Wide-beam dielectric resonator antenna unit based on double magnetic currents

Abstract

The invention provides a wide-beam dielectric resonator antenna unit based on double magnetic currents. The wide-beam dielectric resonator antenna unit comprises a rectangular dielectric resonator, a door-shaped parasitic metal ring structure, a feed gap, a feed network, a floor, an SMA connector and a dielectric plate. The rectangular dielectric resonator is of an axisymmetric structure, and the feed network and the parasitic metal ring structure are also symmetrically distributed, so that the symmetry and the stability of an antenna radiation pattern and a phase center can be ensured; the rectangular dielectric resonator antenna serving as the main radiator and the door-shaped metal ring structures of the parasitic radiators jointly act to generate a directional diagram in a wide-angle coverage range, and the door-shaped parasitic metal rings on the two sides obtain a part of energy from the rectangular dielectric resonator in a near-field coupling mode to generate radiation in the horizontal direction. The wide beam characteristic of an E-plane directional diagram is realized by combining the directional radiation of the fundamental mode of the rectangular dielectric resonator and the omnidirectional radiation of the door-shaped parasitic metal ring and matching with a proper phase; the antenna is compact and simple in structure, wide in wave beam and low in cross polarization.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, and particularly to a wide-beam dielectric resonator antenna unit based on dual magnetic currents. Background Art

[0002] Compared with classical mechanical scanning antennas, phased array antennas do not require heavy and slow servo structures. By simply adjusting the phase between units, fast beam scanning can be achieved, and they have advantages such as low profile, high speed, and high reliability. They have become the best choice in current radar, communication, and other systems. The spatial coverage of a phased array antenna depends on the scanning angle of the phased array. Based on the pattern multiplication theorem, the gain of a phased array antenna at a certain angle is jointly determined by the element factor and the array factor. The array factor is realized by controlling the phase between units. Therefore, the main research difficulty of wide-angle scanning phased arrays lies in the design of wide-beam antenna units.

[0003] Dielectric resonator antennas have advantages such as high radiation efficiency, zero metallic loss, small volume, low profile, and flexible shape. In addition, compared with low-profile antennas such as patches, dielectric resonator antennas have a longitudinal aperture projection and have a natural wide-beam advantage. In recent years, the wide-beam dielectric resonator antenna structures published are complex and difficult to fabricate. For example, drilling in the dielectric body is required and it is easy to introduce cross-polarization components such as vertical currents, resulting in the deterioration of cross-polarization discrimination.

[0004] Therefore, a dielectric resonator antenna that can solve cross-polarization is needed. Summary of the Invention

[0005] The present invention is to solve the problem of cross-polarization and provides a wide-beam dielectric resonator antenna unit based on dual magnetic currents, including a rectangular dielectric resonator, a ground plane, a U-shaped parasitic metal ring structure, a feeding slot, a dielectric slab, and a feeding network at the bottom layer; the rectangular dielectric resonator is located at the top layer of the entire antenna; the ground plane is located above the dielectric slab and is a square metal sheet with a rectangular slot; the feeding network is located below the dielectric slab and is specifically a microstrip line structure; the U-shaped parasitic metal ring structure and the rectangular dielectric resonator operating in the fundamental mode are equivalent to two different magnetic currents, and their radiations are complementary to achieve a wide-beam unit with low cross-polarization characteristics.

[0006] The present invention provides a wide-beam dielectric resonator antenna unit based on dual magnetic currents, including a rectangular dielectric resonator, a U-shaped parasitic metal ring structure, a feeding slot, a feeding network, a ground plane, an SMA connector, and a dielectric slab;

[0007] The dielectric substrate includes a horizontal dielectric substrate connected to the bottom of the ground plane, and vertical dielectric substrates vertically connected to the ground plane and the horizontal dielectric substrate and located on both sides of the rectangular dielectric resonator. The number of the U-shaped parasitic metal loop structures and the vertical dielectric substrates is both 2. One U-shaped parasitic metal loop structure is connected to one vertical dielectric substrate and faces the rectangular dielectric resonator.

