An impedance matching feed adapter for shipborne shortwave antennas

Abstract

This invention discloses an impedance matching feed adapter for shipborne shortwave antennas, belonging to the field of shortwave antenna technology. The impedance matching feed adapter includes a support assembly and an impedance matching assembly. The support assembly includes a support base, an insulating shell, an insulating frame, and an insulator. The support base and the insulating shell are detachably connected to form a cavity. The insulating frame is inserted into the cavity, and the insulator is inserted into the support base. The impedance matching assembly includes a core post, an impedance matching coil, and a feed connector. The core post is inserted into the insulator, the impedance matching coil is spirally wound around the outer periphery of the insulating frame, and the feed connector is inserted into the top of the insulating shell. This invention provides an impedance matching feed adapter for shipborne shortwave antennas that integrates insulating support and impedance matching functions, achieving reliable insulating support between the shortwave antenna and the ship's deck while ensuring good impedance matching of the shortwave antenna in the operating frequency band.

Description

Technical Field

[0001] This invention belongs to the field of shortwave antenna technology, specifically relating to an impedance matching feed adapter for shipborne shortwave antennas. Background Technology

[0002] To meet the requirements of ship stealth and electromagnetic compatibility, shipboard equipment is developing towards functional integration, lightweighting, and miniaturization, which has led to a reduction in the physical size of shortwave antennas. Correspondingly, the reduction in the size of shortwave antennas will exacerbate impedance fluctuations and significantly increase the voltage standing wave ratio (VSWR) within the operating frequency band, thereby causing serious reflected power problems.

[0003] Currently, to address the impedance fluctuation issue of shipborne shortwave antennas, an impedance matching box is typically installed at the antenna's feed end. Specifically, an insulating structure and an impedance matching box are arranged on the ship's deck. The insulating structure provides insulation support for the shipborne shortwave antenna, while the impedance matching box achieves impedance matching, thus ensuring good impedance matching and high power capability of the shipborne shortwave antenna in its operating frequency band.

[0004] However, modern surface ship decks often have limited space and are typically equipped with a large number of mechanical devices. Impedance matching boxes are large in size, making their installation highly constrained. Furthermore, the use of insulation structures not only further increases the space occupied but also has poor support reliability, making the aforementioned insulation structures and impedance matching boxes often unsuitable for ship decks. Summary of the Invention

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides an impedance matching feed adapter for shipborne shortwave antennas. Its purpose is to integrate insulation support and impedance matching functions into one unit, thereby achieving reliable insulation support between the shortwave antenna and the ship deck, while occupying a small space and effectively utilizing ship deck space. It also ensures that the shortwave antenna has good impedance matching and high power capability in the operating frequency band, reducing impedance fluctuations of the shipborne shortwave antenna.

[0006] To achieve the above objectives, the present invention provides an impedance matching feed adapter for a shipborne shortwave antenna, the impedance matching feed adapter comprising a support assembly and an impedance matching assembly;

[0007] The support assembly includes a support base, an insulating shell, an insulating frame, and an insulator. The outer edge of the support base is used to rest on the ship deck, and the bottom of the support base is used to insert into a groove on the ship deck for inserting an RF connector. The support base is detachably connected to the insulating shell to form a cavity. The insulating frame is inserted into the cavity, and the insulator is inserted into the support base.

[0008] The impedance matching assembly includes a core post, an impedance matching coil, and a feed connector connected in sequence. The core post is inserted into the insulator, with its top inserted into the cavity and its bottom used to connect to the core wire of the RF connector. The impedance matching coil is spirally wound around the outer periphery of the insulating frame. The feed connector is inserted into the top of the insulating shell, with its bottom inserted into the cavity and its top extending out of the insulating shell. The top of the feed connector is used to mount a shortwave antenna.

[0009] Optionally, the impedance matching assembly further includes a first conductive disk and a second conductive disk arranged in parallel at intervals. The first conductive disk and the second conductive disk are both located on the insulating frame and are respectively connected to both ends of the impedance matching coil. The top of the core column extends out of the insulator and is inserted into the first conductive disk and threadedly connected. The second conductive disk is connected to the bottom of the power supply connector.

