Millimeter wave antenna device and terminal equipment

Abstract

The utility model provides a millimeter wave antenna device and a terminal device, the millimeter wave antenna device comprises a grounding plate, a dielectric plate, a radiation assembly and a feed assembly electrically connected with the radiation assembly which are connected in sequence, and the vertical projection of the radiation assembly covers the grounding plate; the radiation assembly comprises a main radiation unit and a secondary radiation unit, and the secondary radiation unit is coupled with the main radiation unit; the secondary radiation unit comprises a first radiation patch antenna, a second radiation patch antenna, a third radiation patch antenna and a fourth radiation patch antenna, and the first radiation patch antenna, the second radiation patch antenna, the third radiation patch antenna and the fourth radiation patch antenna are coupled and connected around the main radiation unit. The millimeter wave antenna device not only can effectively improve the isolation between antennas, but also can effectively improve the overall radiation efficiency of the antennas.

Description

Technical Field

[0001] The utility model relates to the technical field of communication, in particular to a millimeter wave antenna component and terminal equipment. Background Art

[0002] 5G millimeter wave technology is an important basic technology in 5G applications. Millimeter wave refers to a special electromagnetic wave with a wavelength of 1 mm to 10 mm and a waveguide frequency of 30 GHz-300 GHz. Equivalent to the frequency band below 6 GHz, millimeter wave has unique advantages such as large bandwidth, low air interface latency and flexible air interface configuration, which can meet the future wireless communication needs for system capacity, transmission rate and differentiated applications.

[0003] 3GPP defines the 5G frequency band range in TS 38.104 "NR base station wireless transmission and reception" specification, which determines the minimum RF characteristics and minimum performance requirements of 5GNR base stations. 5G frequency band information can also be obtained from TS 38.101-1 and TS38.101-2. 5GNR includes some LTE bands and also adds some new bands, such as N50, N51 / N70 and above. At present, the 5G bands most likely to be deployed globally are N77, N78, N257, N258 and N260, namely 3.3GHz-4.2GHz, 4.4GHz-5.0GHz and millimeter wave bands 26GHz / 28GHz / 39GHz.

[0004] However, the millimeter wave frequency band requires a multi-antenna system, so coupling between antennas is a difficult point in antenna design. In view of this, the utility model provides a millimeter wave antenna device and a terminal device using the patch antenna device. Utility Model Content

[0005] The purpose of the utility model is to provide a millimeter wave antenna device, which can not only effectively improve the isolation between antennas, but also effectively improve the overall radiation efficiency of the antenna.

[0006] In order to solve the above technical problems, the utility model provides a millimeter wave antenna device, which includes a ground plane, a dielectric plate, a radiation component and a feeding component electrically connected to the radiation component, which are connected in sequence, and the vertical projection of the radiation component covers the ground plane; the radiation component includes a main radiation unit and a secondary radiation unit, the secondary radiation unit is arranged around the main radiation unit and coupled with the main radiation unit, and the secondary radiation unit includes at least one radiation patch antenna, which is arranged around the main radiation unit. As a further improvement of the utility model, the main radiation unit is configured as a rectangular radiation patch antenna, the secondary radiation unit includes a first radiation patch antenna, a second radiation patch antenna, a third radiation patch antenna and a fourth radiation patch antenna, and the radiation patches in the secondary radiation unit are all configured as rectangular radiation patch antennas, and are arranged in sequence around the side length of the main radiation unit.

[0007] As a further improvement of the present invention, the main radiating unit is configured as a rectangular radiating patch antenna, and the secondary radiating unit includes six radiating patch antennas, four of which are symmetrically arranged on both sides of the long side of the main radiating unit, and the other two are symmetrically arranged on both sides of the short side of the main radiating unit.

[0008] As a further improvement of the present invention, the first radiating patch antenna and the third radiating patch antenna are symmetrically arranged, and the second radiating patch antenna and the fourth radiating patch antenna are symmetrically arranged.

[0009] As a further improvement of the present utility model, the long side of the main radiating unit is defined as L, the wide side of the main radiating unit is defined as W, the first radiating patch antenna and the second radiating patch antenna are symmetrically arranged on both sides of the wide side of the main radiating unit, and the third radiating patch antenna and the fourth radiating patch antenna are symmetrically arranged on both sides of the long side of the main radiating unit.

