Low profile ultra-wideband antenna and working method thereof

Abstract

The present invention discloses a low-profile ultra-wideband antenna and a working method thereof, wherein the low-profile ultra-wideband antenna comprises: a radiator, which performs effective radiation of the antenna in a first frequency band; an antenna feeder, which partially overlaps with the projection of the radiator in a direction perpendicular to the ground plane, and the overlapping parts of the projections are coupled to form a coupled feeding structure; the antenna feeder is used to transmit energy to the radiator and act as a radiator in a second frequency band to provide impedance matching; the coupled feeding structure is used to perform coupled feeding, realize impedance matching in the first frequency band and expand the impedance bandwidth of the first frequency band; the branch antenna is used to provide radiation in the third frequency band and assist the parasitic antenna in the radiation in the fourth frequency band; the parasitic antenna provides radiation in the fifth frequency band. The present invention is used to achieve ultra-wideband coverage in a limited space, and can provide good radiation performance and impedance matching effects in each frequency band.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a low-profile ultra-wideband antenna and a working method thereof. Background Art

[0002] Ultra-wideband antennas can cover multiple frequency bands and can therefore be used in a variety of environments, such as LTE band, Wi-Fi band, GSM, CDMA band, 4G low-frequency band, MHB band, 5G low-frequency band, etc., to meet the needs of different customers.

[0003] Existing ultra-wideband antenna technology usually adopts traditional feeding method and single radiator design, and its main problems include:

[0004] 1. Size limitation: It is very difficult to implement ultra-wideband antennas in miniaturized devices, especially in low frequency bands.

[0005] 2. Bandwidth issue: Existing technologies make it difficult to simultaneously achieve expansion of low-frequency bandwidth and coverage of the entire ultra-wide frequency band.

[0006] 3. Performance degradation: In low frequency bands, traditional feeding methods can lead to a narrow antenna impedance bandwidth, thereby affecting the antenna's radiation efficiency and impedance matching.

[0007] 4. Frequency band compatibility: Due to space limitations, it is difficult to achieve good compatibility and radiation performance of multiple frequency bands in the same device.

[0008] In summary, although the existing ultra-wideband antenna can cover multiple frequency bands, it still has deficiencies in miniaturization, low-profile design, and ultra-wideband coverage, especially in terms of performance optimization in low frequency bands. This puts forward a clear demand for new technical solutions, that is, to achieve high-performance ultra-wideband antennas in a limited space. Summary of the invention

[0009] An embodiment of the present invention provides a low-profile ultra-wideband antenna, which is used to achieve ultra-wideband coverage in a limited space and provide good radiation performance and impedance matching effect in each frequency band. The low-profile ultra-wideband antenna includes:

[0010] A radiator 1 is electrically connected to a ground plane 6 and is used for effective radiation of the antenna in a first frequency band;

[0011] The antenna feed 2 partially overlaps with the radiator 1 in a direction perpendicular to the ground plane 6, and the overlapping parts of the projections are coupled to each other to form a coupling feeding structure 4; the antenna feed 2 is used to transmit energy to the radiator 1 and act as a radiator to provide impedance matching in the second frequency band; the coupling feeding structure 4 is used to perform coupling feeding to achieve impedance matching in the first frequency band and expand the impedance bandwidth of the first frequency band;

[0012] The branch antenna 3 is arranged on the antenna feeder 2, and is used to provide radiation in the third frequency band and assist the parasitic antenna 5 in the radiation in the fourth frequency band;

[0013] The parasitic antenna 5 is arranged on the ground plane and is used to provide radiation in the fifth frequency band; wherein there is a discontinuous frequency band between the first frequency band and the second frequency band; the second frequency band, the third frequency band, the fourth frequency band and the fifth frequency band jointly cover continuous frequency bands from low frequency to high frequency, and are arranged in ascending order of frequency.

[0014] The embodiment of the present invention further provides a working method of a low-profile ultra-wideband antenna, which is used to achieve ultra-wideband coverage in a limited space and provide good radiation performance and impedance matching effect in each frequency band. The method includes:

[0015] The radiator performs effective radiation of the antenna in the first frequency band;

[0016] The antenna feeder transmits energy to the radiator and acts as a radiator to provide impedance matching in the second frequency band; the antenna feeder and the radiator partially overlap in projection along a direction perpendicular to the ground plane, and the overlapping projection parts are coupled to each other to form a coupled feeding structure;

[0017] The coupled feeding structure performs coupled feeding to achieve impedance matching in the first frequency band and expand the impedance bandwidth of the first frequency band;

[0018] The branch antenna provides radiation in the third frequency band and assists the parasitic antenna in the radiation in the fourth frequency band;

[0019] The parasitic antenna provides radiation in the fifth frequency band; wherein there is a discontinuous frequency band between the first frequency band and the second frequency band; the second frequency band, the third frequency band, the fourth frequency band and the fifth frequency band jointly cover continuous frequency bands from low frequency to high frequency, and are arranged in ascending order of frequency.

[0020] The low-profile ultra-wideband antenna provided in an embodiment of the present invention includes: a radiator 1, which is electrically connected to a ground plane 6 and is used for effective radiation of the antenna in a first frequency band; an antenna feeder 2, which partially overlaps with the radiator 1 in a direction perpendicular to the ground plane 6, and the overlapping parts of the projections are coupled to each other to form a coupling feeding structure 4; the antenna feeder 2 is used to transmit energy to the radiator 1 and act as a radiator to provide impedance matching in the second frequency band; the coupling feeding structure 4 is used to perform coupling feeding to achieve impedance matching in the first frequency band and expand the impedance bandwidth of the first frequency band; a branch antenna 3 is arranged on the antenna feeder 2, and is used to provide radiation in a third frequency band and assist the parasitic antenna 5 in radiation in a fourth frequency band; the parasitic antenna 5 is arranged on the ground plane and is used to provide radiation in a fifth frequency band; wherein there is a discontinuous frequency band between the first frequency band and the second frequency band; the second frequency band, the third frequency band, the fourth frequency band and the fifth frequency band jointly cover continuous frequency bands from low frequency to high frequency, and are arranged in ascending order of frequency. In the embodiment of the present invention, the electrical length of the antenna is increased by the radiator and its special coupling feeding method, so as to solve the problem of size limitation, thereby achieving better low-frequency performance in a limited space; the coupling feeding structure is formed by the antenna feeder and the radiator to achieve biased coupling feeding to solve the bandwidth problem, especially to provide better bandwidth in the low frequency band, improve the VSWR of the low frequency band, and also improve the coupling and matching between different frequency bands; by adding branch antennas to the antenna feeder to cover additional frequency bands, the problem of frequency band compatibility is solved, thereby expanding the working range of the antenna without affecting the performance of the main frequency band; by setting a parasitic antenna, the high frequency band coverage of the antenna is further expanded; the low-profile ultra-wideband antenna provided by the present invention can achieve ultra-wide frequency band coverage in a limited space, and can provide good radiation performance and impedance matching effect in each frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. 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. In the drawings:

[0022] Figure 1 An example diagram of a conventional feeding antenna in the prior art provided in an embodiment of the present invention;

[0023] Figure 2 An example diagram of a low-frequency standing wave of a conventional feeding antenna in the prior art provided by an embodiment of the present invention;

[0024] Figure 3An exemplary diagram of a coupling feeding method of a low-profile ultra-wideband antenna provided by an embodiment of the present invention;

[0025] Figure 4 An example diagram comparing the standing wave ratio of a conventional feed provided in an embodiment of the present invention and the standing wave ratio of the feed provided in the present invention;

[0026] Figure 5 An exemplary diagram of a branch structure of a low-profile ultra-wideband antenna provided by an embodiment of the present invention;

[0027] Figure 6 An example diagram of standing waves of an antenna with a branch structure provided in an embodiment of the present invention;

[0028] Figure 7 An exemplary diagram of a side view of a low-profile ultra-wideband antenna provided by an embodiment of the present invention;

[0029] Figure 8 An example diagram of the comparison between the standing wave ratio of an antenna provided in an embodiment of the present invention and the standing wave ratio of an antenna without parasitic antenna;

[0030] Fig. 9 An example flowchart of a working method of a low-profile ultra-wideband antenna provided by an embodiment of the present invention;

[0031] Fig.10 An exemplary diagram of a coupling feeding mode of a low-profile ultra-wideband antenna at different angles provided by an embodiment of the present invention;

[0032] Fig.11 An exemplary diagram of a coupling feeding mode of a low-profile ultra-wideband antenna at different angles provided by an embodiment of the present invention;

[0033] Fig. 12A is an efficiency diagram of a low-profile ultra-wideband antenna in a first frequency band provided by an embodiment of the present invention;

[0034] Fig. 12B is an efficiency diagram of a low-profile ultra-wideband antenna in a second frequency band provided by an embodiment of the present invention;

[0035] Fig. 12C is an efficiency diagram of a low-profile ultra-wideband antenna in a third frequency band provided by an embodiment of the present invention;

[0036] Fig.13 An example diagram of VSWR obtained by performing a physical test on a low-profile ultra-wideband antenna provided in an embodiment of the present invention;

[0037] Fig.14 This is a structural example diagram of a low-profile ultra-wideband antenna provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0039] The term "and / or" herein only describes an association relationship, indicating that three relationships may exist. For example, A and / or B may represent the following three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C may represent including any one or more elements selected from the set consisting of A, B, and C.

