An inflatable antenna for marine rescue

Abstract

This application belongs to the field of antenna technology and relates to an inflatable antenna for maritime rescue, comprising: a base component, a radiating component, and a feeding component; the base component is a rotating body structure, with an axial air gap provided at the center of the rotating body structure, forming a cylindrical structure; the cylindrical structure has a closed cavity inside, which is filled with gas to form an inflatable antenna for maritime rescue; the radiating component is provided on the side of the base component to radiate antenna signals; and the feeding component is connected to the radiating component. The application can improve the efficiency and success rate of maritime rescue.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to an inflatable antenna for marine rescue. Background Art

[0002] Antennas, as core components of wireless communication systems, play a crucial role in converting electromagnetic wave energy into electrical signals and vice versa, serving as the bridge for wireless information transmission. They not only determine the efficiency of signal radiation and reception but also directly impact the distance, speed, and quality of communication.

[0003] With the rapid development of science and technology, antenna technology has been continuously innovating, which not only meets the growing demand for communications, but also promotes progress in many fields such as broadcasting, television, satellite communications, radar navigation, etc. Especially in recent years, antennas have begun to play an important role in maritime rescue.

[0004] In the prior art, the lifebuoy and antenna used in marine rescue are often designed separately.

[0005] However, the non-integrated design will cause certain problems with the transmission signal, resulting in reduced efficiency and success rate of maritime rescue. Summary of the Invention

[0006] Based on this, it is necessary to provide an inflatable antenna for maritime rescue to address the above technical problems, which can integrate the antenna and lifebuoy into an integrated design to improve the efficiency and success rate of maritime rescue.

[0007] An inflatable antenna for marine rescue, comprising: a base component, a radiation component, and a feeding component;

[0008] The base component is a rotating body structure, and an axial air gap is provided at the center of the rotating body structure, so that the base component forms a cylindrical structure; a closed cavity is provided inside the cylindrical structure to be filled with gas to form a marine rescue inflatable antenna;

[0009] The radiation component is provided on a side surface of the base component to radiate antenna signals;

[0010] The feeding component is connected to the radiating component.

[0011] In one embodiment, the base member comprises: a first portion, a second portion, and a third portion connected in sequence;

[0012] The first part, the second part and the third part are all hollow annular structures, and the inner cavities are interconnected; the first part, the second part and the third part have the same inner diameter and different outer diameters.

[0013] In one embodiment, the outer diameters of the first portion, the third portion, and the second portion increase sequentially.

[0014] In one embodiment, the radiation component includes: a first strip, a second strip, and a third strip in an annular shape;

[0015] The first strip is sleeved on a side surface of the first portion, the second strip is sleeved on a side surface of the second portion, and the third strip is sleeved on a side surface of the third portion.

[0016] In one embodiment, the first strip is provided with radiating slots arranged in a circumferential array.

[0017] In one embodiment, the number of the first strips is two, the two first strips are spaced apart and sleeved on the side surface of the first portion, and a gap is provided between the first strips and the second portion.

[0018] In one embodiment, the width of the second strip is equal to the height of the second portion.

[0019] In one embodiment, a width of the third strip is smaller than a height of the third portion, and a gap is formed between the third strip and the second portion.

[0020] In one embodiment, the feeding component is connected to the second strip.

[0021] In one embodiment, the base member is a membrane structure.

