Ultra-wideband antenna

Abstract

The present invention discloses an ultra-wideband antenna. The ultra-wideband antenna includes: a dielectric substrate; an antenna radiator, the antenna radiator is arranged on the first side of the dielectric substrate, and a notch is arranged on the edge of the antenna radiator; an embedded metal layer, the embedded metal layer is arranged on the first side of the dielectric substrate, and along the thickness direction of the ultra-wideband antenna, the orthographic projection of the embedded metal layer and the orthographic projection of the notch at least partially overlap, and the orthographic projection of the embedded metal layer and the orthographic projection of the antenna radiator do not overlap; a bottom metal layer, the bottom metal layer is arranged on the second side of the dielectric substrate, the bottom metal layer includes a bottom metal ground and a bottom feed pad, the bottom metal ground is electrically connected to the embedded metal layer, and the bottom feed pad is electrically connected to the antenna radiator; the first side of the dielectric substrate is opposite to the second side of the dielectric substrate. The present invention can achieve the purpose of widening the frequency band and improving the efficiency of the ultra-wideband antenna without increasing the size of the ultra-wideband antenna.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, and in particular to an ultra-wideband antenna. Background Art

[0002] Antennas, such as Ultra Wide Band (UWB) antennas, transmit extremely low-power signals over a wider spectrum. They have the advantages of strong penetration, low power consumption, good anti-multipath effect, and high security. They play a vital role in the field of modern communications and are widely used in radar, detection, measurement, position remote sensing and tracking, and communication systems.

[0003] However, most existing ultra-wideband antennas adopt a single radiating patch design, and the bandwidth is relatively narrow under single resonance. The existing methods for expanding the antenna bandwidth mainly include reducing the Q value, modifying the equivalent circuit to a multi-resonance loop, and improving the feeding method. Reducing the Q value is mainly achieved by increasing the thickness of the substrate, reducing the relative dielectric constant, and increasing the dielectric loss angle; the multi-resonance loop increases the standing wave ratio bandwidth of the antenna by changing the shape of the patch, such as using slots, U-shaped gaps, and additional coupling patches; improving the feeding form uses electromagnetic coupling and additional impedance matching networks to achieve wide bandwidth. However, the efficiency of the above-mentioned ultra-wideband antenna patch will decrease after the slot is opened, and reducing the dielectric constant, increasing the thickness of the substrate, and adding coupling and impedance matching networks will also increase the lateral and longitudinal dimensions of the antenna, which is not conducive to the miniaturization requirements of the antenna. Summary of the invention

[0004] The present invention provides an ultra-wideband antenna, so as to achieve the purpose of widening the frequency band and improving the efficiency of the ultra-wideband antenna without increasing the size of the ultra-wideband antenna.

[0005] According to one aspect of the present invention, an ultra-wideband antenna is provided, the ultra-wideband antenna comprising:

[0006] dielectric substrate;

[0007] An antenna radiator, the antenna radiator is arranged on the first side of the dielectric substrate, and a notch is arranged at an edge of the antenna radiator;

[0008] A ground-embedded metal layer, the ground-embedded metal layer is disposed on the first side of the dielectric substrate, and along the thickness direction of the ultra-wideband antenna, the orthographic projection of the ground-embedded metal layer at least partially overlaps with the orthographic projection of the notch, and the orthographic projection of the ground-embedded metal layer does not overlap with the orthographic projection of the antenna radiator;

[0009] A bottom metal layer, the bottom metal layer is arranged on the second side of the dielectric substrate, the bottom metal layer includes a bottom metal ground and a bottom feed pad, the bottom metal ground is electrically connected to the embedded metal layer, and the bottom feed pad is electrically connected to the antenna radiator; the first side of the dielectric substrate is opposite to the second side of the dielectric substrate.

[0010] Optionally, along the thickness direction of the ultra-wideband antenna, the orthographic projection of the ground-embedded metal layer surrounds the orthographic projection of the antenna radiator.

[0011] Optionally, the antenna radiator is arranged in the same layer as the ground-embedded metal layer.

[0012] Optionally, the antenna radiator and the ground-embedded metal layer are arranged in different layers, and an isolation layer is arranged between the antenna radiator and the ground-embedded metal layer.

[0013] Optionally, the ultra-wideband antenna further includes a top metal ground, which is arranged in the same layer as the antenna radiator and surrounds the antenna radiator; the top metal ground is electrically connected to the embedded metal layer.