[0040] In the description of this specification, the terms "include", "including", "have", "contain", etc. are all open terms, which mean including but not limited to. The descriptions with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", etc. mean that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The order of steps involved in each embodiment is used to schematically illustrate the implementation of the present application, and the order of steps therein is not limited and can be appropriately adjusted as needed.

[0041] The embodiments of the present invention involve the following terms, which are explained as follows:

[0042] LTE: Long Term Evolution;

[0043] Wi-Fi: wireless LAN communication technology;

[0044] 2.4GHz frequency band: 2.412GHz-2.484GHz;

[0045] 5GHz frequency band: 5.15GHz-5.85GHz5;

[0046] VSWR: Voltage Standing Wave Ratio;

[0047] Return loss: The ratio of the power of the incident wave to the reflected wave, which can be converted into voltage standing wave ratio.

[0048] Ultra-wideband antennas can cover multiple frequency bands and can therefore be used in a variety of environments, such as LTE bands, Wi-Fi bands, GSM, CDMA bands, 4G low-frequency bands, MHB bands, 5G low-frequency bands, etc., to meet the needs of different customers. Existing ultra-wideband antenna technology usually uses traditional feeding methods and single radiator designs, and its main problems include:

[0049] 1. Size limitation: It is very difficult to implement ultra-wideband antennas in miniaturized devices, especially in low frequency bands.

[0050] 2. Bandwidth issue: Existing technologies make it difficult to simultaneously achieve expansion of low-frequency bandwidth and coverage of the entire ultra-wide frequency band.

[0051] 3. Coupling and matching: In a limited space, it is a challenge to achieve good coupling and matching between different frequency bands.

[0052] 4. Performance degradation: In low frequency bands, traditional feeding methods can lead to a narrow antenna impedance bandwidth, thereby affecting the antenna's radiation efficiency and impedance matching.

[0053] 5. Frequency band compatibility: Due to space limitations, it is difficult to achieve good compatibility and radiation performance of multiple frequency bands in the same device.

[0054] In summary, although the existing ultra-wideband antenna can cover multiple frequency bands, it still has deficiencies in miniaturization, low-profile design, and ultra-wideband coverage, especially in terms of performance optimization in low frequency bands. This puts forward a clear demand for new technical solutions, that is, to achieve high-performance ultra-wideband antennas in a limited space.

[0055] In order to solve the above problems, the embodiment of the present invention provides a low-profile ultra-wideband antenna to achieve ultra-wideband coverage in a limited space, and provide good radiation performance and impedance matching effect in each frequency band. Fig.14 , Fig.14 A structural example diagram of a low-profile ultra-wideband antenna provided in an embodiment of the present invention, the low-profile ultra-wideband antenna may include:

[0056] A radiator 1 is electrically connected to a ground plane 6 and is used for effective radiation of the antenna in a first frequency band;

[0057] The antenna feed 2 partially overlaps with the radiator 1 in a direction perpendicular to the ground plane 6, and the overlapping parts of the projections are coupled to each other to form a coupling feeding structure 4; the antenna feed 2 is used to transmit energy to the radiator 1 and act as a radiator to provide impedance matching in the second frequency band; the coupling feeding structure 4 is used to perform coupling feeding to achieve impedance matching in the first frequency band and expand the impedance bandwidth of the first frequency band;

[0058] The branch antenna 3 is arranged on the antenna feeder 2, and is used to provide radiation in the third frequency band and assist the parasitic antenna 5 in the radiation in the fourth frequency band;

[0059] The parasitic antenna 5 is arranged on the ground plane and is used to provide radiation in the fifth frequency band; wherein there is a discontinuous frequency band between the first frequency band and the second frequency band; the second frequency band, the third frequency band, the fourth frequency band and the fifth frequency band jointly cover continuous frequency bands from low frequency to high frequency, and are arranged in ascending order of frequency.

[0060] The low-profile ultra-wideband antenna provided in an embodiment of the present invention includes: a radiator 1, which is electrically connected to a ground plane 6 and is used for effective radiation of the antenna in a first frequency band; an antenna feeder 2, which partially overlaps with the radiator 1 in a direction perpendicular to the ground plane 6, and the overlapping parts of the projections are coupled to each other to form a coupling feeding structure 4; the antenna feeder 2 is used to transmit energy to the radiator 1 and act as a radiator to provide impedance matching in the second frequency band; the coupling feeding structure 4 is used to perform coupling feeding to achieve impedance matching in the first frequency band and expand the impedance bandwidth of the first frequency band; a branch antenna 3 is arranged on the antenna feeder 2, and is used to provide radiation in a third frequency band and assist the parasitic antenna 5 in radiation in a fourth frequency band; the parasitic antenna 5 is arranged on the ground plane and is used to provide radiation in a fifth frequency band; wherein there is a discontinuous frequency band between the first frequency band and the second frequency band; the second frequency band, the third frequency band, the fourth frequency band and the fifth frequency band jointly cover continuous frequency bands from low frequency to high frequency, and are arranged in ascending order of frequency. In the embodiment of the present invention, the electrical length of the antenna is increased by the radiator and its special coupling feeding method, so as to solve the problem of size limitation, thereby achieving better low-frequency performance in a limited space; the coupling feeding structure is formed by the antenna feeder and the radiator to achieve biased coupling feeding to solve the bandwidth problem, especially to provide better bandwidth in the low frequency band, improve the VSWR of the low frequency band, and also improve the coupling and matching between different frequency bands; by adding branch antennas to the antenna feeder to cover additional frequency bands, the problem of frequency band compatibility is solved, thereby expanding the working range of the antenna without affecting the performance of the main frequency band; by setting a parasitic antenna, the high frequency band coverage of the antenna is further expanded; the low-profile ultra-wideband antenna provided by the present invention can achieve ultra-wide frequency band coverage in a limited space, and can provide good radiation performance and impedance matching effect in each frequency band.

[0061] During specific implementation, the radiator 1 is electrically connected to the ground plane 6 to enable the antenna to effectively radiate in the first frequency band.

[0062] In the embodiment, the radiator 1 is electrically connected to the ground plane 6, and this connection method is intended to ensure that the antenna can effectively radiate in the first frequency band. In the working process of the antenna, the radiator 1 plays a key role. It can convert electrical energy into electromagnetic waves and radiate them into space in a specific way, thereby realizing signal transmission and reception. Through the electrical connection with the ground plane 6, the radiator 1 can obtain stable electrical performance, thereby ensuring effective radiation performance in the first frequency band to meet the communication requirements of the antenna in this frequency band.

[0063] In one embodiment, the radiator 1 is in an L-shape, a square, a rectangle or a U-shape.

[0064] In one embodiment, the shape of the radiator 1 is set to be L-shaped, square, rectangular or U-shaped. The selection of these shapes is based on comprehensive consideration of antenna performance. L-shaped, square, rectangular and U-shaped radiators have their own advantages in electromagnetic radiation characteristics, impedance matching and space utilization.

[0065] By adopting these shapes, the radiation requirements of the antenna in different frequency bands can be better met, and the efficiency and performance stability of the antenna can be improved. Specifically, the L-shaped radiator can have a specific radiation pattern in certain frequency bands, which helps to achieve good directivity and gain; the square and rectangular radiators are relatively simple in structure and easy to manufacture and integrate; the U-shaped radiator may play a unique role in increasing the electrical length or improving impedance matching. In short, these shapes are selected to optimize the performance of the antenna to meet the needs of various application scenarios.

[0066] During specific implementation, the antenna feed 2 partially overlaps with the radiator 1 in a projection along a direction perpendicular to the ground plane 6, and the overlapping projection parts are coupled to each other to form a coupling feeding structure 4; the antenna feed 2 is used to transmit energy to the radiator 1 and act as a radiator in the second frequency band to provide impedance matching; the coupling feeding structure 4 is used to perform coupling feeding to achieve impedance matching in the first frequency band and expand the impedance bandwidth of the first frequency band.

[0067] In the embodiment, the antenna feed 2 has a partial projection overlap with the radiator 1 in a direction perpendicular to the ground plane 6. This design layout enables the antenna feed 2 to effectively transmit energy to the radiator 1 to meet the energy requirements of the antenna system. At the same time, the antenna feed 2 has the function of providing impedance matching in the second frequency band, thereby ensuring that the antenna can achieve efficient signal transmission and reception in this frequency band, reducing signal reflection and energy loss. In addition, the coupling feed structure 4 is used for coupling feeding. Through this coupling feeding method, impedance matching in the first frequency band is achieved, so that the antenna can work stably in the first frequency band, and the performance of the antenna in this frequency band is improved.

[0068] In one embodiment, the coupling feeding structure is further used to assist in radiating a second frequency band through coupling feeding.

[0069] In one embodiment, in addition to achieving impedance matching in the first frequency band and expanding the impedance bandwidth of the first frequency band, the coupled feed structure also has the function of auxiliary radiation in the second frequency band through coupled feeding. This design aims to further optimize the radiation performance of the antenna in the second frequency band and improve the working efficiency and signal transmission quality of the antenna. Through coupled feeding, the coupled feed structure can effectively transfer energy to the radiator, so that it generates auxiliary radiation in the second frequency band, thereby enhancing the signal coverage and stability of the antenna in this frequency band. The realization of this function helps to improve the overall performance of the antenna, so that it can better meet various communication needs.

