Ultra-wideband antenna

Abstract

The present invention discloses an ultra-wideband antenna, which relates to the field of wireless communication technology. The ultra-wideband antenna comprises a first substrate and a second substrate. The front of the first substrate is provided with a first radiation patch, and the back of the first substrate is provided with a second radiation patch; the front of the second substrate is provided with a third radiation patch, and the back of the second substrate is provided with a fourth radiation patch. The second substrate intersects the first substrate vertically, and the first radiation patch and the second radiation patch are symmetrically distributed on the first substrate with the intersection line of the second substrate and the first substrate as the symmetry axis, and the third radiation patch and the fourth radiation patch are symmetrically distributed on the second substrate with the intersection line of the second substrate and the first substrate as the symmetry axis; the shape of the first radiation patch, the second radiation patch, the third radiation patch and the fourth radiation patch on the side close to the intersection line are all fold line structures. Through this arrangement, the bandwidth of the antenna is increased, and the polarization of the antenna is realized at the same time, and the performance of the antenna is enhanced.

Description

Technical Field

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

[0002] With the growing demand for data, devices with larger data capacity are constantly being created. As the core component of the entire communication system, the development of ultra-wideband and miniaturization of antennas has become a very important direction at present. As a non-frequency-variable antenna, Vivaldi has a wide working bandwidth, excellent symmetry of the radiation pattern and strong directivity. At the same time, due to the simple and symmetrical structure of the Vivaldi antenna, after placing it crosswise, a dual-polarized antenna with high isolation can be achieved. Therefore, the research on ultra-wideband dual-polarized Vivaldi antenna is of great significance.

[0003] However, the current technical means of ultra-wideband antennas are not mature enough. The existing ultra-wideband antennas are designed with a narrow frequency band and are not compatible with high-frequency communication transmissions or radar systems. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an ultra-wideband antenna, which increases the bandwidth of the antenna and realizes the polarization of the antenna, thereby enhancing the performance of the antenna.

[0005] An ultra-wideband antenna according to an embodiment of the present invention includes:

[0006] A first substrate, with a first radiation patch on the front side and a second radiation patch on the back side;

[0007] A second substrate, a third radiation patch is provided on the front side, and a fourth radiation patch is provided on the back side, the second substrate intersects the first substrate vertically, the first radiation patch and the second radiation patch are symmetrically distributed on the first substrate with the intersection line of the second substrate and the first substrate as the symmetry axis, and the third radiation patch and the fourth radiation patch are symmetrically distributed on the second substrate with the intersection line of the second substrate and the first substrate as the symmetry axis; the shapes of the first radiation patch, the second radiation patch, the third radiation patch and the fourth radiation patch on the side close to the intersection line are all fold line structures.

[0008] The ultra-wideband antenna according to the embodiment of the present invention has at least the following beneficial effects: in the ultra-wideband antenna of the present invention, the first radiation patch and the second radiation patch are symmetrically distributed on the first substrate with the intersection line of the second substrate and the first substrate as the symmetry axis, and the third radiation patch and the fourth radiation patch are symmetrically distributed on the second substrate with the intersection line of the second substrate and the first substrate as the symmetry axis. Since the shapes of the first radiation patch, the second radiation patch, the third radiation patch and the fourth radiation patch on the side close to the intersection line are all fold line structures, the distance between the points on the fold line structure and the intersection line of the second substrate and the first substrate gradually increases from the starting point to the end point, so that the distance between the two curves of the first radiation patch and the second radiation patch from the starting point to the end point gradually increases, and the distance between the two curves of the third radiation patch and the fourth radiation patch from the starting point to the end point gradually increases, thereby increasing the bandwidth of the antenna while ensuring that the size of the antenna remains unchanged, so that the antenna has good performance between the bandwidth of 0.85 GHz and 7.3 GHz, increasing the bandwidth of the antenna, and realizing the polarization of the antenna at the same time, enhancing the performance of the antenna.

[0009] According to some embodiments of the present invention, a director is provided on the front side of the first substrate, and the director is symmetrically arranged with the intersection line of the second substrate and the first substrate as the symmetry axis.

