Dual-polarized magnetoelectric dipole antenna and phased-array antenna

Abstract

The dual-polarized magnetoelectric dipole antenna comprises a grounding metal surface, a first radiation surface which is arranged on the grounding metal surface and comprises four first radiation sheets which are orthogonally arranged and are in central symmetry, and a feed assembly which comprises a first feed balun and a second feed balun, a first feed section of the first feed balun is coupled with two diagonally arranged first radiation sheets and is located above the first radiation surface, a second feed section of the first feed balun penetrates through the avoiding hole and is connected with the first feed section, and a third feed section of the second feed balun is coupled with the other two first radiation sheets and is located below the first radiation surface; and the third feed section of the second feed balun is connected with the fourth feed section. According to the dual-polarized magnetoelectric dipole antenna, the structure is compact, and high isolation degree can be achieved between two polarizations of the first radiating surface.

Description

Technical Field

[0001] The present invention relates to the technical field of communication engineering, and in particular to a dual-polarized magnetoelectric dipole antenna and a phased array antenna. Background Art

[0002] With the continuous development of communication technology, 5G millimeter wave communication has been widely studied by the industry due to its wide bandwidth, high data transmission rate and low latency. The globally recognized 5G millimeter wave frequency bands are 24.25-29.5GHz, 37-43.5GHz, 45.5-47GHz, 47.2-48.2GHz, and 66-71GHz. Therefore, it is urgent to design an antenna with as wide bandwidth as possible and covering 5G millimeter waves. Polarization diversity can increase system capacity. Dual-polarized millimeter wave antennas can accept electromagnetic waves of any polarization. Therefore, ±45° dual-polarized antennas are widely used in the communication field. The integration of millimeter wave systems is very high. Therefore, low-profile, easy-to-process and easy-to-chip integrated planar structure millimeter wave antennas have wide application value. Magnetoelectric dipole antennas are widely used in the field of mobile communications due to their wide bandwidth, wide and stable directional pattern and high gain. However, conventional millimeter wave magnetoelectric dipole antennas are large in size, not wide enough in bandwidth, and have a small coverage range for 5G millimeter wave frequency bands. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a dual-polarized magneto-electric dipole antenna with a compact structure, which can achieve high isolation between the two polarizations of the first radiation surface.

[0004] The present invention also proposes a phased array antenna having the dual-polarization magneto-electric dipole antenna.

[0005] According to the dual-polarized magnetoelectric dipole antenna of the embodiment of the first aspect of the present invention, the antenna comprises: a grounded metal surface; a first radiating surface, which is arranged on the grounded metal surface and comprises four first radiating plates which are arranged orthogonally and centrally symmetrically, a first conductive support is connected between the first radiating surface and the grounded metal surface, the first conductive support is respectively connected to the corresponding first radiating surface and the grounded metal surface, and a avoidance hole is provided on the first radiating plate; a feeding component, comprising: a first feeding balun and a second feeding balun, the first feeding balun comprises a first feeding segment and a second feeding segment, the first feeding segment is connected and coupled with two diagonally arranged first radiating plates, and the first feeding segment is located above the first radiating surface, the second feeding segment is penetrated through the avoidance hole and connected with the first feeding segment, the second feeding balun comprises a third feeding segment and a fourth feeding segment, the third feeding segment is coupled with the other two first radiating plates, the first feeding segment is located below the first radiating surface, and the fourth feeding segment is connected with the third feeding segment.

[0006] According to the dual-polarized magneto-electric dipole antenna of the present invention, the first feeding segment of the first feeding balun and the third feeding segment of the second feeding balun are respectively arranged on both sides of the first radiating surface without occupying the cross-sectional size, so that the structure of the first radiating surface is relatively compact, and the structure of the dual-polarized magneto-electric dipole antenna can be arranged relatively compactly, thereby realizing the miniaturized design of the dual-polarized magneto-electric dipole antenna. At the same time, the first radiating surface can constitute a physical barrier between the first feeding segment and the third feeding segment, so that the isolation between the two polarizations of the first radiating surface is relatively high.

[0007] According to some embodiments of the present invention, the dual-polarized magneto-electric dipole antenna also includes: a second radiating surface, arranged above the first radiating surface, the second radiating surface includes second radiating plates that are the same in number and correspond one to one to the first radiating plates, a second conductive support member is connected between the first radiating plates and the second radiating plates, and the first radiating plates and the second radiating plates are connected via the second conductive support member.