[0070] Figure 3 An example diagram of a coupling feeding method of a low-profile ultra-wideband antenna provided by an embodiment of the present invention, such as Figure 3 As shown, in one embodiment, the antenna feeder 2 includes a first feeding part 2-1 and a second feeding part 2-2; one end of the first feeding part 2-1 is connected to the inner conductor of the cable to form a feeding point; the first feeding part 2-1 is used to exchange energy with the parasitic antenna 5 through coupling, provide a connection carrier for the branch antenna 3, and provide energy to the branch antenna 3 through the feeding point.

[0071] In a specific embodiment, the antenna feeder 2 is composed of a first feeding part 2-1 and a second feeding part 2-2. The first feeding part 2-1 is in the form of a bent part, one end of which is connected to the inner conductor of the cable, and this connection position forms a feeding point. The first feeding part 2-1 has multiple functions in the antenna system.

[0072] In terms of energy transmission, the first feed part 2-1 is the only feed point of the entire antenna system and is electrically connected to the cable part. Under this architecture, the branch antenna 3 obtains energy from the feed point through an electrical connection with the first feed part, thereby providing power support for its own operation. The parasitic antenna 5 realizes energy exchange through the coupling relationship with the first feed part 2-1, and then realizes energy input or output, thus constructing an orderly energy transmission path within the antenna system.

[0073] In terms of frequency band reception and radiation functions, the first feed part 2-1 and the second feed part 2-2 work together to jointly undertake the reception or radiation tasks of the 1700MHz-2700MHz frequency band. The bending design of the first feed part 2-1 is not accidental. Its main purpose is to save the volume of the ultra-wideband antenna and achieve effective frequency band reception and radiation functions in a limited space, which is of great significance for meeting the requirements of antenna miniaturization design.

[0074] As a carrier of the branch antenna 3, the first feeding part 2-1 provides a physical support and electrical connection basis for the branch antenna 3, ensuring that the branch antenna 3 can be stably integrated into the antenna system and function normally.

[0075] In relation to the parasitic antenna 5, there is a coupling relationship between the first feeding part 2-1 and the parasitic antenna 5, and the two exchange energy with each other through this coupling. This energy exchange mechanism helps to optimize the overall performance of the antenna system, enables the antenna to use energy more effectively in different working states, and improves the working efficiency of the antenna in various frequency bands.

[0076] The second feeding part 2-2 exists in the form of a planar part, and cooperates with the first feeding part 2-1 to form a complete antenna feed body 2, which plays an indispensable role in the antenna's energy transmission, frequency band reception and radiation, etc., ensuring that the antenna can operate stably under various working conditions, and that the antenna has good radiation function in different frequency bands, and exhibits outstanding bandwidth performance under the requirements of low-profile miniaturized design, while taking into account the performance of the antenna working independently and on a large floor.

[0077] In one embodiment, the second feeding portion 2 - 2 is located directly below the radiator 1 , and the antenna voltage standing wave ratio is optimized by adjusting the coupling degree by displacement in a direction perpendicular to the ground plane 6 and optimizing the area of ​​the coupling feeding structure 4 .

[0078] In a specific embodiment, the second feed part 2-2 has a specific position layout and functional characteristics. The second feed part 2-2 is partially located directly below the radiator 1. In terms of adjusting the coupling degree, the relative position relationship between the second feed part 2-2 and other related components can be changed by displacement in a direction perpendicular to the ground plane 6, thereby affecting the coupling degree. At the same time, optimizing the area of ​​the coupling feed structure 4 is also a key means to adjust the coupling degree. By reasonably adjusting the size of the area, the electromagnetic field distribution inside the coupling feed structure 4 can be accurately controlled, thereby changing the energy coupling between the various parts of the antenna, and ultimately optimizing the antenna voltage standing wave ratio.

[0079] In one embodiment, the second feeding part 2 - 2 in the antenna feeder 2 is in the shape of a rectangle, a trapezoid that is wide at the top and narrow at the bottom, or a semicircle.

[0080] In one embodiment, the second feed part 2-2 of the antenna feed body 2 presents a variety of shape characteristics. Its shape can be designed to be rectangular, and the second feed part 2-2 of this shape has a certain structural stability in the antenna system. During the energy transmission process, the rectangular structure is conducive to forming a more regular current path, thereby stably providing energy support to each part of the antenna, which helps to maintain the consistency of the overall performance of the antenna. At the same time, its regular shape is also convenient for layout and connection with other components in the antenna system, making the antenna structure more compact and reasonable, and achieving efficient energy transmission and signal radiation in a limited space.

[0081] The shape of the second feeding part 2-2 can also be a trapezoid that is wide at the top and narrow at the bottom. The trapezoidal shape design brings unique electromagnetic characteristics to the antenna system. When interacting with other antenna components, the hypotenuse of the trapezoid and the upper and lower sides of different widths can change the distribution of the electromagnetic field, thereby affecting the coupling effect of the antenna. By adjusting the shape parameters of the trapezoid, such as the length ratio of the upper and lower bases, the inclination angle of the hypotenuse, etc., the performance of the antenna in different frequency bands can be optimized. For example, within a specific frequency band, the energy coupling with components such as radiators and parasitic antennas can be enhanced through the design of the trapezoidal shape, the radiation efficiency of the antenna can be improved, and the bandwidth performance of the antenna in this frequency band can be improved, so that it can better adapt to complex usage environments and diverse frequency band requirements.

[0082] In addition, semicircle is also one of the feasible shapes of the second feed part 2-2. The geometric characteristics of the semicircle give it special electromagnetic behavior in the antenna system. During energy transmission and coupling, the semicircular curved structure can guide the distribution of the electromagnetic field and form a unique interaction mode with other components. This shape helps to achieve better impedance matching in certain frequency bands, reduce signal reflections, and thus improve the overall performance of the antenna. For example, when the antenna operates in a specific frequency band, the semicircular second feed part 2-2 can better cooperate with the surrounding electromagnetic field, optimize the voltage standing wave ratio of the antenna, and enhance the radiation effect of the antenna in this frequency band, thereby improving the performance stability of the antenna in the entire ultra-wide frequency band (such as 618MHz-5000MHz), so that it can meet the performance requirements of ultra-wideband antennas in different working scenarios (whether it is a small floor environment or a large floor environment), and achieve broadband in the low frequency band and effective operation of the entire antenna ultra-wide band.

[0083] In summary, the different shape designs of the second feeding part 2-2 provide a variety of options for the antenna in terms of performance optimization, space utilization, and frequency band adaptation, so that it can better adapt to complex and changeable usage requirements and improve the overall performance and applicability of the antenna.

[0084] In one embodiment, only one feeding point is provided in the antenna design of the present invention. By adopting only one feeding point, the amount of cables used is effectively saved. In the antenna system, the reduction of cables not only simplifies the structural layout and reduces the cost, but also reduces the weight of the antenna to a certain extent, which is conducive to the installation and use of the antenna in different application scenarios.

[0085] This feed point becomes the key hub for energy transmission in the antenna system. In terms of energy input, external energy is transmitted to the antenna system through this feed point. In the process of energy output, the energy received and converted by the antenna is also transmitted outward through this feed point to achieve interaction with external devices.

[0086] Specifically, the transmission of coupled energy is closely related to the feeding point. The antenna feed 2 and the radiator 1 realize coupled energy transmission through the coupled feeding structure, and the input and output of this coupled energy depend on the only feeding point. For example, during operation in the first frequency band, the coupled feeding structure 4 obtains energy through the feeding point to achieve energy coupling with the radiator 1, thereby expanding the impedance bandwidth of the frequency band and ensuring the good radiation performance of the antenna in the frequency band.

[0087] The energy of the branch antenna 3 is also input and output through this feeding point. The branch antenna 3 provides radiation in the third frequency band and assists the parasitic antenna in the radiation in the fourth frequency band. The energy required for its operation is provided by the feeding point. At the same time, the energy generated by the branch antenna 3 during the radiation process can also be fed back or transmitted to other related components through the feeding point. The parasitic antenna 5 obtains energy from the feeding point through the coupling relationship with the antenna feeder, thereby achieving effective radiation in the fifth frequency band. At the same time, the energy generated during its radiation process can also be transmitted through the feeding point.

[0088] In summary, this single feeding point realizes the centralized input and output of multiple energies in the antenna system, optimizes the energy transmission mechanism of the antenna, improves the overall performance and efficiency of the antenna system, ensures that the antenna can operate stably and efficiently in all frequency bands, and achieves ultra-wide frequency band coverage.

[0089] In a specific implementation, the branch antenna 3 is arranged on the antenna feeder 2 to provide radiation in the third frequency band and assist the parasitic antenna 5 in radiating in the fourth frequency band.

[0090] In the embodiment, the carrier of the branch antenna 3 is the first feeding part 2-1. In the working mechanism of the antenna, the branch antenna 3 plays an important role. It is used to provide radiation in the third frequency band to realize signal transmission and reception in this frequency band. At the same time, the branch antenna 3 can also assist in the radiation in the fourth frequency band, enhance the radiation performance of the antenna in the fourth frequency band, thereby expanding the working frequency band range of the antenna and improving the overall communication capability of the antenna. Through this design, the branch antenna 3 and the antenna feeder 2 cooperate with each other to jointly realize the effective radiation of the antenna in multiple frequency bands and meet the requirements of antenna performance in different communication scenarios.

