A symmetrical wideband antenna

Abstract

The invention discloses a symmetrical angle broadband antenna, comprising a radio frequency connector and a radiation plate, wherein the radio frequency connector is fixedly connected to the radiation plate; a broadband impedance matching hole and a broadband radiation angle curve slot are provided on the radiation plate, wherein the broadband radiation angle curve slot comprises a contraction slot bottom, an opening slot, and a first angle curve slot wall and a second angle curve slot wall opposite to each other, wherein the contraction slot bottom passes through the hole wall of the broadband impedance matching hole, and the opening slot passes through one side of the radiation plate, and the area of ​​the opening slot is larger than the area of ​​the contraction slot bottom. The radio frequency signal of the symmetrical angle broadband antenna is transmitted to the radiation plate by the radio frequency connector, and through the tuning of the broadband impedance matching hole, approximately non-reflection radio frequency transmission within a broadband can be achieved; then, the radio frequency signal is successively converted into a spatial electromagnetic wave along the broadband radiation angle curve slot and radiated outward, thereby achieving a broadband and high-gain radiation effect. In addition, the structure and manufacturing process are simple, the cost is low, and the application prospect is broad.

Description

Technical Field

[0001] The invention relates to the field of antennas, and in particular to a symmetrical angle broadband antenna. Background Art

[0002] Antennas used in the fields of broadband mobile communications, wireless radio frequency testing, detection and positioning have increasing requirements for miniaturization, wide bandwidth and high gain. However, there is a contradiction between the miniaturization, wide bandwidth and high gain of existing antennas, and it is difficult to meet the three indicators at the same time. Antennas that achieve wideband operation in the market are generally low-gain omnidirectional antennas; while antennas that achieve high-gain operation are generally narrow-band directional radiation antennas, which can only achieve a relative working bandwidth of 10%-20%, and most of them use complex array antennas such as microstrip array antennas and dipole array antennas. The feeding structure of such array antennas is complex and the transmission loss is large. In addition to array antennas, horn antennas also have certain advantages in directional radiation, but horn antennas usually cannot achieve frequency doubling and the preparation process is complex. In addition, antennas are generally large in size, especially when the antenna works at low frequencies, which is not suitable for use in compact environments and the cost of large-scale applications is also high. Summary of the invention

[0003] The object of the present invention is to provide a symmetrical wideband antenna to meet the requirements of antenna miniaturization, wide bandwidth and high gain.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A symmetrical wideband antenna, comprising a radio frequency connector and a radiation plate, wherein the radio frequency connector is fixedly connected to the radiation plate;

[0006] A broadband impedance matching hole and a broadband radiation angle curve groove are provided on the radiation plate. The broadband radiation angle curve groove includes a contraction groove bottom, an open groove opening, and a first angle curve groove wall and a second angle curve groove wall opposite to each other. The contraction groove bottom passes through the hole wall of the broadband impedance matching hole, and the open groove opening passes through a side surface of the radiation plate. The area of ​​the open groove opening is larger than the area of ​​the contraction groove bottom.

[0007] Optionally, the radio frequency connector comprises an outer conductor, a medium is fixedly sleeved inside the outer conductor, and a probe is fixedly sleeved inside the medium;

[0008] A dielectric hole penetrating through one side of the radiation plate is provided on the wall of the first angular curve groove; the outer conductor is fixedly provided on the side of the radiation plate provided with the dielectric hole; an end of the dielectric away from the outer conductor extends from the inner part of the outer conductor into the dielectric hole; an end of the probe away from the outer conductor extends from the inner part of the dielectric into the broadband radiation angular curve groove and is fixedly connected to the wall of the second angular curve groove.

[0009] Optionally, a probe groove is provided on the wall of the second angle curve groove; an end of the probe away from the outer conductor extends from the medium into the probe groove and is fixedly connected to the probe groove.

