Miniaturized ultra-wideband flexible end-on-fire antenna and aircraft with antenna

Abstract

The invention belongs to the field of antennas, and particularly discloses a miniaturized ultra-wide-band flexible end-on-fire antenna and an aircraft with the antenna, the miniaturized ultra-wide-band flexible end-on-fire antenna comprises an antenna body, the antenna body is used for being fixedly installed on an aircraft carrier and conformal with the aircraft carrier, and the antenna body adopts a horizontal polarization half-mode Vivaldi antenna and is horizontally arranged. The antenna body adopts the horizontal polarization half-mode Vivaldi antenna, the size of the antenna is reduced by half compared with that of a traditional antenna, the antenna has the characteristics of ultra wide band, miniaturization, low profile, end fire and the like, meanwhile, the antenna body and an aircraft carrier are installed in a conformal mode, the occupied volume is reduced, and the antenna can be suitable for being installed on an aircraft for application.

Description

Technical Field

[0001] The present application belongs to the field of antennas, and more specifically, to a miniaturized ultra-wideband flexible end-fire antenna and an aircraft having the antenna. Background Art

[0002] With the continuous development of wireless communication technology, the components of aircraft tend to be intelligent, integrated and automated. The aircraft realizes detection, navigation and communication functions through the seeker. The antenna is one of the most critical components at the front end of the system. The end-fire antenna is suitable for high-speed motion aircraft systems. The conformal end-fire antenna array is used to effectively realize the end-fire conformal direction finding function, and plays an increasingly important role in the fields of ultra-wideband passive direction finding, phased array radar, etc.

[0003] Traditional antennas do not meet the performance and miniaturization requirements of aircraft due to their large size, lack of conformality, narrow bandwidth, and other issues, making them difficult to use on aircraft. Summary of the invention

[0004] In view of the defects of the prior art, the present application provides a miniaturized ultra-wideband flexible end-fire antenna and an aircraft having the antenna, aiming to solve the problems that the existing antennas are large in size, narrow in bandwidth, and difficult to be conformally installed with the aircraft carrier.

[0005] The present application provides a miniaturized ultra-wideband flexible end-fire antenna, comprising an antenna body, wherein the antenna body is used to be fixedly mounted on an aircraft carrier and conformal to the aircraft carrier, and the antenna body adopts a horizontally polarized half-mode Vivaldi antenna and is horizontally arranged.

[0006] Through the above technical scheme conceived by the present application, compared with the prior art, since the antenna body of the present application adopts a horizontally polarized half-mode Vivaldi antenna, a 9-fold frequency ultra-wideband end-fire characteristic can be achieved at a smaller profile height, and the antenna size is reduced by half compared to traditional antennas. It has the characteristics of ultra-wideband, miniaturization, low profile and end-fire. At the same time, the antenna body is conformally installed with the aircraft carrier to reduce the volume occupancy and reserve sufficient space for other integrated devices, which can achieve the beneficial effect of being suitable for installation on aircraft.

[0007] As a further preference, the antenna body includes a high temperature resistant flexible substrate, the side of the high temperature resistant flexible substrate facing away from the aircraft carrier is a copper-clad surface and is etched with a radiation copper plating layer and a guide copper plating layer, and the area of ​​the radiation copper plating layer is larger than the area of ​​the guide copper plating layer.

[0008] By adopting the above technical solution, the antenna body can easily achieve conformality with the aircraft carrier and can achieve stable antenna performance when the aircraft is flying at high speed. At the same time, high-precision and high-resolution etching can be achieved to facilitate the manufacture of fine circuits.

[0009] As a further preferred embodiment, the antenna body also includes a metal conductor, which is fixedly connected to the high temperature resistant flexible substrate. The radiation copper plating layer is the antenna current distribution surface. The side of the radiation copper plating layer close to the metal conductor is etched into an exponential gradient line form and forms an exponential conical gap slot line structure with the metal conductor, serving as the main radiator of the antenna.