[0091] In one embodiment, the branch antenna 3 is also used to mainly radiate the third frequency band and auxiliary radiate the fourth frequency band.

[0092] In one embodiment, the branch antenna 3 further performs its function to assist in radiating the fourth frequency band. Through this auxiliary radiation effect, the signal transmission capability of the antenna in the fourth frequency band can be enhanced, and the performance of the antenna in this frequency band can be improved, thereby better meeting the requirements of the communication system for this frequency band.

[0093] In one embodiment, the length direction of the branch antenna 3 is parallel to the ground plane 6 or presents a preset angle.

[0094] In a specific embodiment, there is a specific positional relationship between the branch antenna 3 and the ground plane 6. The length direction of the branch antenna 3 and the ground plane 6 have two possible states. First, the length direction of the branch antenna 3 is parallel to the ground plane 6. In this state, the branch antenna 3 exists in a relatively stable posture in the antenna system. Its parallel relationship with the ground plane 6 makes the distribution of the electromagnetic field around the branch antenna 3 show a certain regularity during the operation of the antenna. This regularity helps the branch antenna 3 to more effectively transmit energy and interact signals with other components such as the antenna feeder 2. For example, in terms of energy transmission, the parallel positional relationship is conducive to the stable flow of current in the branch antenna 3, thereby ensuring that the branch antenna 3 can stably receive the energy supply from the antenna feeder 2 and convert it into an effective radiation signal. At the same time, in terms of signal radiation, the branch antenna 3 parallel to the ground plane 6 can form a relatively uniform radiation field in a specific frequency band, thereby improving the radiation performance of the antenna in this frequency band.

[0095] Secondly, the length direction of the branch antenna 3 is at a preset angle with the ground plane 6. The existence of the preset angle changes the electromagnetic characteristics of the branch antenna 3 in the antenna system. By adjusting the angle between the branch antenna 3 and the ground plane 6, the performance of the antenna in different frequency bands can be optimized. When the branch antenna 3 is at a preset angle with the ground plane 6, the distribution of the electromagnetic field around the branch antenna 3 becomes more complex and diverse. This complex electromagnetic field distribution can produce a new coupling effect with other components in the antenna system (such as the antenna feed 2, the parasitic antenna 5, etc.). For example, in certain frequency bands, by adjusting the preset angle, the coupling degree between the branch antenna 3 and the parasitic antenna 5 can be enhanced, thereby improving the resonance effect of the antenna in the frequency band and improving the bandwidth performance of the antenna. At the same time, the setting of the preset angle also provides more flexibility for the antenna in spatial layout, so that the antenna can be better integrated with other antennas or devices in a limited space, meet complex design requirements, achieve good performance of the antenna in different frequency bands, while taking into account the compatibility of the entire frequency band, and improve the applicability and stability of the antenna in various working scenarios.

[0096] In another embodiment, the length direction of the branch antenna 3 is parallel to or at a preset angle to the ground plane 6. This specific positional relationship helps to optimize the radiation characteristics of the branch antenna 3, so that it can work more effectively with other components and improve the overall efficiency and performance stability of the antenna. Whether it is a parallel or angled arrangement, it is intended to achieve the best radiation effect of the antenna in different frequency bands.

[0097] In one embodiment, the length and height of the branch antenna 3 can be calculated according to the following formula:

[0098]

[0099] Where, l is the length of the branch antenna, in mm; h is the height from the center of the branch antenna in the vertical direction to the ground plane, in mm; is the relative dielectric constant, unitless; f is the center frequency, unit is GHz.

[0100] The size of the branch antenna 3 is relatively complex to determine. It is necessary not only to refer to the length of the antenna, but also to consider the height of the branch antenna itself. There is a mutual influence between the antenna length and height. In the actual design process, simulation can be used to optimize it according to the specific situation of the antenna. The antenna length and height can be calculated with the help of specific formulas. By rationally using these formulas and simulation optimization, the branch antenna 3 can play a better role in the antenna system and work together with other components in the antenna system (such as feeder, parasitic antenna, etc.) to jointly ensure the good performance of the antenna in the overall frequency band.

[0101] In a specific implementation, the parasitic antenna 5 is arranged on the ground plane to provide radiation in the fifth frequency band; wherein there is a discontinuous frequency band between the first frequency band and the second frequency band; the second frequency band, the third frequency band, the fourth frequency band and the fifth frequency band jointly cover continuous frequency bands from low frequency to high frequency, and are arranged in ascending order of frequency.

[0102] In the embodiment, the parasitic antenna 5 is arranged above the ground plane, and its main function is to provide radiation in the fifth frequency band. In the design of the antenna, the first frequency band, the second frequency band, the third frequency band, the fourth frequency band and the fifth frequency band cooperate with each other to cover a continuous frequency band from low frequency to high frequency, and these frequency bands are arranged in order of increasing frequency. This layout and coverage of frequency bands enables the antenna to achieve effective signal transmission and reception in a wider frequency range, meeting the requirements of frequency bands in different application scenarios. By carefully designing and adjusting the parameters of each frequency band, it is ensured that the antenna can maintain good performance throughout the entire frequency band range, thereby improving the versatility and adaptability of the antenna.

[0103] In a specific embodiment, the first frequency band, the second frequency band, the third frequency band, the fourth frequency band and the fifth frequency band are illustrated as follows:

[0104] The first frequency band is 618MHz-1150MHz (for example, to achieve effective radiation of the antenna in the low frequency band, such as meeting the radiation requirements of the frequency band by connecting the radiator to the ground plane and coupling feeding).

[0105] The second frequency band is 1700 MHz-2700 MHz (for example, the antenna feed provides impedance matching in this frequency band, and the coupled feed structure assists in radiating this frequency band through coupled feeding).

[0106] The third frequency band is 2700 MHz-3800 MHz (for example, the branch antenna is arranged on the antenna feeder and mainly provides radiation in this frequency band).

[0107] The fourth frequency band is 3800MHz-4400MHz (for example, the branch antenna assists in radiating this frequency band, and the parasitic antenna can also assist in radiating this frequency band).

[0108] The fifth frequency band is 4400 MHz-5000 MHz (for example, the parasitic antenna is arranged on the ground plane to provide radiation in this frequency band).

[0109] In one embodiment, the parasitic antenna 5 is also used to mainly radiate the fifth frequency band and auxiliary radiate the fourth frequency band.

[0110] In one embodiment, the parasitic antenna 5 further plays its role and is also used to assist in the radiation of the fourth frequency band. Through this auxiliary radiation function, the radiation effect of the antenna in the fourth frequency band can be enhanced, and the signal transmission capability of the antenna in this frequency band can be improved, so that the antenna can better meet the needs of the communication system in this frequency band.

[0111] In one embodiment, the height of the parasitic antenna 5 is calculated according to the wavelength of the center frequency of the fifth frequency band.

[0112] Specifically, the height of the parasitic antenna 5 can be calculated according to the following formula:

[0113]

[0114] Wherein, l is the height of the parasitic antenna 5, in mm; f is the center frequency of the corresponding frequency band, in GHz.

[0115] In the above embodiment, the height of the parasitic antenna 5 is calculated based on the wavelength of the center frequency of the fifth frequency band. This calculation method is based on electromagnetic principles, and the wavelength of the center frequency of the frequency band is closely related to the good performance of the parasitic antenna 5 in this frequency band. By calculating the height based on the wavelength, the parasitic antenna 5 can better interact with the electromagnetic waves in the fifth frequency band, thereby optimizing its resonant characteristics in this frequency band, and then improving the radiation performance of the antenna as a whole in this frequency band and the entire working frequency band.

[0116] In another embodiment, the height dimension of the parasitic antenna 5 needs to be determined by fully considering the influence of the earth's image. The earth, as a conductor, will reflect the electromagnetic waves radiated by the antenna, thereby forming an earth's image effect. This effect will significantly change the electromagnetic field distribution around the antenna, and thus have an important impact on the performance of the parasitic antenna 5. Therefore, when determining the height dimension of the parasitic antenna 5, the influence of the earth's image must be taken into consideration.

[0117] In actual operation, the process of determining the antenna size includes two important steps: calculation and optimization. First, a theoretical calculation is performed, where the length l of the antenna is defined as the antenna height in millimeters (mm), which is one of the key parameters describing the physical size of the antenna. f represents the center frequency of the corresponding frequency band in gigahertz (GHz). Different center frequencies correspond to different electromagnetic characteristics and working requirements.

[0118] However, simulation software can simulate the performance of antennas in various actual working environments, and simulate the propagation, reflection, coupling and other processes of electromagnetic waves in antenna systems by establishing accurate electromagnetic models. During the simulation process, various performance indicators of parasitic antennas 5 of different heights and sizes can be analyzed in detail under the influence of the earth's mirror image, such as radiation pattern, gain, bandwidth, impedance matching, etc. By analyzing and comparing a large amount of simulation data, it is possible to determine the height size that makes the performance of the parasitic antenna 5 reach the optimal level, thereby ensuring that the antenna can work stably and efficiently in complex actual application scenarios, meet the performance requirements of the ultra-wideband antenna for the antenna in different working environments (such as small floor environments and large floor environments), and achieve broadband in the low frequency band and effective operation of the entire antenna ultra-wideband band.