[0014] Optionally, a plurality of conductive through holes are provided at the edge of the dielectric substrate, the plurality of conductive through holes surround the dielectric substrate, and the embedded metal layer is electrically connected to the bottom metal layer through the conductive through holes.

[0015] Optionally, along the thickness direction of the ultra-wideband antenna, a portion where the orthographic projection of the ground-embedded metal layer overlaps with the orthographic projection of the notch has the same shape as the orthographic projection of the corresponding notch.

[0016] Optionally, the antenna radiator is rectangular or circular with a notch.

[0017] Optionally, the shape of the notch is a triangle, a semi-ellipse or an irregular shape.

[0018] Optionally, along the thickness direction of the ultra-wideband antenna, the orthographic projection of the embedded metal layer semi-surrounds the orthographic projection of the antenna radiator, and a plurality of conductive through holes are provided at the edge of the dielectric substrate and corresponding to the portion of the embedded metal layer, and the embedded metal layer is electrically connected to the underlying metal layer through the conductive through holes.

[0019] The technical solution of the embodiment of the present invention adopts an ultra-wideband antenna comprising: a dielectric substrate; an antenna radiator, the antenna radiator is arranged on the first side of the dielectric substrate, and a notch is arranged at the edge of the antenna radiator; an embedded metal layer, the embedded metal layer is arranged on the first side of the dielectric substrate, and along the thickness direction of the ultra-wideband antenna, the orthographic projection of the embedded metal layer and the orthographic projection of the notch at least partially overlap, and the orthographic projection of the embedded metal layer and the orthographic projection of the antenna radiator do not overlap; a bottom metal layer, the bottom metal layer is arranged on the second side of the dielectric substrate, the bottom metal layer includes a bottom metal ground and a bottom feeding pad, the bottom metal ground is electrically connected to the embedded metal layer, and the bottom feeding pad is electrically connected to the antenna radiator; the first side of the dielectric substrate is opposite to the second side of the dielectric substrate. By providing a ground-embedded metal layer, the coupling between the antenna radiator and the grounding structure is increased, the resonant frequency point of the ultra-wideband antenna can be lowered, and the reference ground of the electric field radiation edge of the ultra-wideband antenna is increased, thereby improving the bandwidth and efficiency of the ultra-wideband antenna; and since there is no need to increase the lateral and longitudinal dimensions of the ultra-wideband antenna, it is only necessary to design the ultra-wideband antenna into the form of the antenna provided in this embodiment based on the original antenna size, thereby achieving the improvement of the bandwidth and efficiency of the ultra-wideband antenna without increasing the size of the ultra-wideband antenna.

[0020] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the structure of an ultra-wideband antenna provided by an embodiment of the present invention;

[0023] Figure 2 An exploded view of an ultra-wideband antenna provided by an embodiment of the present invention;

[0024] Figure 3 An exploded view of another ultra-wideband antenna provided by an embodiment of the present invention;

[0025] Figure 4 An exploded view of another ultra-wideband antenna provided by an embodiment of the present invention;

[0026] Figure 5 An exploded view of another ultra-wideband antenna provided by an embodiment of the present invention;

[0027] Figure 6 An exploded view of another ultra-wideband antenna provided by an embodiment of the present invention;

[0028] Figure 7 An exploded view of another ultra-wideband antenna provided by an embodiment of the present invention;

[0029] Figure 8 An exploded view of another ultra-wideband antenna provided by an embodiment of the present invention;

[0030] Fig. 9 An exploded view of another ultra-wideband antenna provided by an embodiment of the present invention;

[0031] Fig.10 An exploded view of another ultra-wideband antenna provided by an embodiment of the present invention;

[0032] Fig.11 This is the simulation diagram of the scattering parameters of the traditional single radiating antenna;

[0033] Fig.12 A scattering parameter simulation diagram of an ultra-wideband antenna provided in an embodiment of the present invention;

[0034] Fig.13 Simulation diagram of radiation efficiency of traditional single radiating patch antenna;

