Omnidirectional polarization diversity stepped dielectric resonator antenna and wireless communication device

Abstract

The present invention discloses an omnidirectional polarization diversity stepped dielectric resonator antenna and wireless communication equipment, the antenna comprising: a dielectric substrate; a grounding layer connected to the top surface of the dielectric substrate; a dielectric resonator comprising a first cylinder and a second cylinder connected to the bottom surface thereof and having a smaller outer diameter, the bottom surface of the second cylinder being connected to the top surface of the grounding layer, and a parasitic patch with a circular hole being arranged on the top surface of the first cylinder; a feeding layer connected to the bottom surface of the dielectric substrate; a conductive probe, one end of which passes through the grounding layer and the dielectric substrate to be connected to the feeding layer, and the other end of which passes through the dielectric resonator and the circular hole to be in the same plane as the parasitic patch; the second cylinder covers the rectangular hole on the grounding layer, the first feeding port on the feeding layer is used to drive the feeding layer to excite the dielectric resonator through the rectangular hole to work in the first resonance mode, and the second feeding port on the feeding layer is used to drive the feeding layer to excite the dielectric resonator through the conductive probe to work in the second resonance mode. The present invention can improve the antenna bandwidth.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to an omnidirectional polarization diversity stepped dielectric resonator antenna and wireless communication equipment. Background Art

[0002] In the prior art, a very small number of dielectric resonator antennas can provide two omnidirectional ports at the same time, but the common defect of these dielectric resonator antennas is that the structure occupies a large space. Considering that dielectric resonator antennas usually need to be integrated with most communication systems with space constraints, how to improve the bandwidth of dielectric resonator antennas while the antenna structure occupies a limited space is a technical problem that needs to be solved in the antenna design stage. Summary of the invention

[0003] The present invention provides an omnidirectional polarization diversity stepped dielectric resonator antenna and wireless communication equipment to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] On the one hand, the present invention provides an omnidirectional polarization diversity stepped dielectric resonator antenna, comprising a dielectric substrate, a ground layer, a dielectric resonator, a feeding layer and a conductive probe;

[0005] The bottom surface of the grounding layer is connected to the top surface of the dielectric substrate, and a rectangular hole is provided on the grounding layer;

[0006] The dielectric resonator comprises a first cylinder and a second cylinder, the outer diameter of the first cylinder is larger than the outer diameter of the second cylinder, the bottom surface of the first cylinder is connected to the top surface of the second cylinder, the bottom surface of the second cylinder is connected to the top surface of the grounding layer, the top surface of the first cylinder is provided with a parasitic patch, and the parasitic patch is provided with a circular hole;

[0007] The feeding layer is connected to the bottom surface of the dielectric substrate, and a first feeding port and a second feeding port are provided on the feeding layer;

[0008] The first end of the conductive probe passes through the ground layer and the dielectric substrate and is connected to the feed layer, and the second end of the conductive probe passes through the dielectric resonator and the circular hole and is in the same plane as the parasitic patch;

[0009] The second cylinder covers and blocks part of the rectangular hole, the first feeding port is configured to drive the feeding layer to excite the dielectric resonator to work in a first resonance mode through the rectangular hole, and the second feeding port is configured to drive the feeding layer to excite the dielectric resonator to work in a second resonance mode through the conductive probe.

[0010] Furthermore, the number of the rectangular holes is four, and the four rectangular holes are arranged in a circular array around the conductive probe, the outer diameter of the circular array is larger than the outer diameter of the second cylinder, and the outer diameter of the circular array is smaller than the outer diameter of the first cylinder.

[0011] Furthermore, the feeding layer includes a power division component connected to the first feeding port, and the power division component excites the dielectric resonator to operate in the first resonance mode through the four rectangular holes.

[0012] Furthermore, the first resonance mode is TE 011+δ model.

