification;

[0038] Fig.13 Shown are the simulation results of the out-of-roundness of the second branch at different distances in the embodiment of this specification.

[0039]

Description of the accompanying drawings

[0040] 1. Substrate;

[0041] 2. Dual-frequency radiation unit;

[0042] 3. Vibrator;

[0043] 31. The first branch;

[0044] 32. The second branch;

[0045] 33. Coupling structure;

[0046] 4. Feeding point;

[0047] 5. A pair of low-frequency half-wavelength dipole antennas in parallel;

[0048] 6. High frequency radiation unit;

[0049] 7. The third branch. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this specification.

[0051] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present specification described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, device, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0052] It should be noted that the acquisition, storage, use, and processing of data in the technical solution of this application are in compliance with the relevant provisions of national laws and regulations.

[0053] The dipole antenna is a very classic omnidirectional antenna structure. The most commonly used half-wave dipole antenna obtains an "8"-shaped omnidirectional coverage. If the length is increased, the beam of the dipole antenna will split into multiple ones. The reason is that the overly long structure will inevitably have a reverse current, so there will be radiation zero points in some directions. Therefore, the Franklin antenna structure is used in the prior art to suppress the radiation of the reverse current and improve the antenna gain. The principle is as follows: Figure 1 As shown, the reverse current portion is folded in half and arranged, so the radiation of the reverse portion will be offset by the folded structure, while the forward portion will be superimposed to increase the gain.

[0054] According to antenna theory, the impedance of a half-wave dipole antenna is about 73Ω, so in actual use, a pair of oscillators are usually connected in parallel to obtain better matching. Figure 2 The classic dipole Wi-Fi antenna based on printed circuit board technology is shown in the figure, including a dielectric substrate, a vibrator and a feed point. According to theory, without adding any other structure, the gain of such a design is usually 2.15dB. Therefore, the gain of the traditional half-wave dipole antenna is not high. But both Wi-Fi 6 and 5G will use technologies such as OFDMA and MU-MIMO in sub-6G to improve efficiency and network capacity respectively. In order to combat the spatial loss caused by higher frequencies, or the weak wall penetration ability, a higher gain omnidirectional antenna is needed to achieve better mutual connection. At the same time, it is also necessary to take into account the original lower frequency band design, so a dual-band omnidirectional antenna that can provide high gain in higher frequency bands is very necessary.

[0055] In order to solve the problem that it is difficult to improve the gain in high frequency bands in the prior art, an embodiment of this specification provides a dual-band high-gain dipole antenna, which uses a coupling structure to achieve dual-band coverage and can provide high gain in higher frequency bands. Figure 3 The figure shows the front and back structure diagram of a dual-frequency high-gain dipole antenna according to an embodiment of the present specification. Figure 3 As shown, the dual-frequency high-gain dipole antenna includes a long strip substrate 1, and symmetrical dual-frequency radiation units 2 are provided on both sides of the midline of the long side of the substrate. The dual-frequency radiation unit 2 includes two parallel vibrators 3 symmetrically connected along the midline of the short side of the substrate. The vibrator 3 includes a first branch 31 and a second branch 32. The first branch 31 is located on the first surface of the substrate 1, and the second branch 32 is located on the second surface of the substrate 1. Figure 3 The figure shows a schematic diagram of the structure of a dual-frequency high-gain dipole antenna in an embodiment of the present specification, in which a first branch 31 and a second branch 33 are coupled together via a coupling structure 33 .

[0056] The symmetrical dual-frequency radiation unit 2 is provided with a feeding point at the intersection of the long side midline and the short side midline, and the first branch 31 is connected to the feeding point.

[0057] The dual-frequency radiating unit 2 of the dual-frequency high-gain dipole antenna in the embodiment of the present specification is symmetrical about the midline of the long side, and each dual-frequency radiating unit 2 includes a vibrator 3 symmetrical about the midline of the short side. Therefore, the dual-frequency high-gain dipole antenna in the embodiment of the present specification includes a total of two dual-frequency radiating units 2, and the dual-frequency high-gain dipole antenna includes a total of four vibrators 3, that is, two groups of vibrators 3, each dual-frequency radiating unit 2 has a group of vibrators 3, and each vibrator 3 includes a first branch 31 and a second branch 32 connected by a coupling structure 33.

