Integrated ship communication mast antenna

Abstract

The invention discloses an integrated ship communication mast antenna, belongs to the technical field of communication antennas, and is used for solving the problems of limited space and poorer compatibility, structural stability and stealth performance when a multi-band antenna is integrated on a small ship platform mast. The communication mast antenna comprises a first antenna unit, a second antenna unit, a third antenna unit and a frequency-selective antenna housing, wherein the first antenna unit, the second antenna unit and the third antenna unit are sequentially arranged in the longitudinal direction and are mounted in the frequency-selective antenna housing; the first antenna unit, the second antenna unit and the third antenna unit are all dipole antennas, the central axes of the first antenna unit, the second antenna unit and the third antenna unit coincide, the working frequency bands of the first antenna unit and the third antenna unit are the same, and the second antenna unit at least comprises two working frequency bands. The communication mast antenna is small in occupied space, high in compatibility and invisibility and stable in overall structure.

Description

Technical Field

[0001] This invention belongs to the field of communication antenna technology and relates to an integrated ship communication mast antenna. Background Technology

[0002] The electromagnetic spectrum has become a core resource in the field of modern information technology. Various civilian and military ship platforms increasingly rely on the electromagnetic spectrum to perform tasks such as communication, command, surveillance, and navigation safety. The increasing number of information equipment such as communication, radar, information distribution, and position reporting has led to a growing variety and quantity of equipment and antennas being installed on ships. In particular, a large number of antennas are densely deployed in the limited space of the mast. However, the traditional method of densely deploying various antennas on the mast has resulted in various problems such as spatial conflicts, increased weight, electromagnetic interference, antenna mutual coupling, radiation pattern distortion, increased radar cross section (RCS), and maintenance difficulties.

[0003] Existing technologies for integrated communication mast antenna designs primarily revolve around the structural integration of the antenna and mast, ensuring both communication functionality and structural stability and concealment. The mainstream designs are fully enclosed integrated designs and segmented integrated designs. In fully enclosed integrated designs, the antenna is completely encapsulated inside the mast, appearing externally as a conventional mast. The key to this design is ensuring the antenna functions correctly within the enclosed structure; therefore, transparent or low-dielectric-constant materials are typically used to encapsulate the mast to avoid excessive interference with signal transmission. However, transparent or low-dielectric-constant outer casing materials generally have lower mechanical strength than metals, resulting in weak resistance to wind and ice loads. Changes in dielectric properties after aging further deteriorate standing wave ratios and radiation patterns. In case of internal antenna or feeder failure, the entire mast must be hoisted and disassembled, leading to a large maintenance window, high costs, and difficulty in partial replacement or expansion without network interruption. Segmented integrated designs divide the mast into multiple independent modules, with the antenna installed in a specific module, while other modules provide structural support or auxiliary functions. However, segmented integrated designs suffer from poor stealth performance. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide an integrated ship communication mast antenna to solve the problems of limited space, poor compatibility, structural stability and stealth performance when integrating multi-band antennas on the mast of a small ship platform.

[0005] The objective of this invention is mainly achieved through the following technical solutions.

[0006] This invention provides an integrated ship communication mast antenna, comprising a first antenna unit, a second antenna unit, a third antenna unit, and a frequency-selective radome. The first antenna unit, the second antenna unit, and the third antenna unit are arranged longitudinally and installed inside the frequency-selective radome.

[0007] The first antenna element, the second antenna element, and the third antenna element are all dipole antennas with their central axes coinciding.

[0008] Furthermore, the first antenna unit, the second antenna unit, and the third antenna unit all include a central support assembly, which includes a central tube that forms a through-through wiring channel.

[0009] Furthermore, both the first and third antenna elements are cage-shaped antennas, and the vibrators of the first and third antenna elements are fixed on the central tube.

[0010] Furthermore, both the first and third antenna elements include support columns, with multiple support columns evenly arranged around the central axis on the outer periphery of the vibrator.