[0008] The U-shaped parasitic metal loop structure includes a first metal strip extending along the length direction of the vertical dielectric substrate, and a second metal strip and a third metal strip vertically connected to the first metal strip and extending towards the horizontal dielectric substrate. The horizontal center of the first metal strip is located on the extended plane of the upper surface of the rectangular dielectric resonator, and the vertical centers of the second metal strip and the third metal strip are both located on the extended plane of the side surface of the rectangular dielectric resonator.

[0009] The feeding slot is etched at the center of the ground plane and located at the bottom center of the rectangular dielectric resonator. The feeding network is connected to the bottom surface of the horizontal dielectric substrate, the input end is connected to the side-fed SMA connector, and the output end is located below the feeding slot. The side-fed SMA connector is connected to one end of the ground plane.

[0010] Energy is fed in from the port, transmitted along the feeding network to the feeding slot and the rectangular dielectric resonator. The two U-shaped parasitic metal loop structures on both sides obtain part of the energy from the rectangular dielectric resonator through the near-field coupling method and generate radiation in the horizontal direction.

[0011] A wide-beam dielectric resonator antenna unit based on dual magnetic currents according to the present invention, as a preferred mode, combines the directional radiation of the fundamental mode of the rectangular dielectric resonator and the omnidirectional radiation of the U-shaped parasitic metal loop structure, and then matches the phase to achieve the wide-beam characteristic of the E-plane pattern.

[0012] A wide-beam dielectric resonator antenna unit based on dual magnetic currents according to the present invention, as a preferred mode, adjusts the antenna impedance matching degree by adjusting the size of the feeding slot and the relative position between the feeding slot and the microstrip line in the feeding network.

[0013] A wide-beam dielectric resonator antenna unit based on dual magnetic currents according to the present invention, as a preferred mode, adjusts the antenna resonance frequency by adjusting the size of the rectangular dielectric resonator.

[0014] A wide-beam dielectric resonator antenna unit based on dual magnetic currents according to the present invention, as a preferred mode, adjusts the large-angle radiation energy by adjusting the size of the U-shaped parasitic metal loop structure, and regulates the phase of the coupling energy by the distance between the U-shaped parasitic metal loop structure and the rectangular dielectric resonator.

[0015] The pattern shape and width of the antenna unit are regulated by adjusting the large-angle radiation energy and the phase of the coupling energy.

[0016] A wide-beam dielectric resonator antenna unit based on dual magnetic currents according to the present invention, as a preferred embodiment, the rectangular dielectric resonator is an axisymmetric structure, and the U-shaped parasitic metal ring structure and the feeding network are also symmetrically distributed;

[0017] The first metal strip extends along the x direction, and the second and third metal strips both extend along the z direction;

[0018] The feeding slot is a rectangular slot with its long side extending along the y direction;

[0019] The ground plane is a metal sheet;

[0020] It further includes a plugging structure for connecting the vertical dielectric plate to the horizontal dielectric plate. The plugging structure includes four rectangular dielectric holes connected to the horizontal dielectric plate and a protruding dielectric block connected to the end of the vertical dielectric plate. An opening is provided on the ground plane for the dielectric block to pass through.

[0021] A wide-beam dielectric resonator antenna unit based on dual magnetic currents according to the present invention, as a preferred embodiment, the material of the rectangular dielectric resonator is a ceramic with a dielectric constant of 9.5;

[0022] Both the horizontal dielectric plate and the vertical dielectric plate are Rogers 4003 plates. The horizontal dielectric plate is a double-sided PCB board, and the vertical dielectric plate is a single-sided PCB board. The U-shaped parasitic metal ring structure is etched on the vertical dielectric plate.