[0008] According to some embodiments of the present invention, the first radiation plate and the second radiation plate are coupled to each other.

[0009] According to some embodiments of the present invention, the first radiation sheet is connected to the second conductive support member by non-contact coupling; and / or the second radiation sheet is connected to the second conductive support member by non-contact coupling.

[0010] According to some embodiments of the present invention, the second conductive support member is a columnar metal member.

[0011] According to some embodiments of the present invention, the second conductive support member includes a supporting structure and a conductive strip line, the supporting structure is arranged between the first radiation plate and the second radiation plate and is used to support the second radiation plate, the conductive strip line is connected to the supporting structure and is respectively connected to the corresponding first radiation plate and the corresponding second radiation plate.

[0012] According to some embodiments of the present invention, the second radiation piece protrudes outward from the corresponding first radiation piece.

[0013] According to some embodiments of the present invention, four of the second radiation sheets are arranged to form an avoidance gap, and in a direction perpendicular to the first radiation surface, the first radiation sheet is opposite to the avoidance gap.

[0014] In some optional embodiments of the present invention, the dual-polarized magneto-electric dipole antenna further includes: a feeding microstrip line, wherein the two feeding microstrip lines are respectively connected to the first feeding balun and the second feeding balun, and the two feeding microstrip lines are both arranged on a side of the grounded metal surface away from the first radiating surface.

[0015] The phased array antenna according to the second embodiment of the present invention comprises: a plurality of dual-polarized magnetoelectric dipole antennas according to the first embodiment of the present invention.

[0016] According to the phased array antenna of the present invention, through the above-mentioned dual-polarized magnetoelectric dipole antenna, a wider bandwidth can be obtained and can be arranged more compactly, thereby improving the bandwidth coverage of the phased array antenna for the 5G millimeter wave frequency band, making the phased array antenna have a wider range of application and improving the overall performance of the phased array antenna.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 A schematic diagram of a dual-polarized magneto-electric dipole antenna provided for some embodiments of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of another perspective of the dual-polarized magneto-electric dipole antenna;

[0021] Figure 3 Schematic diagram of standing wave of dual-polarized magneto-electric dipole antenna;

[0022] Figure 4Schematic diagram of the isolation of the dual-polarized magneto-electric dipole antenna;

[0023] Figure 5 It is the 24GHz horizontal radiation pattern of the dual-polarized magneto-electric dipole antenna;

[0024] Figure 6 It is the 34GHz horizontal radiation pattern of the dual-polarized magneto-electric dipole antenna;

[0025] Figure 7 It is the 44GHz horizontal radiation pattern of the dual-polarized magneto-electric dipole antenna;

[0026] Figure 8 A comparison diagram of reflection coefficients of a dual-polarized magneto-electric dipole antenna with a second radiation plate and a dual-polarized magneto-electric dipole antenna without a second radiation plate provided for some embodiments of the present invention.

[0027] Reference numerals:

[0028] 100. Dual-polarized magneto-electric dipole antenna;

[0029] 1. Grounded metal surface;

[0030] 2. first radiation surface; 21. first radiation sheet; 211. avoidance hole;

[0031] 3. A first conductive metal housing;

[0032] 4. second radiation surface; 41. second radiation sheet; 42. avoidance gap;

[0033] 5. A second conductive metal housing;

[0034] 6. Feed assembly; 61. First feed balun; 611. First feed segment; 612. Second feed segment; 62. Second feed balun; 621. Third feed segment; 622. Fourth feed segment;

[0035] 7. Feed microstrip line. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] The dual-polarized magneto-electric dipole antenna 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0038] Reference Figure 1-Figure 8, the dual-polarized magnetic-electric dipole antenna 100 according to the embodiment of the first aspect of the present invention comprises a grounded metal surface 1, a first radiating surface 2, a first conductive support member 3 and a feeding assembly 6; the first radiating surface 2 is arranged on the grounded metal surface 1, and the first radiating surface 2 comprises four first radiating plates 21 arranged orthogonally and symmetrically at the center, a first conductive support member 3 is connected between the first radiating surface 2 and the grounded metal surface 1, the first conductive support member 3 is respectively connected to the corresponding first radiating surface 2 and the grounded metal surface 1, and an avoidance hole 211 is provided on the first radiating plate 21. For example, the first radiating plate 21 can be a rectangular metal plate. For example, the first conductive metal plate 3 can be directly electrically connected to the corresponding first radiating surface 2, or the first conductive metal plate 3 can be non-contact coupled connected to the corresponding first radiating surface 2; for example, the grounded metal surface 1 can be directly electrically connected to the corresponding first radiating surface 2, or the grounded metal surface 1 can be non-contact coupled connected to the corresponding first radiating surface 2.