[0011] Furthermore, the first antenna element and the third antenna element operate in the same frequency band and at least operate in one VHF band.

[0012] Furthermore, the second antenna unit operates in at least two frequency bands: VHF and UHF.

[0013] Furthermore, it also includes buffer components, which are arranged at both ends of the second antenna unit.

[0014] Furthermore, the buffer assembly includes a buffer ring that can fill the gap between the antenna element and the frequency-selective radome.

[0015] Furthermore, it also includes a base, a third antenna unit and a frequency-selective antenna cover fixedly mounted on the base, and an inspection port at the bottom of the base.

[0016] Furthermore, it also includes lightning rods and mast lights, which are mounted on top of the frequency-selective antenna radome.

[0017] Furthermore, the central support component is connected to the amplifier circuit, and the first antenna unit, the second antenna unit, and the third antenna unit also operate in both low-frequency and high-frequency receiving bands.

[0018] Furthermore, the central support assembly also includes a cable tray, with each end of the cable tray connected to one end of each of the two central tubes.

[0019] Furthermore, the cable tray is a semi-circular structure that protrudes outwards, with multiple cable trays evenly arranged around the center line of the central tube.

[0020] Furthermore, the second antenna unit includes a first resonant barrel and a second resonant barrel, which surround the outer periphery of the central tube of the second antenna unit and are both fixedly connected at one end to the vibrator of the second antenna unit.

[0021] Furthermore, the diameter of the second resonant barrel is larger than the diameter of the first resonant barrel, and the length of the second resonant barrel is smaller than the length of the first resonant barrel.

[0022] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0023] 1. The communication mast antenna of the present invention integrates multiple frequency band communication antennas through the longitudinal coaxial design of the multi-band antennas. This not only reduces the overall size of the antenna system and saves the horizontal installation space requirement, but also solves the problem of mutual obstruction between communication antennas on small ship platforms. It avoids the gain reduction and pattern distortion caused by mutual obstruction of multiple antennas on the same horizontal plane, and ensures horizontal coverage performance.

[0024] 2. The communication mast antenna of the present invention arranges the first antenna unit and the third antenna unit of the same operating frequency band in segments at intervals at the upper and lower ends of the second antenna unit. The coordinated work of the two units solves the coverage limitation of a single antenna unit in this frequency band and avoids the existence of a working blind zone in this frequency band.

[0025] 3. The communication mast antenna of the present invention integrates multiple antenna elements into a frequency-selective radome, effectively improving the stealth performance of the platform and realizing the integrated design of antenna and mast on small ship platforms, adapting to application scenarios with limited space such as ships; by adopting a frequency-selective radome, the electromagnetic stealth effect of the antenna is further optimized.

[0026] 4. The communication mast antenna of the present invention utilizes a central support component to achieve reception functions for both low-frequency and high-frequency bands. It makes full use of the original coaxial integrated framework, does not break through spatial constraints, achieves the effect of accurate dual-band coverage of maritime reception needs, and realizes the goal of miniaturized integration of multi-band antennas.

[0027] 5. The communication mast antenna of the present invention, by uniformly arranging multiple semi-circular cable trays, can not only provide clearance space for the two cones of the vibrator, but also enable the cable to be uniformly arranged in the four quadrants of the horizontal direction within the multiple first cable trays, thereby effectively solving the problem of non-circularity and improving the communication performance of the antenna.

[0028] 6. The communication mast antenna of the present invention, by setting a first resonant barrel with a small diameter long barrel and a second resonant barrel with a large diameter short barrel on the second antenna unit, can effectively reduce the interference between the two frequency band antennas, so that the dual-band VSWR and isolation meet the maritime standards. By adopting a choke structure, dual-band antennas are generated on one antenna structure, avoiding the need to add additional antennas and realizing the frequency band compatibility function of the integrated antenna.