[0022] The above-mentioned inflatable marine rescue antenna is designed with a base component, a radiating component, and a feeding component. The antenna is integrated into a flexible film and the entire antenna is used as a swimming ring or life ring (especially an arm swimming ring or arm life ring). It can transmit and / or receive signals while providing buoyancy, transmit rescue information, and realize communication of the swimming ring or life ring. At the same time, the antenna bandwidth is expanded. Compared with other narrowband antennas, the antenna of the present application has a wider frequency band, can transmit and receive more signals, and improve antenna utilization. In addition, the antenna has high gain characteristics and excellent gain stability, has good radiation performance in the entire frequency band, can receive long-distance signals, and has a wide coverage range. It can achieve precise positioning of the wearer, improve the accuracy of marine positioning and the efficiency of marine rescue, improve the safety factor, and play a significant role in ensuring human safety. In addition, the inflatable antenna is made of a relatively thin material and can be inflated and deflated. It can operate normally in the inflated state, effectively reducing weight and being easy to integrate. In the uninflated state, it can be collapsed and folded, greatly reducing the volume and storage space of the antenna, making it easy to store and carry, convenient for transportation, and increasing the flexibility of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional schematic diagram of an inflatable antenna for marine rescue in one embodiment;

[0024] Figure 2 A perspective view of an inflatable antenna for marine rescue according to an embodiment;

[0025] Figure 3 A top view of an inflatable antenna for marine rescue according to an embodiment;

[0026] Figure 4 A dimensional diagram of an inflatable antenna for marine rescue in one embodiment;

[0027] Figure 5 S is an inflatable antenna for marine rescue in one embodiment. 11 Schematic diagram of the curve;

[0028] Figure 6 A schematic diagram of an input impedance curve of an inflatable antenna for marine rescue in one embodiment;

[0029] Figure 7 A schematic diagram of a gain curve of an inflatable antenna for marine rescue in one embodiment;

[0030] Figure 8 is a planar radiation pattern of an inflatable antenna for marine rescue at 3.5 GHz in one embodiment;

[0031] Figure 9 4 GHz is a planar radiation pattern of an inflatable antenna for marine rescue in one embodiment;

[0032] Figure 10 FIG1 is a planar radiation pattern of an inflatable antenna for marine rescue at 4.5 GHz in one embodiment.

[0033] Reference numerals:

[0034] Base member 1, first portion 11, second portion 12, third portion 13, air gap 14;

[0035] Radiating component 2, first strip 21, second strip 22, third strip 23, radiating slot 24;

[0036] Power feeding component 3. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for explaining this application and are not intended to limit this application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in this application without creative work are within the scope of protection of this application.

[0038] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, the terms "first," "second," and so on, used in this application are for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "multiple groups" means at least two groups, such as two groups, three groups, and so on, unless otherwise specifically defined.

[0040] In this application, unless otherwise specified or limited, the terms "connect," "fix," etc. should be understood in a broad sense. For example, "fix" can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two elements or an interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0041] In addition, the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0042] This application provides an inflatable antenna for marine rescue, such as Figures 1 to 3 As shown, in one embodiment, it includes: a base component, a radiation component and a feeding component.

[0043] The base component is a rotating body structure, and an axial air gap is provided at the center of the rotating body structure to form a cylindrical structure of the base component; a closed cavity is provided inside the cylindrical structure to be filled with gas to form an inflatable antenna for marine rescue.

[0044] The radiation member is provided on a side surface of the base member to radiate an antenna signal.

[0045] The feeding component is connected to the radiating component. The feeding component adopts coaxial feeding. The input impedance of the feeding port is 50 ohms, which matches the SMA interface, making it easy to connect to the test equipment and perform antenna testing.

[0046] In this embodiment, the base component is a membrane structure that can be inflated and deflated. Both the base component and the radiation component are made of flexible materials (existing technology) and have the property of being bendable, so that when the gas in the base component is discharged, the antenna can be folded, making it easy to transport and carry.

[0047] In one embodiment, the base component includes: a first part, a second part and a third part; the first part, the second part and the third part are all hollow circular structures, and the rotation axes are collinear; the first part, the second part and the third part are connected in sequence and the inner cavities are interconnected; the first part, the second part and the third part have the same inner diameter and different outer diameters.

[0048] Preferably, the outer diameters of the first part, the third part and the second part increase successively, so that the first part is equivalent to a director, the second part is equivalent to an active vibrator, and the third part is equivalent to a reflector, so as to ensure that the electromagnetic waves from the rear of the antenna are effectively reflected back to the front, thereby enhancing the directivity and gain of the antenna. At the same time, it ensures that they can effectively guide the electromagnetic waves from the active vibrator to the front, further increasing the directivity and gain of the antenna.

