Millimeter wave antenna with flat-topped radiation beam

Abstract

The invention provides a millimeter wave antenna with a flat-top radiation beam. The millimeter wave antenna comprises an upper-layer insulating dielectric substrate and a lower-layer insulating dielectric substrate which are stacked up and down, a dielectric resonator antenna and an air slot are arranged on the upper-layer insulating dielectric substrate, the air slot is arranged at the periphery of the dielectric resonator antenna, and the dielectric resonator antenna is separated from the outside through the air slot; the lower surface of the upper-layer insulating dielectric substrate is provided with an upper-layer metal grounding plate, and the upper surface of the lower-layer insulating dielectric substrate is provided with a lower-layer metal grounding plate; a rectangular feed slot and two rectangular slots are etched in each of the upper metal grounding plate and the lower metal grounding plate, and the rectangular slots are parallel to the rectangular feed slots; the lower surface of the lower layer insulating medium substrate is provided with a radiation metal patch, and the radiation metal patch is provided with a feed structure. The antenna has the excellent characteristics of simple feeding, compact structure, easy integration, flat-top radiation and the like, and can be widely applied to 5G / B5G millimeter wave communication scenes.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and more particularly to a millimeter-wave antenna with a flat-top radiating beam, especially a compact millimeter-wave antenna with a flat-top radiating beam. Background Technology

[0002] Compared to the congested microwave communication frequency bands, millimeter-wave frequency bands offer a wider available absolute bandwidth, supporting ultra-high-speed and ultra-large-capacity data transmission. Currently, 5G millimeter-wave communication technology has become one of the research hotspots both domestically and internationally. Flat-top beam antennas, due to their ability to achieve equal flux radiation and low sidelobes within a certain spatial range, are gradually being widely used in space communication and wireless power transmission systems. Specifically, flat-top beam antennas with narrower beamwidths are suitable for microwave wireless power transmission and base station antennas, while those with wider beamwidths are suitable for access points and user terminals in high-data-rate wireless local area networks.

[0003] Array technology is the most direct method to achieve flat-top beamforming antennas. While this method can produce a good flat-top radiating beam, it typically requires a complex feed network. Alternatively, loading techniques can also be used to generate flat-top radiating beams, such as lens antennas and metasurface antennas. These antennas are excited by a single feed source and have a simple feed network; however, they usually have a high profile, making efficient integration with RF circuitry difficult.

[0004] Patent document CN118213764A discloses a millimeter-wave broadband dielectric resonator antenna, including at least one millimeter-wave broadband dielectric resonator antenna element. The antenna element comprises a first dielectric substrate, a metal ground plane, a second dielectric substrate, and a third dielectric substrate arranged sequentially. A feeding mechanism is connected to the first dielectric substrate. A slot is formed in the metal ground plane. The third dielectric substrate has air slot elements and air via elements penetrating the third dielectric substrate. In this antenna, the second and third dielectric substrates form a dielectric resonator structure. By creating air slot elements and air via elements in the third dielectric substrate, the four resonant modes of the antenna element are uniformly distributed within the target frequency range. However, this patent document still suffers from the drawback of having a "high profile, making efficient integration with radio frequency circuits impossible." Summary of the Invention

[0005] In view of the deficiencies in the prior art, the purpose of this invention is to provide a millimeter-wave antenna with a flat-top radiating beam.

[0006] A millimeter-wave antenna with a flat-top radiating beam provided by the present invention includes: an upper insulating dielectric substrate and a lower insulating dielectric substrate stacked on top of each other.

[0007] A dielectric resonator antenna and an air slot are disposed on the upper insulating dielectric substrate. The air slot is disposed around the dielectric resonator antenna, and the dielectric resonator antenna is separated from the outside world through the air slot.

[0008] The lower surface of the upper insulating dielectric substrate is provided with an upper metal ground plane, and the upper surface of the lower insulating dielectric substrate is provided with a lower metal ground plane.