[0010] According to some embodiments of the present invention, a first parallel feed line is provided on the lower side of the front side of the first substrate, one end of the first parallel feed line is connected to the first radiation patch, and the other end extends to the edge of the first substrate; a second parallel feed line is provided on the lower side of the front side of the second substrate, one end of the second parallel feed line is connected to the third radiation patch, and the other end extends to the edge of the second substrate; a third parallel feed line is provided on the reverse side of the second substrate, one end of the third parallel feed line is connected to the fourth radiation patch.

[0011] According to some embodiments of the present invention, a first antenna connector is provided at an edge of the first substrate close to the first parallel feeder line, and a second antenna connector is provided at an edge of the second substrate close to the second parallel feeder line.

[0012] According to some embodiments of the present invention, a first ground plane is provided on the lower side of the reverse surface of the first substrate, and one side of the first ground plane is flush with the lower edge of the first substrate; a second ground plane is provided on the lower side of the reverse surface of the second substrate, and one side of the second ground plane is connected to the other end of the third parallel feed line, and the other side of the second ground plane is flush with the lower edge of the second substrate.

[0013] According to some embodiments of the present invention, a first slit is formed on the upper side of the first substrate, a second slit corresponding to the first slit is formed on the lower side of the second substrate, and the first substrate and the second substrate intersect vertically through the first slit and the second slit.

[0014] According to some embodiments of the present invention, there is a first gap between the first gap and the second gap, so that the third radiation patch and the second parallel feed line, and the fourth radiation patch and the third parallel feed line are connected through the first gap.

[0015] According to some embodiments of the present invention, one side of the first radiation patch and the second radiation patch are both arranged at the edge of the upper side of the first substrate, and the other side are both arranged at the lower side of the first gap; one side of the third radiation patch and the fourth radiation patch are both arranged at the edge of the upper side of the second substrate, and the other side are both arranged at the upper side of the first gap.

[0016] According to some embodiments of the present invention, the first radiation patch, the second radiation patch, the third radiation patch and the fourth radiation patch all include a plurality of polygonal patches, and a plurality of the polygonal patches are close to the edge of the intersection line to form the fold line structure.

[0017] According to some embodiments of the present invention, a plurality of the polygonal patches within a same radiation patch are arranged at intervals, and a patch resistor is provided between two adjacent polygonal patches.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation to the technical solution of the present invention.

[0020] Figure 1 is a schematic diagram of an ultra-wideband antenna provided by an embodiment of the present invention;

[0021] Figure 2 is a side schematic diagram of an ultra-wideband antenna provided by an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of the front side of the first substrate provided by an embodiment of the present invention;

[0023] Figure 4 is a schematic diagram of the reverse side of the first substrate provided by an embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of the front side of the second substrate provided by an embodiment of the present invention;

[0025] Figure 6 is a schematic diagram of the reverse side of the second substrate provided by an embodiment of the present invention;

[0026] Figure 7 is a schematic diagram of current flow in the second substrate provided by an embodiment of the present invention;

[0027] Figure 8 is a schematic diagram of electromagnetic waves radiating outward from the second substrate provided by an embodiment of the present invention;

[0028] Fig. 9 is an S11 test result diagram obtained by testing the first antenna in the first substrate provided by an embodiment of the present invention;

[0029] Fig.10 is a graph of S11 test results obtained by testing the second antenna in the second substrate provided by an embodiment of the present invention;

[0030] Fig.11 are the E-plane and H-plane directional diagrams of the antenna in the first substrate at a frequency of 6.5 GHz provided by an embodiment of the present invention;

[0031] Fig.12 These are the E-plane and H-plane radiation patterns of the antenna in the second substrate at a frequency of 6.5 GHZ provided by an embodiment of the present invention.

[0032] Reference numerals:

[0033] Ultra-wideband antenna 10;

[0034] A first substrate 100 and a second substrate 200;

[0035] A front surface 110 of a first substrate, a first radiation patch 111, and a first parallel feed line 112;

[0036] The reverse side 120 of the first substrate, the second radiation patch 121, and the first ground plane 122;

[0037] Director 130, first slot 140, first antenna connector 150, first polygonal patch 160, second polygonal patch 170, third polygonal patch 180;

[0038] A front surface 210 of a second substrate, a third radiation patch 211, and a second parallel feed line 212;

[0039] The reverse side 220 of the second substrate, the fourth radiation patch 221, the third parallel feed line 222, and the second ground plane 223;

[0040] The second gap 230 , the second antenna joint 240 , the fourth polygonal patch 250 , the fifth polygonal patch 260 , and the sixth polygonal patch 270 . DETAILED DESCRIPTION

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features.