[0023] A wide-beam dielectric resonator antenna unit based on dual magnetic currents according to the present invention, as a preferred embodiment, the length of the rectangular dielectric resonator is 16 mm, the width is 16 mm, and the height is 9 mm;

[0024] The length of the U-shaped parasitic metal ring structure is 28.4 mm and the width is 8.8 mm;

[0025] The width of the feeding network is 1.65 mm;

[0026] The ground plane is a square metal plate with a side length of 50 mm;

[0027] The flange base of the SMA connector is welded to the ground plane, and the coaxial inner core is welded to the input end of the feeding network;

[0028] The horizontal dielectric plate is a cube with a side length of 50 mm and a thickness of 0.813 mm; the vertical dielectric plate is a cuboid with a length of 28.4 mm, a width of 9 mm, and a thickness of 0.813 mm.

[0029] The present invention provides a wide-beam dielectric resonator antenna unit based on dual magnetic currents, which has a compact and simple structure, wide beam, low cross polarization, high radiation efficiency, stable gain and radiation pattern. The present invention realizes the complementary superposition of the radiation pattern through two equivalent magnetic currents in the same direction, and is a wide-beam dielectric resonator antenna unit with a low cross polarization level within a wide beam range.

[0030] The present invention has the following advantages:

[0031] (1) The rectangular dielectric resonator of the present invention has an axisymmetric structure, and the feeding network and the parasitic metal ring structure are also symmetrically distributed. This structure can ensure the symmetry and stability of the antenna radiation pattern and its phase center.

[0032] (2) The present invention broadens the beam width of the dielectric resonator antenna by adding a parasitic structure. First, the rectangular dielectric resonator antenna as the main radiator and the parasitic radiator in the shape of a gate-shaped metal ring structure act together to generate a radiation pattern with a wide angular coverage range. The entire antenna unit is fed with energy from the port, and the energy is transmitted along the microstrip line to the feeding slot, and then the rectangular dielectric resonator antenna is excited by the way of slot coupling. The two side gate-shaped parasitic metal rings obtain a part of the energy from the rectangular dielectric resonator through near-field coupling to generate horizontal radiation. Combining the directional radiation of the fundamental mode of the rectangular dielectric resonator and the omnidirectional radiation of the gate-shaped parasitic metal ring, and with a suitable phase, the wide-beam characteristic of the E-plane radiation pattern is realized.

[0033] (3) The present invention has the advantages of a compact and simple structure, wide beam, low cross polarization, high radiation efficiency, stable gain and radiation pattern, etc., and is suitable for applications in the fields of radar and wireless communication, and the wireless communication includes but is not limited to satellite communication. Description of the Drawings

[0034] Figure 1 Schematic three-dimensional structure diagram of Embodiment 1 of a wide-beam dielectric resonator antenna unit based on dual magnetic currents;

[0035] Figure 2 Schematic side view structure diagram of Embodiment 1 of a wide-beam dielectric resonator antenna unit based on dual magnetic currents;

[0036] Figure 3 Schematic top view structure diagram of Embodiment 1 of a wide-beam dielectric resonator antenna unit based on dual magnetic currents;

[0037] Figure 4 Reflection coefficient data diagram of Embodiment 1 of a wide-beam dielectric resonator antenna unit based on dual magnetic currents;

[0038] Figure 5 Radiation pattern of Embodiment 1 of a wide-beam dielectric resonator antenna unit based on dual magnetic currents;

[0039] Figure 6 It is a gain data graph of Embodiment 1 of a wide-beam dielectric resonator antenna unit based on dual magnetic currents.