[0013] Further, the power division component includes a first T-type power divider, a second T-type power divider and a third T-type power divider, the input end of the first T-type power divider is connected to the first feeding port, the first output end of the first T-type power divider is connected to the input end of the second T-type power divider, the second output end of the first T-type power divider is connected to the input end of the third T-type power divider, and the two output ends of the second T-type power divider and the two output ends of the third T-type power divider are correspondingly associated with the four rectangular holes.

[0014] Furthermore, the feeding layer includes a microstrip line component connected to the second feeding port, and the microstrip line component excites the dielectric resonator to operate in the second resonance mode through the conductive probe.

[0015] Furthermore, the second resonance mode is TM 02δ model.

[0016] Furthermore, the microstrip line component includes a gradient microstrip line and a 50-ohm microstrip line, the input end of the 50-ohm microstrip line is connected to the second feeding port, the output end of the 50-ohm microstrip line is connected to the input end of the gradient microstrip line, and the output end of the gradient microstrip line is connected to the first end of the conductive probe.

[0017] Furthermore, the dielectric resonator is made of ceramic material.

[0018] On the other hand, the present invention provides a wireless communication device, comprising any one of the above-mentioned omnidirectional polarization diversity stepped dielectric resonator antennas.

[0019] The present invention has at least the following beneficial effects: by using a stepped cylinder formed by two cylinders made of ceramic material as a dielectric resonator, and using a single cylinder with a smaller outer diameter to partially cover and shield each rectangular hole provided on the ground layer, and then by using the feeding layer and all the rectangular holes in coordination with each other and the feeding layer and the conductive probe in coordination with each other, the dielectric resonator can be stimulated to work in two different resonance modes to improve the antenna bandwidth; by forming an air ring at the bottom of the dielectric resonator, the air ring can cover the strong electric field area in the two different resonance modes, thereby increasing the impedance bandwidth in the two different resonance modes; the omnidirectional polarization diversity stepped dielectric resonator antenna proposed by the present invention adopts TE 011+δ Mode and TM 02δ This new omnidirectional radiation pattern combination, combined with the mode, can achieve the low profile characteristics of the antenna structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0021] Figure 1 It is an overall exploded schematic diagram of an omnidirectional polarization diversity stepped dielectric resonator antenna provided by an embodiment of the present invention;

[0022] Figure 2 is a side view of an omnidirectional polarization diversity stepped dielectric resonator antenna provided by an embodiment of the present invention;

[0023] Figure 3 is a top view of an omnidirectional polarization diversity stepped dielectric resonator antenna provided by an embodiment of the present invention;

[0024] Figure 4 is a bottom view of an omnidirectional polarization diversity stepped dielectric resonator antenna provided by an embodiment of the present invention;

[0025] Figure 5 is another bottom view of the omnidirectional polarization diversity stepped dielectric resonator antenna provided by an embodiment of the present invention;

[0026] Figure 6 It is a schematic diagram of reflection coefficients of each feeding port in the omnidirectional polarization diversity stepped dielectric resonator antenna provided by an embodiment of the present invention;

[0027] Figure 7 is a radiation pattern of a first feeding port in an omnidirectional polarization diversity stepped dielectric resonator antenna provided by an embodiment of the present invention;

[0028] Figure 8is a radiation pattern of a second feeding port in an omnidirectional polarization diversity stepped dielectric resonator antenna provided by an embodiment of the present invention;

[0029] Fig. 9 It is a schematic diagram of the gain of each feeding port in the omnidirectional polarization diversity stepped dielectric resonator antenna provided by an embodiment of the present invention;

[0030] Fig.10 It is a schematic diagram of envelope correlation coefficients between various feeding ports in the omnidirectional polarization diversity stepped dielectric resonator antenna provided by an embodiment of the present invention.