[0009] Both the upper metal ground plane and the lower metal ground plane are etched with one rectangular power supply slot and two rectangular slots, and the rectangular slots are parallel to the rectangular power supply slots.

[0010] A radiating metal patch is disposed on the lower surface of the lower insulating dielectric substrate, and a power feeding structure is disposed on the radiating metal patch.

[0011] Preferably, a ring of metal short-circuit pins is provided around the periphery of the air slot;

[0012] A ring-shaped metal patch is printed on the upper surface of the upper insulating dielectric substrate, and the ring-shaped metal patch is located above the metal short-circuit pin.

[0013] Preferably, the metal short-circuit pins surrounding the air slot are arranged in a rectangular pattern.

[0014] Preferably, the dielectric resonator antenna is rectangular;

[0015] An air slot is formed at each of the four right-angle positions of the dielectric resonator antenna, and the air slot is an L-shaped slot.

[0016] A connection structure is provided on each of the four sides of the dielectric resonator antenna, and the dielectric resonator antenna is connected to the upper insulating dielectric substrate through the four connection structures.

[0017] Each of the connection structures is located between two adjacent air slots along the circumference of the dielectric resonator antenna and is connected to the two adjacent air slots.

[0018] Preferably, the four air slots are four structures with the same shape and size;

[0019] The four connection structures are four structures with the same shape and size;

[0020] The four connection structures are respectively located at the midpoints of the four sides of the dielectric resonator antenna;

[0021] The inner right-angle structures of the four air slots are respectively attached to the four right-angle structures of the dielectric resonator antenna.

[0022] Preferably, the power supply structure includes interconnected metal feed lines and rectangular metal branches.

[0023] Preferably, the metal feed line is a 50-ohm metal feed line.

[0024] Preferably, the upper insulating dielectric substrate has a relative permittivity of 6.15 and a loss angle of 0.0019.

[0025] The lower insulating dielectric substrate has a relative permittivity of 2.2 and a loss angle of 0.0009.

[0026] Preferably, the materials of the annular metal patch, the upper metal ground plane, the lower metal ground plane, and the radiating metal patch are all copper;

[0027] The thickness of the annular metal patch, the upper metal ground plane, the lower metal ground plane, and the radiating metal patch is all 0.017 mm.

[0028] Preferably, the width w1 of the dielectric resonator antenna is 3.8 mm, and the length l1 of the dielectric resonator antenna is 4.6 mm.

[0029] The width of the annular metal patch is w2 = 7 mm, and the length of the annular metal patch is l2 = 7.6 mm;

[0030] The width w3 of the connection structure at the junction of the dielectric resonator antenna and the upper insulating dielectric substrate is 0.4 mm;

[0031] The width of the air trough, w4, is 0.5 mm.

[0032] The length l of the upper insulating dielectric substrate g The width w of the upper insulating dielectric substrate is 21.5 mm. g It is 18.6mm;

[0033] The length l of the rectangular power supply gap s1 =2.8mm, the width w of the rectangular power supply gap s1 =1mm;

[0034] The length l of the rectangular slit s2 = 4.8mm, the width w of the rectangular slit s2 =0.6mm;

[0035] The length l of the metal feed line of the feed structure f1 =10.8mm, the width w of the metal feed line of the feed structure f1 =0.7mm;

[0036] The length l of the rectangular metal branch of the power supply structure f2 =2.4mm, the width w of the rectangular metal branch of the power supply structure f2 =2.2mm.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. The antenna of the present invention operates in the high-frequency millimeter-wave band commonly used in 5G communication. The antenna structure is made of copper-clad dielectric substrate. The overall structure can be processed and simply spliced ​​using traditional PCB technology, making it easy to manufacture and inexpensive.

[0039] 2. Compared with similar antennas, the antenna of this invention achieves the characteristics of a flat-top beam, has a simple feeding method, small size, and is easy to manufacture, and has high application value.

