MIMO dielectric resonator antenna based on pattern decoupling

Abstract

The present invention discloses a MIMO dielectric resonator antenna based on pattern decoupling, comprising a dielectric substrate, a first dielectric antenna and a second dielectric antenna, wherein the first dielectric antenna and the second dielectric antenna are mounted on the dielectric substrate, the first dielectric antenna is bonded to the second dielectric antenna, the first dielectric antenna and the second dielectric antenna are respectively bonded to the sides of the first dielectric antenna and the second dielectric antenna, or a third metal strip is provided on the bonding surface between the first dielectric antenna and the second dielectric antenna. The present invention realizes pattern decoupling between the first dielectric antenna and the second dielectric antenna by setting the first metal strip, the second metal strip or the third metal strip as a decoupling structure, which is beneficial to reducing the energy loss generated by the application of the antenna in the MIMO system; the first dielectric antenna and the second dielectric antenna are tightly bonded, the antenna spacing is small, and the space utilization rate is high, which is beneficial to arrange the antenna in a compact space. The present invention is widely used in the field of antenna technology.

Description

Technical Field

[0001] The invention relates to the technical field of antennas, and in particular to a MIMO dielectric resonator antenna based on pattern decoupling. Background Art

[0002] MIMO (Multiple Input Multiple Output) systems use multiple antennas for communication, which can effectively increase data transmission rate and channel capacity, and have been widely used in contemporary wireless communication systems. However, the mutual coupling between different antennas in the MIMO system will deteriorate antenna performance and reduce the communication carrying capacity of the system. For antennas in the MIMO system, mutual coupling is reflected in the deterioration of isolation and increase of correlation between antenna ports. In particular, the antenna pattern will also be distorted due to mutual coupling.

[0003] The decoupling technology used in the related art is mainly port-to-port decoupling technology, of which there are two mainstream technical routes. One is to block the coupling energy between antenna ports to avoid port-to-port coupling; the other is to build additional coupling paths between ports so that the electromagnetic energy coupled between ports is superimposed and canceled through different paths, thereby avoiding port-to-port coupling. The core of these related technologies is decoupling between antenna ports, that is, only the isolation between antenna ports can be guaranteed, but the distortion and deformation of the antenna pattern caused by coupling have not been solved. When the antenna using the related technology is applied to the process of communication between the terminal device and the base station, in order to cope with the influence on the antenna pattern, it is necessary to increase additional transmission power, thereby increasing the energy loss of the system. On the other hand, the port-to-port decoupling structure used in the related technology includes periodic structures and decoupling networks, etc., which are often very complex in design, resulting in a large space occupation, making the antenna spacing larger, thereby reducing the overall integration of the system and low space utilization. Summary of the invention

[0004] In view of at least one of the above technical problems, an object of the present invention is to provide a MIMO dielectric resonator antenna based on pattern decoupling.

[0005] On the one hand, an embodiment of the present invention includes a MIMO dielectric resonator antenna based on directional pattern H-plane decoupling, including:

[0006] On the other hand, an embodiment of the present invention further includes a MIMO dielectric resonator antenna based on E-plane decoupling of a directional pattern, comprising:

[0007] The beneficial effects of the present invention are as follows: the MIMO dielectric resonator antenna based on H-plane decoupling of the directional pattern in the embodiment realizes H-plane decoupling of the directional pattern between the first dielectric antenna and the second dielectric antenna by setting the first metal strip and the second metal strip as a decoupling structure; the MIMO dielectric resonator antenna based on E-plane decoupling of the directional pattern realizes E-plane decoupling of the directional pattern between the first dielectric antenna and the second dielectric antenna by setting the third metal strip as a decoupling structure, and the well-shaped directional pattern is conducive to reducing the energy loss generated by the application of the antenna in the MIMO system; moreover, the first dielectric antenna and the second dielectric antenna in the MIMO dielectric resonator antenna based on directional pattern decoupling in the embodiment can be tightly fitted, the antenna spacing is small, the space utilization rate is high, and it is conducive to arranging the antenna in a compact space. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is an overall structural diagram of a MIMO dielectric resonator antenna based on H-plane decoupling of a directional pattern in an embodiment;

[0009] Figure 2 It is a structural diagram of a MIMO dielectric resonator antenna based on H-plane decoupling of a directional pattern in an embodiment viewed from a second side surface;

[0010] Figure 3 It is a structural diagram of a MIMO dielectric resonator antenna based on H-plane decoupling of a directional pattern in an embodiment viewed from the second surface;

[0011] Figure 4 It is a structural diagram of a MIMO dielectric resonator antenna based on H-plane decoupling of a directional pattern in an embodiment viewed from the first side;

[0012] Figure 5 It is a working principle diagram of the MIMO dielectric resonator antenna based on H-plane decoupling of the directional pattern in the embodiment;

[0013] Figure 6 Schematic diagram of measured and simulated S-parameter results of a MIMO dielectric resonator antenna based on H-plane decoupling of a directional pattern in an embodiment;