[0039] The feeding component 6 includes: a first feeding balun 61 and a second feeding balun 62 . The first feeding balun 61 is coupled to two first radiation plates 21 arranged diagonally, and the second feeding balun 62 is coupled to the other two first radiation plates 21 .

[0040] By setting a first conductive support member 3 to connect the first radiation plate 21 and the grounded metal surface 1, the two first radiation plates 21 set diagonally can form a magnetic electric dipole, so that the first radiation surface 2 can have two pairs of dual-polarized electric dipoles arranged at ±45°, thereby improving the impedance bandwidth of the first radiation surface 2 and making the first radiation surface 2 have better signal receiving and transmitting performance.

[0041] The first feeding balun 61 includes a first feeding segment 611 and a second feeding segment 612, the first feeding segment 611 is located above the two first radiation plates 21, the second feeding segment 612 is passed through the avoidance hole 211, and the second feeding segment 612 is connected to the first feeding segment 611; for example, the first feeding segment 611 can be directly electrically connected to the corresponding two first radiation plates 21, and the first feeding segment 611 can be non-contact coupled connected to the corresponding two first radiation plates 21.

[0042] The second feeding balun 62 includes a third feeding section 621 and a fourth feeding section 622, wherein the third feeding section 621 is located below the two first radiation plates 21, and the fourth feeding section 622 is connected to the third feeding section 621. For example, the second feeding section 612 may be directly electrically connected to the corresponding two first radiation plates 21, and the second feeding section 612 may be non-contact coupled connected to the corresponding two first radiation plates 21.

[0043] Compared with the assembly scheme of setting the first feeding section 611 and the third feeding section 621 in the gap between two adjacent first radiation plates 21, the first feeding section 611 and the third feeding section 621 are respectively set on both sides of the first radiation surface 2, which does not occupy the cross-sectional size, makes the structure of the first radiation surface 2 more compact, and makes the structure of the dual-polarized magneto-electric dipole antenna 100 more compact, realizing the miniaturized design of the dual-polarized magneto-electric dipole antenna 100. At the same time, the first radiation surface 2 can constitute a physical barrier between the first feeding section 611 and the third feeding section 621, so that the isolation between the two polarizations of the first radiation surface 2 is higher. Figure 4 , the isolation of the dual-polarized magneto-electric dipole antenna 100 can reach below -27 dB.

[0044] Reference Figure 1-Figure 2 According to some embodiments of the present invention, the dual-polarized magnetic electric dipole antenna 100 further includes a second radiating surface 4, which is disposed above the first radiating surface 2, and includes second radiating plates 41 which are the same in number and correspond to the first radiating plates 21, and a second conductive support member 5 is connected between the first radiating plates 21 and the second radiating plates 41, and the first radiating plates 21 and the second radiating plates 41 are connected via the second conductive support member 5. In this way, the bandwidth of the polarized magnetic electric dipole antenna 100 can be improved.

[0045] Reference Figure 8 When the dual-polarized magneto-electric dipole antenna 100 is working, since the first radiating surface 2 and the second radiating surface 4 are connected by the second metal support, the first radiating plate 21 and the second radiating plate 41 are close to each other and can be coupled with each other. The first radiating surface 2 and the second radiating surface 4 work together to generate a low-frequency resonance point, thereby widening the bandwidth and improving the bandwidth coverage of the dual-polarized magneto-electric dipole antenna 100 for the 5G millimeter wave frequency band.

[0046] Reference Figure 3 , the standing waves of the two polarizations of the dual-polarized magnetoelectric dipole antenna 100 are both less than 1.8. Figure 5 , Figure 6 and Figure 7 The dual-polarized magneto-electric dipole antenna 100 has a high isolation and a stable directional pattern. The dual-polarized magneto-electric dipole antenna 100 has a wide frequency band. Figure 1 The consistency is high, so that the dual-polarized magneto-electric dipole antenna 100 can be better applied in the field of millimeter-wave phased array antennas.