[0040] 3. This invention has excellent characteristics such as simple power supply, compact structure, easy integration and flat-top radiation, and can be widely used in 5G / B5G millimeter wave communication scenarios. Attached Figure Description

[0041] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0042] Figure 1 This is a three-dimensional structural schematic diagram of the millimeter-wave antenna with a flat-top radiating beam according to the present invention.

[0043] Figure 2 This is a schematic diagram of the top structure of the upper insulating dielectric substrate of the millimeter-wave antenna with a flat-top radiating beam according to the present invention.

[0044] Figure 3 This is a schematic diagram of the slot structure located at the bottom of the upper insulating dielectric substrate and the top of the lower insulating dielectric substrate of the millimeter-wave antenna with a flat-top radiating beam of the present invention.

[0045] Figure 4 This is a schematic diagram of the feeding structure of the millimeter-wave antenna with a flat-top radiating beam of the present invention, located at the bottom of the lower insulating dielectric substrate.

[0046] Figure 5 The reflection coefficient diagram of the millimeter-wave antenna with a flat-top radiating beam of the present invention is shown.

[0047] Figure 6A , 6B This is the radiation pattern of the millimeter-wave antenna with a flat-top radiating beam according to the present invention.

[0048] The diagram shows:

[0049] Air duct 1 Rectangular metal branch 612

[0050] Metal short-circuit pin 2 Upper insulating dielectric substrate 7

[0051] Annular metal patch 3 Lower insulating dielectric substrate 8

[0052] Upper metal ground plane 4, dielectric resonator antenna 9

[0053] Lower metal ground plane 5 Connection structure 91

[0054] Radiation metal patch 6, rectangular feed gap 10

[0055] Power supply structure 61 Rectangular slot 11

[0056] Metal feeder 611 Detailed Implementation

[0057] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0058] Example 1

[0059] like Figures 1 to 5 As shown, this embodiment provides a millimeter-wave antenna with a flat-top radiating beam, including: an upper insulating dielectric substrate 7 and a lower insulating dielectric substrate 8 stacked vertically; a dielectric resonator antenna 9 and an air slot 1 are disposed on the upper insulating dielectric substrate 7, the air slot 1 is disposed around the dielectric resonator antenna 9, and the dielectric resonator antenna 9 is separated from the outside world through the air slot 1; an upper metal ground plane 4 is disposed on the lower surface of the upper insulating dielectric substrate 7, and a lower metal ground plane 5 is disposed on the upper surface of the lower insulating dielectric substrate 8; a rectangular feed slot 10 and two rectangular slots 12 are etched on both the upper metal ground plane 4 and the lower metal ground plane 5, the rectangular slots 12 being parallel to the rectangular feed slots 10; a radiating metal patch 6 is disposed on the lower surface of the lower insulating dielectric substrate 8, and a feed structure 61 is disposed on the radiating metal patch 6.

[0060] The dielectric resonator antenna 9 is rectangular. An air slot 1, L-shaped, is formed at each of the four right-angle positions of the dielectric resonator antenna 9. A connecting structure 91 is provided on each of the four sides of the dielectric resonator antenna 9, connecting the antenna to the upper insulating dielectric substrate 7 via these four connecting structures 91. Each connecting structure 91 is located between two adjacent air slots 1 along the circumference of the dielectric resonator antenna 9 and is connected to the two adjacent air slots 1. The four air slots 1 are identical in shape and size. The four connecting structures 91 are also identical in shape and size. The four connecting structures 91 are located at the midpoints of the four sides of the dielectric resonator antenna 9. The inner right-angle structures of the four air slots 1 are respectively fitted to the four right-angle structures of the dielectric resonator antenna 9.

[0061] A ring of metal short-circuit pins 2 is arranged around the air tank 1; a ring-shaped metal patch 3 is printed on the upper surface of the upper insulating dielectric substrate 7, and the ring-shaped metal patch 3 is located above the metal short-circuit pins 2. The ring of metal short-circuit pins 2 around the air tank 1 is rectangularly distributed.