[0035] Fig.14 A simulation diagram of the radiation efficiency of an ultra-wideband antenna provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims 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 interchanged 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, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] Figure 1 A schematic diagram of the structure of an ultra-wideband antenna provided by an embodiment of the present invention, Figure 2 An exploded view of an ultra-wideband antenna provided by an embodiment of the present invention, Figure 2 and Figure 1 Corresponding, Combining Figure 1 and Figure 2 The ultra-wideband antenna provided in this embodiment includes: a dielectric substrate 1; an antenna radiator 2, the antenna radiator 2 is arranged on the first side of the dielectric substrate 1, and a notch is arranged at the edge of the antenna radiator 2; an embedded metal layer 21, the embedded metal layer 21 is arranged on the first side of the dielectric substrate 1, and along the thickness direction of the ultra-wideband antenna, the orthographic projection of the embedded metal layer 21 and the orthographic projection of the notch at least partially overlap, and the orthographic projection of the embedded metal layer 21 and the orthographic projection of the antenna radiator 2 do not overlap; a bottom metal layer 3, the bottom metal layer 3 is arranged on the second side of the dielectric substrate 1, the bottom metal layer 3 includes a bottom metal ground 31 and a bottom feeding pad 32, the bottom metal ground 31 is electrically connected to the embedded metal layer 21, and the bottom feeding pad 32 is electrically connected to the wire radiator 2; the first side of the dielectric substrate 1 is opposite to the second side of the dielectric substrate 1.

[0039] Specifically, the dielectric substrate 1 can be, for example, a glass fiber cloth copper clad plate (flame retardant type 4, FR4), and the dielectric substrate 1 has a first side and a second side opposite to each other. The antenna radiator 2 and the embedded metal layer 21 are located on the first side of the dielectric substrate 1. The antenna radiator 2 and the embedded metal layer 21 are both metal and can be formed by lamination or spraying. The antenna radiator 2 has a notch at its edge that is concave toward the center point of the antenna radiator 2, such as Figure 2As shown in , the antenna radiator 2 can be a rectangular structure with a notch. Of course, in some other embodiments, it can also be a circular structure with a notch. Along the thickness direction of the ultra-wideband antenna, the projection of the embedded metal layer 21 overlaps with the projection of the notch, and the projection of the embedded metal layer 21 does not overlap with the projection of the antenna radiator 2; in other words, the embedded metal layer 21 fills the notch, and the embedded metal layer 21 does not contact the antenna radiator 2; the bottom feeding pad 32 feeds the antenna radiator 2; the bottom metal ground 31 and the embedded metal layer 21 are electrically connected to form the grounding structure of the antenna. In this embodiment, by providing the embedded metal layer 21, the coupling between the antenna radiator 2 and the grounding structure is increased, which can reduce the resonant frequency point of the ultra-wideband antenna, thereby improving the bandwidth of the ultra-wideband antenna; in addition, the introduction of the embedded metal layer 21 increases the reference ground of the electric field radiation edge of the ultra-wideband antenna, and the antenna efficiency is improved; and since there is no need to increase the lateral and longitudinal dimensions of the ultra-wideband antenna, it is only necessary to design the ultra-wideband antenna into the form of the ultra-wideband antenna provided in this embodiment based on the original ultra-wideband antenna size, thereby achieving the improvement of the bandwidth and efficiency of the ultra-wideband antenna without increasing the size of the ultra-wideband antenna.

[0040] The technical solution of this embodiment adopts an ultra-wideband antenna comprising: a dielectric substrate; an antenna radiator, the antenna radiator is arranged on the first side of the dielectric substrate, and a notch is arranged at the edge of the antenna radiator; an embedded metal layer, the embedded metal layer is arranged on the first side of the dielectric substrate, and along the thickness direction of the ultra-wideband antenna, the orthographic projection of the embedded metal layer and the orthographic projection of the notch at least partially overlap, and the orthographic projection of the embedded metal layer and the orthographic projection of the antenna radiator do not overlap; a bottom metal layer, the bottom metal layer is arranged on the second side of the dielectric substrate, the bottom metal layer includes a bottom metal ground and a bottom feeding pad, the bottom metal ground is electrically connected to the embedded metal layer, and the bottom feeding pad is electrically connected to the antenna radiator; the first side of the dielectric substrate is opposite to the second side of the dielectric substrate. By providing a ground-embedded metal layer, the coupling between the antenna radiator and the grounding structure is increased, the resonant frequency point of the ultra-wideband antenna can be lowered, and the reference ground of the antenna electric field radiation edge is increased, thereby improving the bandwidth and efficiency of the ultra-wideband antenna; and since there is no need to increase the lateral and longitudinal dimensions of the ultra-wideband antenna, it is only necessary to design the ultra-wideband antenna into the form of the ultra-wideband antenna provided in this embodiment based on the original ultra-wideband antenna size, thereby achieving the improvement of the bandwidth and efficiency of the ultra-wideband antenna without increasing the size of the ultra-wideband antenna.

