Antenna device and electronic equipment

Abstract

The utility model provides an antenna device and an electronic device. The antenna device comprises a first metal layer and a second metal layer which are parallel to each other. The first metal layer comprises a radiation structure and a right-handed circular polarization feed network; the second metal layer comprises a left-hand circular polarization feed network and a first metal through hole; the right-handed circular polarization feed network is connected with a horizontal input port of the radiation structure; the left-hand circular polarization feed network is connected with a vertical input port of the radiation structure through a first metal through hole; the bandwidth can be increased, and the requirement of multi-band communication is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to wireless technical field especially relates to an antenna device and electronic equipment. BACKGROUND

[0002] Circular polarization antenna can effectively cope with Faraday rotation effect when electromagnetic wave passes through ionosphere, therefore, high flux satellite communication system usually adopts circular polarization antenna, but the existing circular polarization antenna bandwidth is limited, it is difficult to satisfy the demand of multi-frequency band communication. SUMMARY

[0004]

[0003] The utility model embodiment provides a kind of antenna device and electronic equipment, can satisfy the demand of multi-frequency band communication.

[0004] To achieve the above object, the technical scheme of the utility model embodiment is as follows:

[0005] First, the utility model provides an antenna device, the antenna device includes parallel first metal layer and second metal layer;The first metal layer includes radiation structure and right-handed circular polarization feed network;The second metal layer includes left-handed circular polarization feed network and first metal via;The right-handed circular polarization feed network is connected with the horizontal input port of the radiation structure;The left-handed circular polarization feed network is connected with the vertical input port of the radiation structure by the first metal via.

[0006] Second, the utility model provides an electronic equipment, the electronic equipment includes the antenna device described above.

[0007] The utility model provides an antenna device and electronic equipment, antenna device includes parallel first metal layer and second metal layer;First metal layer includes radiation structure and right-handed circular polarization feed network;Second metal layer includes left-handed circular polarization feed network and first metal via;Right-handed circular polarization feed network is connected with the horizontal input port of the radiation structure;Left-handed circular polarization feed network is connected with the vertical input port of the radiation structure by first metal via.Using the above scheme, by using the first metal layer including radiation structure and right-handed circular polarization feed network, and the second metal layer including left-handed circular polarization feed network and first metal via, right-handed circular polarization feed network is connected with the horizontal input port of the radiation structure;Left-handed circular polarization feed network is connected with the vertical input port of the radiation structure by first metal via, left-handed circular polarization feed network and right-handed circular polarization feed network are constructed into double circular polarization feed network, so as to increase bandwidth, satisfy the demand of multi-frequency band communication. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 The structure diagram of the antenna device provided in the utility model embodiment is shown;

[0009] Figure 2 Another exemplary structure schematic diagram of an antenna device provided by the embodiment of the present application is shown in FIG. 6.

[0010] Figure 3 An exemplary structure schematic diagram of a first metal layer provided by the embodiment of the present application is shown in FIG. 7.

[0011] Figure 4 An exemplary structure schematic diagram of a second metal layer provided by the embodiment of the present application is shown in FIG. 8.

[0012] Figure 5 An exemplary structure schematic diagram of a third metal layer provided by the embodiment of the present application is shown in FIG. 9.

[0013] Figure 6 An exemplary simulation result schematic diagram of an antenna device provided by the embodiment of the present application is shown in FIG. 10. DETAILED DESCRIPTION

[0014] In order to enable persons skilled in the art to better understand the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application will be described in detail below with reference to the accompanying drawings, which are only used for reference and are not intended to limit the embodiments of the present application.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description herein is for describing the embodiments of the present application only and is not intended to limit the present application.

[0016] In the following description, "some embodiments" are described, which describe a subset of all possible embodiments, but it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict. It should also be pointed out that the terms "first\second" and the like used in the embodiments of the present application are only used to distinguish similar objects, and do not represent a specific order of the objects. It can be understood that "first\second" and the like can be interchanged in a specific order or sequence as allowed, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0017] With the rapid expansion of global communication services, spectrum resources are increasingly strained and crowded, and there is an urgent need to develop multi-band satellite communication systems to support high-throughput satellite communication (HTS), such as K-band and Ka-band communication. Since circularly polarized antennas can effectively cope with the Faraday rotation effect of electromagnetic waves passing through the ionosphere, high-throughput satellite communication systems usually use circularly polarized antennas. However, existing dual circularly polarized antennas have limited bandwidth, making it difficult to meet the needs of multi-band communication. In addition, traditional antenna designs usually rely on polarizers to achieve right-handed circularly polarized and left-handed circularly polarized radiation, which not only increases the volume and weight of the antenna, but also reduces its practicality in space applications. Therefore, it is of great significance to develop an antenna with low profile, wideband characteristics and supporting K / Ka-band dual circular polarization to improve the performance and efficiency of satellite communication systems.