[0010] By adopting the above technical solution, when current flows through the metal sheets of the Vivaldi antenna, an interaction between the electric field and the magnetic field is generated between the metal sheets. This interaction causes electromagnetic waves to propagate inside the antenna and eventually radiate into space. The electric field propagates along the exponentially tapered slot line. The increase in the slot line expands the low-frequency working characteristics. The gradient slot line area of ​​the Vivaldi antenna can be divided into a low-frequency radiation area and a high-frequency radiation area. The low-frequency radiation area is located in an area with a wider opening near the end of the slot line, while the high-frequency radiation area is located in an area with a narrower opening near the feed end. This partitioning enables the Vivaldi antenna to maintain good radiation characteristics in different frequency bands.

[0011] As a further preferred embodiment, a plurality of semi-elliptical grooves are etched on a side of the radiation copper plating layer away from the metal conductor, and the areas of the plurality of semi-elliptical grooves decrease gradually along the extension direction of the exponential gradient line.

[0012] By adopting the above technical solution, the semi-elliptical groove can change the current flow path on the antenna surface. The use of semi-elliptical grooves of different sizes further lengthens the current flow path, which can improve the low-frequency impedance characteristics of the antenna and increase the antenna bandwidth.

[0013] As a further preferred embodiment, a semicircular short-circuit cavity is etched at the starting end of the exponential tapered slot line of the radiation copper plating layer, and a feeding point for feeding the antenna is arranged on one side of the semicircular short-circuit cavity close to the starting end of the exponential tapered slot line.

[0014] By adopting the above technical solution, the semicircular short-circuit cavity can improve the impedance matching of the antenna, and the antenna can be fed through the feeding point, and the feeding coaxial cable can be welded.

[0015] As a further preferred embodiment, matching resistors are provided at the end of the exponential tapered slot line of the radiation copper plating layer and at a side of the semicircular short-circuit cavity away from the starting end of the exponential tapered slot line.

[0016] By adopting the above technical solution, the impedance matching of the antenna at the low frequency can be improved through matching resistance, the low-frequency characteristics of the antenna can be optimized, and the lowest operating frequency of the antenna can be extended to 2 GHz, thereby achieving ultra-wideband characteristics.

[0017] As further preferred, the guide copper plating layer is an elliptical structure.

[0018] By adopting the above technical solution, the guiding copper-plated layer with an elliptical structure can improve the radiation characteristics of the antenna pattern, optimize the splitting trend of the high-frequency band pattern, and have a guiding effect on the low-frequency band pattern.

[0019] As further preferred, the high temperature resistant flexible substrate is a polyimide film material with a dielectric constant of 3.0 to 4.0 and a thickness of 0.025 mm to 0.1 mm.

[0020] By adopting the above technical solution, the high temperature resistant flexible substrate can be bent arbitrarily to achieve conformal installation with the aircraft carrier, and it has good electrical insulation properties, which can reduce delays and energy losses during signal transmission. At the same time, after the printed circuit board is manufactured, it can maintain the dimensional stability and performance of the circuit.

[0021] The present application provides an aircraft, comprising an aircraft carrier and the miniaturized ultra-wideband flexible end-fire antenna, wherein the miniaturized ultra-wideband flexible end-fire antenna is mounted on the aircraft carrier.

[0022] As a further preferred embodiment, it further comprises a support member, through which the antenna body is fixedly mounted on the aircraft carrier, and the support member is conformal to the aircraft carrier.

[0023] As further preferred, the support member is made of high temperature resistant foam material.

[0024] By adopting the above technical solution, the support member is light in weight, can better support the antenna body, and is easy to be configured conformally with the aircraft. At the same time, the support member is made of high temperature resistant material, which can achieve stable antenna performance when the aircraft is flying at high speed.

[0025] In general, the above technical solutions conceived by this application have the following technical advantages compared with the prior art:

[0026] 1. The antenna body in this application adopts a horizontally polarized half-mode Vivaldi antenna. The antenna size is reduced by half compared to the traditional antenna. It has the characteristics of ultra-wideband, miniaturization, low profile and end-fire. At the same time, the antenna body and the support are conformally installed with the aircraft carrier to reduce the volume occupancy and reserve sufficient space for other integrated devices. It can be suitable for installation on the aircraft.