[0031] Figure numerals: 100, dielectric resonator; 110, first cylinder; 111, parasitic patch; 120, second cylinder; 200, dielectric substrate; 300, ground layer; 310, rectangular hole; 400, feeding layer; 410, first feeding port; 420, second feeding port; 430, power division component; 431, first T-type power divider; 432, second T-type power divider; 433, third T-type power divider; 440, microstrip line component; 441, 50 ohm microstrip line; 442, gradient microstrip line; 500, conductive probe. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the present invention will be further described below in conjunction with the embodiments and drawings.

[0033] In the description of the present invention, "several" means an indefinite quantity, "multiple" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0034] In the description of the present invention, the terms "comprises," "comprising," or any other variations thereof are intended to cover a non-exclusive inclusion, and may include other elements not explicitly listed in addition to those listed elements.

[0035] Please refer to Figures 1 to 4The embodiment of the present invention provides an omnidirectional polarization diversity stepped dielectric resonator antenna, which specifically includes a dielectric resonator 100, a dielectric substrate 200, a grounding layer 300, a feeding layer 400 and a conductive probe 500; wherein the dielectric resonator 100 includes a first cylinder 110 and a second cylinder 120, the outer diameter of the first cylinder 110 is greater than the outer diameter of the second cylinder 120, a parasitic patch 111 is arranged on the top surface of the first cylinder 110, a circular hole is arranged on the parasitic patch 111, a rectangular hole 310 is arranged on the grounding layer 300, and a first feeding port 410 and a second feeding port 420 are arranged on the feeding layer 400.

[0036] The bottom surface of the first cylinder 110 is connected to the top surface of the second cylinder 120, the bottom surface of the second cylinder 120 is connected to the top surface of the grounding layer 300, the bottom surface of the grounding layer 300 is connected to the top surface of the dielectric substrate 200, the bottom surface of the dielectric substrate 200 is connected to the feeding layer 400, the first end of the conductive probe 500 passes through the grounding layer 300 and the dielectric substrate 200 in sequence and then connects to the feeding layer 400, and the second end of the conductive probe 500 passes through the dielectric resonator 100 and the circular hole in sequence and then is in the same plane as the parasitic patch 111.

[0037] In practical applications, the second cylinder 120 is used to cover and shield part of the rectangular hole 310, and the first feeding port 410 is configured to drive the feeding layer 400 through the rectangular hole 310 to excite the dielectric resonator 100 to work in the first resonance mode, so that the dielectric resonator 100 can generate a first omnidirectional electromagnetic field parallel to the ground, and the second feeding port 420 is configured to drive the feeding layer 400 through the conductive probe 500 to excite the dielectric resonator 100 to work in the second resonance mode, so that the dielectric resonator 100 can generate a second omnidirectional electromagnetic field perpendicular to the ground, and the first omnidirectional electromagnetic field is orthogonal to the second omnidirectional electromagnetic field, so that the dielectric resonator antenna has an omnidirectional polarization diversity characteristic.

[0038] In some embodiments, the conductive probe 500 is arranged at the central axis of the dielectric resonator 100, which can maximize the coupling strength between the conductive probe 500 and the dielectric resonator 100, and is beneficial to transmit the energy provided by the second feeding port 420 from the feeding layer 400 to the dielectric resonator 100, thereby improving the radiation efficiency of the omnidirectional polarization diversity stepped dielectric resonator antenna.

[0039] In some embodiments, setting the central axis of the dielectric resonator 100 to coincide with the central axis of the dielectric substrate 200 can ensure that the propagation path of the electromagnetic wave inside the dielectric resonator 100 is the shortest, thereby reducing energy loss and improving resonance efficiency. It can also make the electromagnetic field distribution inside the dielectric resonator 100 more uniform, which is conducive to achieving better resonance effect and higher quality factor.