[0018] The inherent disadvantage of microstrip patch antennas is that the impedance bandwidth is narrow, making it difficult to support multi-band coverage required by high-throughput satellite communication, especially in high-frequency bands such as K / Ka bands, which have limited performance. Second, existing antenna structures rely on external polarizers to generate right-handed and left-handed circularly polarized radiation, which can achieve dual circular polarization function, but significantly increases the complexity, volume and weight of the antenna, limiting its flexibility in space-restricted application scenarios. In addition, the manufacturing process of the antenna is complex and the material cost is high, hindering large-scale application.

[0019] Based on this, the utility model embodiment provides a kind of antenna device, Figure 1 The structure diagram of the antenna device provided in the embodiment of the utility model is shown in the figure; Figure 2 The structure diagram of another exemplary antenna device provided in the embodiment of the utility model is shown in the figure;The antenna device 10 includes parallel first metal layer 101 and second metal layer 102;First metal layer 101 includes radiation structure 1011 and right-handed circularly polarized feed network 1012;Second metal layer 102 includes left-handed circularly polarized feed network 1021 and first metal through hole 1022;Right-handed circularly polarized feed network 1012 is connected with the horizontal input port of radiation structure 1011;Left-handed circularly polarized feed network 1021 is connected with the vertical input port of radiation structure 1011 through first metal through hole 1022.

[0020] It should be noted that the antenna device 10 can be understood as an antenna array, as an example, in actual application, the antenna device 10 can be exemplified as K and Ka width dual circularly polarized antenna array. First metal layer 101 is located in the upper layer of second metal layer 102.

[0021] For the convenience of understanding, Figure 3 The structure diagram of an exemplary first metal layer provided in the embodiment of the utility model is shown in the figure, and the following will be combinedFigure 3 The first metal layer 101 also includes a first port 1013. The radiation structure 1011 includes a plurality of radiation units 301 of a first shape. The number of the radiation units 301 can be determined according to actual conditions, which is not limited herein. As an example, the number of the radiation units 301 can be 8, and each radiation unit 301 has the same structure. The first shape can be any shape. As an example, the first shape can be a rectangle. That is, the radiation structure 1011 includes 8 radiation units 301.

[0022] In the embodiment of the utility model, the radiation unit 301 includes a coplanar waveguide feed line 3011, a ground branch 3012 and a cut corner slot 3013; a first part of the coplanar waveguide feed line 3011 is connected with the cut corner slot 3013; a second part of the coplanar waveguide feed line 3011 is connected with the ground branch 3012; the cut corner slot 3013 and the ground branch 3012 are in a diagonal relationship within the first shape.

[0023] In the embodiment of the utility model, the radiation unit 301 also includes a first T-shaped branch 3014 and a second T-shaped branch 3015 which are orthogonal; a first part of the first T-shaped branch 3014 is located between a first end of the first part of the coplanar waveguide feed line 3011 and a first end of the second part of the coplanar waveguide feed line 3011; a second part of the first T-shaped branch 3014 is located between the first end of the first part of the coplanar waveguide feed line 3011 and a first end of the ground branch 3012; a first part of the second T-shaped branch 3015 is located between a second end of the first part of the coplanar waveguide feed line 3011 and a second end of the second part of the coplanar waveguide feed line 3011; a second part of the second T-shaped branch 3015 is located between the second end of the first part of the coplanar waveguide feed line 3011 and a second end of the ground branch 3012.

[0024] It should be noted that the first part of the coplanar waveguide feed line 3011 can be understood as the part connected with the cut corner slot 3013, and the second part of the coplanar waveguide feed line 3011 can be understood as the part connected with the ground branch 3012. The first part of the first T-shaped branch 3014 can be understood as the lower half of the T shape in the first T-shaped branch 3014, and the second part of the first T-shaped branch 3014 can be understood as the upper half of the T shape in the first T-shaped branch 3014.

[0025] The first part of the first T-shaped branch 3014 is located between the first end of the first part of the coplanar waveguide feed line 3011 and the first end of the second part of the coplanar waveguide feed line 3011. It can be understood that the lower half of the T shape in the first T-shaped branch 3014 is located between the first end of the first part of the coplanar waveguide feed line 3011 and the first end of the second part of the coplanar waveguide feed line 3011, and is parallel to and does not intersect between the first end of the first part of the coplanar waveguide feed line 3011 and the first end of the second part of the coplanar waveguide feed line 3011.