[0058] like Figure 3 and Figure 4 As shown, the structure of the dual-frequency radiation unit 2 on the long side center dividing line is a classic parallel double-line structure. By adjusting the distance between the parallel double lines, the impedance can be adjusted to obtain better matching.

[0059] When using the dual-frequency high-gain dipole antenna in the embodiment of this specification, the inner core and outer core of the coaxial line are respectively welded to the first branches 31 of the two dual-frequency radiation units 2 at the feeding point. After the coaxial line is connected, the current direction can be as follows: Fig. 9 As shown, Fig. 9 The direction of the "solid arrow" in the figure is the direction of the current. The dotted box is a classic double parallel line structure. The currents on the parallel double lines are opposite, and the current directions of the two oscillators are the same, thus first realizing the classic half-wave dipole antenna.

[0060] In addition, the dual-band high-gain dipole antenna of the embodiment of the present specification can also transmit high-frequency signals through the vibrator composed of the first branch and the second branch. Compared with the direct connection method of the two branches of the vibrator in the traditional Franklin antenna, the first branch and the second branch of the vibrator in the dual-band high-gain dipole antenna of the embodiment of the present specification are respectively deployed on the first surface and the second surface of the substrate, abandoning the direct connection method of the two branches folded together. While transferring the energy of the first branch to the second branch placed in the opposite direction through coupling, the opposite phase is provided, so that the current of the second branch is the same as that of the first branch, increasing the radiation aperture of the forward superposition, thereby improving the gain, and solving the problem in the prior art that it is difficult to improve the high-frequency band gain within a wider bandwidth.

[0061] According to one embodiment of the present specification, in order to control the effect of coupling, such as Figure 4 and Figure 7 As shown, the long side of the L-shaped first branch 31 is coupled with the long side of the L-shaped second branch 32, and the short side of the L-shaped first branch 31 is orthogonal to the long side of the L-shaped second branch 32. Figure 4 As shown, the main coupling parts are the long side of the L-shaped first branch 31 and the long side of the L-shaped second branch 32, that is, Figure 4 The "solid arrow" in the figure is partially coupled, and the short side of the L-shape is mainly orthogonal to the current direction, that is, Figure 4 The coupling energy of the "dotted arrow" part can be ignored. The coupling can be controlled by designing the length of the coupling structure to obtain better antenna performance.

[0062] Therefore, the structures that the first branch 31 and the second branch 32 need to satisfy are as follows:

[0063] (1) Figure 4 The length of the "solid arrow" affects the coupling and needs to be of sufficient length;

[0064] (2) The length of the L-shaped whole of the second branch affects the working low frequency band, and its length is half the wavelength of the working frequency band;

[0065] (3) The distance between the short side of the first branch 31 and the short side of the second branch 32 is used to adjust the overall length, and the overall length of the first branch 31 and the second branch 32 is 3 / 2 wavelength of the high-frequency working frequency band;

[0066] (4) The short side of the L-shaped first branch 31 is orthogonal to the long side of the L-shaped second branch 32 .

[0067] It should be noted that the structures of the first branch 31 and the second branch 32 that meet the above four points can both implement the technical solution of the present invention. For example Figure 12a-Figure 12c All of them are within the protection scope of this specification.

[0068] In addition, in the embodiments of the present specification, the distance between the two second branches 32 of the dual-frequency radiation unit symmetrical along the short side midline can also be set according to the out-of-roundness performance requirements of the antenna, that is, the distance between the second branches 32 will affect the out-of-roundness performance of the antenna, such as Fig.13 As shown, when the distance of the second branch 32 is far away from the short side midline ( Fig.13 In a), the radiation of the antenna in the X-axis direction will be enhanced, but the radiation in the Y-axis will be weakened, and the out-of-roundness of the antenna will be worsened; when the distance of the second branch 32 is close to the short side midline, such as Fig.13 As shown in c, the omnidirectional radiation will be more uniform.

[0069] It can be understood that the coupling structure 33 can increase the bandwidth of high frequency and high gain, so that it can completely cover the 5G frequency band of Wi-Fi.