[0040] In some embodiments, the feed layer 400 includes a power division component 430 connected to the first feed port 410, and four rectangular holes 310 of the same size are arranged on the ground layer 300, so that the four rectangular holes 310 are arranged in a circular array around the conductive probe 500, that is, two adjacent rectangular holes 310 are vertically distributed with each other, and the outer diameter of the circular array is limited to be smaller than the outer diameter of the first cylinder 110, and the outer diameter of the circular array is limited to be larger than the outer diameter of the second cylinder 120, see Figure 3 As shown, the outer diameter of the circular array can be understood as the diameter of the smallest circular contour that can just completely surround the four rectangular holes 310 , so that the power division component 430 can excite the dielectric resonator 100 to work in the first resonance mode through the four rectangular holes 310 .

[0041] Among them, the first resonance mode is TE 011+δ The main characteristics of this mode are as follows: the electric field rotates horizontally around the origin, there is an energy concentration area along the radial direction (i.e., the r direction), and there is a large half standing wave of the magnetic field along the vertical direction (i.e., the +z direction).

[0042] It should be noted that the dielectric substrate 200 also adopts a cylindrical structure. The grounding layer 300 can be understood as being obtained by copper coating on the top surface of the dielectric substrate 200. The thickness of the grounding layer 300 is the thickness of the copper foil. The four rectangular holes 310 can be understood as being formed by copper coating and etching on the grounding layer 300.

[0043] Specifically, the power division component 430 includes a first T-type power divider 431, a second T-type power divider 432, and a third T-type power divider 433; the input end of the first T-type power divider 431 is connected to the first feeding port 410, the first output end of the first T-type power divider 431 is connected to the input end of the second T-type power divider 432, the second output end of the first T-type power divider 431 is connected to the input end of the third T-type power divider 433, and the two output ends of the second T-type power divider 432 and the two output ends of the third T-type power divider 433 are correspondingly associated with the four rectangular holes 310. In order to better illustrate the positional correspondence between all the output ports of the second T-type power divider 432 and the third T-type power divider 433 and the four rectangular holes 310, an embodiment of the present invention provides Figure 5An intuitive representation is provided, and each T-type power divider is divided by using multiple curve segments.

[0044] In practical applications, when the first feeding port 410 receives an initial feeding signal provided by an external device, the first T-type power divider 431 is used to divide the initial feeding signal into two intermediate feeding signals of equal amplitude and phase, and the second T-type power divider 432 is used to divide one of the intermediate feeding signals into two final feeding signals of equal amplitude and phase, and the third T-type power divider 433 is used to divide the other intermediate feeding signal into two final feeding signals of equal amplitude and phase. It can be understood that the power division component 430 is used to further divide the initial feeding signal into four final feeding signals of equal amplitude and phase, and the four final feeding signals are transmitted through the four rectangular holes 310 and act on the dielectric resonator 100, so that an equivalent circular current is generated at the bottom of the dielectric resonator 100, so that the dielectric resonator 100 can work in TE 011+δ model.

[0045] In some embodiments, the feeding layer 400 includes a microstrip line component 440 connected to the second feeding port 420 . The microstrip line component 440 can excite the dielectric resonator 100 to operate in the second resonance mode through the conductive probe 500 .

[0046] Among them, the second resonance mode is TM 02δ The main characteristics of this mode are as follows: the magnetic field rotates horizontally around the origin, there are two energy concentration areas along the radial direction (i.e., the r direction), and there is a small half standing wave in the electric field along the vertical direction (i.e., the +z direction).

[0047] Specifically, the microstrip line component 440 includes a 50 ohm microstrip line 441 and a gradient microstrip line 442. Figure 5 As shown, the input end of the 50-ohm microstrip line 441 is connected to the second feeding port 420 , the output end of the 50-ohm microstrip line 441 is connected to the input end of the gradient microstrip line 442 , and the output end of the gradient microstrip line 442 is connected to the first end of the conductive probe 500 .