[0010] As a further improvement of the present invention, the range of the long side L of the main radiation unit is 3.2 mm ± 0.1, and the range of the wide side W of the main radiation unit is 4 mm ± 0.1.

[0011] As a further improvement of the present invention, the first radiating patch antenna and the third radiating patch antenna are respectively coupled to the wide side of the main radiating unit, and the coupling spacing S1 is in the range of 0.04mm±0.05; the second radiating patch antenna and the fourth radiating patch antenna are respectively coupled to the long side of the main radiating unit, and the coupling spacing S2 is in the range of 0.17mm±0.05.

[0012] As a further improvement of the present invention, the length range of the first radiating patch antenna and the third radiating patch antenna is 2.852mm±0.1, and the width range is 4mm±0.1; the length range of the second radiating patch antenna and the fourth radiating patch antenna is 2.855mm±0.1, and the width range is 4mm±0.1.

[0013] As a further improvement of the present invention, the feeding assembly is configured as coaxial line feeding, and the feeding point of the coaxial line feeding is located on the symmetry line of the main radiating unit.

[0014] The purpose of the utility model is to provide a terminal device to better apply the above-mentioned millimeter wave antenna device.

[0015] In order to solve the above technical problems, the utility model provides a terminal device, which includes the above-mentioned millimeter wave antenna device.

[0016] The utility model provides a millimeter wave antenna device, which includes a ground plate, a dielectric plate, a radiation component and a feeding component electrically connected to the radiation component in sequence, wherein the vertical projection of the radiation component covers the ground plate; the radiation component includes a main radiation unit and a secondary radiation unit, wherein the secondary radiation unit is arranged around the main radiation unit and coupled to the main radiation unit, and the secondary radiation unit includes at least one radiation patch antenna, wherein the radiation patch antenna is arranged around the main radiation unit. The millimeter wave antenna device of the utility model can not only effectively improve the isolation between antennas, but also effectively improve the overall radiation efficiency of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the millimeter wave antenna device of the present utility model.

[0018] Figure 2 This is a simulation result diagram of the millimeter wave antenna device S11 of the present utility model.

[0019] Figure 3 This is the efficiency simulation curve of the millimeter wave antenna device of the present utility model.

[0020] Figure 4 It is a schematic structural diagram of another embodiment of the millimeter wave antenna device of the present utility model.

[0021] The descriptions of the reference numerals are as follows:

[0022] A primary radiating unit 10 , a secondary radiating unit 20 , a first radiating patch antenna 21 , a second radiating patch antenna 22 , a third radiating patch antenna 23 , a fourth radiating patch antenna 24 , and a feeding component 30 . DETAILED DESCRIPTION

[0023] The millimeter wave antenna device proposed in the present invention and the terminal device using the patch antenna device are further described in detail below in combination with the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In addition, the structure shown in the accompanying drawings is often part of the actual structure. In particular, the emphasis that each drawing needs to show is different, and sometimes different proportions are used.

[0024] In recent years, with the growing demand for millimeter wave systems, millimeter wave technology has made major breakthroughs in the development of transmitters, receivers, antennas, and millimeter wave devices, and millimeter wave radar has entered a new stage of various applications. Millimeter waves have a large number of applications in communications, radar, remote sensing, and radio astronomy. In order to successfully design and develop millimeter wave systems with excellent performance, it is necessary to understand the atmospheric propagation characteristics of millimeter waves under different meteorological conditions. The factors that affect the propagation characteristics of millimeter waves mainly include the absorption of molecules that constitute the atmospheric components, oxygen, water vapor, precipitation, suspended matter in the atmosphere, and the environment. The combined effect of these factors will cause the millimeter wave signal to be attenuated, scattered, change polarization and propagation path, and then introduce new noise in the millimeter wave system. These many factors will have a great impact on the operation of the millimeter wave system, so we must study the propagation characteristics of millimeter waves in detail.