[0040] Reference numerals:

[0041] 1. Rectangular dielectric resonator; 2. Gate-shaped parasitic metal ring; 21. First metal strip; 22. Second metal strip; 23. Third metal strip; 3. Feeding slot; 4. Feeding network; 5. Ground plane; 6. Antenna port; 7. Dielectric board; 71. Horizontal dielectric board; 72. Vertical dielectric board; 8. Plug-in structure. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0043] Embodiment 1

[0044] As Figure 1 , Figure 2 and Figure 3 shown, a wide-beam dielectric resonator antenna unit based on dual magnetic currents includes at least a rectangular dielectric resonator 1, gate-shaped parasitic metal ring structures 2 on both sides, a feeding slot 3, a ground plane 5, a dielectric board 7, and a feeding network 4 at the bottom layer. The rectangular dielectric resonator 1 is an axisymmetric structure and is located at the top layer of the entire antenna structure as the main radiator of the antenna; the gate-shaped parasitic metal ring structure 2 is composed of 2 vertical metal strips (the second metal strip 22 and the third metal strip 23) on each of the two sides and 1 horizontal metal strip (the first metal strip 21), a total of 6 metal strips; the ground plane 5 is a square metal sheet with a rectangular slot etched in the center, located below the rectangular dielectric resonator 1 and above the dielectric board 7; the feeding network 4 is printed on the lower surface of the dielectric board 7; the feeding network specifically consists of a feeding microstrip line 4 and a side-fed SMA connector 6; the flange base of the SMA connector 6 is welded to the upper ground plane 5 of the dielectric board 7; by adjusting the size of the feeding slot 3 and the relative position between the feeding slot 3 and the microstrip line in the feeding network 4, the impedance matching degree of the antenna can be regulated; by adjusting the size of the rectangular dielectric resonator 1, the resonant frequency of the antenna can be adjusted; by adjusting the size of the gate-shaped parasitic metal ring structure 2, the amount of radiation energy at a large angle can be adjusted, and by adjusting the distance between the gate-shaped parasitic metal ring structure 2 and the main radiator rectangular dielectric resonator 1, the phase of the coupled energy can be regulated. Combining the above two adjustable parameters, the pattern shape and width of the antenna unit can be further regulated.

[0045] The slot 3 on the floor 5 is a rectangular slot. The rectangular slot 3 is located on the lower side of the rectangular dielectric resonator 1 and on the upper layer of the dielectric board 7. The long side of the rectangular slot 3 is along the y direction, and the rectangular slot 3 is located at the exact center of the floor 5.

[0046] The plug-in structure 8 of the vertical dielectric board 72 and the horizontal dielectric board 71 consists of four rectangular dielectric holes and four corresponding protruding dielectric blocks.

[0047] Both the two vertical dielectric boards 72 and the one horizontal dielectric board 71 are Rogers 4003 plates. The rectangular dielectric resonator 1 is made of a ceramic material with a dielectric constant of 9.5; the antenna dielectric board 7 is a double-sided PCB board and two vertical single-sided PCB boards; the horizontal dielectric board is a double-sided PCB board, with a feed network 4 on the lower layer and a square metal floor 5 with a rectangular slot 3 etched on the upper layer; the vertical dielectric board 72 is a single-sided PCB board, with a g-shaped parasitic metal ring structure 2 etched on one layer and no metal structure on the other layer; the main radiator of the antenna is the rectangular dielectric resonator 1.

[0048] The length of the rectangular dielectric resonator 1 is 16 mm, the width is 16 mm, and the height is 9 mm.

[0049] The g-shaped parasitic metal ring structure 2 is close to the rectangular dielectric resonator 1 but does not fit, and sufficient coupling amount can be achieved.

[0050] The horizontal double-sided copper-clad dielectric board 71 is square, with a side length of 50 mm and a thickness of 0.813 mm; the vertical single-sided copper-clad dielectric board 72 is rectangular, with a length of 28.4 mm, a width of 9 mm, and a thickness of 0.813 mm.

[0051] The antenna floor 5 is also square, with a side length of 50 mm.

[0052] The length of the g-shaped parasitic metal ring structure 2 located on one side of the vertical single-sided copper-clad dielectric board 72 is 28.4 mm, and the width is 8.8 mm.

[0053] The flange base of the SMA connector 6 is welded to the floor 5 on the upper layer of the horizontal double-sided copper-clad dielectric board 71, and the coaxial inner core of the SMA connector 6 is welded to the input end of the feed network 4.