[0010] Optionally, the bottom and top of the insulating frame are both provided with bosses, and the first conductive disk and the second conductive disk are both provided with positioning grooves, with each boss inserted into the corresponding positioning groove.

[0011] Optionally, the support assembly further includes an insulating base inserted into the cavity and located below the insulating frame. The insulating base has a mounting groove in which the first conductive disk is inserted.

[0012] Optionally, the support base includes a detachably connected base and a positioning seat. The base is used to rest on the ship's deck and is detachably connected to the insulating shell. The positioning seat is used to insert into a groove on the ship's deck for inserting an RF connector. The positioning seat and the insulating shell form the cavity, and the insulator is inserted into the positioning seat.

[0013] Optionally, the base has a positioning cylinder on the side facing away from the positioning seat, the bottom of the insulating shell is coaxially inserted into the positioning cylinder, and the positioning cylinder is connected to the insulating shell by a first bolt.

[0014] Optionally, a protective cylinder and a connecting flange are coaxially connected in sequence on the side of the positioning seat facing away from the base. The insulator is inserted into the protective cylinder and the connecting flange, and the connecting flange is used to connect the radio frequency connector.

[0015] Optionally, the power supply connector includes a limiting part and a mounting part connected to each other. The limiting part and the mounting part are T-shaped. The limiting part is located in the cavity and is connected to one end of the impedance matching coil. The mounting part extends through the top of the insulating shell. A locking nut is movably sleeved on the mounting part. The mounting part is used to mount a shortwave antenna.

[0016] Optionally, a sealing gasket is fitted onto the mounting portion, and the sealing gasket is sandwiched between the inner wall of the insulating shell and the limiting portion.

[0017] Optionally, the insulating frame is made of polytetrafluoroethylene (PTFE), and the outer peripheral wall of the insulating frame has a helical groove, in which the impedance matching coil is inserted.

[0018] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0019] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include:

[0020] In the impedance matching feed adapter for shipborne shortwave antennas provided in this embodiment of the invention, when applied to a ship, the support base is first placed on the ship's deck, with its bottom inserted into a groove in the deck. The outer edge of the support base provides support for the entire device, while the middle portion is secured in the groove. The support base provides reliable support for the entire device on the deck. Furthermore, the impedance matching component is integrated into the support component, resulting in a compact structure and minimal space occupation. Correspondingly, the core post on the support base can extend precisely into the groove, reliably connecting to the core wire of the RF connector, thereby providing power to the core post.

[0021] Furthermore, since the core, impedance matching coil, and feed connector are connected sequentially, power is ultimately supplied to the feed connector and the shortwave antenna mounted on it. The impedance matching coil is spirally wound around the outer circumference of the insulating frame and located within the cavity. This not only maintains the coil's shape well but also provides sealed protection, ensuring good impedance matching and high power capability for the shortwave antenna in the operating frequency band, effectively reducing impedance fluctuations in shipborne shortwave antennas. Additionally, the insulating shell, insulating frame, and insulators provide insulating support for the feed circuit, preventing short circuits during the feeding process.

[0022] In other words, the impedance matching feed adapter for shipborne shortwave antennas provided by this invention can integrate insulation support and impedance matching functions into one, which can achieve reliable insulation support between the shortwave antenna and the ship deck, and occupy less space, making it suitable for ship deck space. It can also ensure that the shortwave antenna has good impedance matching and high power capability in the operating frequency band, and reduce the impedance fluctuation of the shipborne shortwave antenna. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the impedance matching feed adapter for a shipborne shortwave antenna provided in an embodiment of the present invention;

[0024] Figure 2 This is a cross-sectional view of an impedance matching feed adapter for a shipborne shortwave antenna provided in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram illustrating the use of an impedance matching feed adapter for a shipborne shortwave antenna, as provided in an embodiment of the present invention.