[0014] Figure 7 It is a schematic diagram comparing the measured and simulated antenna radiation patterns of the MIMO dielectric resonator antenna based on H-plane decoupling of the pattern at 4.93 GHz in the embodiment;

[0015] Figure 8 Schematic diagram of comparison between measured and simulated antenna gain of a MIMO dielectric resonator antenna based on H-plane decoupling of a directional pattern in an embodiment;

[0016] Fig. 9 A schematic diagram showing a comparison of the radiation efficiency of a MIMO dielectric resonator antenna measured and simulated based on H-plane decoupling of the directional pattern in an embodiment;

[0017] Fig.10 Schematic diagram of measured and simulated antenna envelope correlation coefficients of a MIMO dielectric resonator antenna based on H-plane decoupling of a directional pattern in an embodiment;

[0018] Fig.11 It is an overall structural diagram of a MIMO dielectric resonator antenna based on E-plane decoupling of a directional pattern in an embodiment;

[0019] Fig.12 It is a structural diagram of a MIMO dielectric resonator antenna based on E-plane decoupling of a directional pattern in an embodiment viewed from a second side surface;

[0020] Fig.13 It is a structural diagram of a MIMO dielectric resonator antenna based on E-plane decoupling of a directional pattern in an embodiment viewed from the second surface;

[0021] Fig.14 It is a structural diagram of a MIMO dielectric resonator antenna based on E-plane decoupling of a directional pattern in an embodiment viewed from the first side;

[0022] Fig.15 It is a working principle diagram of the MIMO dielectric resonator antenna based on E-plane decoupling of the directional pattern in the embodiment;

[0023] Fig.16 Schematic diagram of measured and simulated S-parameter results of a MIMO dielectric resonator antenna based on E-plane decoupling of a directional pattern in an embodiment;

[0024] Fig.17 It is a schematic diagram comparing the measured and simulated antenna radiation patterns of the MIMO dielectric resonator antenna based on E-plane decoupling of the pattern at 4.93 GHz in the embodiment;

[0025] Fig.18 Schematic diagram of comparison between measured and simulated antenna gain of a MIMO dielectric resonator antenna based on E-plane decoupling of a directional pattern in an embodiment;

[0026] Fig.19 Schematic diagram of comparison of radiation efficiency of a MIMO dielectric resonator antenna measured and simulated based on E-plane decoupling of the directional pattern in the embodiment;

[0027] Fig. 20 Schematic diagram of measured and simulated antenna envelope correlation coefficients of a MIMO dielectric resonator antenna based on E-plane decoupling of the directional pattern in an embodiment. DETAILED DESCRIPTION

[0028] In this embodiment, a MIMO dielectric resonator antenna based on directional pattern decoupling is introduced from two aspects, one of which is a MIMO dielectric resonator antenna based on directional pattern H-plane decoupling, and the other is a MIMO dielectric resonator antenna based on directional pattern E-plane decoupling.

[0029] The structure of the MIMO dielectric resonator antenna based on the H-plane decoupling of the directional pattern is as follows: Figure 1-4 See Figure 1 The MIMO dielectric resonator antenna based on the H-plane decoupling of the directional pattern includes a dielectric substrate, a first dielectric antenna, a second dielectric antenna, a first metal strip and a second metal strip. The material used for the dielectric substrate is Rogers 4003c. The dielectric substrate includes a first surface and a second surface. Figure 1 and Figure 2 The side of the dielectric substrate shown facing upwards, Figure 4 The side of the dielectric substrate shown is the first side. Figure 3 The side of the dielectric substrate shown is the reverse side of the first side, that is, the second side.

[0030] Reference Figure 1 and Figure 2 The first dielectric antenna and the second dielectric antenna are rectangular parallelepipeds of the same size, so the first dielectric antenna and the second dielectric antenna respectively have a bottom surface, a top surface and four side surfaces, wherein the bottom surface of the first dielectric antenna and the bottom surface of the second dielectric antenna are in contact with the first surface of the dielectric substrate, so that the first dielectric antenna and the second dielectric antenna are connected to the dielectric substrate, and the first dielectric antenna and the second dielectric antenna are installed on the dielectric substrate.

[0031] The first side surface of the first dielectric antenna and the first side surface of the second dielectric antenna are completely attached, wherein the first side surface of the first dielectric antenna and the first side surface of the second dielectric antenna have the same length and width, and the complete attachment means that the long sides and the wide sides of the first side surface of the first dielectric antenna and the first side surface of the second dielectric antenna are completely overlapped, and the first side surface of the first dielectric antenna and the first side surface of the second dielectric antenna can be glued together, so that the distance between the first side surface of the first dielectric antenna and the first side surface of the second dielectric antenna is 0. After attachment, the first side surface of the first dielectric antenna and the first side surface of the second dielectric antenna are in the same plane, and the plane is the attachment surface.