[0029] 7. The communication mast antenna of the present invention, by setting the first antenna unit and the second antenna unit as a cage antenna, can effectively reduce the weight of the antenna while ensuring antenna performance, which is beneficial to the installation of the antenna system and the overall stability of the antenna; at the same time, it can also achieve pattern correction by adjusting the ratio of the upper and lower arms of the vibrator without adding additional complex components, effectively reducing energy coupling, improving the isolation between antennas, and enabling multiple radio devices on small ship platforms to fully exert their maximum performance.

[0030] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the integrated ship communication mast antenna of Embodiment 1 of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the first antenna unit according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of the second antenna unit according to an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the third antenna unit according to an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the electromagnetic models of the first and third antenna elements in Embodiment 2 of the present invention;

[0036] Figure 6 This is a schematic diagram of the electromagnetic model of the second antenna unit in Embodiment 2 of the present invention.

[0037] Figure label:

[0038] 1-First antenna element;

[0039] 11-First oscillator; 12-First central support assembly; 121-First central tube; 122-First cable tray; 123-First central block; 13-First support column; 14-First connecting component; 141-First enclosure; 142-First connecting plate; 143-First cone top connecting assembly; 144-First cone bottom connecting assembly; 145-First central connecting assembly; 1451-First connecting column; 1452-Connecting plate;

[0040] 2-Second day antenna unit;

[0041] 21-Second oscillator; 22-First resonant barrel; 23-Second resonant barrel; 24-Second central support assembly; 241-Second central tube; 242-Second cable tray; 243-Second central block; 25-Second support column; 26-Second connecting component; 261-Connecting column; 262-Connecting seat; 27-Buffer assembly; 271-Buffer ring; 272-Pressure plate;

[0042] 3-Third antenna element;

[0043] 31-Third vibrator; 32-Third center support assembly; 321-Third center tube; 322-Third cable tray; 323-Third center block; 33-Third support column; 34-Third connecting component; 341-Second enclosure; 342-Third enclosure; 343-Second cone top connecting assembly; 344-Second cone bottom connecting assembly; 345-Second center connecting assembly; 346-Mounting assembly;

[0044] 4-Frequency selective antenna radome; 5-Lightning rod; 6-Base; 7-Mast light; 8-Emergency light; 9-Power supply box. Detailed Implementation

[0045] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0046] Example 1

[0047] This embodiment discloses an integrated ship communication mast antenna, such as Figure 1 As shown, it includes a first antenna element 1, a second antenna element 2, a third antenna element 3, and a frequency-selective radome 4. The first antenna element 1, the second antenna element 2, and the third antenna element 3 are installed inside the frequency-selective radome 4. The first antenna element 1, the second antenna element 2, and the third antenna element 3 are arranged sequentially along the longitudinal direction and their central axes coincide.

[0048] like Figure 1As shown, the first antenna unit 1, the second antenna unit 2, and the third antenna unit 3 are installed inside the frequency-selective radome 4. Preferably, the frequency-selective radome 4 is approximately 3.2 meters high and 0.5 meters in diameter. The third antenna unit 3 and the frequency-selective radome 4 are fixedly installed on the base 6. The first antenna unit 1, the second antenna unit 2, and the third antenna unit 3 are arranged longitudinally and connected to each other by bolts. The lightning rod 5 and the mast light 7 are fixed to the top of the frequency-selective radome 4. A power supply box 9 is installed at the bottom of the base 6, and three emergency lights 8 are installed on the side plate of the base 6. The base 6 includes a flange mounting interface and an additional support tube at the bottom, which is inserted into the lower mounting base during installation to enhance the stability of the antenna installation. An inspection port is also added at the bottom to facilitate the maintenance of the internal modules later. The first antenna unit 1, the second antenna unit 2, and the third antenna unit 3 are connected to external radio frequency switching equipment and can be controlled to connect to VHF maritime radio stations, UHF self-organizing network radio stations, and AIS equipment, and can be switched and shared.