[0048] In practical applications, when the second feeding port 420 receives a feeding signal provided by an external device, the feeding signal will be transmitted in sequence through the 50-ohm microstrip line 441, the gradient microstrip line 442 and the conductive probe 500 and finally act on the dielectric resonator 100, so that the dielectric resonator 100 can work in TM 02δmode; wherein the 50-ohm microstrip line 441 is mainly used to minimize energy loss and distortion during signal transmission, the gradient microstrip line 442 is mainly used to provide a smooth impedance transition between the 50-ohm microstrip line 441 and the conductive probe 500, and the parasitic patch 111 can be used to adjust the impedance matching of the second feeding port 420 during signal transmission.

[0049] In some embodiments, the dielectric resonator 100 is made of ceramic material, and the dielectric substrate 200 can be made of ceramic material, glass material, or other materials, which is not limited in the present application.

[0050] In order to better illustrate the characteristics of the omnidirectional polarization diversity stepped dielectric resonator antenna provided by the embodiment of the present invention, it is preferred to use the existing HFSS (High Frequency Structural Simulator, high frequency electromagnetic field simulation) software to perform structural construction and simulation analysis on the omnidirectional polarization diversity stepped dielectric resonator antenna, as described in detail as follows:

[0051] In the process of constructing the structure of the omnidirectional polarization diversity stepped dielectric resonator antenna, the basic parameters of the omnidirectional polarization diversity stepped dielectric resonator antenna are set as follows:

[0052] (1) The dielectric constant of the dielectric resonator 100 is set to 10.2, and the dielectric constant of the dielectric substrate 200 is set to 6.15;

[0053] (2) The thickness of the dielectric resonator 100 (i.e., the distance from the top surface of the first cylinder 110 to the bottom surface of the second cylinder 120) is set to 4.5 mm, the thickness of the second cylinder 120 is set to 1.9 mm, the diameter of the first cylinder 110 is set to 63.2 mm, the diameter of the second cylinder 120 is set to 36 mm, the length of the conductive probe 500 is set to 5.13 mm, the width of the conductive probe 500 is set to 1 mm, the thickness of the dielectric substrate 200 is set to 0.63 mm, the diameter of the dielectric substrate 200 is set to 116 mm, the length of each rectangular hole 310 is set to 11.2 mm, the width of each rectangular hole 310 is set to 4.5 mm, and the parasitic patch 111 is set to The parasitic patch 111 is a square patch with a side length of 8 mm. The diameter of the circular hole arranged at the center of the parasitic patch 111 is 1.5 mm. The minimum distance between each rectangular hole 310 and the central axis of the conductive probe 500 is 10.5 mm. Since a hole needs to be opened on the central axis of the dielectric resonator 100 to accommodate the conductive probe 500 passing through, the diameter of the opening is set to 1.2 mm. The microstrip line width of each T-type power divider is set to 0.92 mm. However, in the annular transmission segment included in the first T-type power divider 431, the arc transmission segment included in the second T-type power divider 432, and the arc transmission segment included in the third T-type power divider 433, the microstrip line width of the annular transmission segment and the two arc transmission segments is set to 0.456 mm.

[0054] It should be noted that, in the power division component 430, the annular transmission segment and the two arc-shaped transmission segments are both configured using 70.7 ohm transmission lines, while the other transmission segments are configured using 50 ohm transmission lines, so that impedance matching can be achieved between the input end and the two output ends of each T-type power divider.

[0055] The simulation analysis of the built omnidirectional polarization diversity stepped dielectric resonator antenna structure is carried out, and the corresponding analysis results are as follows:

[0056] (1) See Figure 6 As shown, according to the reflection coefficient S 11 It can be seen from the simulation curve that when the omnidirectional polarization diversity stepped dielectric resonator antenna has a low profile characteristic (that is, the thickness of the dielectric resonator 100 is set to 4.5 mm), the overlapping impedance bandwidth that can be obtained by the omnidirectional polarization diversity stepped dielectric resonator antenna is 12% (5.59 GHz-6.29 GHz). It can be seen that the omnidirectional polarization diversity stepped dielectric resonator antenna can be used in the WLAN-5.8 GHz (i.e., 5.725 GHz-5.85 GHz) frequency band and the V2X (i.e., 5.905 GHz-5.925 GHz) frequency band; and according to the reflection coefficient S 12From the simulation curve, it can be seen that the minimum isolation between the two feeding ports provided by the omnidirectional polarization diversity stepped dielectric resonator antenna is 25dB. It can be seen that the omnidirectional polarization diversity stepped dielectric resonator antenna can achieve good port isolation performance within the 12% overlapping impedance bandwidth.