[0026] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0027] 1. Support assembly; 11. Support base; 111. Base; 112. Positioning seat; 113. Positioning cylinder; 114. First bolt; 115. Protective cylinder; 116. Connecting flange; 117. Second bolt; 12. Insulating shell; 13. Insulating frame; 131. Boss; 14. Insulator; 15. Insulating base; 2. Impedance matching assembly; 21. Core column; 22. Impedance matching coil; 23. Power supply connector; 231. Limiting part; 232. Mounting part; 2321. Locking nut; 2322. Sealing gasket; 2323. Washer; 24. First conductive disk; 25. Second conductive disk; 100. Ship deck; 101. Groove; 102. RF connector. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] Example:

[0034] Figure 1 This is a schematic diagram of the impedance matching feed adapter for a shipborne shortwave antenna provided in an embodiment of the present invention. Figure 2 This is a cross-sectional view of an impedance matching feed adapter for a shipborne shortwave antenna provided in an embodiment of the present invention. Figure 3This is a schematic diagram illustrating the use of an impedance matching feed adapter for a shipborne shortwave antenna, provided by an embodiment of the present invention. Figures 1-3 As shown, the impedance matching power adapter includes a support component 1 and an impedance matching component 2.

[0035] The support assembly 1 includes a support base 11, an insulating shell 12, an insulating frame 13, and an insulator 14. The outer edge of the support base 11 is used to rest on the ship deck 100, and the bottom of the support base 11 is used to insert into the groove 101 of the ship deck 100 for inserting the radio frequency connector 102. The support base 11 and the insulating shell 12 are detachably connected to form a cavity. The insulating frame 13 is inserted into the cavity, and the insulator 14 is inserted into the support base 11.

[0036] Impedance matching assembly 2 includes a core post 21, an impedance matching coil 22, and a feed connector 23 connected in sequence. The core post 21 is inserted into the insulator 14, with the top of the core post 21 inserted into the cavity and the bottom of the core post 21 used to connect the core wire of the RF connector 102. The impedance matching coil 22 is spirally wound around the outer periphery of the insulating frame 13. The feed connector 23 is inserted into the top of the insulating shell 12, with the bottom of the feed connector 23 inserted into the cavity and the top of the feed connector 23 extending out of the insulating shell 12. The top of the feed connector 23 is used to mount a shortwave antenna.

[0037] In the embodiment of the present invention, an impedance matching feed adapter for a shipborne shortwave antenna is applied to a ship. First, the support base 11 is placed on the ship's deck 100, with its bottom inserted into a groove 101 in the deck. The outer edge of the support base 11 supports the entire device, while the middle portion is secured in the groove 101. The support base 11 provides reliable support for the entire device on the deck. Furthermore, the impedance matching component 2 is integrated into the support component 1, resulting in a compact structure that occupies minimal space. Correspondingly, the core post 21 on the support base 11 can extend into the groove 101, reliably connecting to the core wire of the RF connector 102, thus providing power to the core post 21.

[0038] Furthermore, since the core 21, impedance matching coil 22, and feed connector 23 are connected in sequence, the feed connector 23 and the shortwave antenna mounted on it are ultimately fed. The impedance matching coil 22 is spirally wound around the outer periphery of the insulating frame 13 and located within the cavity. This not only maintains the shape of the impedance matching coil 22 but also provides a sealed protection, ensuring good impedance matching and high power capability of the shortwave antenna in the operating frequency band, effectively reducing impedance fluctuations in the shipborne shortwave antenna. Additionally, the insulating support provided by the insulating shell 12, insulating frame 13, and insulator 14 provides insulation protection for the feed circuit, preventing short circuits during the feeding process.

[0039] In other words, the impedance matching feed adapter for shipborne shortwave antennas provided by this invention can integrate insulation support and impedance matching functions into one, which can achieve reliable insulation support between the shortwave antenna and the ship deck 100, and occupy less space, which can be effectively used in the space of the ship deck 100. It can also ensure that the shortwave antenna has good impedance matching and high power capability in the operating frequency band, and reduce the impedance fluctuation of the shipborne shortwave antenna.