[0047] Reference Figure 1 and Figure 2According to some embodiments of the present invention, the first radiation plate 21 and the second radiation plate 41 are coupled to each other. In this way, the first radiation plate 21 can supply energy to the second radiation plate 41, reduce the size of the second radiation plate 41, reduce the size of the second radiation surface 4, and thus reduce the size of the dual-polarized magnetic electric dipole antenna 100, and more effectively realize the miniaturization design of the dual-polarized magnetic electric dipole antenna 100.

[0048] Reference Figure 1 and Figure 2 According to some embodiments of the present invention, the second conductive support member 5 is a columnar metal member. For example, the second conductive support member 5 may be a copper column or an aluminum column. The columnar metal member can realize the electrical connection between the first radiation sheet 21 and the second radiation sheet 41, and has a high structural strength. Therefore, the second conductive support member 5 is set as a columnar metal member, which can make the structure of the second conductive support member 5 simpler.

[0049] Reference Figure 1 and Figure 2 In some embodiments of the present invention, there are multiple second conductive support members 5, and the multiple second conductive support members 5 are arranged in a non-linear manner. For example, there may be three second conductive support members 5 arranged in a triangular shape. In this way, a better supporting effect can be produced on the second radiation sheet 41 by multiple second conductive support members 5, so that the relative position of the second radiation sheet 41 relative to the grounded metal is fixed and reliable, effectively ensuring the signal receiving and transmitting performance of the second radiation surface 4, improving the reliability of the second radiation surface 4, and improving the reliability of the dual-polarized magnetic electric dipole antenna 100.

[0050] According to some optional embodiments of the present invention, the second conductive support member 5 includes a support structure and a conductive strip line, the support structure is disposed between the first radiation sheet 21 and the second radiation sheet 41, and the support structure is used to support the second radiation sheet 41, for example, the support structure may be a plastic part, a rubber part or a wooden part, the conductive strip line is connected to the support structure, and the conductive strip line is respectively connected to the corresponding first radiation sheet 21 and the corresponding second radiation sheet 41. Optionally, the support structure may be a circuit board, and the conductive strip line is a metal line engraved on the circuit board.

[0051] In this way, there are fewer metal parts between the second radiation plate 41 and the first radiation plate 21, reducing the influence of the second conductive support member 5 on the transceiver performance of the first radiation surface 2, reducing the influence of the second conductive support member 5 on the transceiver performance of the second radiation surface 4, so that both the first radiation surface 2 and the second radiation surface 4 can work reliably, thereby improving the reliability of the dual-polarized magnetic electric dipole antenna 100.

[0052] Reference Figure 1 and Figure 2According to some optional embodiments of the present invention, the projection of the first radiation surface 2 on the projection surface is located within the projection range of the grounded metal surface 1 on the projection surface; wherein the projection surface is parallel to the first radiation surface 2. In this way, the transceiver performance of the first radiation surface 2 can be guaranteed, so that the first radiation surface 2 works reliably.

[0053] Reference Figure 1 and Figure 2 According to some optional embodiments of the present invention, the projection of the second radiation surface 4 on the projection surface is located within the projection range of the grounded metal surface 1 on the projection surface; wherein the projection surface is parallel to the first radiation surface 2. In this way, the transceiver performance of the second radiation surface 4 can be guaranteed, and the second radiation surface 4 can work reliably.

[0054] Reference Figure 1 and Figure 2 In some optional embodiments of the present invention, the first conductive support member 3 is a columnar structure, for example, the second conductive support member 5 can be a copper column or an aluminum column. The columnar metal member can realize the electrical connection between the first radiation sheet 21 and the second radiation sheet 41, and has a high structural strength. Therefore, the first conductive support member 3 is set as a columnar metal member, which can make the structure of the first conductive support member 3 simpler.

[0055] There are multiple first conductive support members 3, and the multiple first conductive support members 3 are arranged in a non-linear manner; for example, there may be three first conductive support members 3 arranged in a triangle; there may be two first conductive support members 3, and the connection line of the two first conductive support members 3 intersects with the connection line between the corresponding radiation patches. In this way, the multiple first conductive support members 3 can produce a better support effect on the second radiation patch 41, so that the relative position of the first radiation patch 21 relative to the grounded metal is fixed and reliable, effectively ensuring the signal receiving and transmitting performance of the first radiation surface 2, improving the reliability of the first radiation surface 2, and improving the reliability of the dual-polarized magnetic electric dipole antenna 100.