[0043] In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two elements, indirect connection, or the interaction relationship between two elements.

[0044] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0045] With the growing demand for data, devices with larger data capacity are constantly being created. As the core component of the entire communication system, the development of ultra-wideband and miniaturization of antennas has become a very important direction at present. As a non-frequency-variable antenna, Vivaldi has a wide working bandwidth, excellent symmetry of the radiation pattern and strong directivity. At the same time, due to the simple and symmetrical structure of the Vivaldi antenna, after placing it crosswise, a dual-polarized antenna with high isolation can be achieved. Therefore, the research on ultra-wideband dual-polarized Vivaldi antenna is of great significance.

[0046] However, the current technical means of ultra-wideband antennas are not mature enough. The existing ultra-wideband antennas are designed with a narrow frequency band and are not compatible with high-frequency communication transmissions or radar systems.

[0047] Based on this, an embodiment of the present invention provides an ultra-wideband antenna 10, which increases the bandwidth of the antenna and realizes polarization of the antenna, thereby enhancing the performance of the antenna.

[0048] Reference below Figures 1 to 8 An ultra-wideband antenna 10 according to an embodiment of the present invention is described.

[0049] Reference Figures 1 to 8 The ultra-wideband antenna 10 includes: a first substrate 100 and a second substrate 200, wherein a first radiation patch 111 is disposed on the front side 110 of the first substrate, and a second radiation patch 121 is disposed on the back side; a third radiation patch 211 is disposed on the front side 210 of the second substrate, and a fourth radiation patch 221 is disposed on the back side; the second substrate 200 intersects the first substrate 100 vertically, the first radiation patch 111 and the second radiation patch 121 are symmetrically distributed on the first substrate 100 with the intersection line of the second substrate 200 and the first substrate 100 as the symmetry axis, and the third radiation patch 211 and the fourth radiation patch 221 are symmetrically distributed on the second substrate 200 with the intersection line of the second substrate 200 and the first substrate 100 as the symmetry axis; the shapes of the first radiation patch 111, the second radiation patch 121, the third radiation patch 211 and the fourth radiation patch 221 close to the intersection line are all fold line structures.

[0050] In the ultra-wideband antenna 10 of the present invention, the distance between the point on the fold line structure and the intersection line of the second substrate 200 and the first substrate 100 gradually increases from the starting point to the end point, so that the distance between the two curves of the first radiation patch 111 and the second radiation patch 121 from the starting point to the end point gradually increases, and the distance between the two curves of the third radiation patch 211 and the fourth radiation patch 221 from the starting point to the end point gradually increases, thereby increasing the bandwidth of the antenna while ensuring that the size of the antenna remains unchanged, so that the antenna has good performance between the bandwidth of 0.85 GHz and 7.3 GHz, increasing the bandwidth of the antenna, and realizing the polarization of the antenna at the same time, enhancing the performance of the antenna.

[0051] It should be noted that the first radiation patch 111 is attached to the front surface 110 of the first substrate, the second radiation patch 121 is attached to the back surface 220 of the second substrate, the third radiation patch 211 is attached to the front surface 210 of the second substrate, and the fourth radiation patch 221 is attached to the back surface 220 of the second substrate.

[0052] It should be noted that the first radiation patch 111, the second radiation patch 121, the third radiation patch 211 and the fourth radiation patch 221 are all made of metal materials; in the present embodiment, the first radiation patch 111, the second radiation patch 121, the third radiation patch 211 and the fourth radiation patch 221 are all made of copper; in other embodiments, the first radiation patch 111, the second radiation patch 121, the third radiation patch 211 and the fourth radiation patch 221 may also be made of other metal materials, and are not limited to the present embodiment.