[0025] Decoupling between millimeter wave antennas has always been a technical difficulty that the industry has paid more attention to. This utility model conducts research on the decoupling between millimeter wave antennas. The traditional methods of reducing antenna unit coupling are polarization isolation, spatial isolation, and neutral line isolation. Currently, the above methods do not solve the technical problem of decoupling between millimeter wave antennas in the high-frequency millimeter wave band.

[0026] like Figure 1 As shown, the utility model provides a millimeter wave antenna device, which can be applied to millimeter wave devices of relevant terminal devices. Specifically, the millimeter wave antenna device includes a ground plane, a dielectric plate, a radiation component, and a feeding component 30 electrically connected to the radiation component, which are connected in sequence, and the vertical projection of the radiation component covers the ground plane; the radiation component includes a main radiation unit 10 and a secondary radiation unit 20, and the secondary radiation unit 20 is arranged around the main radiation unit 10 and coupled to the main radiation unit 10; the secondary radiation unit 20 includes at least one radiation patch antenna, and the radiation patch antenna is arranged around the main radiation unit 10.

[0027] With such a configuration, the millimeter wave antenna device of the present invention can not only effectively improve the isolation between antennas, but also effectively improve the overall radiation efficiency of the antenna. Specifically, the present invention can achieve an emission coefficient bandwidth of more than 3 GHz, where 3 GHz refers to a bandwidth range of more than 3 GHz.

[0028] In one embodiment of the utility model, the secondary radiating unit 20 is coupled and connected to the main radiating unit 10; the secondary radiating unit 20 includes a first radiating patch antenna 21, a second radiating patch antenna 22, a third radiating patch antenna 23 and a fourth radiating patch antenna 24, and the first radiating patch antenna 21, the second radiating patch antenna 22, the third radiating patch antenna 23 and the fourth radiating patch antenna 24 are coupled and connected around the main radiating unit 10.

[0029] The utility model further comprises that the main radiating unit 10 is configured as a rectangular radiating patch antenna, and the first radiating patch antenna 21, the second radiating patch antenna 22, the third radiating patch antenna 23 and the fourth radiating patch antenna 24 are all configured as rectangular radiating patch antennas, and are sequentially arranged around the side length of the main radiating unit 10. Of course, the radiating patch antenna in the secondary radiating unit 20 can also be arranged in other shapes, such as a pentagon, a hexagon or other polygonal forms.

[0030] Further, the first radiating patch antenna 21 and the third radiating patch antenna 23 are symmetrically arranged, and the second radiating patch antenna 22 and the fourth radiating patch antenna 24 are symmetrically arranged. The long side of the main radiating unit 10 is defined as L, the wide side of the main radiating unit 10 is defined as W, the first radiating patch antenna 21 and the second radiating patch antenna 22 are symmetrically arranged on both sides of the wide side of the main radiating unit 10, and the third radiating patch antenna 23 and the fourth radiating patch antenna 24 are symmetrically arranged on both sides of the long side of the main radiating unit 10.

[0031] Preferably, the range of the long side L of the main radiating unit 10 is 3.2mm±0.1, and the range of the wide side W of the main radiating unit 10 is 4mm±0.1. The first radiating patch antenna 21 and the third radiating patch antenna 23 are respectively coupled with the wide side of the main radiating unit 10, and the range of the coupling spacing S1 is 0.04mm±0.05; the second radiating patch antenna 22 and the fourth radiating patch antenna 24 are respectively coupled with the long side of the main radiating unit 10, and the range of the coupling spacing S2 is 0.17mm±0.05. The length range of the first radiating patch antenna 21 and the third radiating patch antenna 23 is 2.852mm±0.1, and the width range is 4mm±0.1. The length range of the second radiating patch antenna 22 and the fourth radiating patch antenna 24 is 2.855mm±0.1, and the width range is 4mm±0.1.