[0010] Optionally, the radiation plate includes a radiation substrate, the open slot passes through a side surface of the radiation substrate; the radiation substrate protrudes from the middle of the side surface away from the open slot to form a radiation convex plate; the broadband impedance matching hole is opened on the radiation convex plate, and the broadband radiation angle curve slot extends from the radiation convex plate to the radiation substrate; the outer conductor is arranged on one side surface of the radiation convex plate, and the dielectric hole passes through the first angle curve slot wall to the side surface of the radiation convex plate.

[0011] Optionally, the radiation plate includes two opposite plate surfaces and multiple side surfaces perpendicular to any of the plate surfaces, the broadband impedance matching hole penetrates the two opposite plate surfaces of the radiation plate, and the broadband radiation angle curve groove penetrates the two opposite plate surfaces of the radiation plate.

[0012] Optionally, the symmetrical angle broadband antenna further includes a guard plate frame, and the radiation plate is fixedly connected to the guard plate frame.

[0013] Optionally, the symmetrical angle broadband antenna further includes a guard plate frame, the radiation plate is fixedly connected to the guard plate frame including two vertical guard plates, and the two vertical guard plates are fixedly connected to two opposite sides of the radiation substrate;

[0014] The guard plate frame also includes two transverse guard plates, and the two sides of each transverse guard plate are respectively fixedly connected to the two vertical guard plates; the radiation substrate is located between the two transverse guard plates.

[0015] Optionally, a convex plate connecting hole is also provided on the side of the radiation convex plate having the dielectric hole; the outer conductor includes an outer conductor tube and an outer conductor seat arranged around the outer conductor tube, and the dielectric sleeve is arranged in the outer conductor tube; an outer conductor connecting hole corresponding to the convex plate connecting hole is provided on the outer conductor seat, a bolt is provided in the outer conductor connecting hole, and the bolt is threadedly connected to the convex plate connecting hole.

[0016] Optionally, the radiation substrate and the radiation convex plate are an integrally formed structure.

[0017] Optionally, the radiation plate is a copper-gold-plated radiation plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The symmetrical wide-angle antenna provided by the present invention has a wide-band impedance matching hole and a wide-band radiation angle curve slot on the radiation plate. The radio frequency signal is transmitted to the radiation plate by the radio frequency connector. Through the tuning of the wide-band impedance matching hole, the nearly reflection-free radio frequency transmission in the wide-band can be realized. After that, the radio frequency signal is successively converted into a spatial electromagnetic wave along the wide-band radiation angle curve slot and radiates outward, which can achieve a wide-band and high-gain radiation effect. In addition, the structure and manufacturing process are simple, the cost is low, and the application prospects in wireless communication fields such as 4G, 5G, millimeter wave, and ultra-wideband are broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative labor.

[0021] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0022] Figure 1 A schematic structural diagram of a symmetrical angle broadband antenna provided in an embodiment of the present invention.

[0023] Figure 2 Another schematic diagram of the structure of the symmetrical angle broadband antenna provided in an embodiment of the present invention.

[0024] Figure 3 A cross-sectional view of a radio frequency connector provided in an embodiment of the present invention.

[0025] Figure 4 The present invention provides a design result of the standing wave ratio of the symmetrical angle broadband antenna.

[0026] Figure 5 The present invention provides a design result of the radiation gain of the symmetrical angle broadband antenna provided in the embodiment of the present invention.

[0027] Illustrations: 1. Radiating plate; 101. Radiating substrate; 102. Radiating convex plate; 11. Broadband impedance matching hole; 12. Broadband radiating angular curve slot; 121. First angular curve slot wall; 122. Second angular curve slot wall; 123. Contraction slot bottom; 124. Open slot; 13. Probe slot; 14. Dielectric hole; 2. RF connector; 21. Outer conductor; 22. Dielectric; 23. Probe; 3. Guard plate frame; 31. Vertical guard plate; 32. Horizontal guard plate. DETAILED DESCRIPTION

[0028] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions 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 embodiments described below 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 are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0030] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0031] The embodiment of the present invention provides a symmetrical angle wideband antenna, comprising a radio frequency connector 2 and a radiation plate 1, wherein the radio frequency connector 2 is fixedly connected to the radiation plate 1. A broadband impedance matching hole 11 and a broadband radiation angle curve groove 12 are provided on the radiation plate 1, wherein the broadband radiation angle curve groove 12 comprises a contraction groove bottom 123, an opening groove 124, and opposite first angle curve groove walls 121 and second angle curve groove walls 122, wherein the contraction groove bottom 123 passes through the hole wall of the broadband impedance matching hole 11, and the opening groove 124 passes through one side surface of the radiation plate 1, and the area of ​​the opening groove 124 is larger than the area of ​​the contraction groove bottom 123.