[0040] For example, the core post 21 is made of silver-plated copper with good conductivity. The core post 21 is 100mm long and 14mm in outer diameter. The lower 30mm of the core post 21 has a hollow structure to facilitate connection with the core wire of the RF connector 102.

[0041] For example, the insulating shell 12 is made of modified epoxy fiberglass and has an internal hollow cylindrical cavity structure with good insulation performance, providing support and housing space for the insulating frame 13 and the impedance matching coil 22. In addition, the impedance matching coil 22 is made of a low resistivity metal conductor to reduce losses and carry large currents.

[0042] In this embodiment, the insulating frame 13 can be made of polytetrafluoroethylene (PTFE), and the outer peripheral wall of the insulating frame 13 has a spiral groove, in which the impedance matching coil 22 is inserted. PTFE has high structural strength, and the spiral groove allows for precise positioning of the impedance matching coil 22.

[0043] See also Figure 2 The impedance matching assembly 2 also includes a first conductive disk 24 and a second conductive disk 25 arranged in parallel. The first conductive disk 24 and the second conductive disk 25 are both located on the insulating frame 13 and are respectively connected to the two ends of the impedance matching coil 22. The top of the core column 21 extends out of the insulator 14 and is inserted into the first conductive disk 24 and threadedly connected. The second conductive disk 25 is connected to the bottom of the power supply connector 23.

[0044] In the above embodiments, the conductive disks (first conductive disk 24 and second conductive disk 25) have a stable structure and a large area. By setting the conductive disks with transition connections, a reliable connection with the impedance matching coil 22 can be achieved. That is, not only can a reliable connection between the core 21 and the impedance matching coil 22 be guaranteed, but also a reliable connection between the impedance matching coil 22 and the power supply connector 23 can be guaranteed, thereby ensuring that the power supply circuit is more reliable.

[0045] For example, the upper 20mm of the core rod has an external thread. Both the first conductive disk 24 and the second conductive disk 25 are made of beryllium bronze, which has good conductivity and elasticity.

[0046] Furthermore, the bottom and top of the insulating frame 13 both have bosses 131, and the first conductive disk 24 and the second conductive disk 25 both have positioning grooves, with each boss 131 inserted into the corresponding positioning groove.

[0047] It is easy to understand that the engagement of the boss 131 and the positioning groove facilitates the installation of the conductive disk on the insulating frame 13, ensuring the reliability of the conductive disk installation. Furthermore, before inserting the insulating frame 13 into the cavity, the aforementioned engagement allows for the convenient pre-assembly of the insulating frame 13, the impedance matching coil 22, the first conductive disk 24, and the second conductive disk 25, forming a single unit. This allows for subsequent insertion into the cavity, improving assembly efficiency and ensuring the reliable connection of the impedance matching coil 22 through pre-assembly.

[0048] In addition, the support assembly 1 also includes an insulating base 15, which is inserted into the cavity and located below the insulating frame 13. The insulating base 15 has a mounting groove, in which the first conductive disk 24 is inserted. The insulating base 15 provides support and positioning for the first conductive disk 24, thereby achieving support and positioning for the insulating frame 13, the impedance matching coil 22, and the second conductive disk 25. This avoids the problem of stress concentration caused by relying solely on the threaded connection between the core post 21 and the first conductive disk 24.

[0049] For example, the insulating base 15 and the insulating frame 13 have the same diameter and are made of the same material.

[0050] In one implementation of the present invention, the support base 11 includes a detachably connected base 111 and a positioning seat 112. The base 111 is used to rest on the ship deck 100. The base 111 is detachably connected to the insulating shell 12. The positioning seat 112 is used to be inserted into the groove 101 of the ship deck 100 for inserting the radio frequency connector 102. The positioning seat 112 and the insulating shell 12 form a cavity. The insulator 14 is inserted into the positioning seat 112.

[0051] In the above embodiment, the base 111 serves to support the entire device and connect to the insulating shell 12, while the positioning seat 112 serves to position the entire device and connect to the base 111. This modular design not only reduces the processing difficulty (compared to directly processing the support base 11), but also avoids the problem of concentrated stress. Furthermore, when the base 111 or the positioning seat 112 is damaged, it can be replaced individually without affecting other structural components.