[0049] The communication mast antenna in this embodiment integrates multiple frequency band communication antennas through a longitudinal coaxial design. This reduces the overall size of the antenna system, saves lateral installation space, and solves the problem of mutual obstruction between communication antennas on small ship platforms. It avoids gain reduction and pattern distortion caused by mutual obstruction when multiple antennas are on the same horizontal plane, ensuring horizontal coverage performance. Integrating multiple antenna elements within the mast, including the lightning rod 6, effectively improves the platform's stealth performance and achieves an integrated design of antennas and masts on small ship platforms, adapting to space-constrained applications such as ships. Furthermore, the frequency-selective radome 4, made of lightweight composite materials, reduces mast weight and effectively reduces the ship's radar cross-section, while also maintaining stealthy electrical performance, reducing leakage of irrelevant signals, and optimizing electromagnetic stealth effects.

[0050] In some embodiments, both the first antenna element 1 and the third antenna element 3 operate at very high frequency (VHF), preferably between 156MHz and 174MHz. The cage antenna structure designed based on the principle of symmetrical dipoles effectively reduces the antenna weight while ensuring antenna performance, which is beneficial for the installation and overall stability of the antenna system.

[0051] In some embodiments, such as Figure 2 As shown, the first antenna unit 1 includes a first vibrator 11, a first central support assembly 12, a first support column 13, and a first connecting component 14.

[0052] For example, such as Figure 2 As shown, the cage-like structure of the first antenna element 1 includes four pairs of first vibrators 11.

[0053] In order to make full use of limited space, such as Figure 2As shown, the first central support assembly 12 includes a first central tube 121, a first cable tray 122, and a first central block 123. Two sections of the first central tube 121 are arranged along the central axis of the antenna element, and each has a first central block 123 at one of its opposite ends. The first cable tray 122 is an outwardly protruding semi-annular tube, with both ends fixedly connected to the two first central blocks 123 respectively. Four first cable trays 122 are evenly arranged around the central axis of the first central tube 121. The interiors of the two sections of the first central tube 121 and the four first cable trays 122 form a through-channel, providing a routing path for the RF cable and the power line of the upper mast light, as well as providing installation and support for the first vibrator 11. The semi-circular first cable tray 122 protrudes outward to provide clearance for the two cones of the first oscillator 11. The four first cable trays 122 are evenly arranged along the central axis surrounding the first central tube 121, allowing the cable to be evenly distributed in the four horizontal quadrants within the four first cable trays 122, thus effectively solving the non-circularity problem and improving the antenna's communication performance.

[0054] like Figure 2 As shown, multiple pairs of first vibrators 11 are uniformly arranged in a cage shape around the first central tube 121 and fixed on the first central tube 121 by the first connecting component 14; for example, four first support columns 13 are uniformly arranged around the first central tube 121 on the outer periphery of the first vibrators 11 to support the main structure of the first antenna unit 1, so that the central axis of the first antenna unit 1 is kept longitudinally arranged and the resistance of the entire antenna system to external forces is improved.

[0055] For example, such as Figure 2 As shown, the first connecting component 14 includes a first frame 141, a first connecting plate 142, a first cone top connecting assembly 143, a first cone bottom connecting assembly 144, and a first center connecting assembly 145.

[0056] like Figure 2 As shown, both ends of the first support column 13 are fixedly connected to the first frame 141 and the first connecting plate 142 respectively through matching connectors. The ends of the two first central tubes 121 that are far apart from each other are also fixedly connected to the first frame 141 and the first connecting plate 142 respectively through matching connectors. The main structural frame of the first central support assembly 12, the first support column 13, the first frame 141 and the first connecting plate 142 improves the overall structural stability of the first antenna unit 1.

[0057] For example, such as Figure 2 As shown, the first cone-top connecting assembly 143 includes a first fixing ring and a first fixing block. One end of the first oscillator 11 is connected to the first fixing ring through the first fixing block, and the first fixing ring is fixed on the first central tube 121.

[0058] For example, such as Figure 2 As shown, the first conical bottom connecting assembly 144 includes a second fixing ring, a second fixing block, a Haver flange, and a Haver clamp. The other end of the first vibrator 11 is connected to the second fixing ring through the second fixing block, and the second fixing ring is fixed to the first central tube 121 through the Haver flange and the Haver clamp.