[0053] It should be noted that, refer to Figure 7 and Figure 8 The intersection line of the second substrate 200 and the first substrate 100 is set as the center line, and the first radiation patch 111, the second radiation patch 121, the third radiation patch 211 and the fourth radiation patch 221 are all in a fold line structure on one side adjacent to the center line. The fold line structure has a starting point and an end point, and the distance between the points on the fold line structure and the center line gradually increases from the starting point to the end point. The starting point of the folded line structure of the first radiation patch 111 is the bottom of the first radiation patch 111 near the center line, and the end point is the edge of the upper side of the first radiation patch 111 near the center line; the starting point of the folded line structure of the second radiation patch 121 is the bottom of the second radiation patch 121 near the center line, and the end point is the edge of the upper side of the second radiation patch 121 near the center line; the starting point of the folded line structure of the third radiation patch 211 is the bottom of the third radiation patch 211 near the center line, and the end point is the edge of the upper side of the third radiation patch 211 near the center line; the starting point of the folded line structure of the fourth radiation patch 221 is the bottom of the fourth radiation patch 221 near the center line, and the end point is the edge of the upper side of the fourth radiation patch 221 near the center line. Through this arrangement, the ultra-wideband antenna 10 has good radiation directivity, high radiation efficiency, simple overall structure, and convenient manufacturing.

[0054] In the related art, for antennas above 6G, Rogers plates are mostly used as dielectric materials. However, Rogers materials are expensive, which makes the cost of the antenna high. In this embodiment, both the first substrate 100 and the second substrate 200 are made of FR4 material. The FR4 substrate is cheap and easy to process, which greatly reduces the processing cost.

[0055] It should be noted that the ultra-wideband antenna 10 in the present invention has a relatively small size and can cover the lowest cutoff frequency below 0.85 GHz.

[0056] It should be noted that the first radiation patch 111 and the second radiation patch 121 on the first substrate 100 form a first antenna, and the third radiation patch 211 and the fourth radiation patch 221 on the second substrate 200 form a second antenna.

[0057] It should be noted that, refer to Fig. 9 and Fig.10 , respectively, experimentally tested the first antenna and the second antenna, and obtained the S11 test results of the first antenna and the second antenna. From the test results, it can be seen that the radiation efficiency of the first antenna and the second antenna is higher than the international requirements. The higher the radiation efficiency of the antenna, the better the call effect. Fig.11 and Fig.12 , which are the two-dimensional radiation patterns of the first antenna and the second antenna at 6.5 GHZ respectively.

[0058] It should be noted that Figure 7 The current flow diagram of the second antenna is shown in the figure. The current flow of the first antenna is similar to that of the first antenna. There are two-sided currents in the first and second antennas. Figure 7 As shown in the current flow direction, the first antenna generates Figure 8 The electromagnetic waves radiating outward are shown.

[0059] Reference Figure 3 It can be understood that the front surface 110 of the first substrate is provided with a director 130, and the director 130 is symmetrically arranged with the intersection line of the second substrate 200 and the first substrate 100 as the symmetry axis.

[0060] It should be noted that the director 130 is attached to the upper side of the front surface 110 of the first substrate, and one side of the director 130 is flush with the upper edge of the first substrate 100. The director 130 is used to enhance the directivity of the antenna.

[0061] It should be noted that the director 130 includes a first director 130 patch and a second director 130 patch, and the first director 130 patch and the second director 130 patch are symmetrically arranged with the center line as the symmetry axis.

[0062] Reference Figures 3 to 6 It can be understood that a first parallel feed line 112 is provided on the lower side of the front side 110 of the first substrate, one end of the first parallel feed line 112 is connected to the first radiation patch 111, and the other end extends to the edge of the first substrate 100; a second parallel feed line 212 is provided on the lower side of the front side 210 of the second substrate, one end of the second parallel feed line 212 is connected to the third radiation patch 211, and the other end extends to the edge of the second substrate 200, and a third parallel feed line 222 is provided on the reverse side 220 of the second substrate, and one end of the third parallel feed line 222 is connected to the fourth radiation patch 221.

[0063] It should be noted that the first parallel feed line 112 , the second parallel feed line 212 and the third parallel feed line 222 are all used for power feeding. This arrangement makes the power feeding of the ultra-wideband antenna 10 simple and convenient to manufacture.