[0041] It can be understood that the feeding point of the bottom feeding pad 32 on the antenna radiator 2 can be close to the center of the antenna radiator 2, and the impedance of the antenna can be adjusted by adjusting the position of the feeding point. The resonant frequency wavelength of the antenna radiator 2 is 1 / 2 wavelength, and the resonant frequency of the antenna can be adjusted by adjusting the length of the portion of the antenna radiator 2 extending into the embedded metal layer 21 (which can be understood as adjusting the length of the portion of the notch pointing to the center point of the antenna radiator). Adjusting the distance from the embedded metal layer 21 to the feeding point of the antenna radiator 2 and the shape of the edge of the antenna radiator 2 close to the embedded metal layer 21 can improve the impedance bandwidth at the feeding point of the antenna radiator 2, thereby increasing the impedance bandwidth of the ultra-wideband antenna.

[0042] Continue to refer Figure 2 , along the thickness direction of the ultra-wideband antenna, the orthographic projection of the embedded metal layer 21 surrounds the orthographic projection of the antenna radiator 2 .

[0043] Specifically, in this embodiment, the antenna radiator 2 is equivalent to being surrounded by the ground-embedded metal layer 21. In this way, the metal ground outside the antenna radiator 2 and the bottom metal ground 31 form a grounding ring as a reference ground for antenna radiation, which reduces the impact of the surrounding environment of the ultra-wideband antenna on the antenna in the actual environment, thereby further improving the antenna efficiency.

[0044] Optionally, continue to refer to Figure 2 The antenna radiator 2 is arranged on the same layer as the ground-embedded metal layer 21 .

[0045] In this embodiment, the antenna radiator 2 and the ground-embedded metal layer 21 are arranged in the same layer and can be formed simultaneously without adding other film layer structures and increasing the thickness of the ultra-wideband antenna.

[0046] Optionally, Figure 3 An exploded view of another ultra-wideband antenna provided by an embodiment of the present invention is shown in FIG. Figure 3 In this embodiment, the antenna radiator 2 and the ground-embedded metal layer 21 are arranged in different layers, and an isolation layer 4 is arranged between the antenna radiator 2 and the ground-embedded metal layer 21 .

[0047] Specifically, in this embodiment, the isolation layer 4 can be the same as or different from the dielectric substrate 1 in material and thickness; the isolation layer 4 can prevent the antenna radiator 2 from short-circuiting with the ground-embedded metal layer 21. In this embodiment, the ground-embedded metal layer 21 and the antenna radiator 2 can be formed on different film layer structures, respectively, so that a short circuit between the ground-embedded metal layer 21 and the antenna radiator 2 can be further avoided.

[0048] Optionally, continue to refer to Figure 3The ultra-wideband antenna also includes a top metal ground 22, which is arranged on the same layer as the antenna radiator 2 and surrounds the antenna radiator 2; the top metal ground 22 is arranged on the same layer as the antenna radiator 2 and surrounds the antenna radiator 2; the top metal ground 22 is electrically connected to the embedded metal layer 21.

[0049] Preferably, it can be arranged that the orthographic projection of the top metal ground 22 and the orthographic projection of the gap do not overlap along the thickness direction of the ultra-wideband antenna. In other words, the top metal ground 22 does not fill the gap and only serves as a grounding. In this embodiment, by additionally providing a circle of metal grounding surface around the antenna radiator, the influence of the surrounding environment of the ultra-wideband antenna on the antenna in an actual environment can be further reduced, thereby further improving the antenna efficiency.

[0050] Optionally, continue to refer to Figure 2 A plurality of conductive through holes 11 are arranged at the edge of the dielectric substrate 1 , and the plurality of conductive through holes 11 surround the dielectric substrate 1 , and the embedded metal layer 21 is electrically connected to the bottom metal layer 3 through the conductive through holes 11 .