[0059] For example, such as Figure 2 As shown, the first central connecting assembly 145 includes a first connecting post 1451 and a connecting plate 1452, both of which are made of epoxy material. The two cones of the first oscillator 11 are connected by a plurality of evenly arranged first connecting posts; the opposite ends of the two arms of the first oscillator 11 are connected by third fixing blocks to the two ends of the connecting plate to enhance the firmness of the first oscillator 11 installation and prevent the first oscillator 11 from shifting under vibration.

[0060] The structure of the third antenna element 3 is similar to that of the first antenna element 1, such as... Figure 4 As shown, it includes a third oscillator 31, a third central support assembly 32, a third support column 33, and a third connecting component 34. The third connecting component 34 includes a second frame 341, a third frame 342, a second cone top connecting assembly 343, a second cone bottom connecting assembly 344, a second central connecting assembly 345, and a mounting assembly 346.

[0061] like Figure 4 As shown, the structures of the third oscillator 31 and the third central support assembly 32 are the same as those of the first oscillator 11 and the first central support assembly 12, respectively. The third central support assembly 32 also includes a third central tube 321, a third cable tray 322, and a third central block 323.

[0062] like Figure 4 As shown, both ends of the third center support assembly 32 and the third support column 33 are fixedly connected to the second frame 341 and the third frame 342 respectively through matching connecting joints; both ends of the mounting assembly 346 are fixedly connected to the third frame 342 and the base 6 respectively, thereby mounting the three antenna elements on the base 6. The structure and function of the second cone top connecting assembly 343, the second cone bottom connecting assembly 344, and the second center connecting assembly 345 are the same as those of the first cone top connecting assembly 143, the first cone bottom connecting assembly 144, and the first center connecting assembly 145.

[0063] Considering the mutual influence between different antenna elements and the differences in installation positions, which can cause the maximum gain of the antenna pattern to deviate from the azimuth plane, the lengths of the upper and lower arms of the first element 11 and the third element 31 in this embodiment are adjustable. The ratio of the two arms can be determined based on simulation and test results. By changing the length of the two arms to control the ratio of the upper and lower arms of the antenna, the offset of the pattern caused by the installation position is compensated, thereby correcting the pattern. This embodiment optimizes the ratio of the upper and lower arms of the elements, eliminating the need for additional complex components. It can achieve pattern correction by adjusting the antenna's own radiation structure, which not only reduces the complexity of the structural design but also ensures the stability of the maximum gain in the azimuth plane while maintaining the miniaturization and integration of the antenna. This improves the signal coverage quality in the horizontal direction and meets the core requirements for horizontal signal transmission in maritime communications. In addition, due to the coaxial installation of the antenna, by adjusting the ratio of the upper and lower arms of the elements, the "zero points" of the antenna radiation patterns of different frequency bands are aligned with "zero points," which can effectively reduce energy coupling, improve the isolation between antennas, and allow multiple radio devices on small ship platforms to fully utilize their maximum performance.

[0064] In some embodiments, the second antenna unit 2 operates in both the VHF and UHF frequency bands, preferably in the ranges of 155MHz to 163MHz and 800MHz to 866MHz. The second antenna unit 2 employs a nested combination structure of large and small barrels to achieve dual-band communication, achieving good frequency band compatibility, reducing inter-band interference, and generating dual-band communication on a single antenna structure through a choke structure, thus avoiding the need for additional antennas.

[0065] Specifically, such as Figure 3 As shown, the second antenna unit 2 includes a second oscillator 21, a first resonant barrel 22, a second resonant barrel 23, a second central support assembly 24, a second support column 25, and a second connecting component 26.

[0066] like Figure 3 As shown, the pairs of second oscillators 21 are arranged opposite each other in the longitudinal direction, with their opposite ends connected by a second connecting component 26, and their other ends fixedly connected to two second resonant barrels 23 respectively.

