Large frequency ratio dual-frequency antenna and wireless communication equipment

Abstract

The present invention discloses a high frequency ratio dual-frequency antenna and wireless communication equipment, the high frequency ratio dual-frequency antenna comprising: a metal floor, a gap is formed on the metal floor; a radiation patch is arranged at intervals from the metal floor; a rectangular waveguide is fixed on the metal floor and corresponds to the position of the gap; a microstrip line is sandwiched between the metal floor and the radiation patch and is arranged at intervals from the radiation patch; a first coaxial feeding probe is connected to the rectangular waveguide; a second coaxial feeding probe passes through the metal floor and is electrically connected to the microstrip line. The high frequency ratio dual-frequency antenna of the present invention can work in the microwave frequency band and the millimeter wave frequency band at the same time, which is conducive to alleviating the pressure of frequency band congestion and is easy to integrate.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a large frequency ratio dual-frequency antenna and wireless communication equipment. Background Art

[0002] With the development of science and technology, the system's demand for channel capacity has increased, and the commonly used microwave frequency bands have become increasingly crowded, gradually failing to meet the communication needs of users in the fifth generation mobile communication (5G) era. At present, most communication equipment works in the microwave frequency band, so the spectrum resources available in the millimeter wave frequency band are very rich. Therefore, designing a large frequency ratio dual-frequency antenna that works in the microwave and millimeter wave frequency bands at the same time to meet the needs of two or more bands can solve the problem well. Summary of the invention

[0003] The main purpose of the present invention is to propose a large frequency ratio dual-frequency antenna and wireless communication equipment, aiming to enable the antenna to work simultaneously in the microwave frequency band and the millimeter wave frequency band to alleviate the pressure of frequency band congestion.

[0004] To achieve the above object, the present invention proposes a high frequency ratio dual-frequency antenna, the high frequency ratio dual-frequency antenna comprising:

[0005] A metal floor, wherein a gap is formed on the metal floor;

[0006] A radiation patch is spaced apart from the metal floor;

[0007] A rectangular waveguide is fixed on the metal floor and corresponds to the position of the slot;

[0008] A microstrip line is sandwiched between the metal floor and the radiation patch and is spaced apart from the radiation patch;

[0009] A first coaxial feeding probe connected to the rectangular waveguide;

[0010] The second coaxial feeding probe passes through the metal floor and is electrically connected to the microstrip line.

[0011] Optionally, the high frequency ratio dual-frequency antenna further includes:

[0012] A circular dielectric substrate, wherein the radiation patch is arranged on a surface of one side of the circular dielectric substrate away from the metal floor.

[0013] Optionally, the radiation patch is arranged in a mesh shape on the circular dielectric substrate to form a partial reflection surface structure.

[0014] Optionally, the inner cavity cross-sectional dimensions of the rectangular waveguide are the same as the rectangular aperture of the metal plate.

[0015] Optionally, a through hole is formed on a side wall of the rectangular waveguide at one end away from the metal floor, and the first coaxial feeding probe passes through the through hole and extends into the rectangular waveguide.

[0016] Optionally, the high frequency ratio dual-frequency antenna further includes:

[0017] A thin dielectric plate, on which the microstrip line is arranged.

[0018] Optionally, the thin dielectric plate is fixed on the metal floor; or, the second coaxial feeding probe is fixed on the metal floor via a fixed connector, and the thin dielectric plate is fixed on the second coaxial feeding probe and spaced apart from the metal floor.

[0019] Optionally, the high frequency ratio dual-frequency antenna is further provided with:

[0020] A support column, one end of which is fixed on the metal floor, and the other end of which is used to be fixed on the radiation patch.

[0021] Optionally, the second coaxial feeding probe and the microstrip line are arranged in an L shape;

[0022] And / or, the rectangular waveguide is fixed on the metal floor via a fixing member.

[0023] The present invention also provides a wireless communication device, which includes the high frequency ratio dual-frequency antenna as described above.