[0062] The power supply structure 61 includes interconnected metal feed lines 611 and rectangular metal branches 612. The metal feed line 61 is a 50-ohm metal feed line. The upper insulating dielectric substrate 6 has a relative permittivity of 6.15 and a loss angle of 0.0019; the lower insulating dielectric substrate 7 has a relative permittivity of 2.2 and a loss angle of 0.0009. The annular metal patch 3, the upper metal ground plane 4, the lower metal ground plane 5, and the radiating metal patch 6 are all made of copper; the thickness of each of these components is 0.017 mm.

[0063] The dielectric resonator antenna 9 has a width w1 = 3.8 mm and a length l1 = 4.6 mm; the annular metal patch 3 has a width w2 = 7 mm and a length l2 = 7.6 mm; the connection structure 91 at the junction of the dielectric resonator antenna 9 and the upper insulating dielectric substrate 7 has a width w3 = 0.4 mm; the air slot 1 has a width w4 = 0.5 mm; and the upper insulating dielectric substrate 7 has a length l1 = 4.6 mm. g The width w of the upper insulating dielectric substrate 7 is 21.5 mm. g The length is 18.6mm; the length l of the rectangular feed gap 10 is... s1 =2.8mm, the width w of the rectangular power supply gap 10 s1 =1mm; the length l of the rectangular slit 12 s2 = 4.8mm, width w of rectangular gap 12 s2 =0.6mm; the length l of the metal feed line 611 of the feed structure 61 f1=10.8mm, the width w of the metal feed line 611 of the feed structure 61 f1 =0.7mm; the length l of the rectangular metal branch 612 of the power supply structure 61 f2 =2.4mm, the width w of the rectangular metal branch 612 of the power supply structure 61 f2 =2.2mm.

[0064] Working Principle: The millimeter-wave antenna in this embodiment employs substrate integration technology and utilizes the principle of mode superposition to design an easily integrated millimeter-wave flat-top beam dielectric resonator antenna. This antenna generates radiation by resonating electromagnetic waves within the dielectric block. In this embodiment, the electromagnetic signal passes through the microstrip line (i.e., feed structure 61) on the bottom layer of the lower insulating dielectric substrate 7, and is coupled to the dielectric resonator antenna in the upper dielectric substrate through the gaps (i.e., rectangular feed gaps 10 and 12) on the upper and lower metal ground planes 4 and 5, thereby radiating outward. This embodiment simultaneously excites the fundamental mode of the coupling gaps (i.e., rectangular feed gaps 10 and 12) and the third mode of the dielectric resonator antenna 9, and combines the two modes in an appropriate ratio to generate flat-top beam characteristics through far-field radiation superposition. The flat-top beam dielectric resonator antenna of this embodiment is mainly composed of low-loss dielectric material and has the characteristics of easy excitation, diverse modes, high radiation efficiency, and easy integration, making it an excellent antenna type suitable for millimeter-wave communication.

[0065] The dielectric resonator antenna in this embodiment is mainly composed of a low-loss dielectric material. It utilizes the resonance of electromagnetic waves in the dielectric to generate radiation, and has characteristics such as easy excitation, diverse modes, and high radiation efficiency, making it an excellent antenna type suitable for millimeter-wave communication. This embodiment, based on substrate integration technology and employing a mode combination method, realizes a millimeter-wave substrate-integrated dielectric resonator antenna with a flat-top radiating beam.

[0066] Example 2

[0067] Those skilled in the art can understand this embodiment as a more specific description of Embodiment 1.

[0068] This embodiment provides a compact millimeter-wave antenna with a flat-top radiating beam, comprising:

[0069] The upper and lower insulating dielectric substrates are the upper insulating dielectric substrate 7 and the lower insulating dielectric substrate 8, respectively.