[0067] like Figure 3As shown, the first resonant barrel 22 and the second resonant barrel 23 are nested structures with a larger barrel inside a smaller barrel. Two pairs of first resonant barrels 22 and second resonant barrels 23 surround the outer periphery of the second central tube 241 with their central axes coinciding. The ends of the first resonant barrels 22 and 23 closest to the second vibrator 21 are welded together. The first resonant barrel 22 is a small-diameter long barrel used for low-frequency (MF) resonance; the second resonant barrel 23 is a larger-diameter short barrel used for high-frequency (HF) resonance. Because the diameters and lengths of the first resonant barrels 22 and 23 differ significantly, interference between the two frequency band antennas can be reduced, ensuring that the dual-band VSWR and isolation meet maritime standards (isolation ≥ 6dB). The choke structure design allows for dual-band operation on a single antenna structure, avoiding the need to increase the number of antennas and achieving compatibility between the two antenna frequency bands.

[0068] like Figure 3 As shown, the second central support assembly 24 is arranged along the central axis of the second antenna unit 2. The structure of the second central support assembly 24 is similar to that of the first central support assembly 12 and the third central support assembly 32, including a second central tube 241, a second cable tray 242 and a second central block 243.

[0069] For example, such as Figure 3 As shown, the two ends of the second support column 25 are respectively connected to the two second resonant barrels 23. Multiple second support columns 25 are evenly arranged around the second central tube 241 to support and position the longitudinal positions of the two opposite ends of the two first resonant barrels 22 and the two second resonant barrels 23.

[0070] For example, such as Figure 3 As shown, the second connecting component 26 includes a connecting post 261 and a connecting seat 262. The connecting post 261 is used to support opposite ends of the symmetrically arranged second vibrator 21. For example, multiple connecting posts 261 are evenly arranged around the second central tube 241, thereby providing uniform support for the second vibrator 21. The two connecting seats 262 are respectively located at both ends of the second antenna unit 2. Both ends of the second central support assembly 24 and the other ends of the two first resonant barrels 22 are fixedly connected to one end of the connecting seat 262. The other ends of the two connecting seats 262 are respectively fixedly connected to the first enclosure 141 and the second enclosure 341, thereby realizing the longitudinal coaxial fixed connection of the first antenna unit 1, the second antenna unit 2, and the third antenna unit 3.

[0071] Considering the vibrations that occur when a ship is sailing, such as Figure 3As shown, the second antenna unit 2 also includes a buffer assembly 27, which is installed at the connection point between every two antenna units. The buffer assembly 27 includes a buffer ring 271 and a pressure plate 272. The buffer ring 271 is fixed to the connecting seat 263 by the pressure plate 272. The buffer ring 271 fills the gap between the antenna unit and the frequency-selective radome, absorbing vibration energy and preventing collision damage between the antenna and the frequency-selective radome in scenarios where the ship vibrates. Optionally, the buffer assembly 27 can also be arranged on the first antenna unit 1 and the third antenna unit 3 respectively.

[0072] The RF connector and feed system used in the mast antenna of this embodiment can be matched and configured using existing technologies as needed. For example, the RF connector uses type N with a power capacity greater than 1 watt in the V / UHF band; the space between the upper and lower arms of the antenna is filled with PTFE with a breakdown voltage greater than 25V, which also meets the power capacity requirements; the feed cable uses ASF141-FEP with a power capacity of 253 watts @ 1GHz, which meets the system requirements.

[0073] Example 2

[0074] The integrated ship communication mast antenna of this embodiment differs from that of Embodiment 1 in that the first antenna unit 1, the second antenna unit 2, and the third antenna unit 3 of this embodiment also operate in both low-frequency and high-frequency receiving bands.

[0075] Specifically, the central support components of the first antenna unit 1, the second antenna unit 2, and the third antenna unit 3 are grounded and internally amplified and power-distributed, respectively connected to the maritime M / HF radio duty port, the NAVTEX alarm receiver, and the weather fax machine. Preferably, the first antenna unit 1, the second antenna unit 2, and the third antenna unit 3 also operate in two receiving frequency bands or points: 518KHz and 2-25MHz.