[0027] 2. In the present application, an exponentially conical slot line structure is formed on the antenna body, and the electric field propagates along the exponentially conical slot line. The addition of the slot line expands the low-frequency working characteristics, enabling the Vivaldi antenna to maintain good radiation characteristics in different frequency bands.

[0028] 3. The semi-elliptical grooves in this application can change the current flow path on the antenna surface. The use of semi-elliptical grooves of different sizes further lengthens the current flow path, which can improve the low-frequency impedance characteristics of the antenna and increase the antenna bandwidth.

[0029] 4. This application can improve the impedance matching of the antenna at low frequency through matching resistance, optimize the low-frequency characteristics of the antenna, expand the minimum operating frequency of the antenna to 2GHz, and achieve ultra-wideband characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is an exploded view of an aircraft carrier, a support member and an antenna body provided in an embodiment of the present application;

[0031] Figure 2 It is a schematic diagram of the overall structure of the antenna body provided in an embodiment of the present application;

[0032] Figure 3 This is an antenna electric field distribution diagram at 2 GHz of a miniaturized ultra-wideband flexible end-fire antenna for an aircraft provided in an embodiment of the present application;

[0033] Figure 4 This is an antenna electric field distribution diagram at 6 GHz of a miniaturized ultra-wideband flexible end-fire antenna for an aircraft provided in an embodiment of the present application;

[0034] Figure 5 This is an antenna electric field distribution diagram at 12 GHz of a miniaturized ultra-wideband flexible end-fire antenna for an aircraft provided in an embodiment of the present application;

[0035] Figure 6 This is an antenna electric field distribution diagram at 18 GHz of a miniaturized ultra-wideband flexible end-fire antenna for an aircraft provided in an embodiment of the present application;

[0036] Figure 7 is a voltage standing wave ratio curve of a miniaturized ultra-wideband flexible end-fire antenna for an aircraft provided in an embodiment of the present application;

[0037] Figure 8 The antenna pattern at 2 GHz of the miniaturized ultra-wideband flexible end-fire antenna for aircraft provided in an embodiment of the present application;

[0038] Fig. 9 The antenna pattern at 6 GHz of the miniaturized ultra-wideband flexible end-fire antenna for aircraft provided in an embodiment of the present application;

[0039] Fig.10 The antenna pattern at 12 GHz of the miniaturized ultra-wideband flexible end-fire antenna for aircraft provided in an embodiment of the present application;

[0040] Fig.11This is the antenna pattern at 18 GHz of a miniaturized ultra-wideband flexible end-fire antenna for an aircraft provided in an embodiment of the present application.

[0041] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0042] 1. Aircraft carrier; 2. Support; 3. Antenna body; 301. Radiating copper plating layer; 302. Leading copper plating layer; 303. High temperature resistant flexible substrate; 304. Semi-elliptical groove; 305. Semi-circular short-circuit cavity; 306. Feeding point; 307. Matching resistor; 308. Metal conductor. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0044] Reference Figure 1-2 The present application discloses a miniaturized ultra-wideband flexible end-fire antenna, which is applied to the passive guidance head of an aircraft. The miniaturized ultra-wideband flexible end-fire antenna is fixedly installed on an aircraft carrier 1 when applied. The aircraft carrier 1 is a part cut from the aircraft, which is a metal cylindrical cavity structure. The miniaturized ultra-wideband flexible end-fire antenna includes an antenna body 3. The antenna body 3 is fixedly installed on the aircraft carrier 1 and the antenna body 3 is conformal to the aircraft carrier 1. Conformal installation not only saves installation space, but also does not damage the aerodynamic shape of the aircraft. The antenna body 3 can still normally send and receive electromagnetic wave signals, thereby enhancing the structural stability of the antenna body 3.