[0051] Specifically, in this embodiment, the embedded metal layer 21 surrounds the antenna radiator 2, so a circle of conductive through holes 11 can be set at the corresponding position of the dielectric substrate 1; the bottom and top metal layers are connected into an integral structure through the conductive through holes 11, and the solution is simple and easy to implement. At the same time, a circle of conductive through holes 11 can also form a shielding structure to prevent the antenna radiator 2 from being interfered by the outside.

[0052] Optionally, continue to refer to Figure 2 Along the thickness direction of the ultra-wideband antenna, the portion where the orthographic projection of the embedded metal layer 21 overlaps with the orthographic projection of the notch has the same shape as the orthographic projection of the corresponding notch.

[0053] Specifically, in this embodiment, the shape of the notch is an isosceles triangle, so the shape of the part of the ground-embedded metal layer 21 embedded in the notch is also an isosceles triangle; of course, the shape of the notch can also be any other shape, such as a semi-ellipse or an irregular shape, and the shape of the ground-embedded metal layer 21 embedded in the notch is also a semi-ellipse or an irregular shape. This arrangement can make the distance between each part of the ground-embedded metal layer 21 and the antenna radiator 2 roughly the same, so that the radiation intensity of the antenna radiator 2 in all directions is relatively uniform.

[0054] Optionally, Figure 4 An exploded view of another ultra-wideband antenna provided by an embodiment of the present invention is shown in FIG. Figure 4Along the thickness direction of the ultra-wideband antenna, the orthographic projection of the embedded metal layer 21 semi-surrounds the orthographic projection of the antenna radiator 2, and a plurality of conductive through holes 11 are provided at the edge of the dielectric substrate 1 and corresponding to the embedded metal layer 21, and the embedded metal layer 21 is electrically connected to the underlying metal layer 3 through the conductive through holes 11.

[0055] Specifically, in this embodiment, the ground-embedded metal layer 21 does not surround the antenna radiator 2 , but one gap corresponds to one ground-embedded metal layer 21 ; this structure can be applied when the surrounding environment of the ultra-wideband antenna has no effect on the ultra-wideband antenna.

[0056] In some other embodiments, Figure 5 As shown, Figure 5 An exploded diagram of another ultra-wideband antenna provided in an embodiment of the present invention. In this embodiment, the antenna radiator 2 is a rectangle with a notch, and the four sides of the rectangle have notches. The corresponding embedded metal layer will form four embedded structures (the part where the embedded metal layer overlaps with the projection of the notch), which can achieve the purpose of reducing the size of the antenna radiator and improving the efficiency of the antenna radiator.

[0057] In some other embodiments, Figure 6 As shown, Figure 6 The exploded view of another ultra-wideband antenna provided by the embodiment of the present invention, in this embodiment, the shape of the notch is a semi-ellipse. Figure 7 As shown, Figure 7 The exploded diagram of another ultra-wideband antenna provided by the embodiment of the present invention, in this embodiment, the shape of the notch is an irregular shape. And in the above embodiment, the antenna radiator can be a notch symmetrical about the center line, such as Figures 2 to 6 , or it can have an asymmetric gap, such as Figure 7 .

[0058] In some other embodiments, such as Figure 8 As shown, Figure 8 The exploded diagram of another ultra-wideband antenna provided by an embodiment of the present invention, the antenna of this embodiment can be a PIFA (Planar Inverted F-shaped Antenna, a planar inverted F-shaped antenna), which can be used when the size of the dielectric substrate is small Figure 8 The structure shown. Alternatively, Fig. 9 The exploded diagram of another ultra-wideband antenna provided by the embodiment of the present invention can be used when a wider bandwidth is required. Fig. 9 The structure shown in Fig. 9In the embodiment shown, the ultra-wideband antenna is a PIFA superimposed parasitic antenna and introduces a ground-embedded structure design. This method will produce two resonant frequency points. The hole in the center of the antenna radiator is the antenna short-circuit hole. The side where the antenna short-circuit hole is located is the PIFA antenna with a first resonant frequency, and the other side is the parasitic antenna with a second frequency. When the first frequency and the second frequency are close, the antenna bandwidth can be extended.

[0059] In some other embodiments, such as Fig.10 As shown, Fig.10 An exploded diagram of another ultra-wideband antenna provided in an embodiment of the present invention. In this embodiment, an additional notch toward the ground-embedded metal layer can be set in the notch portion. The notch set toward the ground-embedded metal layer can be equivalent to a microstrip line 22. The bottom feed pad can be electrically connected to the microstrip line through the feed through hole, which can make the position of the bottom feed pad and the feeding method of the antenna more flexible.