[0024] The present invention sets two coaxial probes, the second coaxial feeding probe of the low-frequency part passes through the metal floor and is connected to the microstrip line, and the first coaxial feeding probe of the high-frequency part is connected to the metal waveguide. One of the two coaxial probes is connected to the feeding and output to the microstrip line respectively, so that the microstrip line excites the radiation patch, and transmits to the rectangular waveguide through the feeding probe to excite the two antenna parts respectively, thereby realizing the radiation of the microwave and millimeter wave frequency bands. The diameter and position of the probe can also affect the impedance matching of the antenna, thereby adjusting the bandwidth of the antenna. The large frequency ratio dual-frequency antenna of the present invention can work in the microwave frequency band and the millimeter wave frequency band at the same time, which is conducive to alleviating the pressure of band congestion and is easy to integrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention 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 the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1It is a structural perspective view of a large frequency ratio dual-frequency antenna of the present invention, which is a large frequency ratio dual-frequency antenna of an embodiment;

[0027] Figure 2 It is a side view of an embodiment of a high frequency ratio dual-frequency antenna of the present invention;

[0028] Figure 3 A top view of an embodiment of a high frequency ratio dual-frequency antenna of the present invention;

[0029] Figure 4 It is a schematic diagram of the dimensions of a side view of an embodiment of a high frequency ratio dual-frequency antenna of the present invention;

[0030] Figure 5 It is a schematic diagram of dimension marking of a top view of an embodiment of a high frequency ratio dual-frequency antenna of the present invention;

[0031] Figure 6 A schematic diagram showing how the reflection coefficient of an embodiment of a high frequency ratio dual-frequency antenna of the present invention varies with frequency;

[0032] Figure 7 It is a normalized radiation pattern of the maximum radiation direction of two-port simulation of an embodiment of the high frequency ratio dual-frequency antenna of the present invention at 3.5 GHz;

[0033] Figure 8 This is the normalized radiation pattern of the maximum radiation direction of two-port simulation of an embodiment of the high frequency ratio dual-frequency antenna of the present invention at 28 GHz.

[0034] Description of Figure Numbers:

[0035] Label name Label name 10 Metal Floor 60 Second coaxial feed probe 20 Radiation patch 70 Circular dielectric substrate 30 Rectangular waveguide 80 Thin dielectric plate 40 Microstrip Line 90 Support column 50 First coaxial feed probe 11 Rectangular aperture

[0036] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0041] The present invention provides a large frequency ratio dual-frequency antenna.

[0042] With the development of science and technology, the system's demand for channel capacity has increased, and the commonly used microwave frequency bands have become increasingly crowded, gradually failing to meet the communication needs of users in the fifth generation mobile communication (5G) era. The 5G spectrum can be divided into two areas: one is the basic coverage band, which is from 450MHz to 6GHz, called sub 6G; the other area is the capacity supplement band, which is from 24GHz to 52GHz; currently most communication equipment is concentrated in the microwave band, so the spectrum resources available in the millimeter wave band are very rich. In addition, millimeter wave communication technology is a high-quality, constant parameter and mature wireless transmission communication technology, and the 5G mobile communication system is a wide coverage, high capacity, multi-connection, low latency and high reliability network. The full application of millimeter wave technology in the 5G communication system can greatly alleviate the current pressure of tight frequency band resources. After that, with the further development of millimeter wave technology, more designs can work on the millimeter wave band, which to a certain extent alleviates the pressure on the communication spectrum. The millimeter wave band has rich spectrum resources and can achieve high-speed wireless communication, which can effectively improve spectrum efficiency and transmission quality. At the same time, since the working wavelength of the millimeter wave antenna is very short, the designed antenna usually has the advantages of small size and easy integration. Therefore, it plays an important role in the new generation of wireless local area networks (WiGig) and 5G mobile communications. In addition, since the microwave frequency band is still widely used in communication systems, the corresponding low-frequency band still needs to be utilized. At this time, an antenna that can work in both microwave and millimeter wave bands and meet the needs of two or more bands can solve the problem well. Therefore, the concept of a large frequency ratio antenna is proposed. A large frequency ratio antenna usually refers to an antenna with a center frequency ratio of more than 3. Antennas that can work in microwave and millimeter wave bands meet this concept. Therefore, a large frequency ratio multi-frequency antenna is designed to take into account both the low frequency bands widely used in 5G applications and the millimeter wave bands that will be put into use on a large scale in the future. Such a design can be widely used in the future wireless communication field.