[0076] In this embodiment, the central support component serves as the radiator for both low-frequency and high-frequency receiving bands. Although it spatially overlaps with the radiators of the original operating frequency bands of the first antenna unit 1, the second antenna unit 2, and the third antenna unit 3, there is physical isolation between the radiators of each frequency band, ensuring the realization of their respective electrical performance. In this embodiment, the central support component serves two purposes: firstly, as the radiator for the two low-frequency receiving bands, enabling maritime communication; and secondly, as the channel for the radio frequency cables of each antenna unit, reducing the impact of the radio frequency cables on the performance of the antenna units.

[0077] In this embodiment, the first antenna unit 1, the second antenna unit 2, and the third antenna unit 3 realize the communication function of four frequency bands / frequency points. Figure 6This is a schematic diagram of the electromagnetic models of the first antenna unit and the third antenna unit in this embodiment, including the electromagnetic models of the M / HF band model 100 and the VHF band model 200. Figure 6 This is a schematic diagram of the electromagnetic model of the second antenna unit 2 in this embodiment, including electromagnetic models of M / HF band model 100, VHF band model 200 and UHF band model 300.

[0078] This embodiment reuses the original coaxial integrated frame of the first antenna unit 1, the second antenna unit 2, and the third antenna unit 3 in its structure. Without breaking the spatial constraints, it realizes the functions of two receiving frequency bands or frequency points, namely low frequency and high frequency, and further realizes the functional requirements of multi-band integrated small mast antenna. In terms of operating frequency band, it avoids mutual interference due to the large distance between it and other antenna units, and the dual frequency band accurately covers the maritime reception requirements.

[0079] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An integrated ship communication mast antenna, characterized in that, It includes a first antenna unit (1), a second antenna unit (2), a third antenna unit (3), and a frequency-selective radome (4). The first antenna unit (1), the second antenna unit (2), and the third antenna unit (3) are arranged in sequence along the longitudinal direction and installed inside the frequency-selective radome (4). The first antenna unit (1), the second antenna unit (2) and the third antenna unit (3) are all dipole antennas and their central axes coincide.

2. The integrated ship communication mast antenna according to claim 1, characterized in that, The first antenna unit (1), the second antenna unit (2) and the third antenna unit (3) all include a central support assembly, which includes a central tube that forms a through-path for wiring.

3. The integrated ship communication mast antenna according to claim 2, characterized in that, Both the first antenna unit (1) and the third antenna unit (3) are cage antennas, and the vibrators of the first antenna unit (1) and the third antenna unit (3) are fixed on the central tube.

4. The integrated ship communication mast antenna according to claim 3, characterized in that, Both the first antenna unit (1) and the third antenna unit (3) include support columns, and multiple support columns are evenly arranged around the central axis on the outer periphery of the vibrator.

5. The integrated ship communication mast antenna according to claim 2, characterized in that, The first antenna unit (1) and the third antenna unit (3) operate in the same frequency band and at least operate in one VHF band.

6. The integrated ship communication mast antenna according to claim 2, characterized in that, The second antenna unit (2) operates in at least two frequency bands: VHF and UHF.

7. The integrated ship communication mast antenna according to any one of claims 1 to 6, characterized in that, It also includes a buffer assembly arranged at both ends of the second antenna unit (2).

8. The integrated ship communication mast antenna according to claim 8, characterized in that, The buffer assembly includes a buffer ring that can fill the gap between the antenna element and the frequency-selective radome (4).

9. The integrated ship communication mast antenna according to any one of claims 1 to 6, characterized in that, It also includes a base (6), on which the third antenna unit (3) and the frequency-selective antenna cover (4) are fixedly installed. The bottom of the base (6) is provided with an inspection port.

10. The integrated ship communication mast antenna according to any one of claims 1 to 6, characterized in that, It also includes a lightning rod (5) and a mast light (7), which are located at the top of the frequency-selective radome (4).

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