[0026] The second part of the first T-shaped branch 3014 is located between the first end of the first part of the coplanar waveguide feed line 3011 and the first end of the ground branch 3012. It can be understood that the upper half of the T shape in the first T-shaped branch 3014 is located between the first end of the first part of the coplanar waveguide feed line 3011 and the first end of the ground branch 3012. Specifically, the upper half of the T shape in the first T-shaped branch 3014 is located between the first end of the first part of the coplanar waveguide feed line 3011, the first end of the second part of the coplanar waveguide feed line 3011, and the first end of the ground branch 3012, and is parallel to and does not intersect between the first end of the first part of the coplanar waveguide feed line 3011, the first end of the second part of the coplanar waveguide feed line 3011, and the first end of the ground branch 3012.

[0027] It should be noted that the first part of the second T-shaped branch 3015 can be understood as the lower half of the T shape in the second T-shaped branch 3015, and the first part of the second T-shaped branch 3015 can be understood as the upper half of the T shape in the second T-shaped branch 3015.

[0028] The first part of the second T-shaped branch 3015 is located between the second end of the first part of the coplanar waveguide feed line 3011 and the second end of the second part of the coplanar waveguide feed line 3011. It can be understood that the lower half of the T shape in the second T-shaped branch 3015 is located between the second end of the first part of the coplanar waveguide feed line 3011 and the second end of the second part of the coplanar waveguide feed line 3011, and is parallel to and does not intersect between the second end of the first part of the coplanar waveguide feed line 3011 and the second end of the second part of the coplanar waveguide feed line 3011.

[0029] The second part of the second T-shaped branch 3015 is located between the second end of the first part of the coplanar waveguide feed line 3011 and the second end of the ground branch 3012. It can be understood that the upper half of the T shape in the second T-shaped branch 3015 is located between the second end of the first part of the coplanar waveguide feed line 3011, the second end of the second part of the coplanar waveguide feed line 3011, and the second end of the ground branch 3012, and is parallel to and does not intersect between the second end of the first part of the coplanar waveguide feed line 3011, the second end of the second part of the coplanar waveguide feed line 3011, and the second end of the ground branch 3012.

[0030] Specifically, in combination with Figure 3 , the first end of the first part of the coplanar waveguide feed line 3011 can be understood as the end of the first part of the coplanar waveguide feed line 3011 parallel to the lower half of the T-shaped in the first T-shaped branch 3014; the second end of the first part of the coplanar waveguide feed line 3011 can be understood as the end of the first part of the coplanar waveguide feed line 3011 parallel to the lower half of the T-shaped in the second T-shaped branch 3015. The first end of the ground branch 3012 can be understood as the end parallel to the upper half of the T-shaped in the first T-shaped branch 3014; the second end of the ground branch 3012 can be understood as the end parallel to the upper half of the T-shaped in the second T-shaped branch 3015.

[0031] Compared with the current double circularly polarized antenna based on the microstrip patch structure, the scheme of the embodiment of the utility model realizes the double circularly polarized performance by adopting the coplanar waveguide feed line and the orthogonal T-shaped branch, and expands the axial ratio bandwidth by introducing the ground branch, and realizes the wideband double circularly polarized performance.

[0032] It should be noted that the right-handed circularly polarized feed network 1012 connects the horizontal input ports of the 8 radiation units 301, and a step impedance change is designed in a two-way power division structure of the right-handed circularly polarized feed network 1012 to support the wideband operation of the array.

[0033] In the embodiment of the utility model, Figure 4 An exemplary structure diagram of the second metal layer is provided in the embodiment of the utility model; as Figure 4 Indicated, the second metal layer 102 includes a left-handed circularly polarized feed network 1021, a first metal through hole 1022 and a second port 1023.

[0034] It should be noted that the left-handed circularly polarized feed network 1021 connects the vertical input ports of the 8 radiation units 301 through the first metal through hole 1022. And a step impedance change is designed in a two-way power division structure of the left-handed circularly polarized feed network 1021 to support the wideband operation of the array.

[0035] The scheme of the embodiment of the utility model provides wideband performance for the antenna array by the coplanar waveguide feed structure and the right-handed circularly polarized feed network and the left-handed circularly polarized feed network of the step impedance transformation, and realizes the wideband double circularly polarized in K band and Ka band.

[0036] In the embodiment of the utility model, the antenna device 10 further includes a third metal layer 103; the third metal layer 103 is located between the first metal layer 101 and the second metal layer 102; the third metal layer 103 is parallel to the first metal layer 101 and the second metal layer 102 respectively.