[0049] Further preferably, the air band gap is a cylindrical structure to introduce an air medium, and by changing the propagation speed, reflection characteristics, interference characteristics of electromagnetic waves between the air and the dielectric material, and the electromagnetic field distribution inside the antenna, the resonant frequency of the antenna is adjusted and its operating bandwidth is expanded; at the same time, when the antenna is worn on a person's arm, there is a certain gap between the antenna and the arm, forming different media. By utilizing the dielectric constant difference between the two and the base component, the electromagnetic field distribution inside the antenna and the propagation path of the electromagnetic wave can be changed, and multiple resonant modes can be excited. The overlap of these modes within the working frequency band further expands the bandwidth of the antenna.

[0050] Further preferably, the air band gap is an elliptical cylindrical structure to change the electric field and magnetic field distribution inside the resonator, thereby improving the resonant frequency and enhancing the quality factor.

[0051] In one embodiment, the radiation component includes: a first strip, a second strip and a third strip; the first strip, the second strip and the third strip are all annular, and the central axes are all collinear with the rotation axis of the first part, that is, the first strip, the second strip and the third strip are parallel to each other and are all perpendicular to the axial air gap; the first strip is sleeved on the side of the first part, the second strip is sleeved on the side of the second part, and the third strip is sleeved on the side of the third part.

[0052] Preferably, the first strip is provided with radiation slots spaced apart in a circumferential array to expand the bandwidth of the antenna.

[0053] Further preferably, the radiation slot is a square slot to change the original current path and introduce a new resonant mode, which interacts with other modes to jointly expand the bandwidth of the antenna. At the same time, the currents flowing through the corner ends of the square are perpendicular to each other, generating radiation zero points in specific frequency bands, which helps to suppress unnecessary frequency bands, thereby improving the impedance matching performance of the antenna in the required frequency band. In addition, by adjusting the size and position of the square slot, the position and bandwidth of the radiation zero point can be precisely controlled.

[0054] Further preferably, the number of the first strips is two, the two first strips are spaced apart and sleeved on the side surface of the first part, and there is a gap between the first strip and the second part to further expand the bandwidth of the antenna.

[0055] More preferably, the width of the second strip is equal to the height of the second portion.

[0056] More preferably, the width of the third strip is smaller than the height of the third portion, and there is a gap between the third strip and the second portion.

[0057] In one embodiment, the feed component is connected to the second strip to further extend the bandwidth of the antenna.

[0058] The above-mentioned inflatable marine rescue antenna is designed with a base component, a radiating component, and a feeding component. The antenna is integrated into a flexible film and the entire antenna is used as a swimming ring or life ring (especially an arm swimming ring or arm life ring). It can transmit and / or receive signals while providing buoyancy, transmit rescue information, and realize communication of the swimming ring or life ring. At the same time, the antenna bandwidth is expanded. Compared with other narrowband antennas, the antenna of the present application has a wider frequency band, can transmit and receive more signals, and improve antenna utilization. In addition, the antenna has high gain characteristics and excellent gain stability, has good radiation performance in the entire frequency band, can receive long-distance signals, and has a wide coverage range. It can achieve precise positioning of the wearer, improve the accuracy of marine positioning and the efficiency of marine rescue, improve the safety factor, and play a significant role in ensuring human safety. In addition, the inflatable antenna is made of a relatively thin material and can be inflated and deflated. It can operate normally in the inflated state, effectively reducing weight and being easy to integrate. In the uninflated state, it can be collapsed and folded, greatly reducing the volume and storage space of the antenna, making it easy to store and carry, convenient for transportation, and increasing the flexibility of the antenna.