[0032] Reference Figure 1 and Figure 2 The first metal strip and the second metal strip used are both in the shape of an H. Since the first dielectric antenna and the second dielectric antenna have the same size and fit seamlessly, although Figure 1 and Figure 2 The bonding surface is not shown in the figure, but it is still easy to understand that the bonding surface is located at Figure 1 or Figure 2The first dielectric antenna and the second dielectric antenna are in the middle of the rectangular body. After the first dielectric antenna and the second dielectric antenna are seamlessly fitted, Figure 2 The side of the first dielectric antenna seen in FIG. 1 is the second side of the first dielectric antenna. Figure 2 The side of the second dielectric antenna seen in the figure is the second side of the second dielectric antenna, the second side of the first dielectric antenna and the second side of the second dielectric antenna are located in the same plane, and it is easy to understand the boundary between the second side of the first dielectric antenna and the second side of the second dielectric antenna, that is, Figure 2 The left and right middle dividing line of the rectangular side is an edge of the bonding surface. Figure 2 The left and right middle dividing lines of the overall side of the rectangular parallelepiped seen in the figure coincide with one edge of the bonding surface, the part above the middle horizontal bar of the "H" is attached to the second side of the first dielectric antenna, and the part below the middle horizontal bar of the "H" is attached to the second side of the second dielectric antenna.

[0033] In the first dielectric antenna, the side opposite to the second side is the third side; in the second dielectric antenna, the side opposite to the second side is the third side. After the first dielectric antenna and the second dielectric antenna are seamlessly fitted, the third side of the first dielectric antenna and the third side of the second dielectric antenna are located in the same plane, and it is easy to understand that the boundary between the third side of the first dielectric antenna and the third side of the second dielectric antenna is an edge of the fitting surface. Figure 1 The second metal strip is symmetrically arranged with the first metal strip. In the H-shaped second metal strip, the middle horizontal bar of the "H" coincides with an edge of the bonding surface, the part above the middle horizontal bar of the "H" is attached to the third side surface of the first dielectric antenna, and the part below the middle horizontal bar of the "H" is attached to the third side surface of the second dielectric antenna.

[0034] Reference Figure 1 and Figure 4The MIMO dielectric resonator antenna based on the H-plane decoupling of the directional pattern is also provided with a first microstrip line, a second microstrip line, a first coaxial connector and a second coaxial connector. Among them, the first microstrip line and the second microstrip line are both arranged on the first surface of the dielectric substrate, and the first microstrip line and the second microstrip line can be made by using a printed circuit process. The first coaxial connector and the second coaxial connector are both installed at the edge of the dielectric substrate, one end of the first microstrip line is connected to the first coaxial connector, and one end of the second microstrip line is connected to the second coaxial connector. The first microstrip line starts from the edge of the dielectric substrate, that is, the connection point with the first coaxial connector, and extends to the bottom of the first dielectric antenna in a direction parallel to the bonding surface, and may not extend outside the first dielectric antenna; the second microstrip line starts from the edge of the dielectric substrate, that is, the connection point with the second coaxial connector, and extends to the bottom of the second dielectric antenna in a direction parallel to the bonding surface, and may not extend outside the second dielectric antenna. The extension direction of the first microstrip line and the extension direction of the second microstrip line are both parallel to the bonding surface, that is, the first microstrip line and the second microstrip line are parallel. Moreover, the first microstrip line and the second microstrip line are symmetrical about the bonding surface, that is, if the bonding surface is regarded as a mirror surface, the first microstrip line and the second microstrip line are in a mirror image relationship.

[0035] Reference Figure 3 , a metal ground is provided on the second surface of the dielectric substrate; the metal ground is provided with a first gap and a second gap. Specifically, a metal material covering the entire second surface of the dielectric substrate can be made on the second surface of the dielectric substrate by using a process such as electroplating, thereby forming the metal ground, and then a method such as corrosion is used to remove the metal material at the position where the first gap and the second gap are located, thereby forming the first gap and the second gap.

[0036] Reference Figure 3 and Figure 4 The spatial projection of the first slot on the first surface intersects the first microstrip line perpendicularly, and the spatial projection of the second slot on the first surface intersects the second microstrip line perpendicularly.

[0037] When using a MIMO dielectric resonator antenna based on H-plane decoupling of the directional pattern, the whole consisting of the first coaxial connector, the first microstrip line, the first dielectric antenna and the first slot can be regarded as an antenna in the MIMO system, and an external device is connected to the first coaxial connector to use the antenna; the whole consisting of the second coaxial connector, the second microstrip line, the second dielectric antenna and the second slot can be regarded as another antenna in the MIMO system, and an external device is connected to the second coaxial connector to use the antenna.