[0043] Patch antennas can be widely used in base stations, satellite communications and other fields due to their advantages such as easy integration and low profile. Patch antennas can operate in microwave frequency bands, and can introduce new frequency bands by using multi-layer patch structures or loading parasitic elements on patches, adding slots, etc., so that they can operate in multiple frequency bands and occupy a smaller volume. Therefore, patch antennas are very suitable for designing the low-frequency part of antennas; in addition, slot antennas are also simple in structure and can radiate outward by introducing slots on patches or substrates, and can operate in high-frequency bands. However, due to the short wavelength and relatively large spatial loss of millimeter waves, the advantage of low transmission loss of metal waveguides can be used, and metal waveguides can be used to transmit energy. Therefore, patch antennas and slot antennas are very suitable for use in high-frequency dual-band antennas.

[0044] Reference Figures 1 to 3 In one embodiment of the present invention, the high frequency ratio dual-frequency antenna includes:

[0045] A metal floor 10, wherein the metal floor 10 is provided with gaps;

[0046] The radiation patch 20 is spaced apart from the metal floor 10;

[0047] A rectangular waveguide 30 is fixed on the metal floor 10 and corresponds to the position of the gap;

[0048] A microstrip line 40 is sandwiched between the metal floor 10 and the radiation patch 20 and is spaced apart from the radiation patch 20;

[0049] A first coaxial feeding probe 50 connected to the rectangular waveguide 30;

[0050] The second coaxial feeding probe 60 passes through the metal floor 10 and is electrically connected to the microstrip line 40 .

[0051] In this embodiment, the metal floor 10 serves as a grounding portion in the antenna device. The metal floor 10 may be a pure metal floor 10, or a metal floor 10 at least partially made of metal material. The thickness, size and shape of the metal floor 10 may be set according to the actual application product and application environment, etc., to meet different application requirements. In a specific embodiment, the shape of the metal floor 10 may be circular or rectangular, such as a rectangle or a square. The metal floor 10 may have a rectangular aperture in its central area for radiation, coupling energy to the upper partial reflective surface, and through the rectangular aperture, radiation in the high frequency band may be generated.

[0052] The rectangular waveguide 30 is located below the metal floor 10. The rectangular waveguide 30 is made of metal. The rectangular waveguide 30 is mainly used to transmit high-frequency signals. The opening of the rectangular waveguide 30 corresponds to the rectangular aperture. One end of the rectangular waveguide 30 is connected to the upper metal floor 10. In a specific embodiment, the rectangular waveguide 30 can be fixed to the metal floor 10 by a fixing member, such as screws, or fixed to the metal floor 10 by welding or other processes, which is not limited here.

[0053] The other end of the rectangular waveguide 30 is provided with a through hole on its side, which is used to connect with the first coaxial feeding probe 50, and the other end of the first coaxial feeding probe 50 can be connected to the SMA-KFD connector. It can be understood that the height of the first coaxial feeding probe 50 on the rectangular waveguide 30 will affect the impedance matching for high frequencies. In this embodiment, the rectangular waveguide 30 is provided with a through hole on the side wall of one end away from the metal floor 10, so that the first coaxial feeding probe 50 arranged at the bottom of the rectangular waveguide 30 is connected to the rectangular waveguide 30, and the first coaxial feeding probe 50 extends into the rectangular waveguide 30 through the through hole. The first coaxial feeding probe 50 is connected to the rectangular waveguide 30, and the energy is transmitted to the rectangular waveguide 30, and propagates in the rectangular waveguide 30, radiated through the aperture, and high-frequency band radiation is generated. It is arranged in this way so that the first coaxial feeding probe 50 can transmit energy through the rectangular waveguide 30 and radiate outward through the rectangular aperture, thereby generating a high-frequency millimeter wave band. The rectangular waveguide 30 transmits energy to the aperture on the metal floor 10 and radiates it out, and the rectangular waveguide 30 has low conductor loss, no radiation loss, simple structure, and is easy to manufacture. When the coaxial line on the rectangular waveguide 30, that is, the first coaxial feeding probe 50 is excited, the energy is radiated from the aperture of the metal floor 10 and operates in the 28 GHz frequency band. In this embodiment, adjusting the aperture size can adjust the high frequency point of the antenna, and the energy is radiated through the aperture, and its center frequency is 28 GHz.