[0037] It should be noted that the third metal layer 103 is located between the first metal layer 101 and the second metal layer 102, and the three metal layers are in parallel with each other.

[0038] For the convenience of understanding, Figure 5 An exemplary structure diagram of the third metal layer is provided for the embodiment of the utility model; as Figure 5 As shown, the third metal layer 103 includes a second metal via hole 1031, a first surface 1032 and a square groove 1033. Specifically, the first surface 1032 is connected with the first metal layer 101 through the second metal via hole 1031; the second metal via hole 1031 is arranged outside the square groove 1033; the number of the square groove 1033 is the same as the number of the radiation unit 301 included in the radiation structure 1011.

[0039] It should be noted that the first surface 1032 can be understood as the ground. The ground of the third metal layer 103 is connected with the first metal layer 101 through the second metal via hole 1031, and a coplanar waveguide feed network can be constructed. The second metal via hole 1031 is arranged outside the square groove 1033, and the number of the second metal via hole 1031 can be determined according to actual conditions, which is not limited here. The number of the square groove 1033 is the same as the number of the radiation unit 301, which is 8.

[0040] The scheme of the embodiment of the utility model arranges the right-handed circularly polarized feed network and the left-handed circularly polarized feed network in the upper and lower two layers of the ground in a compact manner, so that a larger antenna array can be constructed.

[0041] In the embodiment of the utility model, the antenna device 10 further includes a parallel first layer dielectric substrate 104 and a second layer dielectric substrate 105; the first layer dielectric substrate 104 is perpendicular to the first metal layer 101, the second metal layer 102 and the third metal layer 103; the second layer dielectric substrate 105 is perpendicular to the first metal layer 101, the second metal layer 102 and the third metal layer 103.

[0042] It should be noted that the first layer dielectric substrate 104 and the second layer dielectric substrate 105 are the same dielectric substrate. In actual application, the material of the first layer dielectric substrate 104 and the second layer dielectric substrate 105 is Roger 5880.

[0043] The scheme of the embodiment of the utility model adopts two layer dielectric substrates, is easy to integrate with a microwave circuit, realizes double circular polarization characteristics by changing the current path in the cut corner groove, has the advantages of low profile, and has a wider application range.

[0044] For the convenience of understanding, in practical application, the antenna device 10 can be exemplified as a K / Ka broadband dual circularly polarized antenna array. The antenna unit has two orthogonal coplanar waveguide feed ports, the axial ratio bandwidth of circular polarization is expanded by introducing a ground branch in a cut corner slot, then two kinds of stepped impedance transformation broadband feed networks are designed to form a super wideband dual circularly polarized antenna array, the array has a wide impedance bandwidth and axial ratio bandwidth in the K band and the Ka band, and meets the low profile and broadband requirements of high flux satellite communication. The antenna comprises two layers of dielectric substrates and three layers of metal layers, the two layers of dielectric substrates are Roger5880, the first layer of metal layer is a radiation structure and a right-handed circularly polarized feed network, the second layer of metal layer is a left-handed circularly polarized feed network, and the third layer of metal layer is a ground; the metal via hole in the second layer of metal layer connects the left-handed circularly polarized feed network and the radiation structure.

[0045] Specifically, the first layer of metal layer comprises: a first port, a right-handed circularly polarized feed network and a radiation unit. The radiation unit is composed of a coplanar waveguide feed line, a T-shaped branch, a ground branch and a cut corner slot. The two orthogonal T-shaped branches extend into the cut corner slot, changing the current distribution inside the cut corner slot, thereby forming two phase-orthogonal electric fields, and further realizing the circular polarization characteristic. Further, a ground branch is added in the cut corner slot to obtain a wider axial ratio bandwidth. The right-handed circularly polarized feed network is connected to the horizontal input port of the eight radiation units, and a stepped impedance change is designed in the one-to-two power division structure of the right-handed circularly polarized feed network to support the broadband operation of the array.

[0046] The second layer of metal layer comprises: a second port, a left-handed circularly polarized feed network and a first metal via hole. The left-handed circularly polarized feed network is connected to the vertical input port of the eight radiation units through the metal via hole, and a stepped impedance change is designed in the one-to-two power division structure of the left-handed circularly polarized feed network to support the broadband operation of the array. The right-handed circularly polarized feed network and the left-handed circularly polarized feed network are compactly distributed on the upper and lower layers of the ground, facilitating the construction of a larger antenna array.

[0047] The third layer of metal layer is the ground of the antenna array, comprising eight square slots and a plurality of second metal via holes. The ground of the second layer is connected to the first layer of metal layer through the second metal via hole to construct a coplanar waveguide feed structure.