[0038] The working principle of the MIMO dielectric resonator antenna based on H-plane decoupling of the directional pattern is as follows: Figure 5 shown. Figure 5(a) is a structure in which the first metal strip and the second metal strip are removed from the MIMO dielectric resonator antenna based on H-plane decoupling of the directional pattern in this embodiment, and the electric field distribution caused by this structure. Figure 5 (b) is the structure of the MIMO dielectric resonator antenna based on H-plane decoupling of the directional pattern provided with the first metal strip and the second metal strip in this embodiment, and the electric field distribution brought about by the first metal strip and the second metal strip as a decoupling structure. Figure 5 As shown in (a), in the absence of the first metal strip and the second metal strip, when the first dielectric antenna is excited by the first slot and the second dielectric antenna is loaded with a 50 ohm resistor, the first dielectric antenna and the second dielectric antenna operate in the high-order mode. The high-order mode exists in the dielectric antenna formed by the first dielectric antenna and the second dielectric antenna, so the isolation between the first dielectric antenna and the second dielectric antenna will be sharply deteriorated. At the same time, since the electric field of the high-order mode is distributed in the first dielectric antenna and the second dielectric antenna with equal amplitude and opposite phase, the radiation pattern of the first dielectric antenna is distorted. Figure 5 (b) shows the electric field distribution in the first dielectric antenna and the second dielectric antenna under the excitation of the decoupling structure, i.e., the first metal strip and the second metal strip. Figure 5 As shown in (b), the electric field distribution in the first dielectric antenna and the second dielectric antenna is equal in amplitude and phase. Based on the superposition principle, the electric field distribution in the MIMO dielectric resonator antenna based on the H-plane decoupling of the directional pattern in this embodiment is Figure 5 (a) The electric field and Figure 5 (b) shows the superposition of the electric fields. The electric field distribution is as follows: Figure 5 (c) as shown. Figure 5 In (c), the electric field in the first dielectric antenna is not affected, while there is almost no electric field energy distribution in the second dielectric antenna. The first dielectric antenna operates in its fundamental mode. In this case, the first dielectric antenna and the second dielectric antenna achieve directional pattern decoupling while also having good port isolation.

[0039] In this embodiment, the dimensions of the various components in the MIMO dielectric resonator antenna based on the H-plane decoupling of the directional pattern are marked on Figure 1-4 The values ​​of these dimensions are set as follows: a = 46, b = 23, h = 7.2, l1 = 10, w1 = 1.8, l2 = 4.7, w2 = 0.5, l3 = 2.7, w3 = 0.2, t s =1.524,l s =15,w s =2, l g =73,w g=50, l4=30, w4=3.6, d1=0.8, the above numerical units are all millimeters. With the above dimensions, the MIMO dielectric resonator antenna based on H-plane decoupling of the directional pattern is measured and simulated. Specifically, a MIMO dielectric resonator antenna based on H-plane decoupling of the directional pattern with the above structure and parameters is established in a computer, and the first coaxial connector is used as port 1 and the second coaxial connector is used as port 2 for simulation; the first coaxial connector in the MIMO dielectric resonator antenna based on H-plane decoupling of the directional pattern is connected to the test instrument as port 1 and the second coaxial connector as port 2 for measurement. The simulation and measured results are shown in the figure below. Figure 6-10 shown.

[0040] Figure 6 The following is a schematic diagram of the measured and simulated S parameter results. Figure 6 As shown, the measured results are in good agreement with the simulation results. The measured and simulated 10dB impedance bandwidths are 7.9% (4.74–5.13GHz) and 7.2% (4.72–5.07GHz), respectively. The measured results have a frequency offset of about 1% relative to the simulation results. This frequency offset is caused by errors in the antenna processing process. At the same time, there is a certain air gap between the dielectric substrate and the first dielectric antenna and the second dielectric antenna, which will also cause a certain degree of frequency offset. Figure 6 The comparison between the measured and simulated antenna port isolation can also be seen in the figure. The measured port isolation is greater than 20.6dB in the 4.8–5GHz frequency band. Due to the symmetry of the antenna structure, the simulated |S 11 |with|S 22 |The curve has a consistent trend.

[0041] Figure 7 The figure shows the comparison of the measured and simulated antenna radiation patterns at 4.9 GHz. Figure 7 As shown in the figure, the antenna has good directional radiation characteristics, and the maximum radiation direction of the antenna is at the z-axis, and the symmetry of the radiation pattern is good. The cross polarization of the E-plane and H-plane of the antenna is 16dB and 12.5dB at + / -30° respectively. The measured cross polarization is slightly higher than the simulation. Figure 7 (a) The measured directivity diagram of port 1 is shown in Figure 1. Figure 7 (b) The measured radiation pattern of port 2 shows good consistency.

[0042] Figure 8 The figure shows the comparison between the measured and simulated antenna gain. Figure 8 As shown in the figure, the measured antenna gain varies from 2.04 to 3.76 dB in the 4.8–5.0 GHz frequency band. There is a 0.25 dB inconsistency between the two ports of the antenna. This may be due to a certain error in the alignment between the antenna under test and the standard antenna during the measurement process.

[0043] Fig. 9 The figure shows the comparison between the measured and simulated antenna radiation efficiency. Fig. 9 As shown, the antenna efficiency varies from 82.7% to 98.2% within the operating frequency band.