[0070] Furthermore, according to one embodiment of the present specification, Figure 7 As shown, the width of the long side of the L-shaped first branch 31 and the second branch 32 is greater than the width of the short side.

[0071] It can be understood that the portion corresponding to the coupling structure 33 adopts a structure with a smaller width to achieve coupling between the upper and lower layers, and the length of the L-shaped bending portion can be used to control the size of the coupling, thereby obtaining a better radiation effect.

[0072] Furthermore, the length of the short side of the L-shaped first branch 31 is set according to a preset low-frequency operating frequency point, such as Figure 7 As shown, adjusting the length of the short side of the L-shaped first branch 31 can modify the low-frequency operating frequency, because the short side of the L-shaped is also a part of the low-frequency resonant length and can be used to modify the low-frequency operating frequency; however, the short side is only a minor part of the high-frequency coupling structure, and modification will not affect the frequency much, so adjusting its length has a greater impact on the low-frequency operating frequency.

[0073] An important design of the dual-frequency high-gain dipole antenna of the embodiment of this specification is to cleverly add a high-frequency design with high-gain characteristics to the low-frequency design, such as Figure 5 As shown, two pairs of four first branches 31 of the symmetrical dual-frequency radiation unit 2 form a parallel design of a pair of parallel low-frequency half-wavelength dipole antennas 5 for transmitting low-frequency signals (2.4 GHz). Figure 6 As shown, the first branches 31 and the second branches 32 of the two pairs of four oscillators in the symmetrical dual-frequency radiation unit 2 constitute a pair of parallel high-frequency radiation units 6, which also constitute a parallel design of two half-wavelength λ dipole antennas for transmitting high-frequency signals (5GHz).

[0074] In the embodiment of this specification, the total length of the two first branches 31 of the two symmetrical dual-frequency radiation units 2 on the same side of the short side midline is related to the low-frequency resonance frequency, which is about 1 / 2 wavelength λ. Figure 7 As shown, the low-frequency resonance frequency can be adjusted by adjusting the length of the short side of the first branch 31 .

[0075] The equivalent lengths of the two vibrators 3 (i.e., the first branch 31 and the second branch 32) on the same side of the short side dividing line of the two symmetrical dual-frequency radiating units 2 are related to the resonant frequency of the high frequency. The total length of the two vibrators on the same side of the short side dividing line is approximately 3 / 2 wavelength. Stretching or shortening the overall length of the two vibrators can adjust the resonant frequency of the high frequency.

[0076] like Figure 6 As shown, an oscillator 3 of a dual-frequency radiation unit 2 can be decomposed into three parts, namely two parts contributing to radiation and a part not contributing to radiation. The length of each part is related to the resonant frequency, and the equivalent length is about 1 / 4 wavelength.

[0077] According to an embodiment of the present specification, in order to improve the uniformity of omnidirectional radiation performance, as Figure 2 As shown, the symmetrical dual-frequency radiation units 2 are respectively arranged on the first surface and the second surface of the substrate.

[0078] Further, the first branch of the first dual-frequency radiation unit in the symmetrical dual-frequency radiation unit is located on the first surface, and the second branch of the first dual-frequency radiation unit is located on the second surface;

[0079] The first branch of the second dual-frequency radiation unit in the symmetrical dual-frequency radiation unit is located on the second surface, and the second branch of the second dual-frequency radiation unit is located on the first surface.

[0080] For example, Figure 2 As shown, the first dual-frequency radiation unit in the symmetrical dual-frequency radiation unit 2 is a dual-frequency radiation unit below the long side midline, the first branch 31 of the first dual-frequency radiation unit is located on the first surface, and the second branch 32 is located on the second surface. The second dual-frequency radiation unit in the symmetrical dual-frequency radiation unit 2 is a dual-frequency radiation unit above the long side midline, the first branch 31 of the second dual-frequency radiation unit is located on the second surface, and the second branch 32 is located on the first surface.

[0081] It can be understood that the same structure on both sides of the long side dividing line is designed on the front and back sides of the substrate. Under this design, the current will be more evenly distributed on the front and back sides of the substrate, so the omnidirectional radiation performance will be more uniform.