[0054] The width of the feed microstrip line 4 is 1.65 mm.

[0055] The antenna of the present invention realizes the broadening of the beam width of the dielectric resonator antenna by adding parasitic structures. First, the rectangular dielectric resonator antenna 1 as the main radiator and the parasitic radiator in the shape of a portal metal ring structure 2 act together to generate a radiation pattern with a wide angular coverage range. The entire antenna unit is fed with energy through port 6, and the energy is transmitted along the microstrip line to the feeding slot, and then the rectangular dielectric resonator antenna is excited by means of slot coupling. The portal parasitic metal rings 2 on both sides obtain a part of the energy from the rectangular dielectric resonator 1 through near-field coupling to generate horizontal radiation. Combining the directional radiation of the fundamental mode of the rectangular dielectric resonator 1 and the omnidirectional radiation of the portal parasitic metal ring 2, and with a suitable phase, the wide-beam characteristic of the E-plane radiation pattern is realized.

[0056] The rectangular dielectric resonator antenna 1 operating in the fundamental mode can be equivalent to a horizontal magnetic current placed on the ground plane. Combining the mirror principle and the uniform geometrical diffraction theory, the radiation characteristics of the horizontal magnetic current on the finite ground plane can be calculated. By numerically analyzing the distance of the horizontal magnetic current from the ground plane, it can be obtained that when the horizontal magnetic current is at a quarter wavelength from the ground plane, its maximum radiation is towards the low elevation angle direction. When the height of the horizontal magnetic current from the ground plane is 0, its maximum radiation direction is the zenith direction. Therefore, the superposition of two magnetic currents with specific heights can achieve a wide-beam radiation pattern.

[0057] Based on the equivalence principle, the horizontal magnetic current can be equivalently realized by the annular electric field in the vertical section. The horizontal magnetic current placed on the ground plane can be obtained from the rectangular dielectric resonator 1 operating in the fundamental mode, and the horizontal magnetic current at a certain height from the ground plane can be equivalent to the metal ring 2 on the vertical plane. The rectangular dielectric resonator 1 is used as the main radiator, and the metal ring is used as the parasitic radiation structure, which obtains energy from the main radiator through near-field coupling. From the analysis of the superposition of far-field vector fields, the rectangular dielectric resonator with parasitic structures added on both sides is equivalent to dividing the energy into three unit radiations. The main radiator radiates towards the zenith direction, and the parasitic radiator radiates towards the horizontal direction. The structural parameters of the parasitic metal ring have an impact on both its resonant characteristics and radiation characteristics. Therefore, the classical metal circular ring is optimized into the portal parasitic metal ring structure 2. The distance between the rectangular dielectric resonator 1 and the portal parasitic metal ring structure 2 will affect the coupling phase between the two. In other words, the source phases of the two equivalent magnetic currents are not in phase, and the specific phase difference can be regulated by the distance between the rectangular dielectric resonator 1 and the portal parasitic metal ring structure 2. In addition, the size of the ground plane 5 will affect the radiation pattern and gain.

[0058] As Figure 1 shown, the flange of port 6 is welded to the ground plane 5 located on the horizontal dielectric plate 71 to ensure its grounding, and its inner conductor is connected to the input end of the feeding network located under the horizontal dielectric plate 71. There is an insertion structure 8 between the vertical dielectric plate 72 and the horizontal dielectric plate 71. Specifically, there are square convex structures at the two corners of the vertical dielectric plate 72, and there are square through holes on the horizontal dielectric plate at the insertion structure 8.

[0059] In summary, by adjusting and optimizing the length, width, and height of the rectangular dielectric resonator 1, the dimensions and positions of the U-shaped parasitic metal ring structure 2, the dimensions of the coupling slot 3, and the relative position of the feeding microstrip line 4 and the coupling slot 3, the fundamental mode of the dielectric resonator antenna and the omnidirectional radiation mode of the U-shaped parasitic metal ring can operate in the same frequency band, the beam width of the radiation pattern can be expanded, and the far-field radiation characteristics such as gain and radiation efficiency are stable.