[0044] Fig.10 The figure shows the measured and simulated antenna envelope correlation coefficients. The simulation results of this coefficient can be directly extracted from the software. The measured envelope correlation coefficient is obtained by integrating the directional pattern between the two ports. Fig.10 It can be seen that within the designed frequency band, the envelope correlation coefficients are all less than 0.059, which meets the requirement that the antenna correlation coefficient is less than 0.5 in the MIMO system, indicating that the designed antenna has good spatial multiplexing capability.

[0045] pass Figure 6-10 From the measured and simulated results shown, it can be seen that the directional patterns of the two ports of the MIMO dielectric resonator antenna based on the directional pattern H-plane decoupling maintain a good shape, which can achieve a good decoupling effect, and also has additional effects such as better spatial multiplexing capability.

[0046] The structure of the MIMO dielectric resonator antenna based on E-plane decoupling of the directional pattern is as follows: Figure 11-14 As shown. The structure of the MIMO dielectric resonator antenna based on E-plane decoupling of the directional pattern is similar to the structure of the MIMO dielectric resonator antenna based on H-plane decoupling of the directional pattern, and still includes a dielectric substrate, a first dielectric antenna and a second dielectric antenna, and the first dielectric antenna and the second dielectric antenna are also bonded in the same way. However, the MIMO dielectric resonator antenna based on E-plane decoupling of the directional pattern may not include the first metal strip and the second metal strip. The MIMO dielectric resonator antenna based on E-plane decoupling of the directional pattern includes a third metal strip, and the third metal strip is located at the bonding surface. Specifically, when bonding the first dielectric antenna and the second dielectric antenna, the third metal strip can be bonded between the first dielectric antenna and the second dielectric antenna.

[0047] The shape of the third metal strip is also H-shaped. Fig.12 When the dielectric substrate is placed horizontally and viewed from an angle perpendicular to the bonding surface, the shape of the third metal strip is a horizontal "H", and the openings at both ends of the "H" can be closed.

[0048] Reference Fig.11 and Fig.14The MIMO dielectric resonator antenna based on the E-plane decoupling of the directional diagram is also provided with a third microstrip line, a fourth microstrip line, a third coaxial connector and a fourth coaxial connector. Among them, the third microstrip line and the fourth microstrip line are both arranged on the first surface of the dielectric substrate, and the third microstrip line and the fourth microstrip line can be made using a printed circuit process. The third coaxial connector and the fourth coaxial connector are both installed at the edge of the dielectric substrate, one end of the third microstrip line is connected to the third coaxial connector, and one end of the fourth microstrip line is connected to the fourth coaxial connector. The third microstrip line starts from the edge of the dielectric substrate, that is, the connection point with the third coaxial connector, and extends to the bottom of the first dielectric antenna in a direction parallel to the bonding surface, and may not extend outside the first dielectric antenna; the fourth microstrip line starts from the edge of the dielectric substrate, that is, the connection point with the fourth coaxial connector, and extends to the bottom of the second dielectric antenna in a direction parallel to the bonding surface, and may not extend outside the second dielectric antenna. The extension direction of the third microstrip line and the extension direction of the fourth microstrip line are both perpendicular to the bonding surface, and if the third microstrip line and the fourth microstrip line continue to extend, the third microstrip line and the fourth microstrip line will be connected to form a straight line. Moreover, the third microstrip line and the fourth microstrip line are symmetrical about the bonding surface, that is, if the bonding surface is regarded as a mirror surface, the third microstrip line and the fourth microstrip line are in a mirror relationship.

[0049] Reference Fig.13 , a metal ground is provided on the second surface of the dielectric substrate; the metal ground is provided with a third gap and a fourth gap. Specifically, a metal material covering the entire second surface of the dielectric substrate can be made on the second surface of the dielectric substrate by using a process such as electroplating, thereby forming the metal ground, and then a method such as corrosion is used to remove the metal material at the position where the third gap and the fourth gap are located, thereby forming the third gap and the fourth gap.

[0050] Reference Fig.13 and Fig.14 , the spatial projection of the third slot on the first surface intersects the third microstrip line perpendicularly, and the spatial projection of the fourth slot on the first surface intersects the fourth microstrip line perpendicularly.

[0051] When using a MIMO dielectric resonator antenna based on E-plane decoupling of the directional pattern, the whole consisting of the third coaxial connector, the third microstrip line, the third dielectric antenna and the third slot can be regarded as an antenna in the MIMO system, and an external device can be connected to the third coaxial connector to use the antenna; the whole consisting of the fourth coaxial connector, the fourth microstrip line, the fourth dielectric antenna and the fourth slot can be regarded as another antenna in the MIMO system, and an external device can be connected to the fourth coaxial connector to use the antenna.