[0048] For the convenience of understanding, Figure 6 An exemplary simulation result diagram of an antenna device is provided for the embodiment of the utility model; as Figure 6 shown, Figure 6 (a) is the working frequency band of port 1 and port 2, Figure 6(b) impedance bandwidths for port 1 and port 2, specifically, when the first port (port 1) is excited, the dominant polarization of the antenna array is right-hand circularly polarized wave. When the second port (port 2) is excited, the dominant polarization of the antenna array is left-hand circularly polarized wave. The operating frequency band (|S11|<-10 decibel (dB)) of the right-hand circularly polarized port 1 is 16-20.2 gigahertz (GHz) and 27-33.5 GHz, and the 3-dB axial ratio bandwidth is 17.5-21.2 GHz and 26.4-30.6 GHz. The impedance bandwidth (|S22|<-10 dB) of the left-hand circularly polarized port 2 is 15.8-21.1 GHz and 26.4-32.9 GHz, and the 3-dB axial ratio bandwidth is 17.1-20.2 GHz and 27.2-34 GHz.

[0049] The K / Ka broadband dual circularly polarized antenna array in the embodiment of the utility model can realize broadband dual circular polarization in K frequency band and Ka frequency band, and has the advantages of low profile, compact structure and easy microwave circuit integration.

[0050] The scheme of the embodiment of the utility model can realize broadband dual circular polarization in K frequency band and Ka frequency band, adopts coplanar waveguide feeding line and orthogonal T-shaped branch to realize dual circular polarization performance, and expands the axial ratio bandwidth by introducing a grounding branch, realizes broadband dual circular polarization performance, adopts two-layer dielectric substrate, realizes dual circular polarization characteristics by changing the current path in the cut corner slot, has the advantage of low profile, and has a wider application range.

[0051] The embodiment of the utility model provides an electronic device which is provided with the antenna device 10 described in the above embodiment.

[0052] The above is only a specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. An antenna device, characterized by The antenna device comprises a first metal layer and a second metal layer in parallel; the first metal layer comprises a radiation structure and a right-handed circular polarization feed network; the second metal layer comprises a left-handed circular polarization feed network and a first metal via; the right-handed circular polarization feed network is connected with a horizontal input port of the radiation structure; the left-handed circular polarization feed network is connected with a vertical input port of the radiation structure through the first metal via.

2. The antenna device of claim 1, wherein, The radiation structure comprises a plurality of first-shaped radiation units; the first-shaped radiation unit comprises a coplanar waveguide feed line, a ground branch and a cut corner slot; a first part of the coplanar waveguide feed line is connected with the cut corner slot; a second part of the coplanar waveguide feed line is connected with the ground branch; the cut corner slot and the ground branch are in a diagonal relationship in the first shape.

3. The antenna device of claim 2, wherein, The first-shaped radiation unit further comprises a first T-shaped branch and a second T-shaped branch in quadrature; a first part of the first T-shaped branch is located between a first end of the first part of the coplanar waveguide feed line and a first end of the second part of the coplanar waveguide feed line; a second part of the first T-shaped branch is located between the first end of the first part of the coplanar waveguide feed line and a first end of the ground branch; a first part of the second T-shaped branch is located between a second end of the first part of the coplanar waveguide feed line and a second end of the second part of the coplanar waveguide feed line; a second part of the second T-shaped branch is located between the second end of the first part of the coplanar waveguide feed line and a second end of the ground branch.

4. The antenna device of claim 1, wherein, The antenna device further comprises a third metal layer; the third metal layer is located between the first metal layer and the second metal layer; the third metal layer is parallel to the first metal layer and the second metal layer respectively.

5. The antenna device of claim 4, wherein, The third metal layer comprises a second metal via and a first surface; the first surface is connected with the first metal layer through the second metal via.

6. The antenna device of claim 5, wherein, The third metal layer further comprises a square slot; the second metal via is arranged outside the square slot.

7. The antenna device of claim 6, wherein, The number of the square slots is the same as the number of the radiation units comprised by the radiation structure.

8. The antenna device of claim 1, wherein, The antenna device further comprises a first layer of dielectric substrate and a second layer of dielectric substrate in parallel; the first layer of dielectric substrate is perpendicular to the first metal layer, the second metal layer and the third metal layer; the second layer of dielectric substrate is perpendicular to the first metal layer, the second metal layer and the third metal layer.

9. The antenna device of claim 8, wherein, The first layer of dielectric substrate and the second layer of dielectric substrate are Roger 5880.

10. An electronic device, comprising: The electronic device comprises the antenna device of any one of claims 1-9.

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