Submarine satellite antenna radome with high water pressure resistance

Abstract

Disclosed is a satellite antenna radome for submarines capable of withstanding a predetermined water pressure or more while increasing radio wave transmittance.SOLUTION: According to an aspect of the present invention, there is provided a submarine satellite antenna radome including a dome-shaped cap having an opened inside, a cylindrical cap bracket installed to be screw-fixed to the cap and having opened upper and lower sides to communicate with the inside of the cap, and a cylindrical body made of a molybdenum-added stainless alloy, installed to be screw-fixed to the cap bracket, and having only an opened upper side.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a submarine satellite antenna radome. [Background technology]

[0002] Generally, radome is a combination of the words radar and dome. Radar is a device that uses a fixed or rotating (scanning) parabolic antenna to emit and capture high-frequency directional radio waves into space and detect aircraft, obstacles, or other targets.

[0003] Such radomes consist of a cap, cap bracket, and body to protect against external environmental conditions such as wind, rain, salt, and humidity, as well as physical impacts. They are generally made entirely of plastic, and much research has been conducted to improve their durability, airtightness, and sealing power.

[0004] Conventional radomes used in satellite antennas have a water pressure resistance of around 45 bar, which can cause the hull to break when a submarine dives to its maximum operating depth of 700m. As the thickness increases to withstand water pressure, radio wave transmittance decreases. In other words, a radome for a submarine must achieve water pressure resistance that is proportional to its thickness and transmittance that is inversely proportional to its thickness. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Korean Patent Registration No. 10-2462750 Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, the present invention has been made to solve the above-mentioned problems, and provides a submarine satellite antenna radome that can withstand water pressure of 70 bar or more while increasing radio wave transmittance.

[0007] Other objects of the present invention will become more apparent from the following preferred embodiments. [Means for solving the problem]

[0008] According to one aspect of the present invention, there is provided a submarine satellite antenna radome including: a dome-shaped cap having an opening at the inside; a cylindrical cap bracket that is screwed to the cap and has openings at the top and bottom to communicate with the inside of the cap; and a cylindrical body made of a molybdenum-added stainless steel alloy that is screwed to the cap bracket and has an opening only at the top.

[0009] wherein the cap is made of FRP, The cap bracket may be made of a stainless steel alloy.

[0010] Also, the cap may be formed to be thicker than the body.

[0011] In addition, a quartz material may be laminated on the exterior or interior of the body, and may be laminated to a thickness of 0.01 to 0.1 mm.

[0012] Also, The quartz material can be laminated in a band-shaped pattern spaced apart at regular intervals, laminated on both the inside and outside, and laminated without overlapping at a predetermined interval, or it can be laminated a second time to create a net-like shape only on the outside.

[0013] Here, the quartz material may be laminated three times to have a honeycomb structure inside.

[0014] Other aspects, features, and advantages beyond those described above will be apparent from the following drawings, claims, and detailed description of the invention. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a submarine satellite antenna radome that can withstand a water pressure of 70 bar or more while increasing radio wave transmittance. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is an overall view showing a submarine satellite antenna radome according to one embodiment of the present invention; [Figure 2] 1 is an exemplary view showing the appearance of a radome in which quartz is laminated in the form of a strip according to one embodiment of the present invention; [Figure 3] 1 is an exemplary view showing the appearance of a radome in which quartz is laminated in the form of a strip according to one embodiment of the present invention; [Figure 4] 10 is an exemplary view showing the appearance of a radome in which quartz is layered in a mesh shape according to another embodiment of the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0017] Since the present invention can be modified in various ways and has many embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description, but it should be understood that this is not intended to limit the present invention to the specific embodiments, but rather to include all modifications, equivalents, and alternatives that fall within the spirit and scope of the present invention.

[0018] When a component is said to be "coupled" or "connected" to another component, it should be understood that it may be directly coupled or connected to the other component, but that there may be other components in between. On the other hand, when a component is said to be "directly coupled" or "directly connected" to another component, it should be understood that there are no other components in between.

[0019] Terms such as "first" and "second" can be used to describe various elements, but the elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, terms such as "first critical value" and "second critical value" described below can be used to designate critical values ​​that are substantially different or partially the same, but since there is a risk of confusion when they are expressed using the same word "critical value," the terms "first" and "second" are used together for the sake of distinction.