[0052] The working principle of the MIMO dielectric resonator antenna based on E-plane decoupling of the directional pattern is as follows: Fig.15 shown. Fig.15(a) is the structure of the MIMO dielectric resonator antenna based on E-plane decoupling of the directional pattern in this embodiment without the third metal strip, and the electric field distribution caused by this structure. Figure 5 (b) is the structure of the MIMO dielectric resonator antenna based on H-plane decoupling of the directional pattern provided with the third metal strip in this embodiment, and the electric field distribution brought about by the third metal strip as a decoupling structure. Fig.15 As shown in (a), in the absence of the third metal strip, when the third dielectric antenna is excited by the third slot and the fourth dielectric antenna is loaded with a 50 ohm resistor, the third dielectric antenna and the second dielectric antenna operate in the high-order TE mode. y3δ1 , the high-order mode exists in the dielectric antenna formed by the first dielectric antenna and the second dielectric antenna, so the isolation between the first dielectric antenna and the second dielectric antenna will be sharply deteriorated. At the same time, since the electric field of the high-order mode is distributed in the first dielectric antenna and the second dielectric antenna with equal amplitude and opposite phase, the radiation pattern of the first dielectric antenna is distorted. Fig.15 (b) shows the electric field distribution in the first dielectric antenna and the second dielectric antenna under the excitation of the decoupling structure, i.e., the third metal strip. Based on the superposition principle, the electric field distribution in the MIMO dielectric resonator antenna based on the E-plane decoupling of the directional pattern in this embodiment is Fig.15 (a) The electric field and Fig.15 (b) shows the superposition of the electric fields. The electric field distribution is as follows: Fig.15 (c) as shown. Figure 5 In (c), since the third metal strip is not grounded, after superposition, the first dielectric antenna now operates in its fundamental mode TE y 1δ1 The electric field strength at the second dielectric antenna is almost zero. Therefore, port decoupling is achieved between the first dielectric antenna and the second dielectric antenna; the radiation characteristics of the first dielectric antenna are not affected because it works in the fundamental mode, and directional pattern decoupling is achieved between the first dielectric antenna and the second dielectric antenna.

[0053] In this embodiment, the dimensions of the components in the MIMO dielectric resonator antenna based on E-plane decoupling of the directional pattern are marked on Figure 11-14 The values ​​of these dimensions are set as follows: a = 46, b = 23, h = 7.2, l1 = 10, w1 = 1.8, l2 = 4.7, w2 = 0.5, l3 = 2.7, w3 = 0.2, t s =1.524,l s =15,w s =2, l g =73,w g=50, l4=30, w4=3.6, d1=0.8 The above numerical units are all millimeters. With the above dimensions, the MIMO dielectric resonator antenna based on E-plane decoupling of the directional pattern is measured and simulated. Specifically, a MIMO dielectric resonator antenna based on H-plane decoupling of the directional pattern with the above structure and parameters is established in a computer, and the third coaxial connector is used as port 1 and the fourth coaxial connector is used as port 2 for simulation; the third coaxial connector in the MIMO dielectric resonator antenna based on E-plane decoupling of the directional pattern is connected to the test instrument as port 1 and the fourth coaxial connector as port 2 for measurement. The simulation and measurement results are shown in the figure below. Figure 16-20 shown.

[0054] The antenna test and simulation S parameter results are as follows Fig.16 As shown. Fig.16 It can be seen that the measured and simulated 10dB impedance bandwidths are 7.7% (4.86–5.25GHz) and 6.1% (4.77–5.07GHz), respectively. The measured results have a frequency offset of about 2.4% compared to the simulation. This frequency offset is caused by the air gap between the dielectric antenna and the ground and the processing error. In addition, from Fig.16 At the same time, it can be seen that there is a certain inconsistency in the response between the first dielectric antenna and the second dielectric antenna. This is caused by the assembly error of the dielectric antenna. The isolation between the first dielectric antenna and the second dielectric antenna port is greater than 20dB within the working frequency band (4.8-5GHz).

[0055] Fig.17 The figure shows the comparison of the antenna radiation pattern at 5.02GHz between the test and simulation. As can be seen from the figure, the test pattern is well consistent with the simulation result. The maximum radiation direction of the test pattern is along the z-axis, and has good consistency. The measured cross-polarization is lower than 12.6dB in the main radiation direction. Fig.17 (a) The measured directivity diagram of port 1 is shown in Figure 1. Fig.17 (b) The measured direction of port 2 Figure 1 Good consistency.

[0056] Fig.18 The figure shows the comparison between the measured and simulated antenna gain. Fig.18 It can be seen that the curve trends between the first dielectric antenna and the second dielectric antenna are well matched, with only about 0.2dB inconsistency. At the same time, the measured gain is 0.4dB lower than the simulation result. The conductor loss and dielectric loss in actual processing cause the gain to decrease.

[0057] Fig.19The figure shows a comparison diagram of measured and simulated antenna radiation efficiency. It can be seen from the figure that the measured efficiency of the first dielectric antenna and the second dielectric antenna is greater than 80.8% within the working frequency band. The highest value of the measured antenna efficiency is 88.4%.