[0054] The second coaxial feeding probe 60 is connected to the microstrip line 40, and its position has an impact on the low-frequency impedance matching. Specifically, the second coaxial feeding probe 60 passes through the metal floor 10 and is connected to the microstrip line 40 arranged above the metal floor 10. The second coaxial feeding probe 60 and the microstrip line 40 are arranged in an L shape to form an L-shaped feeding structure. The second coaxial feeding probe 60 transmits energy to the microstrip line 40, and the metal floor 10 can also be used as the metal ground of the upper radiation patch 20. The radiation patch 20 can be implemented by a circular patch made of metal material. The radiation patch 20 is used for low-frequency band radiation and works in the circular patch mode. The microstrip line 40 feeds the radiation patch 20 spaced apart from it by coupling, and excites the radiation patch 20, thereby generating a low-frequency microwave band. In this embodiment, when the first coaxial feeding probe 50 is connected to the microstrip line 40 and the L-shaped microstrip is excited, energy is coupled to the top radiation patch 20 to achieve radiation in the low frequency band. The radiation patch 20 operates in the 3.5 GHz frequency band.

[0055] The present invention sets two coaxial probes, the second coaxial feeding probe 60 of the low-frequency part passes through the metal floor 10 and is connected to the microstrip line 40, and the first coaxial feeding probe 50 of the high-frequency part is connected to the rectangular waveguide 30. One of the two coaxial probes is connected to the feeding and output to the microstrip line 40 respectively, so that the microstrip line 40 excites the radiation patch 20, and transmits to the rectangular waveguide 30 through the feeding probe to excite the two antenna parts respectively, thereby realizing the radiation of the microwave and millimeter wave frequency bands. The diameter and position of the probe can also affect the impedance matching of the antenna, thereby adjusting the bandwidth of the antenna. The large frequency ratio dual-frequency antenna of the present invention can work in the microwave frequency band and the millimeter wave frequency band at the same time, which is conducive to alleviating the pressure of band congestion and is easy to integrate.

[0056] Reference Figures 1 to 3 In one embodiment, the high frequency ratio dual-frequency antenna further includes:

[0057] The circular dielectric substrate 70 , the radiation patch 20 is arranged on a surface of the circular dielectric substrate 70 which is away from the metal floor 10 .

[0058] In this embodiment, the radiation patch 20 is laid on the front of the dielectric substrate, that is, the surface of one side away from the metal floor 10. The radiation patch 20 is made of metal material, such as copper or other good conductors. In this embodiment, copper or copper alloy, which has good conductivity and low cost, can be used. The outer contour of the radiation patch 20 can be square, circular or polygonal. Of course, in other embodiments, the shape of the radiation patch 20 is not limited, as long as it can form a radiator that radiates and receives electromagnetic energy. The radiation patch 20 can be covered on the first surface of the dielectric substrate by a printing process, or the circuit traces of the formed radiation patch 20 are attached to the circular dielectric substrate 70, or pressed onto the circular dielectric substrate 70 by other processes. Among them, the thickness, size and shape of the circular dielectric substrate 70 can be set according to the actual application product and application environment to meet different application requirements. In another embodiment, the shape of the circular dielectric substrate 70 can also be square, such as a rectangle or a square. The thickness selection of the circular dielectric substrate 70 is related to the dielectric constant of the material. This antenna selects a plate with a dielectric constant of 2.2.