[0119] In a specific implementation, the low-profile ultra-wideband antenna further includes: a grounding portion 7 connecting the radiator 1 and the ground plane 6 , so that the radiator 1 can be electrically connected to the ground plane 6 .

[0120] In an embodiment, the low-profile ultra-wideband antenna further includes: a grounding portion 7, which bears the important responsibility of connecting the radiator 1 with the ground plane 6. Through this connection method, the radiator 1 can be effectively electrically connected to the ground plane 6. The existence of the grounding portion 7 ensures that the current can flow back to the ground plane 6 smoothly, thereby effectively reducing the size of the antenna and optimizing the electrical performance of the antenna. This design helps to improve the radiation efficiency and signal transmission stability of the antenna, so that it can play a better role in the ultra-wideband range.

[0121] In a specific implementation, the low-profile ultra-wideband antenna further includes:

[0122] The first supporting portion 8 , the second supporting portion 9 , the third supporting portion 10 , the fourth supporting portion 11 , and the fifth supporting portion 14 are used together to support and fix the antenna feeder 2 , the branch antenna 3 , and the radiator 1 .

[0123] In one embodiment, the first support part, the second support part, the third support part, the fourth support part, and the fifth support part. These support parts work together to support and fix the antenna feed, the branch antenna, and the radiator to ensure the relative position stability of the antenna components, thereby ensuring the normal working performance and signal transmission stability of the antenna. During the operation of the antenna, these support parts assume important mechanical support functions, so that the antenna can maintain its structural integrity and stability under various environmental conditions, effectively improving the reliability and durability of the antenna.

[0124] In a specific implementation, the low-profile ultra-wideband antenna further includes a cable portion, which includes a cable plastic sheath, an inner conductor, a dielectric layer, an outer conductor and a shielding layer, wherein the inner conductor is electrically connected to the antenna feeder 2 .

[0125] In an embodiment, the low-profile ultra-wideband antenna also includes a cable part, which is composed of a cable plastic sheath, an inner conductor, a dielectric layer, an outer conductor and a shielding layer. Among them, the cable plastic sheath plays a role in protecting the inner conductor and the dielectric layer; the inner conductor is responsible for transmitting electrical signals and is connected to the first feeding part 2-1 of the antenna feed body 2 to achieve the transmission of electrical energy and the feeding of signals; the dielectric layer is filled outside the inner conductor, separating the inner conductor from the outer conductor, playing the role of insulation and support, and also helping to ensure the transmission quality of the signal; the outer conductor acts as a shielding layer, which can effectively shield the interference of external signals, ensure the stable transmission of internal signals, and is welded to the antenna ground part to achieve a good grounding effect.

[0126] A specific embodiment is given below to illustrate the specific application of the low-profile ultra-wideband antenna provided in the embodiment of the present invention. The application requirement in this embodiment is to design an ultra-wideband antenna for a small floor environment (also having a large floor usage environment). The main work is to achieve broadband in the low frequency band and ultra-wideband of the entire antenna. After weighing the size and usage environment, the coupled feeding technology is used to effectively widen the bandwidth of the low frequency band, and the parasitic units are used to expand several other frequency bands.

[0127] This embodiment requires that the antenna be designed within the range of 130mm, 93mm, and 30mm in length, width, and height, respectively. In addition, there must be other antennas in this space, including the thickness of the antenna cover and the floor. The actual use space is 125mm, 90mm, and 26mm in length, width, and height. Fig.14 As shown, only one side of the entire range can be used for design. The antenna must be compatible with the ultra-wide frequency range of 618MHz to 5000MHz. Especially in the low-frequency range of 618MHz-960MHz, it is very difficult to design within the space, and it must also be compatible with the entire frequency band.

[0128] Fig.10 An exemplary diagram of a coupling feeding mode of a low-profile ultra-wideband antenna at different angles provided by an embodiment of the present invention; Fig.11 An exemplary diagram of a coupling feeding method of a low-profile ultra-wideband antenna at different angles provided by an embodiment of the present invention; as described above, Figure 10 to Figure 11 Schematic diagrams of the low-profile ultra-wideband antenna at different angles in this specific embodiment are given respectively. Fig. 12A , Fig. 12B and Fig. 12C The efficiency graph shown has frequency on the horizontal axis and efficiency on the vertical axis.

[0129] 1. This embodiment specifically provides a design concept of a low-profile ultra-wideband antenna, as shown below:

[0130] The first step is to shorten the size of the antenna by grounding the radiator 1 and using the floor mirror image, and to lengthen the size of the antenna as much as possible by making full use of the space, so that the electrical length of the antenna at low frequency is as long as possible. Figure 1 As shown, Figure 1 An example diagram of a conventional feeding antenna of the prior art provided for an embodiment of the present invention, wherein the feeding point to the end of the radiator 1 is bent twice, effectively increasing the path through which the current flows in the radiator 1, thereby increasing the electrical length so that the antenna resonates in the low frequency band, allowing the antenna to utilize the space in the XYZ directions. After traditional feeding, calculation and software simulation, it can be seen that the antenna has a very high radiation efficiency at low frequencies, but the VSWR (voltage standing wave ratio, also known as VSWR and SWR, which is the abbreviation of Voltage Standing Wave Ratio in English) is relatively poor.

[0131] Step 2: Figure 2 An example diagram of a low-frequency standing wave of a conventional feeding antenna in the prior art provided by an embodiment of the present invention; Figure 2 As shown in the figure, after antenna simulation, the antenna can radiate at low frequencies of 618-1150MHz, but the matching is not good. The reflection coefficient between the antenna and the system is too large, which affects the antenna VSWR (even higher than 10) and efficiency. The reflection coefficient between the antenna and the system is too large, causing the system to have too much useless burden. Therefore, it is necessary to design a new coupling feeding structure to complete it. This design not only completes the low-frequency feeding, but also greatly increases the bandwidth and makes the antenna VSWR reach below 3 in the low-frequency range, so that the energy efficiency of the feeding antenna is increased from 30% to 75%. Fig. 12A As shown, Fig. 12A This is an efficiency diagram of a low-profile ultra-wideband antenna in the first frequency band provided by an embodiment of the present invention. Combined with the radiation efficiency of the antenna itself and the attenuation of the cable, the total efficiency of the antenna can eventually reach 34%-70%, so that the impedance of the antenna is matched in the low-frequency band, and the impedance matching of the antenna is provided in the 1700MHz-2700MHz band, so that the antenna also has a good radiation effect in this frequency band.

[0132] Figure 3 This is an example diagram of a coupling feeding method of a low-profile ultra-wideband antenna provided by an embodiment of the present invention. Figure 3As shown, a portion of the second feeding portion 2-2 of the antenna feed 2 parallel to the ground plane is located directly below the low-frequency radiator (i.e., a radiator 1). This arrangement is used to couple and transmit energy to the low-frequency radiator. By displacing the antenna feed in a direction parallel to or perpendicular to the ground plane, the coupling degree and the low-frequency VSWR can be adjusted, and this antenna feed 2 also takes into account the radiation in the 1700MHz-2700MHz frequency band.

[0133] like Figure 4 As shown, Figure 4 The present invention provides an example diagram comparing the standing wave ratio of the traditional feed and the standing wave ratio of the feed of the present invention. The present invention reduces the VSWR from higher than 5 to lower than 3. If only the reflection coefficient of the input port is calculated, the energy efficiency of the feed antenna is increased from 45% to 75%, and the effect is very obvious. Fig. 12B This is an efficiency diagram of a low-profile ultra-wideband antenna in the second frequency band provided by an embodiment of the present invention. Combined with the radiation efficiency of the antenna itself and the attenuation of the cable, the total efficiency of the antenna of the present invention can eventually reach 56%-67%.

[0134] In the third step, according to the requirements, the antenna should also resonate in the range of 3300MHz to 5000MHz. In the present invention, a branch antenna 3 can be made on the antenna feed body 2 by utilizing the space, such as Figure 5 As shown, Figure 5 An example diagram of a branch structure of a low-profile ultra-wideband antenna provided in an embodiment of the present invention is shown. A radiator is led out at a distance of about a quarter wavelength from the floor as a branch antenna 3, and its length is controlled between 13 mm and 20 mm. After calculation and simulation, the branch has a resonance of 3200 MHz to 4400 MHz with less impact on the 2700 MHz frequency band, and VSWR is less than 2. From the simulation software, it can be calculated that the antenna radiation efficiency is fine, and the VSWR is also within the qualified range. The actual antenna also has a relatively good radiation and matching effect in this frequency band. Figure 6 As shown, Figure 6 The example diagram of the standing wave of the antenna with a branch structure provided in the embodiment of the present invention reduces the VSWR of the antenna in the frequency range of 3200MHz to 4400MHz from 4 to 2, and increases the input efficiency of the port part from 64% to 90%. Combined with the radiation efficiency of the antenna itself and the attenuation of the cable, the total efficiency of the antenna can eventually reach 51%-56%. Fig. 12C As shown, Fig. 12C This is an efficiency diagram of a low-profile ultra-wideband antenna in the third frequency band provided by an embodiment of the present invention.