[0070] The dielectric resonator antenna 9 is located on the upper insulating dielectric substrate 7;

[0071] The dielectric resonator antenna 9 is separated from the outside world by an air slot;

[0072] The outer layer of the air duct 1 has a ring of rectangularly distributed metal short-circuit pins 2;

[0073] On the upper surface of the upper insulating dielectric substrate 7, a layer of annular metal patch 3 is printed above the metal short-circuit pin 2;

[0074] Two metal ground planes are disposed on the lower surface of the upper insulating dielectric substrate 7 and the upper surface of the lower insulating dielectric substrate 8, namely the upper metal ground plane 4 and the lower metal ground plane 5.

[0075] Both metal ground planes are etched with a rectangular power supply slot 10 and two rectangular slots 12 parallel to the rectangular power supply slot 10.

[0076] Radiation metal patch 6 disposed on the lower surface of the lower insulating dielectric substrate 7;

[0077] A power feeding structure 61 is provided on the radiating metal patch 6.

[0078] Furthermore, the radiating metal patch 6 includes a 50-ohm metal feed line 611 and a rectangular metal stub 612, wherein the metal feed line 611 is a microstrip line.

[0079] Furthermore, the upper insulating dielectric substrate 7 has a relative permittivity of 6.15 and a loss angle of 0.0019, while the lower insulating dielectric substrate 8 has a relative permittivity of 2.2 and a loss angle of 0.0009.

[0080] Furthermore, the materials of the annular metal patch 3, the upper metal ground plane 4, the lower metal ground plane 5, and the radiating metal patch 6 are all copper, and the thickness is approximately 0.017 mm.

[0081] To address the shortcomings of existing technologies, the purpose of this embodiment is to provide a compact millimeter-wave antenna with a flat-top radiating beam. This antenna offers advantages such as simple structure, convenient fabrication, low cost, and a flat-top beam with fast roll-off, making it suitable for 5G wireless communication scenarios. To achieve the above-mentioned objectives and other advantages of this invention, a method of combining the slotted fundamental mode and the third mode of the dielectric resonator is utilized.

[0082] Compared with existing technologies, this embodiment offers the following advantages: the antenna operates in the high-frequency millimeter-wave band commonly used in 5G communication; the antenna structure is fabricated using a copper-clad dielectric substrate; and the overall structure can be easily fabricated and assembled using traditional PCB technology, making it convenient and inexpensive to manufacture. Compared to similar antennas, this antenna achieves a flat-top beam, has a simple feeding method, small size, and is easy to manufacture, thus possessing high practical value.

[0083] This embodiment has excellent characteristics such as simple power supply, compact structure, easy integration and flat-top radiation, and can be widely used in 5G / B5G millimeter wave communication scenarios.

[0084] Example 3

[0085] Those skilled in the art can understand this embodiment as a more specific description of Embodiment 1.

[0086] Reference Figure 1 As shown in Figure 6, this embodiment provides a compact millimeter-wave antenna with a flat-top radiating beam, comprising:

[0087] The upper and lower insulating dielectric substrates are the upper insulating dielectric substrate 7 and the lower insulating dielectric substrate 8, respectively.

[0088] The dielectric resonator antenna 9 is separated from the outside world through the air slot 1;

[0089] The outer layer of the air duct 1 has a ring of rectangularly distributed metal short-circuit pins 2;

[0090] On the upper surface of the upper insulating dielectric substrate 7, a layer of annular metal patch 3 is printed above the metal short-circuit pin 2;

[0091] Upper metal ground plane 4 and lower metal ground plane 5 are disposed on the lower surface of the upper insulating dielectric substrate 7 and the upper surface of the lower insulating dielectric substrate 7, respectively.

[0092] Both metal ground planes are etched with a rectangular power supply slot 10 and two rectangular slots 12 parallel to the rectangular power supply slot 10.

[0093] A radiating metal patch 6 is disposed on the lower surface of the lower insulating dielectric substrate 8. The radiating metal patch 6 is provided with a power feeding structure 61, which includes a metal feed line 611 and a rectangular metal branch 612.