[0059] Reference Figures 1 to 3 In a specific embodiment, the radiation patch 20 is arranged on the circular dielectric substrate 70 in a mesh shape to form a partial reflection surface structure.

[0060] In this embodiment, the radiation patch 20 on the circular dielectric substrate 70 is designed as a partial reflection surface structure with a periodic square aperture, which can reflect part of the incident wave, thereby playing a role in improving the antenna gain. The present invention adopts a circular dielectric substrate 70, and the radiation patch 20 on the upper layer is designed as a partial reflection surface structure. When the L-shaped microstrip is excited, the radiation patch 20 operates in the 3.5GHz frequency band. In the present invention, the top radiation patch 20 is excited by the microstrip line 40, and the circular dielectric substrate 70 is covered with a layer of circular metal patch with periodic square apertures cut out as a partial reflection surface structure. When generating radiation in the 3.5GHz frequency band, it can reflect part of the incident wave, thereby playing a role in improving the antenna gain. By determining the dielectric constant and thickness of the dielectric plate, adjusting the position of the microstrip line 40 and the length of the microstrip, the operating frequency and impedance matching can be adjusted.

[0061] Reference Figures 1 to 3 In one embodiment, the inner cavity cross-sectional size of the rectangular waveguide 30 is the same as the rectangular aperture 11 of the metal floor 10 .

[0062] A rectangular aperture 11 is added to the metal floor 10 to generate radiation in the high frequency band. The coaxial probe passes through the metal floor 10 and is connected to the upper microstrip line 40. The metal floor 10 can also be used as the metal ground of the upper radiation patch 20. The inner cavity cross-sectional size of the rectangular waveguide 30 is the same as the rectangular aperture 11 of the metal floor 10. The height of the inner cavity affects the performance. The circular through hole on the side can be connected to the coaxial probe.

[0063] Reference Figures 1 to 3 In one embodiment, the high frequency ratio dual-frequency antenna further includes:

[0064] A thin dielectric plate 80 , on which the microstrip line 40 is disposed.

[0065] In this embodiment, the microstrip line 40 is laid on the front side of the thin dielectric plate 80, that is, the side surface away from the metal floor 10. The microstrip line 40 is made of metal material, such as copper or other good conductors. In this embodiment, copper or copper alloy, which has good conductivity and low cost, can be used. The outer contour of the microstrip line 40 can be square, circular or polygonal. Of course, in other embodiments, the shape of the microstrip line 40 is not limited, as long as it can form a radiator that radiates and receives electromagnetic energy. The microstrip line 40 can be covered on the first surface of the thin dielectric plate 80 by a printing process, or the circuit routing of the formed microstrip line 40 is attached to the circular thin dielectric plate 80, or pressed onto the circular thin dielectric plate 80 by other processes. Among them, the thickness, size and shape of the circular thin dielectric plate 80 can be set according to the actual application product and application environment to meet different application requirements. In a specific embodiment, the shape of the thin dielectric plate 80 can also be square, such as a rectangle or a square. In this embodiment, the microstrip line 40 is placed on a thin dielectric plate 80 and connected to the first coaxial feeding probe 50 to excite the radiation patch 20 on the upper circular dielectric substrate 70. The position and length of the microstrip line 40 have an impact on the impedance matching, and the different height differences between the microstrip line 40 and the upper circular dielectric substrate 70 and the thickness of the dielectric plate have an impact on the matching of the antenna. The dielectric constant of the dielectric plate is also 2.2, and it is connected to the first coaxial feeding probe 50 for feeding, and then the radiation patch 20 on the top layer is excited by coupling to generate radiation in the low frequency band.