[0060] Fig.11 This is the simulation diagram of the scattering parameters of the traditional single radiating antenna. Fig.12 A scattering parameter simulation diagram of an ultra-wideband antenna provided in an embodiment of the present invention is shown in FIG. Fig.11 The ground-embedded antenna of the present invention can expand the scattering parameter bandwidth from 360MHz to 600MHz at -6dB, an increase of about 65%, without increasing the size of the ultra-wideband antenna. The antenna bandwidth is defined as the difference between the upper and lower limits of the frequency when S(1,1) = -6dB.

[0061] Fig.13 The radiation efficiency simulation diagram of the traditional single radiating patch antenna. Fig.14 A simulation diagram of the radiation efficiency of an ultra-wideband antenna provided by an embodiment of the present invention, combined with Fig.13 and Fig.14 The efficiency of the ultra-wideband antenna of this embodiment is improved by nearly 30%, and the radiation efficiency -6dB (25%) bandwidth is increased from 730MHz to 1440MHz. The scattering parameter bandwidth expansion is achieved without changing the size of the ultra-wideband antenna. The introduction of the embedded structure improves the antenna radiation efficiency and widens the efficiency bandwidth.

[0062] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0063] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultra-wideband antenna, characterized in that: The ultra-wideband antenna comprises: dielectric substrate; An antenna radiator, the antenna radiator is arranged on the first side of the dielectric substrate, and a notch is arranged at an edge of the antenna radiator; A ground-embedded metal layer, the ground-embedded metal layer is disposed on the first side of the dielectric substrate, and along the thickness direction of the ultra-wideband antenna, the orthographic projection of the ground-embedded metal layer at least partially overlaps with the orthographic projection of the notch, and the orthographic projection of the ground-embedded metal layer does not overlap with the orthographic projection of the antenna radiator; A bottom metal layer, the bottom metal layer is arranged on the second side of the dielectric substrate, the bottom metal layer comprises a bottom metal ground and a bottom feed pad, the bottom metal ground is electrically connected to the embedded metal layer, and the bottom feed pad is electrically connected to the antenna radiator; the first side of the dielectric substrate is opposite to the second side of the dielectric substrate; Along the thickness direction of the ultra-wideband antenna, the orthographic projection of the ground-embedded metal layer surrounds the orthographic projection of the antenna radiator; The antenna radiator and the ground-embedded metal layer are arranged in different layers, and an isolation layer is arranged between the antenna radiator and the ground-embedded metal layer; The ultra-wideband antenna further includes a top metal ground, which is arranged in the same layer as the antenna radiator and surrounds the antenna radiator; the top metal ground is electrically connected to the embedded metal layer; Along the thickness direction of the ultra-wideband antenna, the orthographic projection of the top metal ground does not overlap with the orthographic projection of the notch.

2. The ultra-wideband antenna according to claim 1, characterized in that: The antenna radiator is arranged on the same layer as the ground-embedded metal layer.

3. The ultra-wideband antenna according to claim 1, characterized in that: A plurality of conductive through holes are arranged at the edge of the dielectric substrate, the plurality of conductive through holes surround the dielectric substrate, and the embedded metal layer is electrically connected to the bottom metal layer through the conductive through holes.

4. The ultra-wideband antenna according to claim 1, characterized in that: Along the thickness direction of the ultra-wideband antenna, the portion where the orthographic projection of the ground-embedded metal layer overlaps with the orthographic projection of the notch has the same shape as the orthographic projection of the corresponding notch.

5. The ultra-wideband antenna according to claim 1, characterized in that: The antenna radiator is a rectangle or a circle with a notch.

6. The ultra-wideband antenna according to claim 1, characterized in that: The shape of the notch is a triangle, a semi-ellipse or an irregular shape.

7. The ultra-wideband antenna according to claim 1, characterized in that: Along the thickness direction of the ultra-wideband antenna, the orthographic projection of the embedded metal layer semi-surrounds the orthographic projection of the antenna radiator, and a plurality of conductive through holes are provided at the edge of the dielectric substrate and corresponding to the portion of the embedded metal layer, and the embedded metal layer is electrically connected to the underlying metal layer through the conductive through holes.

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