[0032] Further, the feeding assembly 30 is configured as a coaxial line feeding, and the feeding point of the coaxial line feeding is located on the symmetry line of the main radiating unit 10. The feeding position of the utility model is set on the middle symmetry axis to achieve more uniform feeding. The feeding position affects the input impedance of the antenna. The closer the antenna feeding is to the edge of the patch, the greater the input impedance. The more the input impedance deviates from 50 ohms, the more difficult it is to match. Therefore, a suitable distance needs to be selected. Preferably, the length of the first radiating patch antenna 21 is 2.851mm, the length of the second radiating patch antenna 22 is 2.852mm, the length of the third radiating patch antenna 23 is 2.854mm, and the length of the fourth radiating patch antenna 24 is 2.855mm; the width of the first radiating patch antenna 21, the width of the second radiating patch antenna 22, the width of the third radiating patch antenna 23 and the width of the fourth radiating patch antenna 24 are preferably 4.0mm. The coupling spacing between the first radiating patch antenna 21 and the main radiating unit 10 and the coupling spacing between the third radiating patch antenna 23 and the main radiating unit 10 are the same, and preferably the coupling spacing is 0.04 mm; the coupling spacing between the second radiating patch antenna 22 and the main radiating unit 10 and the coupling spacing between the fourth radiating patch antenna 24 and the main radiating unit 10 are the same, and preferably the coupling spacing is 0.17 mm.

[0033] like Figure 2As shown, the S11 simulation results of the millimeter wave antenna are given. From the simulation results, it can be seen that the antenna achieves good resonance in the 25.33GHz-30.71GHz frequency band, and there are multiple resonance points in the band, which means that the millimeter wave antenna achieves good resonance under the action of the coupled sub-radiation unit 20. In principle, the number of parasitic radiation patch antennas in the sub-radiation unit 20 directly affects the reflection coefficient bandwidth of the antenna. If the number of parasitic radiation patches is reduced, the reflection coefficient bandwidth will become narrower. The utility model preferably has four parasitic patches to achieve a relatively wide reflection coefficient bandwidth.

[0034] like Figure 2 As shown, the millimeter wave antenna has four obvious resonance points within the band. These four resonance points are the four parasitic radiating patch antennas of the antenna. Since the sizes of the first radiating patch antenna 21, the second radiating patch antenna 22, the third radiating patch antenna 23 and the fourth radiating patch antenna 24 are different, four different local resonances can be achieved within the antenna band, thereby widening the bandwidth of the antenna. In other words, preferably, the sizes of the four parasitic radiating patch antennas of the utility model are inconsistent, resulting in four different local resonances within the antenna band, thereby widening the overall bandwidth of the antenna. Of course, the number of parasitic radiating patch antennas set in the utility model can also be other, so that local resonances consistent with the number of parasitic radiating patches set can be obtained.

[0035] In the embodiment of the present invention, four local resonances constitute the main resonance of the antenna, and the frequency range of the main resonance is mainly determined by the size of the radiation patch. The resonance of the radiation patch of the main radiation unit 10 is recorded between the local resonance 1 and the local resonance 4. Because of the existence of the local resonance, the main radiation resonance is not obvious, but the main radiation resonance actually exists. Figure 3 As shown in the figure, the efficiency simulation result of the entire antenna is given. It can be seen from the figure that the efficiency of the antenna at the 28GHz frequency point reaches more than 70%. This shows that the antenna as a whole has achieved good radiation. A point in the figure represents the 28GHz frequency point. This frequency point indicates that the total efficiency at 28GHz is about 0.72, which is a relatively high overall antenna efficiency indicator. The millimeter-wave antenna device of the utility model can achieve a reflection coefficient bandwidth of more than 3GHz. The 3GHz here refers to a bandwidth range of more than 3GHz. Figure 2 From the bandwidth corresponding to below -10dB, it can be seen that the bandwidth frequency range is approximately 5GHz, which is obviously greater than 3GHz.

[0036] like Figure 4As shown, in another embodiment of the utility model, the main radiating unit 10 is configured as a rectangular radiating patch antenna, and the secondary radiating unit includes six radiating patch antennas, wherein four of the radiating patch antennas are symmetrically arranged on both sides of the long side of the main radiating unit, and the other two radiating patch antennas are symmetrically arranged on both sides of the short side of the main radiating unit. With such an arrangement, the millimeter wave antenna device of the utility model can not only effectively improve the isolation between antennas, but also effectively improve the overall radiation efficiency of the antenna. Specifically, the utility model can achieve an emission coefficient bandwidth of more than 3 GHz, where 3 GHz refers to a bandwidth range of more than 3 GHz.