[0094] The antenna element dimensions in this example are as follows: the width of the dielectric resonator antenna 9 is w1 = 3.8 mm, the length of the dielectric resonator antenna 9 is l1 = 4.6 mm, the width of the annular metal patch 3 is w2 = 7 mm, the length of the annular metal patch 3 is l2 = 7.6 mm, the width of the connection structure 91 at the connection between the dielectric resonator antenna 9 and the upper insulating dielectric substrate 7 is w3 = 0.4 mm, the width of the air slot 1 is w4 = 0.5 mm, and the length of the upper insulating dielectric substrate 7 is l1 = 4.6 mm. g The width w of the upper insulating dielectric substrate 7 is 21.5 mm. g The length l of the rectangular feed gap 10 is 18.6mm. s1 =2.8mm, the width w of the rectangular power supply gap 10 s1 =1mm, the length l of the parallel rectangular slits 12 s2 = 4.8mm, the width w of the parallel rectangular slits 12 s2 =0.6mm, length l of metal feed line 611f1 =10.8mm, width w of metal feed line 611 f1 =0.7mm, length l of rectangular metal branch 612 f2 =2.4mm, width w of rectangular metal branch 612 f2 =2.2mm.

[0095] like Figure 4 As shown, the radiating metal patch 6 includes a 50-ohm metal feed line 611 and a rectangular metal stub 612 located at the end of the metal feed line 611. Simulation using HFSS software revealed that adjusting l... s1 The frequency position can be adjusted, and w f1 and l f1 This will affect the antenna impedance matching. By adjusting the various size parameters of the antenna, the antenna can be made to operate near the 28GHz frequency point in the millimeter wave band used by 5G.

[0096] Furthermore, the upper insulating dielectric substrate 7 has a relative permittivity of 6.15 and a loss angle of 0.0019, while the lower insulating dielectric substrate 8 has a relative permittivity of 2.2 and a loss angle of 0.0009.

[0097] Furthermore, the materials of the annular metal patch 3, the upper metal ground plane 4, the lower metal ground plane 5, and the radiating metal patch 6 are all copper, and the thickness is approximately 0.017 mm.

[0098] like Figure 5 Figure 6 shows the reflection coefficient of the frequency characteristics of this embodiment. The horizontal axis represents the frequency variable in GHz, and the vertical axis represents the reflection coefficient variable in dB. As shown in Figure 6, the -10dB bandwidth of this invention is 14.1% (27.7GHz~29.7GHz). Figure 6 shows the radiation patterns of this embodiment in the E-plane and H-plane. As can be seen from the figure, the 1dB beamwidth in the E-plane and H-plane of this embodiment can reach 68° and 76° respectively, the gain can reach 7.5dB, and the roll-off can reach 0.5dB / ° and 0.33dB / ° respectively.

[0099] In summary, the millimeter-wave antenna of this embodiment has the advantages of simple feeding, compact structure, easy integration and good flat-top radiation characteristics, and can be widely used in 5G / B5G millimeter-wave communication systems.

[0100] This invention has excellent characteristics such as simple power supply, compact structure, easy integration and flat-top radiation, and can be widely used in 5G / B5G millimeter wave communication scenarios.

[0101] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0102] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A millimeter-wave antenna with a flat-top radiating beam, characterized in that, include: An upper insulating dielectric substrate (7) and a lower insulating dielectric substrate (8) are stacked vertically. The upper insulating dielectric substrate (7) is provided with a dielectric resonator antenna (9) and an air slot (1). The air slot (1) is located around the dielectric resonator antenna (9). The dielectric resonator antenna (9) is separated from the outside world through the air slot (1). The lower surface of the upper insulating dielectric substrate (7) is provided with an upper metal ground plane (4), and the upper surface of the lower insulating dielectric substrate (8) is provided with a lower metal ground plane (5). The upper metal ground plane (4) and the lower metal ground plane (5) are both etched with a rectangular power supply slot (10) and two rectangular slots (12), and the rectangular slots (12) are parallel to the rectangular power supply slots (10); The lower surface of the lower insulating dielectric substrate (8) is provided with a radiating metal patch (6), and a power feeding structure (61) is provided on the radiating metal patch (6).