[0064] It should be noted that one end of the first parallel feed line 112 is connected to the bottom of the first radiation patch 111 near the center line, one end of the second parallel feed line 212 is connected to the bottom of the third radiation patch 211 near the center line, and one end of the third parallel feed line 222 is connected to the bottom of the fourth radiation patch 221 near the center line.

[0065] In some embodiments, a fourth parallel feeding line is attached to the front surface 110 of the first substrate, and one end of the fourth parallel feeding line is connected to the second radiation patch 121 .

[0066] Reference Figures 3 to 6 It can be understood that a first antenna connector 150 is provided at an edge of the first substrate 100 close to the first parallel feed line 112 , and a second antenna connector 240 is provided at an edge of the second substrate 200 close to the second parallel feed line 212 .

[0067] It should be noted that the first antenna connector 150 is a signal source for each patch on the first substrate 100, and the second antenna connector 240 is a signal source for each patch on the second substrate 200. Optionally, both the first antenna connector 150 and the second antenna connector 240 are SMA connectors.

[0068] It should be noted that the other end of the first parallel feed line 112 extends to the edge of the first substrate 100, and this end of the first parallel feed line 112 is connected to the first antenna connector 150; the other end of the second parallel feed line 212 extends to the edge of the second substrate 200, and this end of the second parallel feed line 212 is connected to the second antenna connector 240.

[0069] Reference Figure 4 and Figure 6 It can be understood that a first ground plane 122 is provided on the lower side of the reverse surface 120 of the first substrate, and one side of the first ground plane 122 is flush with the lower edge of the first substrate 100; a second ground plane 223 is provided on the lower side of the reverse surface 220 of the second substrate, and one side of the second ground plane 223 is connected to the other end of the third parallel feed line 222, and the other side of the second ground plane 223 is flush with the lower edge of the second substrate 200.

[0070] It should be noted that the first ground plane 122 is used to provide a reference plane for the second radiation patch 121 , and the portion of the first ground plane 122 that exceeds the second radiation patch 121 is used to radiate the energy of electromagnetic waves.

[0071] It should be noted that the first antenna connector 150 is connected to the first parallel feeder 112 and the first ground plane 122 ; the second antenna connector 240 is connected to the second parallel feeder 212 and the second ground plane 223 .

[0072] In some embodiments, the other side of the first ground plane 122 is connected to the second radiation patch 121; in other embodiments, a fourth parallel feed line is attached to the front side 110 of the first substrate, one end of the fourth parallel feed line is connected to the second radiation patch 121, and the other end is connected to the other side of the first ground plane 122, so that the first ground plane 122 is connected to the second radiation patch 121 through the fourth parallel feed line.

[0073] It should be noted that, in the present embodiment, the first ground plane 122 and the second ground plane 223 are both square, and the sides of the first ground plane 122 and the second ground plane 223 away from the center line are both flush with the edge of the reverse surface 120 of the first substrate, and the sides close to the center line are both flush with the center line; in other embodiments, the first ground plane 122 and the second ground plane 223 are both rectangular; in other embodiments, the first ground plane 122 and the second ground plane 223 may also be other shapes, not limited to the present embodiment.

[0074] Reference Figures 1 to 6 It can be understood that a first slit 140 is opened on the upper side of the first substrate 100, and a second slit 230 corresponding to the first slit 140 is opened on the lower side of the second substrate 200, and the first substrate 100 and the second substrate 200 intersect vertically through the first slit 140 and the second slit 230.

[0075] It should be noted that a first slot 140 is formed by slotting the top of the first substrate 100, and a second slot 230 is formed by slotting the bottom of the second substrate 200, so that the first substrate 100 and the second substrate 200 can be spliced. The first substrate 100 and the second substrate 200 both adopt a top-to-bottom symmetrical structure, forming a current form similar to the parallel-type vivaldi antenna.