[0020] The terms used in this specification are merely used to describe specific embodiments and are not intended to limit the present invention. The singular expressions include the plural unless the context clearly dictates otherwise. In this specification, the terms "comprise" or "have" specify the presence of a feature, value, step, operation, component, part, or combination thereof described in the specification, and should be understood not to preclude the possibility of the presence or addition of one or more other features, value, step, operation, component, part, or combination thereof. Furthermore, the components of the embodiments described with reference to each drawing are not limited to being applied only to the embodiment in question, but may be embodied to be included in other embodiments within the scope of maintaining the technical concept of the present invention, and even if separate description is omitted, multiple embodiments may be embodied again as a single integrated embodiment. Furthermore, when describing the present invention with reference to the accompanying drawings, the same or related reference numerals will be used for the same components regardless of the reference numerals in the drawings, and redundant descriptions thereof will be omitted. In describing the present invention, if it is determined that a detailed description of related publicly known technology may unnecessarily obscure the gist of the present invention, such a detailed description will be omitted.

[0021] FIG. 1 is an overall view showing a submarine satellite antenna radome according to one embodiment of the present invention.

[0022] Referring to FIG. 1, the submarine satellite antenna radome includes a cap 10, a cap bracket 20, and a fuselage 30.

[0023] First, to give an overview of the satellite antenna system, the satellite antenna system tracks satellites through signal verification and stabilization functions, and the antenna control device installed on the ship transmits navigation and satellite inertial information to the satellite antenna. Users can access the modem to receive emergency situations, rescue requests, and broadcasts, or use it for telephone or internet communications.

[0024] A satellite antenna system includes a radome, antenna, pedestal control unit (PCU), inertial measurement unit (IMU), multi-RF unit (MRU), and pedestal. The radome can be divided into an upper radome and a lower radome. The upper radome protects the equipment from elements of the marine environment, while the lower radome protects the equipment from elements of the marine environment and is fixed to the pedestal and hull. The antenna, which is typically a dish-shaped parabolic antenna, is a structure that collects and transmits satellite signals. The PCU (Pedestal Control Unit) searches for and tracks the antenna, the IMU (Inertial Measurement Unit) verifies inertial information, and the MRU (Multi-RF Unit) processes analog and digital satellite received signals. The pedestal is a mechanical structure that supports the antenna and can move each axis in the desired direction.

[0025] In other words, the radome is a device that protects the antenna equipment from corrosion and electronic equipment failure due to the marine environment, seawater, wind, and salt, and is divided into upper and lower parts (cap 10 and fuselage 30) for antenna installation and maintenance. The cap 10 must be manufactured to optimize the loss for transmission between the antenna and the satellite.

[0026] Cap 10 is a dome-shaped device with an open interior, made of FRP (fiber-reinforced plastic) material and equipped with an insert on the inner periphery. In other words, Cap 10 is made of FRP material, which has excellent radar reflection wave capturing power and an increased effective range. FRP (fiber-reinforced plastic) is a material that boasts strong durability and excellent workability, and is lightweight yet strong, corrosion-resistant, and has a long lifespan.

[0027] The cap bracket 20 is cylindrical with open top and bottom openings that connect to the inside of the cap, and has a threaded portion that corresponds to the insert of the cap 10, so that it is screwed onto the cap. For example, the cap bracket 20 is preferably made of a metal material (such as a stainless steel alloy) to increase its durability against bottom water pressure. Meanwhile, the cap bracket corresponding to the cap has a sealed structure in which a cap bracket O-ring or the like is further installed with the threaded portion between them.

[0028] At this time, it is preferable that the threaded portion 21 of the cap bracket 20, which is screwed to the cap 10, is sealed with silicone. The inner circumferential surface of the cap bracket 20 has a threaded line (not shown) formed thereon, and is screwed to the body 30.

[0029] The body 30 is made of a metal material for greater durability, has a cylindrical shape with only the top open, and has an internal space that can be accommodated, and this space is structured to communicate with the inside of the cap bracket 20 and the cap 10. In one example, the body 30 is made of a molybdenum-added stainless steel alloy (STS-316), and the cap bracket 20 can also be formed of the same alloy. In one example, the cap 10 is made of an FRP material, and can be formed thicker than the body 30 for increased durability.

[0030] A thread (not shown) is formed on one end of the outer periphery of the body 30, and is configured to be screwed onto the thread (not shown) of the cap bracket 20. Similarly, it is preferable that a body O-ring is further installed on the body 30 corresponding to the cap bracket 20 to provide a tight seal.