[0082] Further, in order to facilitate welding of the coaxial line, according to an embodiment of the present specification, a through hole is provided on the substrate 1 at a position corresponding to the feeding point 4, for placing the coaxial line for exciting the dual-frequency high-gain dipole antenna;

[0083] The feeding point 4 of the first dual-frequency radiation unit is used for welding the first core of the coaxial line located on the first surface;

[0084] The feeding point 4 of the second dual-frequency radiation unit is used for welding the second core of the coaxial line passing through the through hole to the second surface.

[0085] Through the through-hole design, you only need to weld the first core of the coaxial line to the feeding point of the dual-frequency radiation unit 2 on the same side of the coaxial line, and pass the second core of the coaxial line through the through-hole and weld it to the feeding point of the dual-frequency radiation unit 2 on the other side of the coaxial line.

[0086] According to one embodiment of this specification, Figure 8 As shown, the dual-frequency radiation unit 2 further includes a third branch 7, which is located on the midline of the short side, and the first end of the third branch is connected to the feeding point;

[0087] The third branch 7 is used to adjust the matching of high frequency and low frequency.

[0088] In the embodiments of this specification, because it is necessary to take dual-frequency design into consideration at the same time, a third branch 7 is added at the feeding point of the dual-frequency radiating unit 2, and the total length of the third branch 7 of the two dual-frequency radiating units is adjusted, so that a high-frequency design can be achieved while obtaining a good match with a low frequency. Moreover, the third branch 7 is relatively short, and the length of the third branch 7 is much smaller than the radiating branch. Therefore, the radiation pattern of the structure will not appear in the two existing frequency bands, but its structure will be equivalent to different impedances in the two frequency bands; the same feeding structure is usually difficult to achieve a good match in a wide range; the branches added here are in parallel with the radiating branches, and their equivalent impedances at different frequencies can help the antenna achieve high and low frequency matching at the same time. The principle is: branch loading, and using the difference in the equivalence of branches at different frequencies to obtain a better match at the same time.

[0089] On the other hand, an embodiment of the present specification further provides a communication device, including a processor and the dual-frequency high-gain dipole antenna described in the embodiment of the present specification.

[0090] In the embodiments of this specification, the dual-frequency high-gain dipole antenna described in the embodiments of this specification can be mass-produced using a printed circuit board process. The dual-frequency high-gain dipole antenna of the embodiments of this specification can be used in Wi-Fi 6 or Internet of Everything (IoT) scenarios. The dual-frequency high-gain dipole antenna has the characteristics of dual-frequency, high gain and small size. The supported frequencies are 2.45 GHz and 5.15-5.85 GHz; at the same time, in the high frequency band, the dual-frequency high-gain dipole antenna can provide a gain of about 2dB higher than that of a single antenna unit.

[0091] The lower 2.45GHz frequency band is well compatible with current products. Its size and installation method have not changed, and it is fully compatible with existing platforms. On this basis, the dual-band high-gain dipole antenna also provides a high-frequency working band with high gain, which can be used to overcome the high attenuation of high-frequency signals in space; and it can be well arrayed with the same or similar devices to implement the hardware platform of MU-MIMO proposed by Wi-Fi6 or MIMO in 5G communication.

[0092] Fig.10 The figure shows the dual-frequency performance simulation results of the dual-frequency high-gain dipole antenna of the embodiment of this specification. The horizontal axis represents the frequency, and the vertical axis represents the return loss. The return loss is how much energy is radiated at this frequency of the antenna. The lower the better, usually defined as -10dB; below 6GHz, it is basically equal to the efficiency of the antenna. Fig.10 It can be seen that the dual-band high-gain dipole antenna of the embodiment of this specification can radiate / work efficiently in the two frequency bands of 2.45 GHz and 5.15-5.85 GHz, and can cover the two working frequency bands of Wi-Fi.

[0093] Fig.11a Shown is the H-plane radiation pattern in the simulation result of the dual-frequency high-gain dipole antenna in the embodiment of this specification; Fig.11b Shown is the E-plane radiation pattern in the simulation results of the dual-band high-gain dipole antenna in the embodiment of this specification; at low frequencies, the design is a classic omnidirectional distribution, the gain range is 2.0dB~2.3dB, and the omnidirectional uniformity is excellent; at high frequencies, the design is also omnidirectional, and the gain ranges at three frequencies are 3.0~4.4dB@5.15GHz, 3.3~4.6dB@5.5GHz, and 3.1~4.4dB@5.85GHz, respectively. Compared with the classic half-wave dipole gain, the maximum increase is about 2dB, and the omnidirectional uniformity is good, and the non-circularity is less than 1.5dB.