[0135] Step 4: In the previous step, the branch antenna can only obtain a relatively narrow frequency band of 3200MHz-4400MHz due to its own narrowband radiation characteristics. From 4100MHz to 5100MHz, the VSWR of the antenna is the highest 4.5, making the input efficiency of the antenna only 56%. Therefore, a parasitic antenna 5 is further designed, such as Figure 7 As shown, Figure 7 This is an example diagram of a side view of a low-profile ultra-wideband antenna provided by an embodiment of the present invention. The parasitic antenna 5 is about one-quarter of the preset wavelength away from the antenna feed 2. The parasitic antenna 5 can tune the impedance of the antenna in this frequency band, so that the standing wave of the antenna in this frequency band is improved, and the VSWR is completely reduced from 4.5 to below 2, so that the input efficiency of the antenna is increased from 59% to 90%. Combined with the radiation efficiency of the antenna itself and the attenuation of the cable (relative to the attenuation of the 1700MHz-3100MHz cable to 5GHz is greater), the total efficiency of the antenna can eventually reach 47%-51%. Fig. 12C As shown, Fig. 12C This is an efficiency diagram of a low-profile ultra-wideband antenna in the third frequency band provided by an embodiment of the present invention.

[0136] Figure 8 An example diagram of the comparison between the antenna standing wave ratio provided in the embodiment of the present invention and the standing wave ratio of the antenna without parasitic antenna is shown in FIG. Figure 8 As shown, in the range of 618MHz-1150MHz, VSWR<3; 1700MHz-5000Mhz, VSWR<2, as shown in Fig.13 As shown, Fig.13 An example diagram of VSWR obtained by performing a physical test on a low-profile ultra-wideband antenna provided in an embodiment of the present invention.

[0137] Second, this embodiment specifically provides a specific structure of a low-profile ultra-wideband antenna, as shown below:

[0138] The radiator 1 is electrically connected to the ground plane 6, thereby effectively reducing the size of the antenna in the low frequency band. It is supported by the second support part 9, the third support part 10, and the fifth support part 14. The radiator 1 exhibits good radiation function in the 618MHz-1150MHz frequency band, effectively converting electrical energy into electromagnetic waves and radiating them into space, thereby realizing signal transmission and reception in this frequency band. At the same time, the radiator 1 also plays an auxiliary radiation role in the 1700MHz frequency band through coupling, expanding the radiation performance of the antenna in the high frequency band, and achieving better frequency band connection and collaborative work between the low frequency band and part of the high frequency band.

[0139] The antenna feed 2 is supported by the first support portion 8 and the fourth support portion 11 to ensure that its position in the antenna system is stable. Through the welding point, the antenna feed 2 firmly fixes the branch antenna 3 together to form a whole. As the signal transmission hub of the entire antenna, the antenna feed 2 plays an important role in the 1700MHz-2700MHz frequency band, assisting in radiating the signals of this frequency band into the air. It can receive energy from the feeding point and effectively transmit it to the radiator 1 and the branch antenna 3 and other related components to ensure that each component has sufficient energy supply when working and maintain the normal operation of the antenna system.

[0140] The branch antenna 3 is connected to the first feeding part 2-1 of the antenna feed body 2 to obtain the energy required for work. In the 2700MHz-3800MHz frequency band, the branch antenna 3 mainly undertakes the radiation task, converts the received electrical energy into electromagnetic waves for radiation, and realizes the signal transmission in this frequency band. In addition, the branch antenna 3 also plays an auxiliary radiation role in the 3800MHz-4400MHz frequency band, and works with the parasitic antenna 5 and other components to enhance the radiation performance of the antenna in this frequency band, improve the signal coverage and transmission quality, and make the antenna work more stable and efficient in the medium and high frequency bands.

[0141] The antenna feed only partially overlaps with the radiator 1 in a top view to form a coupled feed structure 4. This unique structural design makes it of great significance in the operation of the antenna. In the 1700MHz-2700MHz frequency band, the coupled feed structure 4 is responsible for radiating signals, especially when the antenna operates in this frequency band, the main radiation is performed in the edge area away from the low-frequency radiation, which optimizes the radiation pattern and performance of the antenna in this frequency band. At the same time, through the coupled feeding effect with the radiator 1, the coupled feed structure 4 significantly improves the radiation function of the antenna in the 618MHz-1150MHz frequency band, making the radiation of the antenna in this low-frequency band more stable and efficient. In the design of low-profile miniaturized antennas, the coupled feed structure 4 can adapt to a wider frequency range, and takes into account the performance of the antenna working independently and being placed on a large floor, so that the antenna can maintain a good working condition in different usage environments.

[0142] The parasitic antenna 5 is only connected to the ground plane 6. Since the antenna feed 2 and the branch antenna 3 cannot radiate signals in the 4400MHz-5000MHz frequency band, the parasitic antenna 5 plays a role in complementing the frequency band performance. The parasitic antenna 5 obtains energy supply through coupling with the antenna feed 2, so that it can radiate energy in the 4400MHz-5000MHz frequency band and realize signal transmission in this frequency band. In addition, the parasitic antenna 5 also plays an auxiliary radiation role in the 3800MHz-4400MHz frequency band, and cooperates with the branch antenna 3 and other components to further expand the radiation range of the antenna in the high frequency band, improve the performance of the antenna in the entire high frequency band, and enable the antenna to achieve a wider range of ultra-wide frequency band coverage, meeting the needs of different communication scenarios for high frequency band signal transmission.

[0143] The grounding portion 7 connects the radiator 1 and the ground plane 6. This connection ensures that the radiator 1 can achieve a stable electrical connection with the floor 6. When the antenna is working, the energy can flow back to the ground plane 6 smoothly. This feature plays a key role in optimizing the electrical performance of the antenna, and can effectively reduce the size of the antenna, thereby improving the radiation efficiency and signal transmission stability of the antenna, so that the antenna can better function within the ultra-wideband range. For example, in actual application scenarios, a good connection of the grounding portion 7 helps reduce electromagnetic interference inside the antenna and improve the antenna's ability to receive and transmit signals.

[0144] The first support portion 8 and the fourth support portion 11 cooperate with each other to support and fix the antenna feed 2 and the branch antenna 3. During the operation of the antenna, this support and fixation ensures the relative position stability of the antenna feed 2 and the branch antenna 3, thereby ensuring the normal working performance and signal transmission stability of the antenna. For example, when the antenna is subjected to external vibration or interference, the first support portion 8 and the fourth support portion 11 can prevent the antenna feed 2 and the branch antenna 3 from being displaced, thereby maintaining the normal operation of the antenna system.

[0145] The second support portion 9 works together with the third support portion 10 and the fifth support portion 14 to support and fix the radiator 1 and the ground portion 7. They provide stable support for the radiator 1, so that it can maintain a stable state during operation, and at the same time ensure that the connection between the ground portion 7 and the radiator 1 is reliable, which is conducive to the performance of the antenna in the low frequency band. For example, during the radiation of low-frequency signals, the second support portion 9, the third support portion 10 and the fifth support portion 14 can ensure the structural integrity of the radiator 1, so that it can effectively radiate electromagnetic radiation.

[0146] The third support portion 10, together with the second support portion 9 and the fifth support portion 14, supports and fixes the radiator 1 and the ground portion 7. This helps to maintain the position of the radiator 1 stable and ensures that it is well connected to the ground portion 7, thereby ensuring the radiation performance of the antenna in various frequency bands and the stability of the electrical connection. For example, when the antenna works in different frequency bands, the cooperation of the third support portion 10 and other support portions can enable the radiator 1 to adapt to different working conditions and achieve stable signal transmission.

[0147] The fourth support portion 11 and the first support portion 8 jointly complete the task of supporting and fixing the antenna feed 2 and the branch antenna 3. They work together to ensure that the antenna feed 2 and the branch antenna 3 are accurately positioned in the antenna system, providing reliable protection for the energy transmission and signal radiation of the antenna. For example, when the branch antenna 3 radiates a signal, the fourth support portion 11 and the first support portion 8 can ensure that its radiation direction and performance are not affected.

[0148] The fifth support portion 14 cooperates with the second support portion 9 and the third support portion 10 to support and fix the radiator 1 and the ground portion 7. Together, they maintain the structural stability of the radiator 1 and the ground portion 7, so that the antenna can maintain good electrical performance and mechanical stability during operation. For example, during the installation and use of the antenna, the fifth support portion 14, together with other support portions, prevents the radiator 1 and the ground portion 7 from being damaged or deformed.

[0149] The cable 12 is composed of multiple parts, and its plastic sheath is fixed to the ground plane 6 by a cable stopper 13 to ensure that the cable remains stable within a specific range. The inner conductor of the cable is connected to the first feeding part to form a feeding point, which is a key node for antenna energy transmission and is responsible for transmitting electrical energy to the antenna system. The dielectric layer is filled outside the inner conductor to separate the inner conductor from the outer conductor, which can not only achieve insulation, but also support the cable structure to ensure the quality of signal transmission. The outer conductor acts as a shielding layer to effectively shield the interference of external signals and ensure the stable transmission of internal signals. The outer conductor is welded to the antenna ground part to achieve a good grounding effect, further improving the anti-interference ability of the antenna system. The cable stopper 13 limits the cable to prevent the cable from excessive displacement or shaking during use, thereby ensuring the stability of the antenna system. For example, in a complex electromagnetic environment, these structural features of the cable 12 can ensure that the antenna receives clear and stable signals and improve the working reliability of the antenna.

[0150] Of course, it is understandable that the above detailed process may have other variations, and the relevant variations should all fall within the protection scope of the present invention.