[0056] Reference Figure 1 and Figure 2 In some optional embodiments of the present invention, the dual-polarized magneto-electric dipole antenna 100 further includes: a feeding microstrip line 7, wherein the number of the feeding microstrip lines 7 is two, and the two feeding microstrip lines 7 are respectively connected to the first feeding balun 61 and the second feeding balun 62, and the two feeding microstrip lines 7 are both arranged on the side of the grounded metal surface 1 away from the first radiation surface 2. In this way, the influence of the feeding microstrip line 7 on the transceiver performance of the first radiation surface 2 can be effectively reduced, the reliability of the first radiation surface 2 can be ensured, the influence of the feeding microstrip line 7 on the transceiver performance of the second radiation surface 4 can be reduced, the reliability of the second radiation surface 4 can be ensured, and the reliability of the dual-polarized magneto-electric dipole antenna 100 can be improved.

[0057] The phased array antenna according to the second embodiment of the present invention comprises: a plurality of dual-polarized magneto-electric dipole antennas 100 according to the first embodiment of the present invention.

[0058] According to the phased array antenna of the present invention, through the above-mentioned dual-polarized magnetoelectric dipole antenna 100, a wider bandwidth can be obtained and can be arranged more compactly, thereby improving the bandwidth coverage of the phased array antenna for the 5G millimeter wave frequency band, making the phased array antenna have a wider range of application and improving the overall performance of the phased array antenna.

[0059] In the description of the present invention, it is to be understood that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0062] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A dual-polarized magneto-electric dipole antenna, characterized in that: include: Grounded metal surface; A first radiation surface, provided on the grounded metal surface and comprising four first radiation plates arranged orthogonally and centrally symmetrically, a first conductive support member is connected between the first radiation surface and the grounded metal surface, the first conductive support member is respectively connected to the corresponding first radiation surface and the grounded metal surface, and a avoidance hole is opened on the first radiation plate; A feeding component includes: a first feeding balun and a second feeding balun, wherein the first feeding balun includes a first feeding segment and a second feeding segment, wherein the first feeding segment is coupled with two diagonally arranged first radiating plates, and the first feeding segment is located above the first radiating surface, the second feeding segment is passed through the avoidance hole and connected to the first feeding segment, and the second feeding balun includes a third feeding segment and a fourth feeding segment, wherein the third feeding segment is coupled with the other two first radiating plates, and the third feeding segment is located below the first radiating surface, and the fourth feeding segment is connected to the third feeding segment.

2. The dual-polarized magneto-electric dipole antenna according to claim 1, characterized in that: It also includes: a second radiation surface, arranged above the first radiation surface, the second radiation surface includes second radiation plates that are the same in number and correspond one to one with the first radiation plates, a second conductive support member is connected between the first radiation plates and the second radiation plates, and the first radiation plates and the second radiation plates are connected through the second conductive support member.

3. The dual-polarized magneto-electric dipole antenna according to claim 2, characterized in that: The first radiation plate and the second radiation plate are coupled to each other.

4. The dual-polarized magneto-electric dipole antenna according to claim 2, characterized in that: The second conductive support member is a columnar metal member.

5. The dual-polarized magneto-electric dipole antenna according to claim 2, characterized in that: The second conductive support member includes a support structure and a conductive strip line. The support structure is arranged between the first radiation plate and the second radiation plate and is used to support the second radiation plate. The conductive strip line is connected to the support structure and is respectively connected to the corresponding first radiation plate and the corresponding second radiation plate.

6. The dual-polarized magneto-electric dipole antenna according to claim 2, characterized in that: The second radiation piece protrudes outward from the corresponding first radiation piece.

7. The dual-polarized magneto-electric dipole antenna according to claim 2, characterized in that: The four second radiation plates are arranged to form an avoidance gap, and in a direction perpendicular to the first radiation surface, the first radiation plate is opposite to the avoidance gap.

8. The dual-polarized magneto-electric dipole antenna according to claim 1, characterized in that: It also includes: a feeding microstrip line, wherein the number of the feeding microstrip lines is two and the feeding microstrip lines are respectively connected to the first feeding balun and the second feeding balun, and the two feeding microstrip lines are both arranged on a side of the grounded metal surface away from the first radiation surface.

9. A phased array antenna, characterized in that: include: A plurality of dual-polarized magneto-electric dipole antennas according to any one of claims 1 to 8.

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