[0059] In a specific embodiment, the material used for the base member is polyvinyl chloride, which has a relative dielectric constant of 4 and a density of 1.22 g / cm 3 , thickness is 2mm; the material used for the radiation component is conductive metal tape, and its conductivity is 1*10 6 S / m, thickness is 0.12mm, with good flexibility, it can bend along with the base component, so that the antenna can be folded and easy to carry. Figure 4 shown.

[0060] The electromagnetic full-wave simulation software CST was used to simulate and optimize the antenna. 11 The parameters, input impedance, antenna gain and radiation pattern are studied.

[0061] like Figure 5 As shown, S 11 The parameters are all below -10dB in the range of 3.4GHz-4.8GHz, proving that the antenna has a wider frequency band. Compared with ordinary narrowband antennas, it can receive and transmit signals in more frequency bands, and has a wide range of applications and high utilization rate.

[0062] like Figure 6 As shown in the figure, it can be seen that the input impedance of the antenna is an approximate straight line, which is close to 50 ohms. Since the test equipment used in the test, such as cables, are all 50 ohms, the input impedance of 50 ohms can match the cables, reduce the loss during the test, and is beneficial to actual processing and manufacturing.

[0063] like Figure 7As shown in the figure, the antenna gain remains above 5dBi between 3GHz and 5.5GHz, reaching a maximum of approximately 6.8dBi. This demonstrates the antenna's excellent radiation performance and its ability to receive long-distance signals. For maritime rescue operations, this allows for a wider search area, faster locating those in need, and improved rescue efficiency.

[0064] like Figures 8 to 10 As shown in the figure, it can be seen from the radiation pattern that the antenna's radiation pattern presents a horizontal "8" shape, which proves that the antenna radiates toward both sides. The antenna covers a wider range and can receive and transmit signals in a larger range.

[0065] To sum up, the inflatable antenna for maritime rescue of the present application can not only realize the function of antenna signal transmission, but also realize the function of arm swimming ring. When it is worn on the body, it can accurately locate the position of the person, provide protection for maritime positioning, and be conducive to timely detection of trapped persons during maritime rescue, prevent danger, ensure people's safety, and improve the efficiency and success rate of maritime rescue. It is suitable for fields such as wireless communication, large-scale search or signal reception, especially maritime rescue, prevention of children getting lost while swimming, etc. In addition, it is also of great significance to the development of arm ring antennas.

[0066] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0067] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. An inflatable antenna for marine rescue, characterized in that: include: Base component, radiation component and feeding component; The base component is a rotating body structure, and an axial air gap is provided at the center of the rotating body structure, so that the base component forms a cylindrical structure; a closed cavity is provided inside the cylindrical structure to be filled with gas to form a marine rescue inflatable antenna; The radiation component is provided on a side surface of the base component to radiate antenna signals; The feeding component is connected to the radiating component; The base component includes: a first part, a second part and a third part connected in sequence; The first part, the second part and the third part are all hollow annular structures, and the inner cavities are interconnected; the first part, the second part and the third part have the same inner diameter and different outer diameters; The outer diameters of the first part, the third part and the second part increase sequentially; The radiation component includes a first strip, a second strip, and a third strip in an annular shape; The first strip is sleeved on the side of the first part, the second strip is sleeved on the side of the second part, and the third strip is sleeved on the side of the third part; The first strip is provided with radiation slots arranged in a circumferential array.

2. The marine rescue inflatable antenna according to claim 1, characterized in that: There are two first strips, which are sleeved on the side surface of the first part at intervals, and there is a gap between the first strips and the second part.

3. The marine rescue inflatable antenna according to claim 1 or 2, characterized in that: The width of the second strip is equal to the height of the second portion.

4. The marine rescue inflatable antenna according to claim 1 or 2, characterized in that: The width of the third strip is smaller than the height of the third portion, and a gap is formed between the third strip and the second portion.

5. The marine rescue inflatable antenna according to claim 1 or 2, characterized in that: The power feeding component is connected to the second strip.

6. The marine rescue inflatable antenna according to claim 1 or 2, characterized in that: The base component is a membrane structure.

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