[0032] In the symmetrical wide-angle broadband antenna provided by the present invention, the RF signal is transmitted from the RF connector 2 to the radiation plate 1, and through the tuning of the broadband impedance matching hole 11, approximately reflection-free RF transmission within a wide band can be achieved; then the RF signal is successively converted into spatial electromagnetic waves along the broadband radiation angle curve slot 12 and radiated outward, thereby achieving a wide-band and high-gain radiation effect.

[0033] The broadband radiation angular curve slot 12 described in the embodiment of the present invention can adopt a special curve equation such as an exponential gradient curve, a Chebyshev gradient curve, a Taylor distribution curve, etc. to design the shape of the angular curve. Different curve equations are selected according to different electrical performance requirements of the antenna. The curve design is closely related to electrical performance parameters such as the antenna operating frequency, operating bandwidth, radiation gain and standing wave ratio. Stable electrical performance parameters can be obtained by adjusting the curve equation. When the radiation curve is adjusted according to the radiation gain requirements, the overall volume of the antenna will change. In the embodiment of the present invention, the shape of the angular curve specifically adopts an exponential gradient curve: y=exp(x*a)-b, where a and b are designed constants.

[0034] Specifically, the radiation board 1 includes two opposite board surfaces and multiple side surfaces perpendicular to any of the board surfaces, the broadband impedance matching hole 11 penetrates the two opposite board surfaces of the radiation board 1, and the broadband radiation angle curve slot 12 penetrates the two opposite board surfaces of the radiation board 1. The area of ​​the open slot 124 is equal to the area of ​​the side surface of the radiation board 1 penetrated by it.

[0035] In the embodiment of the present invention, the RF connector 2 includes an outer conductor 21, a dielectric 22 is fixedly sleeved in the outer conductor 21, and a probe 23 is fixedly sleeved in the dielectric 22. A dielectric hole 14 penetrating one side of the radiation plate 1 is provided on the first angle curve groove wall 121, the outer conductor 21 is fixedly provided on the side of the radiation plate 1 provided with the dielectric hole 14, and one end of the dielectric 22 away from the outer conductor 21 extends from the outer conductor 21 into the dielectric hole 14. Specifically, the dielectric 22 can be further extended from the dielectric hole 14 into the broadband radiation angle curve groove 12 according to design requirements, and the length of the dielectric 22 in the broadband radiation angle curve groove 12 will affect the impedance of the antenna, based on which the impedance matching can be adjusted.

[0036] The end of the probe 23 away from the outer conductor 21 extends from the medium 22 into the broadband radiation angular curve groove 12, and is fixedly connected to the second angular curve groove wall 122. Specifically, a probe groove 13 is provided on the second angular curve groove wall 122, and the end of the probe 23 away from the outer conductor 21 extends from the medium 22 into the probe groove 13, and is fixedly connected to the probe groove 13. The probe 23 needs to be connected to the probe groove 13 to form electrical conduction, but in order to allow the probe 23 to extend into the probe groove 13 to complete the assembly, the size of the probe groove 13 needs to be larger than the size of the probe 23, so the present invention specifically achieves electrical conduction by soldering the probe 23 and the probe groove 13.

[0037] In the embodiment of the present invention, the RF connector 2 is a 50Ω coaxial RF connector. In the RF connector 2, the outer conductor 21 and the probe 23 are both conductors, the outer conductor 21 is fixed on one side of the radiation board 1 to form an electrical connection, and the probe 23 is welded on the second angle curve groove wall 122 to form an electrical connection with the other side of the radiation board 1, so that a balanced feeding structure is formed between the RF connector 2 and the radiation board 1. The feeding structure formed in the present invention does not require an impedance transition structure or a power distribution network used in other similar antennas, and the structure is simple.