[0076] It should be noted that the first radiation patch 111 is connected to the first parallel feed line 112 at one end of the front surface 110 of the first substrate away from the first slot 140. In some embodiments, a fourth parallel feed line is provided on the back surface 120 of the first substrate, and the second radiation patch 121 is connected to the fourth parallel feed line at one end of the back surface 120 of the first substrate away from the first slot 140; in other embodiments, the second radiation patch 121 is directly connected to the first ground plane 122 at one end of the front surface 110 of the first substrate away from the first slot 140.

[0077] Reference Figure 1It can be understood that there is a first gap between the first gap 140 and the second gap 230, so that the third radiation patch 211 and the second parallel feed line 212, and the fourth radiation patch 221 and the third parallel feed line 222 are connected through the first gap.

[0078] Reference Figure 1 It can be understood that one side of the first radiation patch 111 and the second radiation patch 121 are both arranged at the edge of the upper side of the first substrate 100, and the other side is both arranged at the lower side of the first gap 140; one side of the third radiation patch 211 and the fourth radiation patch 221 are both arranged at the edge of the upper side of the second substrate 200, and the other side is both arranged on the upper side of the first gap 140.

[0079] In some embodiments, the other sides of the third radiation patch 211 and the fourth radiation patch 221 are both disposed at the first gap; in other embodiments, the other sides of the third radiation patch 211 and the fourth radiation patch 221 are both disposed above the first gap.

[0080] It can be understood that the first radiation patch 111 , the second radiation patch 121 , the third radiation patch 211 and the fourth radiation patch 221 all include a plurality of polygonal patches, and the edges of the plurality of polygonal patches close to the intersection lines form a fold line structure.

[0081] In some embodiments, reference Figures 3 to 6The first radiation patch 111, the second radiation patch 121, the third radiation patch 211 and the fourth radiation patch 221 are all composed of three polygonal patches, the first radiation patch 111 and the second radiation patch 121 are all composed of the first polygonal patch 160, the second polygonal patch 170 and the third polygonal patch 180 pieces, the third radiation patch 211 and the fourth radiation patch 221 are all composed of the fourth polygonal patch 250, the fifth polygonal patch 260 and the sixth polygonal patch 270 pieces. The first polygonal patch 160, the second polygonal patch 170 and the third polygonal patch 180 are combined together to form a fold line structure near the edge of the center line, and the distance between the points on the fold line structure and the intersection line of the second substrate 200 and the first substrate 100 gradually increases from the starting point to the end point, so that the distance between the two curves of the first radiation patch 111 and the second radiation patch 121 from the starting point to the end point gradually increases, and the distance between the two curves of the third radiation patch 211 and the fourth radiation patch 221 from the starting point to the end point gradually increases, thereby increasing the bandwidth of the antenna while ensuring that the size of the antenna remains unchanged, so that the antenna has good performance between the bandwidth of 0.85GHz and 7.3GHz, increasing the bandwidth of the antenna, and realizing the polarization of the antenna at the same time, enhancing the performance of the antenna; the fourth polygonal patch 250, the fifth polygonal patch 260 and the sixth polygonal patch 270 are combined together to form a fold line structure near the edge of the center line. In other embodiments, the first radiation patch 111 , the second radiation patch 121 , the third radiation patch 211 and the fourth radiation patch 221 may also be composed of other numbers of polygonal patches, and are not limited to this embodiment.

[0082] It should be noted that the polygonal patch may be an irregular-shaped polygonal patch or a regular-shaped polygonal patch.

[0083] In some embodiments, reference Figures 3 to 6 In order to facilitate the opening of the first gap 140 and the second gap 230 so that the first substrate 100 and the second substrate 200 can be better spliced ​​together, the first polygonal patch 160, the second polygonal patch 170 and the third polygonal patch 180 are respectively larger than the fourth polygonal patch 250, the fifth polygonal patch 260 and the sixth polygonal patch 270; in other embodiments, the first polygonal patch 160, the second polygonal patch 170 and the third polygonal patch 180 are respectively smaller than the fourth polygonal patch 250, the fifth polygonal patch 260 and the sixth polygonal patch 270; in other embodiments, the first radiation patch 111 and the third radiation patch 211, the second radiation patch 121 and the fourth radiation patch 221 are the same in shape and size.

[0084] Reference Figure 1It can be understood that several polygonal patches in the same radiation patch are arranged at intervals, and a patch resistor is provided between two adjacent polygonal patches.