[0060] A specific embodiment is given below:

[0061] 1. The rectangular dielectric resonator 1 is made of a ceramic material with a relative dielectric constant of 9.5. The length of the rectangular dielectric resonator 1 is 16 mm, the width is 16 mm, and the height is 9 mm.

[0062] 2. The two vertical dielectric plates 72 and the horizontal dielectric plate 71 are both Rogers 4003 plates. The horizontal double-sided copper-clad dielectric plate 71 is square with a side length of 50 mm and a thickness of 0.813 mm. The vertical single-sided copper-clad dielectric plate 7 is rectangular with a length of 28.4 mm, a width of 9 mm, and a thickness of 0.813 mm.

[0063] 3. The length of the U-shaped parasitic metal ring structure 2 located on one side of the vertical single-sided copper-clad dielectric plate 72 is 28.4 mm, the width is 8.8 mm, and the ends of the second metal strip 22 and the third metal strip 23 are 1.2 mm away from the upper surface of the horizontal dielectric plate 71.

[0064] 4. The antenna ground plane 5 is square with a side length of 50 mm.

[0065] 5. The width of the feeding microstrip line 4 is 1.65 mm.

[0066] The results of the antenna in this embodiment are as follows:

[0067] Frequency: 5.5 GHz;

[0068] Reflection coefficient: ≤ -10 dB;

[0069] Half-power beam width in the E-plane: ≥ 230°;

[0070] Gain: ≥ 2 dBi

[0071] Figure 4 is the parameter curve of the port reflection coefficient of the antenna disclosed in the present invention. The operating bandwidth of this antenna is 5.4 - 5.6 GHz, and the reflection coefficient is less than -10 dB.

[0072] Figure 5 are the two main-plane radiation patterns of the antenna disclosed in Embodiment 1 of the present invention at a frequency of 5.5 GHz, and their half-power beam widths are 234° and 140° respectively.

[0073] Figure 6 It is the gain parameter curve of the antenna disclosed in Embodiment 1 of the invention. The maximum gain is about 3 dBi, and the gain fluctuation within the operating frequency band is less than 1 dB.

[0074] As mentioned above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A wide-beam dielectric resonator antenna unit based on dual magnetic currents, characterized in that: It comprises a rectangular dielectric resonator (1), a gate-shaped parasitic metal ring structure (2), a feeding gap (3), a feeding network (4), a floor (5), an SMA connector (6) and a dielectric plate (7); The dielectric plate (7) comprises a horizontal dielectric plate (71) connected to the bottom of the floor (5) and a vertical dielectric plate (72) vertically connected to the floor (5) and the horizontal dielectric plate (71) and located on both sides of the rectangular dielectric resonator (1); the number of the gate-shaped parasitic metal ring structure (2) and the number of the vertical dielectric plate (72) are both two, and one gate-shaped parasitic metal ring structure (2) is connected to one vertical dielectric plate (72) and faces the rectangular dielectric resonator (1); The gate-shaped parasitic metal ring structure (2) comprises a first metal strip (21) extending along the length direction of the vertical dielectric plate (72), and a second metal strip (22) and a third metal strip (23) vertically connected to the first metal strip (21) and extending toward the horizontal dielectric plate (71), wherein the horizontal center of the first metal strip (21) is located on an extended surface of the upper surface of the rectangular dielectric resonator (1), and the vertical centers of the second metal strip (22) and the third metal strip (23) are both located on an extended surface of the side surface of the rectangular dielectric resonator (1); The feeding slot (3) is etched at the center of the floor (5) and is located at the bottom center of the rectangular dielectric resonator (1); the feeding network (4) is connected to the bottom surface of the horizontal dielectric plate (71) and the input end is connected to the side-feeding SMA connector (6), and the output end is located at the bottom of the feeding slot (3); the side-feeding SMA connector (6) is connected to one end of the floor (5); Energy is fed in from the port (6) and transmitted along the feeding network (4) to the feeding slot (3) and the rectangular dielectric resonator (1); the gate-shaped parasitic metal ring structures (2) on both sides obtain part of the energy from the rectangular dielectric resonator (1) through near-field coupling, thereby generating radiation in the horizontal direction.