[0038] Furthermore, in the embodiment of the present invention, by adjusting the insertion position of the probe 23 and the length of the portion thereof extending out of the medium 22, the position and size of the broadband impedance matching hole 11, and the length of the portion of the medium 22 extending out of the outer conductor 21, the characteristic impedance and the working bandwidth of the antenna can be controlled. Therefore, the feeding structure of the present invention also has the function of adjustable impedance. Among them, the insertion position of the probe 23 and the position of the broadband impedance matching hole 11 are linked, and the probe 23 is arranged beside the broadband impedance matching hole 11.

[0039] The radiation board 1 includes a radiation substrate 101, and an opening slot 124 penetrates a side surface of the radiation substrate 101. The radiation substrate 101 protrudes from the middle of the side surface away from the opening slot 124 to form a radiation convex plate 102. A broadband impedance matching hole 11 is opened on the radiation convex plate 102, and a broadband radiation angle curve slot 12 extends from the radiation convex plate 102 to the radiation substrate 101. The outer conductor 21 is arranged on a side surface of the radiation convex plate 102, and the dielectric hole 14 penetrates from the first angle curve slot wall 121 to the side surface of the radiation convex plate 102.

[0040] The side of the radiation convex plate 102 with the dielectric hole 14 is also provided with a convex plate connection hole. The outer conductor 21 includes an outer conductor cylinder and an outer conductor seat arranged around the outer conductor cylinder, and the dielectric 22 is sleeved in the outer conductor cylinder. The outer conductor seat is provided with an outer conductor connection hole corresponding to the convex plate connection hole, and a bolt is provided in the outer conductor connection hole, and the bolt is threadedly connected to the convex plate connection hole.

[0041] In the RF connector 2 provided in the embodiment of the present invention, the outer conductor 21 is fixedly connected to the radiation convex plate 102 by bolts, and the probe 23 is welded to the second angle curve groove wall 122. The feeding structure is simple and the installation consistency is high, so that the electrical performance parameters such as impedance matching and radiation efficiency are highly consistent. Other feeding methods such as microstrip line feeding and coupled feeding are greatly affected by the outside world and have poor consistency. The present invention has obvious advantages in this regard.

[0042] The radiation convex plate 102 and the radiation substrate 101 are an integrally formed structure. Specifically, the entire radiation plate 1 is integrally formed using copper-gold-plated material, and has good conductivity, small high-frequency current loss, high processing consistency, and low radiator loss, especially high radiation efficiency in the millimeter wave frequency band.

[0043] In the embodiment of the present invention, the symmetrical angular broadband antenna further includes a guard plate frame 3, and the radiation plate 1 is fixedly connected to the guard plate frame 3. The guard plate frame 3 includes two vertical guard plates 31, and the two vertical guard plates 31 are fixedly connected to two opposite sides of the radiation substrate 101. The guard plate frame 3 also includes two transverse guard plates 32, and the two sides of each transverse guard plate 32 are respectively fixedly connected to the two vertical guard plates 31. The radiation substrate 101 is located between the two transverse guard plates 32.

[0044] Two opposite sides of the radiation substrate 101 are provided with radiation substrate connection holes, and each vertical shield plate 31 is provided with a vertical shield plate first connection hole corresponding to the radiation substrate connection hole. Metal bolts pass through the vertical shield plate first connection holes and are threadedly connected to the radiation substrate connection holes.

[0045] Similarly, each transverse guard plate 32 is provided with a transverse guard plate connection hole, and each vertical guard plate 31 is provided with a vertical guard plate second connection hole corresponding to the connection hole of the transverse guard plate 32. Metal bolts pass through the vertical guard plate second connection holes and are threadedly connected to the transverse guard plate connection holes.