[0057] (2) See Figure 7 and Figure 8 As shown, Figure 7 It mainly reflects the E-plane radiation pattern and the H-plane radiation pattern of the first feeding port 410 of the omnidirectional polarization diversity stepped dielectric resonator antenna at a frequency of 5.8 GHz. Figure 8 It mainly reflects the E-plane radiation pattern and H-plane radiation pattern of the second feeding port 420 of the omnidirectional polarization diversity stepped dielectric resonator antenna at a frequency of 5.8 GHz, wherein the E-plane radiation pattern is used to reflect the change of the antenna radiation intensity with the azimuth angle. The change of azimuth It refers to the angle between the antenna radiation direction and the horizontal plane. The H-plane radiation pattern is used to reflect the change of the antenna radiation intensity with the elevation angle θ. The elevation angle θ refers to the angle between the antenna radiation direction and the antenna axis. It can be seen that the two feeding ports provided by the omnidirectional polarization diversity stepped dielectric resonator antenna both have omnidirectional radiation characteristics, and the electric fields generated by the two feeding ports inside the dielectric resonator 100 are orthogonal to each other.

[0058] (3) See Fig. 9 As shown, the observation directions of the two feeding ports provided for the omnidirectional polarization diversity stepped dielectric resonator antenna are both θ=30° and It can be seen that the maximum gain of the first feeding port 410 provided by the omnidirectional polarization diversity stepped dielectric resonator antenna at a frequency of 5.95 GHz is 6.7 dBi, and the minimum peak gain of the second feeding port 420 provided by the omnidirectional polarization diversity stepped dielectric resonator antenna at a frequency of 5.75 GHz is 4.5 dBi.

[0059] (4) See Fig.10 As shown, it can be seen that the envelope correlation coefficient between the two feeding ports provided by the omnidirectional polarization diversity stepped dielectric resonator antenna is less than -30 dB in the frequency band of 5.59 GHz to 6.29 GHz.

[0060] In the embodiment of the present invention, a stepped cylinder formed by two cylinders made of ceramic material is used as a dielectric resonator, and each rectangular hole provided on the ground layer is partially covered and shielded by a single cylinder with a smaller outer diameter, and then the feeding layer is used in coordination with all the rectangular holes and the feeding layer is used in coordination with the conductive probe, so that the dielectric resonator can be stimulated to work in two different resonance modes to improve the antenna bandwidth; an air ring is formed at the bottom of the dielectric resonator, and the air ring can cover the strong electric field area in the two different resonance modes, thereby increasing the impedance bandwidth in the two different resonance modes; the omnidirectional polarization diversity stepped dielectric resonator antenna proposed in the embodiment of the present invention adopts TE 011+δ Mode and TM 02δ This new omnidirectional radiation pattern combination, combined with the mode, can achieve the low profile characteristics of the antenna structure.

[0061] In addition, an embodiment of the present invention further provides a wireless communication device, comprising the omnidirectional polarization diversity stepped dielectric resonator antenna provided by the above embodiment.

[0062] The contents of the above embodiments are all applicable to this embodiment. The functions specifically implemented by this embodiment are the same as those of the above embodiments, and the beneficial effects achieved are also the same as those achieved by the above embodiments.