[0037] In summary, the utility model provides a millimeter wave antenna device, which includes a ground plane, a dielectric plate, a radiation component and a feeding component 30 electrically connected to the radiation component, and the vertical projection of the radiation component covers the ground plane; the radiation component includes a main radiation unit 10 and a secondary radiation unit 20, and the secondary radiation unit 20 is coupled and connected to the main radiation unit 10; the secondary radiation unit 20 includes a first radiation patch antenna 21, a second radiation patch antenna 22, a third radiation patch antenna 23 and a fourth radiation patch antenna 24, and the first radiation patch antenna 21, the second radiation patch antenna 22, the third radiation patch antenna 23 and the fourth radiation patch antenna 24 are coupled and connected around the main radiation unit 10. The millimeter wave antenna device of the utility model can not only effectively improve the isolation between antennas, but also effectively improve the overall radiation efficiency of the antenna.

[0038] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other. In addition, the different parts between the various embodiments can also be used in combination with each other, and the present utility model is not limited to this.

[0039] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A millimeter wave antenna device, characterized in that: The millimeter wave antenna device comprises a ground plate, a dielectric plate, a radiation component and a feeding component electrically connected to the radiation component, which are connected in sequence, and the vertical projection of the radiation component covers the ground plate; the radiation component comprises a main radiation unit and a secondary radiation unit, and the secondary radiation unit is arranged around the main radiation unit and coupled to the main radiation unit; The secondary radiation unit includes at least one radiation patch antenna, and the radiation patch antenna is arranged around the main radiation unit.

2. The millimeter wave antenna device according to claim 1, characterized in that: The main radiating unit is configured as a rectangular radiating patch antenna, and the secondary radiating unit includes a first radiating patch antenna, a second radiating patch antenna, a third radiating patch antenna and a fourth radiating patch antenna. The radiating patch antennas in the secondary radiating units are all configured as rectangular radiating patch antennas and are arranged in sequence around the side length of the main radiating unit.

3. The millimeter wave antenna device according to claim 1, characterized in that: The main radiating unit is configured as a rectangular radiating patch antenna, and the secondary radiating unit includes six radiating patch antennas, four of which are symmetrically arranged on both sides of the long side of the main radiating unit, and the other two are symmetrically arranged on both sides of the short side of the main radiating unit.

4. The millimeter wave antenna device according to claim 2, characterized in that: The first radiating patch antenna and the third radiating patch antenna are symmetrically arranged, and the second radiating patch antenna and the fourth radiating patch antenna are symmetrically arranged.

5. The millimeter wave antenna device according to claim 4, characterized in that: The long side of the main radiating unit is defined as L, the wide side of the main radiating unit is defined as W, the first radiating patch antenna and the second radiating patch antenna are symmetrically arranged on both sides of the wide side of the main radiating unit, and the third radiating patch antenna and the fourth radiating patch antenna are symmetrically arranged on both sides of the long side of the main radiating unit.

6. The millimeter wave antenna device according to claim 5, characterized in that: The range of the long side L of the main radiation unit is 3.2 mm ± 0.1, and the range of the wide side W of the main radiation unit is 4 mm ± 0.

1.

7. The millimeter wave antenna device according to claim 6, characterized in that: The first radiating patch antenna and the third radiating patch antenna are respectively coupled to the wide side of the main radiating unit, and the coupling spacing S1 is in the range of 0.04mm±0.05; the second radiating patch antenna and the fourth radiating patch antenna are respectively coupled to the long side of the main radiating unit, and the coupling spacing S2 is in the range of 0.17mm±0.

05.

8. The millimeter wave antenna device according to claim 7, characterized in that: The length range of the first radiating patch antenna and the third radiating patch antenna is 2.852 mm ± 0.1, and the width range is 4 mm ± 0.1; the length range of the second radiating patch antenna and the fourth radiating patch antenna is 2.855 mm ± 0.1, and the width range is 4 mm ± 0.

1.

9. The millimeter wave antenna device according to claim 8, characterized in that: The feeding assembly is configured as a coaxial line feeding, and a feeding point of the coaxial line feeding is located on a symmetry line of the main radiating unit.

10. A terminal device, characterized in that: The terminal device includes the millimeter wave antenna device according to any one of claims 1-9.

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