2. The wide-beam dielectric resonator antenna unit based on dual magnetic current according to claim 1, characterized in that: By combining the directional radiation of the fundamental mode of the rectangular dielectric resonator (1) and the omnidirectional radiation of the gate-shaped parasitic metal ring structure (2), and then matching the phase, a wide beam characteristic of the E-plane radiation pattern can be achieved.

3. The wide-beam dielectric resonator antenna unit based on dual magnetic current according to claim 1, characterized in that: The impedance matching degree of the antenna is regulated by adjusting the size of the feeding slot (3) and the relative position of the feeding slot (3) and the microstrip line in the feeding network (4).

4. The wide-beam dielectric resonator antenna unit based on dual magnetic current according to claim 1, characterized in that: The antenna resonant frequency is adjusted by adjusting the size of the rectangular dielectric resonator (1).

5. The wide-beam dielectric resonator antenna unit based on dual magnetic current according to claim 1, characterized in that: The large-angle radiation energy is adjusted by adjusting the size of the gate-shaped parasitic metal ring structure (2), and the coupling energy phase is regulated by the distance between the gate-shaped parasitic metal ring structure (2) and the rectangular dielectric resonator (1); The shape and width of the antenna unit's directivity pattern are controlled by adjusting the large-angle radiation energy and the coupled energy phase.

6. The wide-beam dielectric resonator antenna unit based on dual magnetic current according to claim 1, characterized in that: The rectangular dielectric resonator (1) is an axisymmetric structure, and the gate-shaped parasitic metal ring structure (2) and the feeding network (4) are also symmetrically distributed; The first metal strip (21) extends along the x-direction, and the second metal strip (22) and the third metal strip (23) both extend along the z-direction; The feeding slot (3) is a rectangular slot with a long side extending along the y direction; The floor (5) is a metal sheet; It also includes a plug-in structure (8) for connecting the vertical medium plate (72) to the horizontal medium plate (71), the plug-in structure (8) including four rectangular medium holes connected to the horizontal medium plate (71) and a protruding medium block connected to the end of the vertical medium plate (72), and an opening for the medium block to pass through is provided on the floor (5).

7. The wide-beam dielectric resonator antenna unit based on dual magnetic current according to claim 1, characterized in that: The material of the rectangular dielectric resonator (1) is ceramic with a dielectric constant of 9.5; The horizontal dielectric plate (71) and the vertical dielectric plate (72) are both Rogers 4003 plates, the horizontal dielectric plate (71) is a double-sided PCB board, the vertical dielectric plate (72) is a single-sided PCB board, and the gate-shaped parasitic metal ring structure (2) is etched on the vertical dielectric plate (72).

8. The wide-beam dielectric resonator antenna unit based on dual magnetic current according to claim 1, characterized in that: The rectangular dielectric resonator (1) has a length of 16 mm, a width of 16 mm and a height of 9 mm; The gate-shaped parasitic metal ring structure (2) has a length of 28.4 mm and a width of 8.8 mm; The width of the feed network (4) is 1.65 mm; The floor (5) is a square metal plate with a side length of 50 mm; The flange base of the SMA connector (6) is welded to the floor (5), and the coaxial core is welded to the input end of the feed network (4); The horizontal medium plate (71) is a cube with a side length of 50 mm and a thickness of 0.813 mm; the vertical medium plate (72) is a cuboid with a length of 28.4 mm, a width of 9 mm and a thickness of 0.813 mm.

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