[0045] In this embodiment, the antenna body 3 adopts a horizontally polarized half-mode Vivaldi antenna, which can achieve a 9-fold frequency ultra-wideband end-fire characteristic at a relatively small cross-sectional height. The antenna body 3 includes a high-temperature resistant flexible substrate 303 as a main body. The high-temperature resistant flexible substrate 303 is a flexible single-sided copper-clad printed circuit board. Specifically, the horizontally polarized half-mode Vivaldi antenna is printed on the high-temperature resistant flexible substrate 303. The antenna body 3 adopts a half-mode structure, which reduces the size of the antenna by half, greatly reduces the lateral size of the antenna, and realizes the miniaturization of the antenna. The antenna body 3 has an extremely low cross-section, and the antenna body 3 is conformally installed with the aircraft carrier 1, which does not affect the aerodynamic performance of the aircraft, and occupies a small installation space.

[0046] More specifically, the high temperature resistant flexible substrate 303 is a high temperature resistant polyimide film flexible material with a dielectric constant of 3.5 and a thickness of 0.05 mm. It can withstand a high temperature not higher than 400°C. In other feasible embodiments, the dielectric constant of the high temperature resistant flexible substrate 303 is set in the range of 3.0 to 4.0, the thickness is set in the range of 0.025 mm to 0.1 mm, the length is selected as 80.5 mm, and the width is selected as 67 mm. The length and width are set according to the platform limitation size. The larger the better. It can be bent arbitrarily to achieve conformal installation with the aircraft carrier 1.

[0047] like Figure 2 As shown, in this embodiment, the side of the high temperature resistant flexible substrate 303 facing away from the aircraft carrier 1 is a copper-clad surface and is etched with a radiation copper-plated layer 301 and a guide copper-plated layer 302 from bottom to top. The area of ​​the radiation copper-plated layer 301 is larger than the area of ​​the guide copper-plated layer 302. The radiation copper-plated layer 301 is the main radiator of the antenna. The antenna body 3 also includes a metal conductor 308, which is fixedly connected to the high temperature resistant flexible substrate 303. The radiation copper-plated layer 301 is the antenna current distribution surface. The side of the radiation copper-plated layer 301 close to the metal conductor 308 is etched in the form of an exponential gradient line, and forms an exponential tapered slot line structure with the metal conductor 308 ( Figure 2 In the middle A part, as the main radiator of the antenna, a plurality of semi-elliptical grooves 304 are etched on the side of the radiation copper plating layer 301 away from the metal conductor 308. The areas of the plurality of semi-elliptical grooves 304 are gradually reduced along the extension direction of the exponential gradient line. The semi-elliptical grooves 304 are used to change the current flow path of the antenna surface. The use of semi-elliptical grooves 304 of different sizes further lengthens the current flow path, which can improve the low-frequency impedance characteristics of the antenna and increase the antenna bandwidth. The plurality of semi-elliptical grooves 304 are evenly arranged on the radiation copper plating layer 301. Preferably, the intervals between two adjacent semi-elliptical grooves 304 can be set to be equal, the length of the elliptical groove line corresponds to 1 / 4 wavelength of the working frequency, and the width of the elliptical groove line is 2mm to 10mm; wherein the guiding copper plating layer 302 can adopt an elliptical structure, which is used to improve the radiation characteristics of the antenna pattern, optimize the splitting trend of the high-frequency pattern, and have a guiding effect on the low-frequency pattern. The ultra-wideband characteristics of the antenna are achieved by etching a series of gaps on the antenna body 3.

[0048] Furthermore, a semicircular short-circuit cavity 305 is etched on the radiation copper plating layer 301 near the starting end of the exponential tapered slot line. Figure 2The middle semicircular short-circuit cavity 305 is located below the starting end of the exponential tapered slot line. The semicircular short-circuit cavity 305 is used to improve the impedance matching of the antenna. A feeding point 306 for feeding the antenna is arranged on one side of the semicircular short-circuit cavity 305 close to the starting end of the exponential tapered slot line. The feeding point 306 is the antenna feeding position, and a feeding coaxial cable can be welded. The end of the exponential tapered slot line of the radiating copper-plated layer 301 and the side of the semicircular short-circuit cavity 305 away from the starting end of the exponential tapered slot line are fixedly connected with a matching resistor 307, which is used to improve the low-frequency impedance matching of the antenna and expand the working bandwidth of the antenna. The resistance value is 100Ω, which optimizes the low-frequency characteristics of the antenna, so that the minimum operating frequency of the antenna is extended to 2GHz, and ultra-wideband characteristics are achieved. In other feasible embodiments, the resistance value of the matching resistor 307 is set in the range of 100Ω to 130Ω.