[0151] 3. This embodiment specifically provides a solution for achieving radiation in the first frequency band, the second frequency band, the third frequency band, the fourth frequency band and the fifth frequency band, as shown below:

[0152] The first frequency band (618MHz-1150MHz) radiation solution

[0153] Radiator design: The radiator 1 is electrically connected to the ground plane 6, and the radiator grounding and floor mirror principle are cleverly used to effectively shorten the antenna size. At the same time, the space potential is fully tapped to stretch the electrical length of the antenna at low frequencies, so that it has a longer electrical length in the low frequency band, thereby having higher radiation efficiency at low frequencies. For example, by carefully planning the antenna layout, the antenna can make full use of the space in the XYZ direction to achieve efficient radiation under the traditional feeding method.

[0154] Coupled feed design: The radiator 1 and the antenna feed 2 form a coupled feed structure 4 to construct a coupled feed mode. From a top view perspective, only part of the antenna feed 2 and the radiator 1 overlap to form a coupled feed structure 4, and the two achieve energy coupling through this overlapping area. This design not only achieves good radiation function of the antenna in the 618MHz-1150MHz frequency band, but also greatly increases the antenna bandwidth, improves the low-frequency electrical length, and takes into account the role of radiating other frequency bands, such as auxiliary radiation of the 1700MHz frequency band, so that the antenna can achieve good transition and collaborative work between the low-frequency band and some high-frequency bands.

[0155] Second frequency band (1700MHz-2700MHz) radiation solution

[0156] Antenna feed design: The antenna feed 2 and the radiator 1 partially overlap in projection along the direction perpendicular to the ground plane 6. The antenna feed 2 is only partially located directly below the radiator 1, which is used to couple and transmit energy to the low-frequency part. By adjusting the displacement in the direction parallel to or perpendicular to the ground plane, the coupling degree can be accurately controlled, and then the VSWR of the antenna low frequency can be adjusted, so that the antenna can achieve good impedance matching in the low-frequency range, for example, the VSWR can be reduced to less than 3.

[0157] Radiation function design: Antenna feeder 2 not only completes the low-frequency feeding task, but also takes into account the radiation of the 1700MHz-2700MHz frequency band. From the simulation results, the antenna has a high radiation efficiency in this frequency band, and the standing wave situation clearly shows that its matching effect is good, thus ensuring that the antenna can stably and efficiently radiate signals in this frequency band to meet communication needs.

[0158] Radiation scheme for the third frequency band (2700MHz-3800MHz): The branch antenna 3 is set on the antenna feed 2 and is the key to the radiation in this frequency band. For example, the branch antenna 3 is carefully designed on the feed 2 of the feed antenna. After precise calculation and simulation optimization, it is ensured that the branch has little impact on the 2700MHz frequency band, and the effective radiation of the 2700MHz-3800MHz frequency band is achieved, and the electrical energy is efficiently converted into electromagnetic waves to complete the signal transmission task in this frequency band.

[0159] Radiation scheme for the fourth frequency band (3800MHz-4400MHz): The branch antenna 3 plays an auxiliary radiation role in this frequency band, and cooperates with other components to enhance the radiation performance of the antenna in the 3800MHz-4400MHz frequency band. At the same time, the parasitic antenna 5 may also participate in auxiliary radiation. The two work together to improve the signal coverage and transmission capacity of the antenna in this frequency band, ensure stable and reliable signal transmission, and meet the requirements of the communication system for this frequency band.

[0160] Radiation scheme for the fifth frequency band (4400MHz-5000MHz): The parasitic antenna 5 is set on the ground plane and is the core of achieving radiation in this frequency band. In order to achieve effective radiation in this frequency band, the size of the parasitic antenna 5 is designed to match the characteristics of the frequency band. For example, the size of the parasitic antenna 5 is set to have a preset proportional relationship with the wavelength of the center frequency of the frequency band, so that it can achieve good radiation effect in the 4400MHz-5000MHz frequency band, effectively convert energy into electromagnetic waves to radiate outward, and achieve signal transmission and coverage in this frequency band.

[0161] Through the synergistic effect of the above-mentioned frequency band radiation schemes, the branch antenna 3 and the parasitic antenna 5 cooperate with each other to achieve effective radiation of the antenna in the third frequency band, the fourth frequency band and the fifth frequency band, and together with the first frequency band and the second frequency band, constitute a continuous frequency band coverage from low frequency to high frequency, meeting the working requirements of the ultra-wideband antenna in different frequency bands, ensuring that the antenna operates stably and efficiently in the entire working frequency band, and providing reliable signal transmission guarantee for the communication system.

[0162] Fourth, this embodiment specifically provides a design scheme for achieving low-profile characteristics of the antenna, as shown below:

[0163] 1. Radiator 1 is connected to ground plane 6

[0164] By electrically connecting the radiator 1 to the ground plane 6, the antenna size is shortened by using the floor mirror. This design makes full use of the space, so that the antenna can effectively reduce the size at low frequencies and achieve a low-profile design. For example, the radiator 1 is placed on the floor and fixed by a specific support structure to form a good electrical connection with the ground plane, thereby achieving low-frequency radiation without increasing the height of the antenna.

[0165] 2. Optimize antenna feed layout

[0166] A portion of the XY plane of the second feeding portion 2-2 is directly below the radiator 1. This layout reduces the space occupied in the vertical direction and helps to reduce the overall height of the antenna. At the same time, the antenna feeder is fixed and limited by the support structure, so that it remains stable without increasing the extra height.

[0167] 3. Reasonable use of support structure

[0168] A plurality of support parts are used, such as a first support part 8, a second support part 9, a third support part 10, a fourth support part 11 and a fifth support part 14, which can minimize the space occupied while ensuring the stability of the antenna structure to achieve a low profile design. For example, the height and position of the support parts are carefully designed to minimize the overall thickness of the antenna.

[0169] 4. This embodiment provides a design scheme for achieving low-profile antenna characteristics, which has the following effects:

[0170] ①Adapt to the needs of miniaturized equipment

[0171] As modern electronic devices continue to develop towards miniaturization, lightness and thinness, low-profile antennas can be better integrated into various space-constrained devices, such as smartphones, tablets, wearable devices, etc. Without taking up too much space, the device can achieve a more compact design while maintaining high-performance communication capabilities.

[0172] For example, in a smartphone, a low-profile antenna can be placed in a small space inside the phone without increasing the thickness of the phone, making the phone thinner and more portable.

[0173] ② Improve equipment stability and reliability

[0174] Since the low-profile antenna has a lower center of gravity, it is more stable when installed on the device. During the use of the device, it is not easily affected by external vibrations, collisions and other factors, thereby improving the overall stability and reliability of the device.

[0175] For example, in vehicle-mounted communication equipment, when a low-profile antenna is installed on the top or side of a vehicle, it will not become loose or damaged due to bumps during driving, thus ensuring the stability of communication.

[0176] ③ Improve the appearance of the equipment

[0177] Low-profile antennas can be better integrated into the appearance design of the device without affecting the overall aesthetics of the device. For some devices with high requirements on appearance, such as high-end electronic products and smart home devices, the design of low-profile antennas can make the device more beautiful and elegant.

[0178] For example, in smart watches, low-profile antennas can be hidden inside the watch strap or case, without affecting the watch's exterior design, while achieving wireless communication functions. For example, by rationally designing the radiator, feeding structure, and coupling method for each frequency band, the antenna can achieve good transition and signal transmission between different frequency bands, thus improving the ultra-wideband performance of the entire antenna.

[0179] The low-profile ultra-wideband antenna provided in an embodiment of the present invention includes: a radiator 1, which is electrically connected to a ground plane 6 and is used for effective radiation of the antenna in a first frequency band; an antenna feeder 2, which partially overlaps with the radiator 1 in a direction perpendicular to the ground plane 6, and the overlapping parts of the projections are coupled to each other to form a coupling feeding structure 4; the antenna feeder 2 is used to transmit energy to the radiator 1 and act as a radiator to provide impedance matching in the second frequency band; the coupling feeding structure 4 is used to perform coupling feeding to achieve impedance matching in the first frequency band and expand the impedance bandwidth of the first frequency band; a branch antenna 3 is arranged on the antenna feeder 2, and is used to provide radiation in a third frequency band and assist the parasitic antenna 5 in radiation in a fourth frequency band; the parasitic antenna 5 is arranged on the ground plane and is used to provide radiation in a fifth frequency band; wherein there is a discontinuous frequency band between the first frequency band and the second frequency band; the second frequency band, the third frequency band, the fourth frequency band and the fifth frequency band jointly cover continuous frequency bands from low frequency to high frequency, and are arranged in ascending order of frequency. In the embodiment of the present invention, the electrical length of the antenna is increased by the radiator and its special coupling feeding method, so as to solve the problem of size limitation, thereby achieving better low-frequency performance in a limited space; the coupling feeding structure is formed by the antenna feeder and the radiator to achieve biased coupling feeding to solve the bandwidth problem, especially to provide better bandwidth in the low frequency band, improve the VSWR of the low frequency band, and also improve the coupling and matching between different frequency bands; by adding branch antennas to the antenna feeder to cover additional frequency bands, the problem of frequency band compatibility is solved, thereby expanding the working range of the antenna without affecting the performance of the main frequency band; by setting a parasitic antenna, the high frequency band coverage of the antenna is further expanded; the low-profile ultra-wideband antenna provided by the present invention can achieve ultra-wide frequency band coverage in a limited space, and can provide good radiation performance and impedance matching effect in each frequency band.