[0066] Reference Figures 1 to 3 In a specific embodiment, the thin dielectric plate 80 is fixed on the metal floor 10. Optionally, the thin dielectric plate 80 can be fixed to the upper metal floor 10 by insulating glue or the like. A through hole is formed on the metal floor 10, and the second coaxial feeding probe 60 passes through the through hole and is connected and fixed to the thin dielectric plate 80. The two can be fixed by threads, clamps, or nuts, etc., or the second coaxial feeding probe 60 can be welded to the microstrip line 40 side of the thin dielectric plate 80.

[0067] Alternatively, the second coaxial feeding probe 60 is fixed to the metal floor 10 via a fixing connector, and the thin dielectric plate 80 is fixed to the second coaxial feeding probe 60 and spaced apart from the metal floor 10. In this embodiment, the second coaxial feeding probe 60 can be fixed to the metal floor 10 via a flange structure, and the thin dielectric plate 80 is fixed to the second coaxial feeding probe 60 via a fixing member, so that the thin dielectric plate 80 is spaced apart from the metal floor 10.

[0068] Reference Figures 1 to 3 In one embodiment, the high frequency ratio dual-frequency antenna is further provided with:

[0069] A support column 90 , one end of which is fixed on the metal floor 10 , and the other end of which is used to be fixed on the radiation patch 20 .

[0070] In this embodiment, the support column 90 can be made of insulating material, and the support column 90 is sandwiched between the radiation patch 20 and the metal floor 10 to support and fix the radiation patch 20. In this embodiment, the number of the support column 90 can be one or more. When it is set to be more than one, the multiple support columns 90 are arranged at intervals around the radiation patch 20. In some embodiments, the high frequency ratio dual-frequency antenna is also provided with a locking member, such as a screw, which passes through the support column 90 to lock the radiation patch 20 to the metal floor 10.

[0071] It is understood that in the embodiments of the present invention, unless otherwise specified, the terms used, such as "connection" and "support", can be understood in a broad sense. For example, the connection method can be welding or screwing, or it can be detachable; the support can use support columns 90 of different materials such as foam or resin to support the dielectric plate. The specific operation can be handled in different ways according to the processing design.

[0072] Combined experiment and Figures 4 to 8 , the radiation characteristics of the above-mentioned large frequency ratio dual-frequency antenna are further explained:

[0073] Reference Figure 4 and Figure 5 It can be seen that the specific dimensions of the antenna are listed as follows. The diameters of the circular dielectric substrate 70 and the metal plate are: R1 = 36.5mm, R2 = 70mm, respectively. The thicknesses of the two plates are: h5 = 0.254mm, h2 = 2mm. The material of the circular dielectric substrate 70 is Rogers RT5880, and the dielectric constant is 2.2. The size of the metal patch aperture is a = 4.8mm, the interval in the middle is b = 1.6mm, the length of the microstrip line is Ls = 16.5mm, the width w3 = 2mm, the height h1 = 2mm, the dielectric plate height of the microstrip line is h7 = 0.508mm, and the support column height h4 = 5mm. The extracavity width of the metal waveguide is w1 = 6.3mm, the intracavity width is w2 = 3.5mm, the extracavity length is L1 = 9.8mm, and L2 = 7mm. The cavity height is h3 = 20mm, and the inner cavity height is h6 = 18.6mm.

[0074] Reference Figure 6As shown in the figure, the reflection coefficient and antenna gain measured by HFSS simulation software are shown. It can be seen from the figure that the working bandwidth of the high-frequency ratio dual-band antenna is 3.41GHz-3.62GHz in the low-frequency band and 27.11GHz-29.74GHz in the millimeter-wave band. The maximum gains of the two bands are 8.85dBi and 8.5dBi respectively.

[0075] Reference Figure 7 and Figure 8 As shown in FIG. 1 , the figure is the directional pattern result of the low-frequency and high-frequency parts of the large frequency ratio dual-frequency antenna in this embodiment. It can be seen from the figure that both frequency bands of the antenna are directional radiation and the cross polarization is relatively small. Figure 7 and Figure 8 These are the radiation patterns at 3.5 GHz and 28 GHz respectively. Each figure includes the parameters of the two surfaces, GainPhi and GainTheta.