2. The millimeter-wave antenna with a flat-top radiating beam according to claim 1, characterized in that, A ring of metal short-circuit pins (2) is provided around the air trough (1); The upper surface of the upper insulating dielectric substrate (7) is printed with a ring-shaped metal patch (3), which is located above the metal short-circuit pin (2).

3. The millimeter-wave antenna with a flat-top radiating beam according to claim 2, characterized in that, The metal short-circuit pins (2) surrounding the air slot (1) are arranged in a rectangular pattern.

4. The millimeter-wave antenna with a flat-top radiating beam according to claim 1, characterized in that, The dielectric resonator antenna (9) is rectangular; An air slot (1) is provided at each of the four right-angle positions of the dielectric resonator antenna (9), and the air slot (1) is an L-shaped slot; A connection structure (91) is provided on each of the four sides of the dielectric resonator antenna (9), and the dielectric resonator antenna (9) is connected to the upper insulating dielectric substrate (7) through the four connection structures (91). Each of the connection structures (91) is located between two adjacent air slots (1) along the circumference of the dielectric resonator antenna (9) and is connected to the two adjacent air slots (1).

5. The millimeter-wave antenna with a flat-top radiating beam according to claim 4, characterized in that, The four air slots (1) are four structures with the same shape and size; The four connection structures (91) are four structures with the same shape and size; The four connection structures (91) are located at the midpoints of the four sides of the dielectric resonator antenna (9); The inner right-angle structures of the four air slots (1) are respectively attached to the four right-angle structures of the dielectric resonator antenna (9).

6. The millimeter-wave antenna with a flat-top radiating beam according to claim 1, characterized in that, The power supply structure (61) includes interconnected metal feed lines (611) and rectangular metal branches (612).

7. The millimeter-wave antenna with a flat-top radiating beam according to claim 6, characterized in that, The metal feed (61) is a 50-ohm metal feed.

8. The millimeter-wave antenna with a flat-top radiating beam as described in claim 1, characterized in that, The upper insulating dielectric substrate (6) has a relative permittivity of 6.15 and a loss angle of 0.0019. The lower insulating dielectric substrate (7) has a relative permittivity of 2.2 and a loss angle of 0.0009.

9. The millimeter-wave antenna with a flat-top radiating beam according to claim 2, characterized in that, The materials of the annular metal patch (3), the upper metal ground plane (4), the lower metal ground plane (5), and the radiating metal patch (6) are all copper; The thickness of the annular metal patch (3), the upper metal ground plane (4), the lower metal ground plane (5), and the radiating metal patch (6) is 0.017 mm.

10. The millimeter-wave antenna with a flat-top radiating beam according to claim 2, characterized in that, The width w1 of the dielectric resonator antenna (9) is 3.8 mm, and the length l1 of the dielectric resonator antenna (9) is 4.6 mm. The width of the annular metal patch (3) is w2 = 7 mm, and the length of the annular metal patch (3) is l2 = 7.6 mm; The width w3 of the connection structure (91) at the connection between the dielectric resonator antenna (9) and the upper insulating dielectric substrate (7) is 0.4 mm; The width w4 of the air trough (1) is 0.5 mm; The length l of the upper insulating dielectric substrate (7) g The width w of the upper insulating dielectric substrate (7) is 21.5 mm. g It is 18.6mm; The length l of the rectangular power supply gap (10) s1 =2.8mm, the width w of the rectangular power supply gap (10) s1 =1mm; The length l of the rectangular slit (12) s2 = 4.8mm, the width w of the rectangular slit (12) s2 =0.6mm; The length l of the metal feed line (611) of the feed structure (61) f1 =10.8mm, the width w of the metal feed line (611) of the feed structure (61) is 10.8mm. f1 =0.7mm; The length l of the rectangular metal branch (612) of the power supply structure (61) f2 = 2.4mm, the width w of the rectangular metal branch (612) of the feed structure (61) f2 =2.2mm.

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