[0094] It should be understood that in the various embodiments of this specification, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this specification.

[0095] It should also be understood that in the embodiments of this specification, the term "and / or" is only a description of the association relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the embodiments of this specification generally indicates that the associated objects before and after are in an "or" relationship.

[0096] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed in the embodiments of this specification can be implemented with electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this specification.

[0097] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0098] In the several embodiments provided in this specification, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or it can be an electrical, mechanical or other form of connection.

[0099] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of this specification.

[0100] In addition, each functional unit in each embodiment of this specification may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0101] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this specification is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of this specification. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0102] Specific embodiments are used in this specification to illustrate the principles and implementation methods of this specification. The description of the above embodiments is only used to help understand the methods and core ideas of this specification. At the same time, for those skilled in the art, according to the ideas of this specification, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on this specification.

Claims

1. A dual-frequency high-gain dipole antenna, characterized in that: include: A strip-shaped substrate, wherein symmetrical dual-frequency radiation units are provided on both sides of a midline of a long side of the substrate, wherein the dual-frequency radiation unit comprises two parallel vibrators symmetrically connected along a midline of a short side of the substrate, wherein the vibrator comprises a first branch and a second branch, wherein the first branch is located on a first surface of the substrate, and the second branch is located on a second surface of the substrate, and the first branch and the second branch are a coupling structure; The symmetrical dual-frequency radiation unit is provided with a feeding point at the connection point of the intersection of the long side midline and the short side midline, and the first branch is connected to the feeding point.

2. The dual-frequency high-gain dipole antenna according to claim 1, characterized in that: The first branch and the second branch are both L-shaped, the long side of the L-shaped first branch is coupled with the long side of the L-shaped second branch, and the short side of the L-shaped first branch is orthogonal to the long side of the L-shaped second branch.

3. The dual-frequency high-gain dipole antenna according to claim 2, characterized in that: The width of the long sides of the first and second L-shaped branches is greater than the width of the short sides.

4. The dual-frequency high-gain dipole antenna according to claim 2, characterized in that: The length of the short side of the first L-shaped branch is set according to a preset low-frequency operating frequency point.

5. The dual-frequency high-gain dipole antenna according to claim 2, characterized in that: Two pairs of symmetrical dual-frequency radiation units, with a total of four first branches, form a parallel design of a pair of parallel low-frequency half-wavelength dipole antennas for transmitting low-frequency signals.

6. The dual-frequency high-gain dipole antenna according to claim 2, characterized in that: The first branches of two pairs of four oscillators in the symmetrical dual-frequency radiation unit are coupled with the second branches to form a parallel design of a pair of parallel high-frequency radiation units for transmitting high-frequency signals.

7. The dual-frequency high-gain dipole antenna according to claim 1, characterized in that: The first branch of the first dual-frequency radiation unit in the symmetrical dual-frequency radiation units is located on the first surface, and the second branch of the first dual-frequency radiation unit is located on the second surface; The first branch of the second dual-frequency radiation unit in the symmetrical dual-frequency radiation unit is located on the second surface, and the second branch of the second dual-frequency radiation unit is located on the first surface.

8. The dual-frequency high-gain dipole antenna according to claim 7, characterized in that: A through hole is provided at a position on the substrate corresponding to the feeding point, for placing a coaxial line for exciting the dual-frequency high-gain dipole antenna; The feeding point of the first dual-frequency radiation unit is used for welding the first core of the coaxial line located on the first surface; The feeding point of the second dual-frequency radiation unit is used for welding the second core of the coaxial line passing through the through hole to the second surface.

9. The dual-frequency high-gain dipole antenna according to claim 1, characterized in that: The dual-frequency radiation unit further includes a third branch located on the short side midline, and a first end of the third branch is connected to the feeding point; The third branch is used to adjust the matching of high frequency and low frequency.

10. A communication device, characterized in that: It comprises a processor and the dual-frequency high-gain dipole antenna as described in any one of claims 1 to 9.

Images