[0046] The guard plate frame 3 is made of metal material, which can enhance the structural strength of the radiation plate 1 and protect the radiation plate 1 and the RF connector 2 from being worn by foreign objects during the use of the antenna, causing deterioration of the electrical performance. In terms of electrical performance, the vertical guard plate 31 is perpendicular to the radiation plate 1, that is, perpendicular to the plane where the broadband radiation angle curve groove 12 is located, that is, perpendicular to the direction of electric field vibration, which is conducive to reducing the diffusion of electromagnetic waves in the horizontal direction, improving the directivity of the antenna aperture radiation, and thus improving the gain.

[0047] The guard frame of the present invention is a machined aluminum part, and the RF connector 2, the radiation plate 1 and the guard frame 3 are fastened together by bolts. It is easy to use, disassemble and maintain, and has great advantages in both size and weight.

[0048] The working mode of the antenna of the present invention is as follows:

[0049] The external circuit is connected through the RF connector 2. The RF connector 2 feeds the antenna through the outer conductor 21 and the probe 23, and the broadband electromagnetic wave is fed through the broadband impedance matching hole 11 for tuning. The electromagnetic wave passes through the broadband radiation angle curve slot 12, and the electromagnetic waves of different frequencies are radiated outward smoothly one by one, thereby generating the antenna radiation effect.

[0050] Among them, the standard 50 ohm impedance RF connector 2 uses an external standard RF 50 ohm impedance interface, does not require an impedance conversion unit, and has a simple structure. The design of the angle curve also plays a role in the slow conversion of 50 ohms to spatial impedance, thereby greatly widening the antenna standing wave bandwidth and radiation bandwidth. By changing the radiation curve, a broadband high-gain radiating antenna with any center frequency from decimeter waves to millimeter waves and a relative bandwidth of more than 60% can be obtained.

[0051] Figure 4 The standing wave ratio design result of the symmetrical wideband antenna provided by the present invention is shown. As can be seen from the figure, the standing wave ratio of the symmetrical wideband antenna is less than 2 at 5GHz to 15GHz, and the relative bandwidth is 66.7%. Figure 5 The radiation gain design result of the symmetrical angle wideband antenna provided by the present invention is shown. It can be seen from the figure that the maximum radiation directional gain of the symmetrical angle wideband antenna is greater than 10dBi.

[0052] In summary, the present invention has the following advantages:

[0053] 1. Broadband: Through the design of broadband impedance matching hole 11 and broadband radiation angle curve slot 12, the standing wave working bandwidth reaches more than 60%, while traditional antennas are difficult to achieve a working bandwidth of more than 50%.

[0054] 2. High gain: Through the wideband radiation angle curve slot 12 made of metal material, the directional radiation gain reaches 10dBi, while the radiation gain of traditional antennas is generally below 4dBi. If the gain needs to be improved, a complex array antenna needs to be designed.

[0055] 3. The feeding structure is simple: the outer conductor 21 of the RF connector 2 is fixed by bolts, and the probe 23 is fixed by welding, without the need for other impedance transition structures or power distribution networks.

[0056] 4. Simple manufacturing process: The radiation plate 1 itself is integrally formed, and the radiation plate 1, the RF connector 2 and the guard plate frame 3 are spliced ​​with bolts, which can ensure the processing accuracy, simple and reliable installation, good consistency, and easy disassembly, maintenance and debugging.

[0057] 5. Small size: Under the same gain conditions, the volume is about 60% of the traditional antenna. The radiation curve can be adjusted according to the radiation gain requirements to achieve the effect of reducing or enlarging the volume. The copper-plated radiator has low radiator loss, especially high radiation efficiency in the millimeter wave frequency band.

[0058] The present invention makes design innovations to address the contradiction between miniaturization and wide bandwidth and high gain. By matching the feed structure, the radiation angle curve (such as the exponential equation curve, the logarithmic equation curve), and the enhanced radiation shield, the electrical performance effects of wide-band impedance matching, wide-band radiation, and high-gain directional radiation are achieved. At the same time, the symmetrical angle broadband antenna provided by the present invention also has the advantages of simplified feeding structure, antenna miniaturization, high strength, and simple assembly process. The symmetrical angle broadband antenna has good electrical performance, relatively low cost, and a simple and reliable process compared to traditional antennas. It has good market application prospects and can be widely used in wireless communication fields such as 4G, 5G, millimeter wave, and ultra-wideband.