[0180] In addition, this low-profile ultra-wideband antenna has significant advantages in practical applications. In the field of communications, it can meet the needs of different communication systems for multi-band, high-performance antennas. Whether in scenarios such as mobile communications, satellite communications or wireless LANs, the antenna can stably transmit signals to ensure the quality and reliability of communications.

[0181] For equipment manufacturers, the use of this antenna can reduce the number of antennas in the device and the space occupied, reduce production costs and design complexity. At the same time, due to its good radiation performance and impedance matching effect, it can improve the overall performance and competitiveness of the equipment.

[0182] In terms of installation and use, the low-profile design makes it easier to integrate the antenna into a variety of devices, whether small electronic devices or large communication equipment. In addition, the ultra-wideband characteristics enable the device to maintain good communication performance under different usage environments and communication requirements, without the need to frequently replace the antenna or make complex adjustments.

[0183] As mentioned above, the present invention has the following innovative features:

[0184] 1. Integrated design and high integration: The antenna of the present invention uses a special coupling feeding form of a low-profile small antenna. This design significantly improves the integration of the antenna. In a limited space, the various parts of the antenna can be closely combined and cooperate with each other to achieve multiple functions. For example, the antenna feeding part is responsible for transmitting energy and providing impedance matching, the branch part assists in radiation in different frequency bands, and the coupling part achieves good radiation and bandwidth expansion in the low frequency band. The synergistic effect of each part optimizes the overall performance of the antenna.

[0185] 2. Multiple technologies are used to debug antenna modal performance: In order to ensure that the antenna has good performance in different frequency bands, the present invention uses multiple technologies to debug the antenna modal performance. Through the careful design and adjustment of antenna structure, size, material and other parameters, the radiation performance and impedance matching effect of the antenna in different frequency bands are optimized. In low-profile miniaturized antennas, its outstanding bandwidth performance can meet the bandwidth requirements of diversified communication systems and effectively improve communication quality and data transmission rate. At the same time, the design takes into account both independent antenna operation and large floor working scenarios to ensure that the antenna maintains good performance in various usage environments.

[0186] 3. Diversified antenna shape design

[0187] The shape diversity of the antenna feeder 2: The antenna feeder 2 in the present invention can be rectangular, trapezoidal with a wide top and narrow bottom, semicircular, etc. This diversified design can be flexibly selected according to different application requirements and space constraints, enhancing the adaptability and flexibility of the antenna, so that the antenna can better adapt to various complex working scenarios and installation environments.

[0188] Shape selection of radiator 1: The shape of radiator 1 includes L-shape, square, rectangle, U-shape and other options. The design of these shapes can be optimized according to the low-frequency radiation requirements and spatial layout differences, thereby improving the radiation performance and bandwidth performance of the antenna in the low-frequency band and meeting the antenna performance requirements of different low-frequency communication scenarios.

[0189] In summary, the present invention successfully realizes the design of low-profile ultra-wideband antennas by means of innovative means such as special coupling feeding form of low-profile small antennas, diversified antenna shape design, antenna ultra-wideband technology, and diversified branch antenna and parasitic antenna shape design. The antenna has high integration, good radiation function, excellent bandwidth performance, ultra-wideband coverage capability, and a variety of shape options. It can fully meet the diverse requirements of different communication systems for antenna performance and has important application value and broad application prospects in the field of modern communications.

[0190] The embodiment of the present invention also provides a working method of a low-profile ultra-wideband antenna, which is used to achieve ultra-wideband coverage in a limited space and provide good radiation performance and impedance matching effect in each frequency band. Fig. 9 As shown, the method includes:

[0191] Step 901: The radiator performs effective radiation of the antenna in the first frequency band;

[0192] Step 902: the antenna feeder transmits energy to the radiator and acts as a radiator to provide impedance matching in the second frequency band; the antenna feeder and the radiator partially overlap in projection along a direction perpendicular to the ground plane, and the overlapping projection parts are coupled to form a coupled feeding structure;

[0193] Step 903: coupling the feeding structure to perform coupling feeding to achieve impedance matching in the first frequency band and expand the impedance bandwidth of the first frequency band;

[0194] Step 904: the branch antenna provides radiation in the third frequency band and assists the parasitic antenna in radiation in the fourth frequency band;

[0195] Step 905: The parasitic antenna provides radiation in the fifth frequency band; wherein there is a discontinuous frequency band between the first frequency band and the second frequency band; the second frequency band, the third frequency band, the fourth frequency band and the fifth frequency band together cover continuous frequency bands from low frequency to high frequency, and are arranged in ascending order of frequency.

[0196] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0197] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0198] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0199] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0200] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A low-profile ultra-wideband antenna, characterized in that: include: A radiator (1) is electrically connected to the ground plane (6) and is used for effectively radiating the antenna in a first frequency band; The antenna feeder (2) partially overlaps with the radiator (1) in a projection along a direction perpendicular to the ground plane (6), and the overlapping projection parts are coupled to each other to form a coupled feeding structure (4); the antenna feeder (2) is used to transmit energy to the radiator (1) and act as a radiator in the second frequency band to provide impedance matching; the coupled feeding structure (4) is used to perform coupled feeding to achieve impedance matching in the first frequency band and expand the impedance bandwidth of the first frequency band; A branch antenna (3) is arranged on the antenna feeder (2) and is used to provide radiation in a third frequency band and assist the parasitic antenna (5) in radiating in a fourth frequency band; A parasitic antenna (5), arranged on the ground plane, for providing radiation in a fifth frequency band; wherein there is a discontinuous frequency band between the first frequency band and the second frequency band; the second frequency band, the third frequency band, the fourth frequency band and the fifth frequency band jointly cover a continuous frequency band from low frequency to high frequency, and are arranged in ascending order of frequency; The antenna feeder (2) comprises a first feeding part (2-1) and a second feeding part (2-2); one end of the first feeding part (2-1) is connected to the inner conductor of the cable to form a feeding point; the first feeding part (2-1) is used to exchange energy with the parasitic antenna (5) through coupling, to provide a connection carrier for the branch antenna (3), and to provide energy to the branch antenna (3) through the feeding point.

2. The low-profile ultra-wideband antenna according to claim 1, characterized in that: The coupling feeding structure is also used to assist in radiating the second frequency band through coupling feeding.

3. The low-profile ultra-wideband antenna according to claim 1, characterized in that: The second feeding portion (2-2) is partially located directly below the radiator (1), and optimizes the antenna voltage standing wave ratio by adjusting the coupling degree through displacement in a direction perpendicular to the ground plane (6) and optimizing the area of ​​the coupling feeding structure (4).

4. The low-profile ultra-wideband antenna according to claim 1, characterized in that: The parasitic antenna (5) is also used to mainly radiate the fifth frequency band and auxiliary radiate the fourth frequency band.

5. The low-profile ultra-wideband antenna according to claim 1, characterized in that: The height of the parasitic antenna (5) is calculated according to the wavelength of the center frequency of the fifth frequency band.

6. The low-profile ultra-wideband antenna according to claim 1, characterized in that: The length direction of the branch antenna (3) is parallel to the ground plane (6) or presents a preset angle.

7. The low-profile ultra-wideband antenna according to claim 1, characterized in that: The shape of the radiator (1) is L-shaped, square, rectangular or U-shaped.

8. The low-profile ultra-wideband antenna according to claim 1, characterized in that: The low-profile ultra-wideband antenna also includes: A grounding portion (7) connects the radiator (1) and the ground plane (6), so that the radiator (1) can be electrically connected to the ground plane (6).

9. The low-profile ultra-wideband antenna according to claim 1, characterized in that: The low-profile ultra-wideband antenna also includes: The first support portion (8), the second support portion (9), the third support portion (10), the fourth support portion (11), and the fifth support portion (14) are used together to support and fix the antenna feeder (2), the branch antenna (3), and the radiator (1).

10. The low-profile ultra-wideband antenna according to claim 1, characterized in that: The low-profile ultra-wideband antenna also includes a cable part, which includes a cable plastic sheath, an inner conductor, a dielectric layer, an outer conductor and a shielding layer, wherein the inner conductor is electrically connected to the antenna feeder (2).

11. A method for operating a low-profile ultra-wideband antenna, characterized in that: Applied to the low-profile ultra-wideband antenna according to any one of claims 1 to 10, the method comprises: The radiator performs effective radiation of the antenna in the first frequency band; The antenna feeder transmits energy to the radiator and acts as a radiator to provide impedance matching in the second frequency band; the antenna feeder and the radiator partially overlap in projection along a direction perpendicular to the ground plane, and the overlapping projection parts are coupled to each other to form a coupled feeding structure; The coupled feeding structure performs coupled feeding to achieve impedance matching in the first frequency band and expand the impedance bandwidth of the first frequency band; The branch antenna provides radiation in the third frequency band and assists the parasitic antenna in the radiation in the fourth frequency band; The parasitic antenna provides radiation in the fifth frequency band; There is a discontinuous frequency band between the first frequency band and the second frequency band; the second frequency band, the third frequency band, the fourth frequency band and the fifth frequency band jointly cover continuous frequency bands from low frequency to high frequency, and are arranged in ascending order of frequency.

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