[0085] It should be noted that a patch resistor is provided between two adjacent polygonal patches so that the two adjacent polygonal patches are connected through the patch resistor. The patch resistor is used to absorb part of the electromagnetic wave echo, which can better limit the magnetic field strength of the ultra-wideband antenna 10.

[0086] In some embodiments, there is a second gap between the first polygonal patch 160 and the second polygonal patch 170, and between the second polygonal patch 170 and the third polygonal patch 180, there is a third gap between the fourth polygonal patch 250 and the fifth polygonal patch 260, and between the fifth polygonal patch 260 and the sixth polygonal patch 270, and patch resistors are provided at the midpoints of the second gaps and the third gaps.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0088] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

[0089] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An ultra-wideband antenna, characterized in that: include: A first substrate, with a first radiation patch on the front side and a second radiation patch on the back side; A second substrate, a third radiation patch is provided on the front side, and a fourth radiation patch is provided on the back side, the second substrate intersects the first substrate perpendicularly, the first radiation patch and the second radiation patch are symmetrically distributed on the first substrate with the intersection line of the second substrate and the first substrate as the symmetry axis, and the third radiation patch and the fourth radiation patch are symmetrically distributed on the second substrate with the intersection line of the second substrate and the first substrate as the symmetry axis; the shapes of the first radiation patch, the second radiation patch, the third radiation patch and the fourth radiation patch on the side close to the intersection line are all fold line structures; Among them, a first parallel feed line is provided on the lower side of the front side of the first substrate, one end of the first parallel feed line is connected to the first radiation patch, and the other end extends to the edge of the first substrate; a second parallel feed line is provided on the lower side of the front side of the second substrate, one end of the second parallel feed line is connected to the third radiation patch, and the other end extends to the edge of the second substrate, and a third parallel feed line is provided on the back side of the second substrate, one end of the third parallel feed line is connected to the fourth radiation patch.

2. The ultra-wideband antenna according to claim 1, characterized in that: A director is provided on the front side of the first substrate, and the director is symmetrically arranged with the intersection line of the second substrate and the first substrate as the symmetry axis.

3. The ultra-wideband antenna according to claim 1, characterized in that: A first antenna connector is disposed at an edge of the first substrate close to the first parallel feeder line, and a second antenna connector is disposed at an edge of the second substrate close to the second parallel feeder line.

4. The ultra-wideband antenna according to claim 1, characterized in that: A first ground plane is provided on the lower side of the reverse surface of the first substrate, and one side of the first ground plane is flush with the lower edge of the first substrate; a second ground plane is provided on the lower side of the reverse surface of the second substrate, one side of the second ground plane is connected to the other end of the third parallel feed line, and the other side of the second ground plane is flush with the lower edge of the second substrate.

5. The ultra-wideband antenna according to claim 1, characterized in that: A first slit is formed on the upper side of the first substrate, a second slit corresponding to the first slit is formed on the lower side of the second substrate, and the first substrate and the second substrate intersect vertically through the first slit and the second slit.

6. The ultra-wideband antenna according to claim 5, characterized in that: A first gap exists between the first gap and the second gap, so that the third radiation patch and the second parallel feed line, and the fourth radiation patch and the third parallel feed line are connected through the first gap.

7. The ultra-wideband antenna according to claim 5, characterized in that: One side of the first radiation patch and the second radiation patch are both arranged at the edge of the upper side of the first substrate, and the other side are both arranged at the lower side of the first gap; one side of the third radiation patch and the fourth radiation patch are both arranged at the edge of the upper side of the second substrate, and the other side are both arranged on the upper side of the first gap.

8. The ultra-wideband antenna according to any one of claims 1 to 7, characterized in that: The first radiation patch, the second radiation patch, the third radiation patch and the fourth radiation patch all include a plurality of polygonal patches, and a plurality of the polygonal patches are close to the edge of the intersection line to form the fold line structure.

9. The ultra-wideband antenna according to claim 8, characterized in that: The plurality of polygonal patches in the same radiation patch are arranged at intervals, and a patch resistor is arranged between two adjacent polygonal patches.

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