[0031] Such radomes are designed to provide protection against impact, water, and dust, and are designed with water pressure resistance, water resistance, and airtightness in mind, taking into account the special operating environment of a submarine. After 3D modeling, structural analysis tools (ANSYS) are used to verify the maximum stress and maximum displacement, analyze the structural stability rate, and confirm the vibration natural frequency to ensure earthquake resistance and resonance avoidance design. It is desirable to manufacture them through iterative performance improvements until they meet US military standards, minimizing the risk of equipment damage.

[0032] 2 and 3 are exemplary views showing the appearance of a radome body in which quartz is laminated in a strip shape according to one embodiment of the present invention, and FIG. 4 is an exemplary view showing the appearance of a radome body in which quartz is laminated in a mesh shape according to another embodiment of the present invention.

[0033] Referring to FIGS. 2 and 3, the exterior of the body 30 is laminated with a Quartz 200 material.

[0034] Quartz 200, or quartz glass, is commonly used in semiconductors and is widely used in quartzware that protects and transports semiconductor wafers during various processes such as etching, deposition, and ion implantation, as well as in components such as focus rings and masks. Quartz is a highly chemical- and corrosion-resistant material that is laminated onto the radome body 30 and is able to exhibit high durability (water pressure resistance of over 70 bar) despite its relatively thin thickness.

[0035] The quartz 200 may be laminated to a thickness of 0.1 to 1 mm, or may be laminated in a 45 / -45 pattern, a 0 / 90 pattern, or the like. Of course, this is not limiting. The quartz 200 may be laminated over the entire exterior of the body 30, or in another example, the quartz 200 may be laminated in a strip-like pattern at regular intervals, as shown in the drawing.

[0036] Furthermore, as shown in the drawing, quartz 300 is also stacked inside, and the inner and outer quartz 200, 300 are stacked at a predetermined interval without overlapping, thereby minimizing the decrease in the radar reflected wave capturing power. In other words, the quartz 200, 300 stacked inside and outside do not overlap each other and are spaced apart at a predetermined interval, so that there are areas where the quartz 200, 300 are not stacked, thereby reducing the decrease in the radar reflected wave capturing power.

[0037] 4, quartz 400 can be laminated in a mesh shape only on the exterior, with quartz 200 laminated in vertical and horizontal strips only on the exterior to prevent damage from strong external forces.

[0038] According to another embodiment of the present invention, the quartz may be three-layered to have a honeycomb shape inside. The honeycomb shape can easily withstand strong pressure applied from the outside, and unlike vertical and horizontal strips, it can distribute stress within the structure, preventing the radome from breaking inward.

[0039] While the present invention has been described above with reference to preferred embodiments, it will be understood by those skilled in the art that various modifications and variations can be made thereto without departing from the spirit and scope of the present invention as set forth in the following claims. [Explanation of symbols]

[0040] 10 Cap 20 Cap bracket 30 Torso 200, 300, 400 quartz

Claims

1. A dome-shaped cap with an opening inside, a cylindrical cap bracket that is screw-fixed to the cap and has openings at the top and bottom to communicate with the interior of the cap; and a cylindrical body made of a molybdenum-added stainless steel alloy, the body being fixed to the cap bracket by a screw method, and only the top surface being open.

2. The cap is made of FRP, 2. The submarine satellite antenna radome according to claim 1, wherein said cap bracket is made of a stainless steel alloy.

3. 3. The submarine satellite antenna radome according to claim 2, wherein said cap is formed to be thicker than said fuselage.

4. 4. The submarine satellite antenna radome according to claim 3, wherein a quartz material is laminated on the exterior or interior of said body.

5. 5. The submarine satellite antenna radome according to claim 4, wherein the quartz material is laminated to a thickness of 0.01 to 0.1 mm.

6. 6. The submarine satellite antenna radome of claim 5, wherein the quartz material is layered in a pattern of regularly spaced bands.

7. 7. The submarine satellite antenna radome according to claim 6, wherein the quartz materials are laminated on both the inside and outside of the radome, with a predetermined gap between them so that they do not overlap.

8. 8. The submarine satellite antenna radome according to claim 7, wherein the quartz material is secondarily laminated to have a mesh shape only on the outside.

9. 9. The submarine satellite antenna radome according to claim 8, wherein the quartz material is laminated three times to have a honeycomb pattern inside.

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