[0058] Fig. 20 The figure shows the comparison between the measured and simulated antenna envelope correlation coefficients. The simulation results of the antenna envelope correlation coefficient can be derived from the software, while the measured results are obtained based on the tested directional pattern. From the measured results, it can be seen that the antenna envelope correlation coefficient is lower than 0.034 within the frequency band, which meets the requirement of the antenna envelope correlation coefficient lower than 0.5 in the MIMO system. The measured envelope correlation coefficient results show that the antenna has good spatial multiplexing capability.

[0059] pass Figure 16-20 From the measured and simulated results shown, it can be seen that the directional patterns of the two ports of the MIMO dielectric resonator antenna based on the directional pattern E-plane decoupling maintain a good shape, which can achieve a good decoupling effect, and also has additional effects such as better spatial multiplexing capability.

[0060] In this embodiment, the first metal strip and the second metal strip may be set in the MIMO dielectric resonator antenna based on the directional pattern E-plane decoupling, with reference to the setting of the first metal strip and the second metal strip in the MIMO dielectric resonator antenna based on the directional pattern H-plane decoupling, or the third metal strip may be set in the MIMO dielectric resonator antenna based on the directional pattern E-plane decoupling. Based on the superposition principle, by setting the first metal strip, the second metal strip and the third metal strip, the improvement of the directional pattern H-plane and the E-plane can be achieved at the same time.

[0061] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it may be directly fixed or connected to another feature, or it may be indirectly fixed or connected to another feature. In addition, the descriptions of up, down, left, right, etc. used in this disclosure are only relative to the relative positional relationship of the components of the present disclosure in the accompanying drawings. The singular forms of "a", "said" and "the" used in this disclosure are also intended to include the plural forms, unless the context clearly indicates other meanings. In addition, unless otherwise defined, all technical and scientific terms used in this embodiment have the same meaning as those generally understood by technicians in this technical field. The terms used in the specification of this embodiment are only for describing specific embodiments, not for limiting the present invention. The term "and / or" used in this embodiment includes any combination of one or more related listed items.

[0062] It should be understood that, although the term first, second, third etc. may be adopted to describe various elements in the present disclosure, these elements should not be limited to these terms. These terms are only used to distinguish the same type of elements from each other. For example, without departing from the scope of the present disclosure, the first element may also be referred to as the second element, and similarly, the second element may also be referred to as the first element. The use of any and all examples or exemplary language ("for example", "such as" etc.) provided by the present embodiment is only intended to better illustrate embodiments of the present invention, and unless otherwise required, the scope of the present invention will not be limited.

[0063] It should be appreciated that embodiments of the present invention may be implemented or enforced by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer-readable memory. The method may be implemented in a computer program using standard programming techniques - including a non-transitory computer-readable storage medium configured with a computer program, wherein the storage medium so configured causes the computer to operate in a specific and predefined manner - according to the methods and drawings described in the specific embodiments. Each program may be implemented in a high-level procedural or object-oriented programming language to communicate with a computer system. However, if desired, the program may be implemented in an assembly or machine language. In any case, the language may be a compiled or interpreted language. In addition, the program may be run on a programmed ASIC for this purpose.

[0064] In addition, the operations of the process described in this embodiment may be performed in any suitable order, unless otherwise indicated in this embodiment or otherwise clearly contradicted by the context. The process described in this embodiment (or variations and / or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as a code (e.g., executable instructions, one or more computer programs, or one or more applications) executed jointly on one or more processors, by hardware or a combination thereof. The computer program includes a plurality of instructions that may be executed by one or more processors.

[0065] Further, the method can be implemented in any type of computing platform that is operably connected to a suitable computer, including but not limited to a personal computer, a minicomputer, a mainframe, a workstation, a network or distributed computing environment, a separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, etc. Various aspects of the present invention can be implemented in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, an optical read and / or write storage medium, a RAM, a ROM, etc., so that it can be read by a programmable computer, and when the storage medium or device is read by the computer, it can be used to configure and operate the computer to perform the process described herein. In addition, the machine-readable code, or a portion thereof, can be transmitted via a wired or wireless network. When such media includes instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor, the invention described in this embodiment includes these and other different types of non-transitory computer-readable storage media. When programmed according to the methods and techniques of the present invention, the present invention also includes the computer itself.

[0066] The computer program can be applied to input data to perform the functions described in the present embodiment, thereby converting the input data to generate output data stored in a non-volatile memory. The output information can also be applied to one or more output devices such as a display. In a preferred embodiment of the present invention, the converted data represents a physical and tangible object, including a specific visual depiction of the physical and tangible object produced on the display.

[0067] The above is only a preferred embodiment of the present invention. The present invention is not limited to the above implementation. As long as the technical effect of the present invention is achieved by the same means, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the present invention. Within the scope of protection of the present invention, its technical scheme and / or implementation method may have various modifications and changes.