[0049] Reference Figure 3-6 The electric field distribution diagram of the miniaturized ultra-wideband flexible end-fire antenna for aircraft provided in this embodiment at some frequency points of 2 to 18 GHz is shown. The electric field propagates along the exponential conical slot line, and the setting of the slot line increases and expands the low-frequency working characteristics of the antenna.

[0050] Reference Figure 7 , wherein VSWR is standing wave ratio and Frequency is frequency; the miniaturized ultra-wideband flexible end-fire antenna for aircraft provided in this embodiment has a standing wave ratio of less than 3 in the working frequency band of 2 to 18 GHz, and a standing wave ratio of less than 2.5 in the working frequency band of 5.5 to 18 GHz.

[0051] Reference Figure 7-11 , where Gain pattern is the gain pattern, E-plane is the E plane, H-plane is the H plane, Realized is the gain value, and Azimuth angle is the azimuth angle; the miniaturized ultra-wideband flexible end-fire antenna used for aircraft has good end-fire characteristics in the frequency range of 2 to 18GHz. Due to the resistance loading, the overall gain is low, but it still meets the system requirements. Since the antenna is in a half-mode form, the main lobe of the E plane is asymmetric and deviates from the ground plane by a certain angle; the main lobe of the H plane deviates in the direction away from the aircraft carrier 1 due to the influence of the metal carrier on which the antenna is installed. The E plane and the H plane are the properties of the antenna pattern, referring to the electric field surface and the magnetic field surface, respectively, and the E plane is parallel to the surface of the aircraft carrier 1, and the H plane is perpendicular to the surface of the aircraft carrier 1.

[0052] The miniaturized ultra-wideband flexible end-fire antenna provided in this embodiment has an antenna body 3 that is conformally mounted with the aircraft carrier 1. The antenna body 3 adopts a horizontally polarized working mode and uses an extremely low profile height to achieve end-fire characteristics; the antenna adopts a horizontally polarized half-mode Vivaldi structure, which has the advantages of ultra-wideband and miniaturization, and uses a flexible plate to achieve conformal design, which further reduces the profile height, but at the same time brings about the problem of impedance matching, so the slotting and loading resistance are optimized, and the low-frequency band frequency extension can be up to 0.8GHz, and the frequency is lower, that is, the low-frequency band performance is improved. The antenna body 3 of this application is installed on the aircraft carrier 1, and uses high-temperature resistant materials to improve the environmental adaptability of the antenna.

[0053] The present application also discloses an aircraft, including an aircraft carrier 1 and the above-mentioned miniaturized ultra-wideband flexible end-fire antenna, and also includes a support member 2, and the antenna body 3 is fixedly mounted on the aircraft carrier 1 through the support member 2, and the support member 2 is conformal to the aircraft carrier 1.

[0054] Specifically, the support member 2 is a high temperature resistant foam material, which is an arc-shaped structure as a whole, consistent with the curvature of the aircraft carrier 1, and is installed on the outer surface of the aircraft carrier 1 to conform to it. Preferably, the support member 2 provided in this embodiment is made of polymethacrylimide foam material with a thickness of 8mm, so that the antenna in this embodiment can withstand a high temperature working environment not higher than 200°C. In other feasible embodiments, the thickness of the support member 2 is set in the range of 8mm to 12mm. A fixing hole is opened on the support member 2, which is used to fix itself on the aircraft carrier 1. The aircraft carrier 1 and the support member 2 are fixed with a number of screws. The antenna body 3 is supported by the support member 2. The antenna body 3 is horizontally placed on the surface of the support member 2 to conform to it, and the support member 2 and the antenna body 3 are pasted together with the backing adhesive. The aircraft carrier 1, the support member 2 and the antenna body 3 are coupled into a whole, which can realize the miniaturization of the antenna and the end-fire characteristics of the directional pattern. The high temperature resistant flexible substrate 303 is fixedly connected to the surface of the support member 2 by the backing adhesive. The curvature of the antenna body 3 is free, which is convenient for conforming to the support member 2 and the aircraft carrier 1.