[0076] From the above test results, it can be seen that the large frequency ratio dual-band antenna proposed in the present invention utilizes a patch antenna and a slot antenna on a metal plate to radiate, the antennas of the two frequency bands are both excited by coaxial probes, and the circular radiation patch is designed as a partially reflecting surface structure to increase the gain, thereby realizing radiation in the microwave and millimeter wave frequency bands and having good performance parameters.

[0077] The embodiment described above is only one of the specific implementation methods selected after optimization in the present invention. Any modifications or changes made by technicians in this field within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

[0078] The present invention further proposes a wireless communication device, the wireless communication device comprising the large frequency ratio dual-frequency antenna as described above. The detailed structure of the large frequency ratio dual-frequency antenna can refer to the above embodiment, and will not be repeated here; it can be understood that since the above large frequency ratio dual-frequency antenna is used in the wireless communication device of the present invention, the embodiment of the wireless communication device of the present invention includes all technical solutions of all embodiments of the above large frequency ratio dual-frequency antenna, and the technical effects achieved are also exactly the same, and will not be repeated here.

[0079] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A high frequency ratio dual-frequency antenna, characterized in that: The high frequency ratio dual-frequency antenna comprises: A metal floor, wherein a gap is formed on the metal floor; A radiation patch is spaced apart from the metal floor; A rectangular waveguide is fixed on the metal floor and corresponds to the position of the gap; A microstrip line is sandwiched between the metal floor and the radiation patch and is spaced apart from the radiation patch; A first coaxial feeding probe connected to the rectangular waveguide; A second coaxial feeding probe, penetrating the metal floor and electrically connected to the microstrip line; Wherein, the slot is a rectangular aperture, the first coaxial feeding probe transmits energy through the rectangular waveguide, and radiates outward through the rectangular aperture to generate a millimeter wave frequency band; The microstrip line feeds the radiation patch by coupling to generate a microwave frequency band.

2. The high frequency ratio dual-frequency antenna according to claim 1, characterized in that: The high frequency ratio dual-frequency antenna also includes: A circular dielectric substrate, wherein the radiation patch is arranged on a surface of one side of the circular dielectric substrate away from the metal floor.

3. The high frequency ratio dual-frequency antenna according to claim 2, characterized in that: The radiation patch is arranged on the circular dielectric substrate in a mesh shape to form a partial reflection surface structure.

4. The high frequency ratio dual-frequency antenna according to claim 1, characterized in that: The inner cavity cross-sectional dimensions of the rectangular waveguide are the same as the rectangular aperture of the metal plate.

5. The high frequency ratio dual-frequency antenna according to claim 1, characterized in that: A through hole is formed on a side wall of the rectangular waveguide at one end away from the metal floor, and the first coaxial feeding probe passes through the through hole and extends into the rectangular waveguide.

6. The high frequency ratio dual-frequency antenna according to claim 1, characterized in that: The high frequency ratio dual-frequency antenna also includes: A thin dielectric plate, on which the microstrip line is arranged.

7. The high frequency ratio dual-frequency antenna according to claim 6, characterized in that: The thin dielectric plate is fixed on the metal floor; or the second coaxial feeding probe is fixed on the metal floor through a fixing connector, and the thin dielectric plate is fixed on the second coaxial feeding probe and spaced apart from the metal floor.

8. The high frequency ratio dual-frequency antenna according to claim 1, characterized in that: The high frequency ratio dual-frequency antenna is also provided with: A support column, one end of which is fixed on the metal floor, and the other end of which is used to be fixed on the radiation patch.

9. The high frequency ratio dual-frequency antenna according to any one of claims 1 to 8, characterized in that: The second coaxial feeding probe and the microstrip line are arranged in an L shape; And / or, the rectangular waveguide is fixed on the metal floor via a fixing member.

10. A wireless communication device, characterized in that: The wireless communication device includes the high frequency ratio dual-frequency antenna as described in any one of claims 1-9.

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