Claims

1. A MIMO dielectric resonator antenna based on pattern decoupling, It is characterized in that include: dielectric substrate; The dielectric substrate comprises a first surface and a second surface; a first dielectric antenna; a second dielectric antenna; The first dielectric antenna and the second dielectric antenna are mounted on a first surface of the dielectric substrate, and one surface of the first dielectric antenna is bonded to one surface of the second dielectric antenna to form a bonding surface; a first metal strip; a portion of the first metal strip is attached to one side of the first dielectric antenna, another portion of the first metal strip is attached to one side of the second dielectric antenna, and the first metal strip spans an edge of the bonding surface; a second metal strip; a portion of the second metal strip is attached to the other side of the first dielectric antenna, another portion of the second metal strip is attached to the other side of the second dielectric antenna, and the second metal strip spans the other edge of the bonding surface.

2. The MIMO dielectric resonator antenna according to claim 1, It is characterized in that The first dielectric antenna and the second dielectric antenna are rectangular parallelepipeds with the same size; The bottom surface of the first dielectric antenna and the bottom surface of the second dielectric antenna are both attached to the first surface of the dielectric substrate; The first side surface of the first dielectric antenna and the first side surface of the second dielectric antenna are completely attached to each other, thereby forming the attached surface; The second side surface of the first dielectric antenna and the second side surface of the second dielectric antenna are located in the same plane, an edge of the bonding surface forms a boundary between the second side surface of the first dielectric antenna and the second side surface of the second dielectric antenna, a portion of the first metal strip is attached to the second side surface of the first dielectric antenna, and another portion of the first metal strip is attached to the second side surface of the second dielectric antenna; The third side surface of the first dielectric antenna and the third side surface of the second dielectric antenna are located in the same plane, the other edge of the bonding surface forms a boundary between the third side surface of the first dielectric antenna and the third side surface of the second dielectric antenna, a portion of the second metal strip is attached to the third side surface of the first dielectric antenna, and another portion of the second metal strip is attached to the third side surface of the second dielectric antenna.

3. The MIMO dielectric resonator antenna according to claim 2, It is characterized in that Also includes: First microstrip line; The first microstrip line is arranged on the first surface of the dielectric substrate, and the first microstrip line extends from the edge of the dielectric substrate along a direction parallel to the bonding surface to the bottom of the first dielectric antenna; A second microstrip line; the second microstrip line is arranged on the first surface of the dielectric substrate, and the second microstrip line extends from the edge of the dielectric substrate along a direction parallel to the bonding surface to the bottom of the second dielectric antenna; The first microstrip line and the second microstrip line are symmetrical with respect to the bonding surface.

4. The MIMO dielectric resonator antenna according to claim 3, It is characterized in that A metal ground is disposed on the second surface of the dielectric substrate; the metal ground is provided with a first gap and a second gap; the spatial projection of the first gap on the first surface intersects the first microstrip line perpendicularly, and the spatial projection of the second gap on the first surface intersects the second microstrip line perpendicularly.

5. The MIMO dielectric resonator antenna according to claim 3, It is characterized in that Also includes: A first coaxial connector; the first coaxial connector is mounted on an edge of the dielectric substrate, and the first coaxial connector is connected to the first microstrip line; A second coaxial connector; the second coaxial connector is mounted on the edge of the dielectric substrate, and the second coaxial connector is connected to the second microstrip line.

6. The MIMO dielectric resonator antenna according to any one of claims 1 to 5, It is characterized in that Also includes: A third metal strip; The third metal strip is bonded between the first dielectric antenna and the second dielectric antenna, and the third metal strip is located on the bonding surface.

7. The MIMO dielectric resonator antenna according to claim 6, It is characterized in that The first metal strip, the second metal strip and the second metal strip are all in an H-shape.

8. A MIMO dielectric resonator antenna based on pattern decoupling, It is characterized in that include: dielectric substrate; The dielectric substrate comprises a first surface and a second surface; a first dielectric antenna; a second dielectric antenna; The first dielectric antenna and the second dielectric antenna are mounted on a first surface of the dielectric substrate, and one surface of the first dielectric antenna is bonded to one surface of the second dielectric antenna to form a bonding surface; A third metal strip; the third metal strip is attached between the first dielectric antenna and the second dielectric antenna, and the third metal strip is located on the attachment surface; A third microstrip line; the third microstrip line is arranged on the first surface of the dielectric substrate, and the third microstrip line extends from the edge of the dielectric substrate along a direction perpendicular to the bonding surface to the bottom of the first dielectric antenna; A fourth microstrip line; the fourth microstrip line is arranged on the first surface of the dielectric substrate, and the fourth microstrip line extends from the edge of the dielectric substrate along a direction perpendicular to the bonding surface to the bottom of the second dielectric antenna; The third microstrip line and the fourth microstrip line are symmetrical with respect to the bonding surface.

9. The MIMO dielectric resonator antenna according to claim 8, It is characterized in that A metal ground is arranged on the second surface of the dielectric substrate; a third gap and a fourth gap are arranged on the metal ground; a spatial projection of the third gap on the first surface intersects the third microstrip line perpendicularly, and a spatial projection of the fourth gap on the first surface intersects the fourth microstrip line perpendicularly.

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