[0052] For example, the bottom surface of the insulating shell 12 abuts against the positioning seat 112, and a sealing ring is also sandwiched between the insulating shell 12 and the positioning seat 112.

[0053] Furthermore, the base 111 has a positioning cylinder 113 on the side facing away from the positioning seat 112. The bottom of the insulating shell 12 is coaxially inserted into the positioning cylinder 113, and the positioning cylinder 113 is connected to the insulating shell 12 by a first bolt 114. The positioning cylinder 113 serves to position the insulating shell 12, and the first bolt 114 increases the installation stability of the insulating shell 12.

[0054] For example, the base 111 and the positioning cylinder 113 are integrally formed and made of corrosion-resistant stainless steel 316L, forming an integral inverted L-shaped structure. The base 111 has four mounting holes, which are used to connect the positioning seat 112 to the base 112 via a second bolt 117. In addition, matching anti-detachment steps are provided between the inner wall of the positioning cylinder 113 and the outer wall of the insulating shell 12.

[0055] It should be noted that after the support component 1 and the impedance matching component 2 are assembled, glue needs to be applied to the connection between the positioning cylinder 113 and the insulating shell 12 to prevent moisture from entering and to ensure insulation performance.

[0056] Additionally, a protective cylinder 115 and a connecting flange 116 are coaxially connected to the side of the positioning seat 112 facing away from the base 111. The insulator 14 is inserted into the protective cylinder 115 and the connecting flange 116, which is used to connect the RF connector 102. The protective cylinder 115 extends into the groove 101, providing protection for the insulator 14 and the core post 21, while the connecting flange 116 connects the RF connector 102, ensuring reliable conductivity between the core wire of the RF connector 102 and the core post 21.

[0057] For example, the positioning seat 112, the protective cylinder 115, and the connecting flange 116 are integrally formed and made of 316L stainless steel, which is resistant to marine corrosion environments. In addition, a rubber sealing ring is provided on the bottom surface of the connecting flange 116, which is sandwiched between the connecting flange 116 and the RF connector 102 to ensure a seal between the two.

[0058] For example, the positioning seat 112, protective cylinder 115, and connecting flange 116 are integrally formed as a hollow metal cylindrical structure with an internal diameter of 24 mm. Furthermore, the hollow metal cylindrical structure, insulator 14, and core post 21 adopt a coaxial nested concentric circle design, that is, the innermost layer is the core post 21, which tightly wraps around the insulator 14, and the outermost layer is the hollow metal cylindrical structure. To ensure axial sliding between the three components, matching anti-detachment steps are provided on the corresponding inner and outer walls of the protective cylinder 115 and the insulator 14, and between the insulator 14 and the core post 21.

[0059] In this embodiment, the power supply connector 23 includes a limiting part 231 and a mounting part 232 that are connected to each other. The limiting part 231 and the mounting part 232 are T-shaped. The limiting part 231 is located in the cavity and is connected to one end of the impedance matching coil 22. The mounting part 232 passes through the top of the insulating shell 12. A locking nut 2321 is movably sleeved on the mounting part 232. The mounting part 232 is used to mount a shortwave antenna.

[0060] In the above embodiment, the feed connector 23 can be locked onto the insulating shell 12 by the inner and outer cooperation of the limiting part 231 and the locking nut 2321, preventing it from moving. At the same time, the limiting part 231 also serves to connect the impedance matching coil 22 and prevent the bottom end of the feed connector 23 from detaching from the cavity, while the mounting part 232 serves to support the shortwave antenna.

[0061] For example, a washer 2323 is sandwiched between the locking nut 2321 and the insulating housing 12. The limiting part 231 is connected to the second conductive disk 25.

[0062] Furthermore, a sealing gasket 2322 is fitted onto the mounting part 232, and the sealing gasket 2322 is sandwiched between the inner wall of the insulating shell 12 and the limiting part 231. Under the locking action of the locking nut 2321, the sealing gasket 2322 can be tightly clamped, which plays a role in sealing and waterproofing the gap between the power supply connector 23 and the insulating shell 12.