[0059] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A symmetrical wideband antenna, characterized in that: It comprises a radio frequency connector and a radiation board, wherein the radio frequency connector is fixedly connected to the radiation board; The radiation plate is provided with a broadband impedance matching hole and a broadband radiation angle curve groove, wherein the broadband radiation angle curve groove comprises a contraction groove bottom, an opening groove, and a first angle curve groove wall and a second angle curve groove wall opposite to each other, wherein the contraction groove bottom passes through the hole wall of the broadband impedance matching hole, and the opening groove passes through a side surface of the radiation plate, and the area of ​​the opening groove is larger than the area of ​​the contraction groove bottom; The radio frequency connector comprises an outer conductor, a medium is fixedly sleeved inside the outer conductor, and a probe is fixedly sleeved inside the medium; A dielectric hole penetrating through one side of the radiation plate is provided on the wall of the first angular curve groove, the outer conductor is fixedly provided on the side of the radiation plate provided with the dielectric hole, and one end of the dielectric away from the outer conductor extends from the outer conductor into the dielectric hole; one end of the probe away from the outer conductor extends from the dielectric into the broadband radiation angular curve groove and is fixedly connected to the wall of the second angular curve groove, and the probe is located beside the broadband impedance matching hole; A probe groove is provided on the wall of the second angle curve groove; one end of the probe away from the outer conductor extends from the medium into the probe groove and is fixedly connected to the probe groove; The radiation plate comprises a radiation substrate, the open slot passes through a side surface of the radiation substrate; the radiation substrate protrudes from the middle of the side surface away from the open slot to form a radiation convex plate; The broadband impedance matching hole is opened on the radiation convex plate, and the broadband radiation angle curve groove extends from the radiation convex plate to the radiation substrate; The outer conductor is arranged on one side surface of the radiation convex plate, and the dielectric hole penetrates from the first angle curved groove wall to the side surface of the radiation convex plate; The radiation plate includes two opposite plate surfaces and a plurality of side surfaces perpendicular to any of the plate surfaces. The broadband impedance matching hole penetrates the two opposite plate surfaces of the radiation plate. The broadband radiation angle curve groove penetrates the two opposite plate surfaces of the radiation plate.

2. The symmetrical angular broadband antenna according to claim 1, characterized in that: The symmetrical angle broadband antenna also includes a guard plate frame, and the radiation plate is fixedly connected to the guard plate frame.

3. The symmetrical angle broadband antenna according to claim 2, characterized in that: The symmetrical angle broadband antenna also includes a guard plate frame, the radiation plate is fixedly connected to the guard plate frame includes two vertical guard plates, and the two vertical guard plates are fixedly connected to two opposite sides of the radiation base plate; The guard plate frame also includes two transverse guard plates, and the two sides of each transverse guard plate are respectively fixedly connected to the two vertical guard plates; the radiation substrate is located between the two transverse guard plates.

4. The symmetrical angle broadband antenna according to claim 1, characterized in that: A convex plate connecting hole is also provided on the side of the radiation convex plate with the dielectric hole; the outer conductor includes an outer conductor tube and an outer conductor seat arranged around the outer conductor tube, and the dielectric sleeve is arranged in the outer conductor tube; an outer conductor connecting hole corresponding to the convex plate connecting hole is provided on the outer conductor seat, and a bolt is provided in the outer conductor connecting hole, and the bolt is threadedly connected to the convex plate connecting hole.

5. The symmetrical angular broadband antenna according to claim 1, characterized in that: The radiation substrate and the radiation convex plate are an integrally formed structure.

6. The symmetrical angle broadband antenna according to claim 1, characterized in that: The radiation plate is a copper-gold-plated radiation plate.

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