[0055] During specific installation, the back of the polyimide film is pasted on the surface of the support 2 with adhesive. In this application, the cross-sectional height of the antenna and the support 2 is about 8mm, and the height electrical dimension, that is, the wavelength relative to the lowest frequency of use, is only 0.053λL; since the thicker the antenna and the support 2, the better the performance, but it will increase the space occupied by the system, so in order to reduce its overall volume, its thickness is about 8mm, and the performance will deteriorate if it is less than 8mm.

[0056] It should be understood that expressions such as "include" and "may include" used in this application indicate the existence of the disclosed functions, operations or constituent elements, and do not limit one or more additional functions, operations and constituent elements. In this application, terms such as "include" and / or "have" may be interpreted as indicating specific characteristics, numbers, operations, constituent elements, components or combinations thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components or combinations thereof.

[0057] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A miniaturized ultra-wideband flexible end-fire antenna, characterized in that: It comprises an antenna body (3), the antenna body (3) being used for being fixedly mounted on an aircraft carrier (1) and conforming to the aircraft carrier (1), the antenna body (3) adopting a horizontally polarized half-mode Vivaldi antenna and being arranged horizontally.

2. A miniaturized ultra-wideband flexible end-fire antenna as claimed in claim 1, characterized in that: The antenna body (3) comprises a high temperature resistant flexible substrate (303), the side of the high temperature resistant flexible substrate (303) facing away from the aircraft carrier (1) is a copper-clad surface and is etched with a radiation copper plating layer (301) and a guide copper plating layer (302), and the area of ​​the radiation copper plating layer (301) is larger than the area of ​​the guide copper plating layer (302).

3. A miniaturized ultra-wideband flexible end-fire antenna as claimed in claim 2, characterized in that: The antenna body (3) further comprises a metal conductor (308), wherein the metal conductor (308) is fixedly connected to the high temperature resistant flexible substrate (303), and the radiation copper plating layer (301) is the antenna current distribution surface, and the radiation copper plating layer (301) is etched into an exponential gradient line form on one side close to the metal conductor (308), and forms an exponential conical slot line structure with the metal conductor (308), serving as the main radiator of the antenna.

4. A miniaturized ultra-wideband flexible end-fire antenna as claimed in claim 2, characterized in that: A plurality of semi-elliptical grooves (304) are etched on a side of the radiation copper plating layer (301) away from the metal conductor (308), and the areas of the plurality of semi-elliptical grooves (304) decrease gradually along the extension direction of the exponential gradient line.

5. The miniaturized ultra-wideband flexible end-fire antenna according to claim 3, characterized in that: A semicircular short-circuit cavity (305) is etched at the starting end of the exponential tapered slot line of the radiation copper plating layer (301), and a feeding point (306) for feeding the antenna is arranged on one side of the semicircular short-circuit cavity (305) close to the starting end of the exponential tapered slot line.

6. A miniaturized ultra-wideband flexible end-fire antenna as claimed in claim 5, characterized in that: Matching resistors (307) are provided at the end of the exponential tapered slot line of the radiation copper plating layer (301) and at one side of the semicircular short-circuit cavity (305) away from the starting end of the exponential tapered slot line.

7. The miniaturized ultra-wideband flexible end-fire antenna according to claim 2, characterized in that: The lead copper plating layer (302) is an elliptical structure.

8. The miniaturized ultra-wideband flexible end-fire antenna according to claim 2, characterized in that: The high temperature resistant flexible substrate (303) is made of a polyimide film material, with a dielectric constant of 3.0 to 4.0 and a thickness of 0.025 mm to 0.1 mm.

9. An aircraft, characterized in that: It comprises an aircraft carrier (1) and a miniaturized ultra-wideband flexible end-fire antenna as claimed in any one of claims 1 to 8, wherein the miniaturized ultra-wideband flexible end-fire antenna is mounted on the aircraft carrier (1).

10. An aircraft according to claim 9, characterized in that: It also comprises a support member (2), through which the antenna body (3) is fixedly mounted on the aircraft carrier (1), and the support member (2) is conformal to the aircraft carrier (1).

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