[0063] The embodiments described in the embodiments of the present invention are intended to more clearly illustrate the technical solutions of the embodiments of the present invention, and do not constitute a limitation on the technical solutions provided by the embodiments of the present invention. Those skilled in the art can appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of the present invention are also applicable to similar technical problems.

[0064] It will be understood by those skilled in the art that the technical solutions shown in the drawings do not constitute limitations on the embodiments of the present invention, and the terms "first", "second", "third", "fourth", etc. in the specification of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0065] It should be understood that in the present invention, "at least one (item)" refers to one or more, and "plurality" refers to two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can represent: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can be represented by: "a", "b", "c", "a and b", "a and c", "b and c", or "a, b and c", where a, b, c can be single or multiple.

[0066] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the embodiments of the present invention is not limited thereby. Any modification, equivalent substitution and improvement made by those skilled in the art without departing from the scope and essence of the embodiments of the present invention shall be within the scope of the rights of the embodiments of the present invention.

Claims

1. An omnidirectional polarization diversity stepped dielectric resonator antenna, characterized in that: It includes a dielectric substrate, a ground layer, a dielectric resonator, a feeding layer and a conductive probe; The bottom surface of the grounding layer is connected to the top surface of the dielectric substrate, and a rectangular hole is provided on the grounding layer; The dielectric resonator comprises a first cylinder and a second cylinder, the outer diameter of the first cylinder is larger than the outer diameter of the second cylinder, the bottom surface of the first cylinder is connected to the top surface of the second cylinder, the bottom surface of the second cylinder is connected to the top surface of the grounding layer, the top surface of the first cylinder is provided with a parasitic patch, and the parasitic patch is provided with a circular hole; The feeding layer is connected to the bottom surface of the dielectric substrate, and a first feeding port and a second feeding port are provided on the feeding layer; The first end of the conductive probe passes through the ground layer and the dielectric substrate and is connected to the feed layer, and the second end of the conductive probe passes through the dielectric resonator and the circular hole and is in the same plane as the parasitic patch; The second cylinder covers and blocks part of the rectangular hole, and the first feeding port is configured to drive the feeding layer to excite the dielectric resonator to work in the first resonance mode through the rectangular hole, and the first resonance mode is TE 011+δ mode, the second feeding port is configured to drive the feeding layer to excite the dielectric resonator to work in the second resonance mode through the conductive probe, and the second resonance mode is TM 02δ model; The number of the rectangular holes is four, and the four rectangular holes are arranged in a circular array around the conductive probe, the outer diameter of the circular array is larger than the outer diameter of the second cylinder, and the outer diameter of the circular array is smaller than the outer diameter of the first cylinder; Wherein, the feeding layer includes a power division component connected to the first feeding port, and the power division component excites the dielectric resonator to work in the first resonance mode through the four rectangular holes; the power division component includes a first T-type power divider, a second T-type power divider and a third T-type power divider, the input end of the first T-type power divider is connected to the first feeding port, the first output end of the first T-type power divider is connected to the input end of the second T-type power divider, the second output end of the first T-type power divider is connected to the input end of the third T-type power divider, and the two output ends of the second T-type power divider and the two output ends of the third T-type power divider are correspondingly associated with the four rectangular holes; Wherein, the feeding layer includes a microstrip line component connected to the second feeding port, and the microstrip line component excites the dielectric resonator to operate in the second resonance mode through the conductive probe; the microstrip line component includes a gradient microstrip line and a 50-ohm microstrip line, the input end of the 50-ohm microstrip line is connected to the second feeding port, the output end of the 50-ohm microstrip line is connected to the input end of the gradient microstrip line, and the output end of the gradient microstrip line is connected to the first end of the conductive probe.

2. The omnidirectional polarization diversity stepped dielectric resonator antenna according to claim 1, characterized in that: The dielectric resonator is made of ceramic material.

3. A wireless communication device, characterized in that: It comprises the omnidirectional polarization diversity stepped dielectric resonator antenna as claimed in any one of claims 1 to 2.

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