[0063] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An impedance matching feed adapter for a shipborne shortwave antenna, characterized in that, The impedance matching power adapter includes a support component and an impedance matching component; The support assembly includes a support base, an insulating shell, an insulating frame, and an insulator. The outer edge of the support base is used to rest on the ship deck, and the bottom of the support base is used to insert into a groove on the ship deck for inserting an RF connector. The support base is detachably connected to the insulating shell to form a cavity. The insulating frame is inserted into the cavity, and the insulator is inserted into the support base. The impedance matching assembly includes a core post, an impedance matching coil, and a feed connector connected in sequence. The core post is inserted into the insulator, with its top inserted into the cavity and its bottom used to connect to the core wire of the RF connector. The impedance matching coil is spirally wound around the outer periphery of the insulating frame and is used to reduce the impedance fluctuation of the shipborne shortwave antenna. The feed connector is inserted into the top of the insulating shell, with its bottom inserted into the cavity and its top extending out of the insulating shell. The top of the feed connector is used to mount the shortwave antenna.

2. The impedance matching feed adapter for a shipborne shortwave antenna according to claim 1, characterized in that, The impedance matching assembly further includes a first conductive disk and a second conductive disk arranged in parallel at intervals. The first conductive disk and the second conductive disk are both located on the insulating frame and are respectively connected to both ends of the impedance matching coil. The top of the core column extends out of the insulator and is inserted into the first conductive disk and threadedly connected. The second conductive disk is connected to the bottom of the power supply connector.

3. An impedance matching feed adapter for a shipborne shortwave antenna according to claim 2, characterized in that, The bottom and top of the insulating frame are both provided with bosses, and the first conductive disk and the second conductive disk are both provided with positioning grooves, with each boss inserted into the corresponding positioning groove.

4. An impedance matching feed adapter for a shipborne shortwave antenna according to claim 3, characterized in that, The support assembly also includes an insulating base, which is inserted into the cavity and located below the insulating frame. The insulating base has a mounting groove, in which the first conductive disk is inserted.

5. An impedance matching feed adapter for a shipborne shortwave antenna according to claim 1, characterized in that, The support base includes a detachably connected base and a positioning seat. The base is used to rest on the ship deck and is detachably connected to the insulating shell. The positioning seat is used to insert into a groove on the ship deck for inserting an RF connector. The positioning seat and the insulating shell form the cavity, and the insulator is inserted into the positioning seat.

6. An impedance matching feed adapter for a shipborne shortwave antenna according to claim 5, characterized in that, The base has a positioning cylinder on the side opposite to the positioning seat, the bottom of the insulating shell is coaxially inserted into the positioning cylinder, and the positioning cylinder is connected to the insulating shell by a first bolt.

7. An impedance matching feed adapter for a shipborne shortwave antenna according to claim 5, characterized in that, The positioning seat is coaxially connected to a protective cylinder and a connecting flange on the side opposite to the base. The insulator is inserted into the protective cylinder and the connecting flange. The connecting flange is used to connect the radio frequency connector.

8. An impedance matching feed adapter for a shipborne shortwave antenna according to any one of claims 1-7, characterized in that, The power supply connector includes a limiting part and a mounting part that are connected to each other. The limiting part and the mounting part are T-shaped. The limiting part is located in the cavity and is connected to one end of the impedance matching coil. The mounting part passes through the top of the insulating shell. A locking nut is movably sleeved on the mounting part. The mounting part is used to mount a shortwave antenna.

9. An impedance matching feed adapter for a shipborne shortwave antenna according to claim 8, characterized in that, A sealing gasket is fitted onto the mounting part, and the sealing gasket is sandwiched between the inner wall of the insulating shell and the limiting part.

10. An impedance matching feed adapter for a shipborne shortwave antenna according to any one of claims 1-7, characterized in that, The insulating frame is made of polytetrafluoroethylene, and the outer peripheral wall of the insulating frame has a spiral groove, in which the impedance matching coil is inserted.

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