Inflatable antenna for sea rescue

Abstract

The invention belongs to the technical field of antennas, and relates to a marine rescue inflatable antenna, which comprises a base body part, a radiation part and a feed part, the base body component is of a rotary body structure, and an axial air band gap is formed in the center of the rotary body structure so that the base body component can form a cylindrical structure. A closed cavity is formed in the cylindrical structure and is filled with gas, so that the inflatable antenna for sea rescue is formed; the radiation part is arranged on the side surface of the base body part to radiate an antenna signal; the feed component is connected with the radiation component. According to the invention, the efficiency and success rate of sea rescue can be improved.

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] Antenna, as the core component of wireless communication system, plays a key role in converting electromagnetic wave energy into electrical signals and is the bridge for wireless information transmission. It not only determines the radiation and reception efficiency of signals, but also directly affects 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 communication needs, but also promotes the progress of 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 life buoy and the antenna used for 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 in order to address the above technical problems, which can integrate the antenna with the lifebuoy 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; 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 arranged on a side surface of the base component to radiate an antenna signal; The feeding component is connected to the radiating component.

[0008] In one embodiment, the base member comprises: 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.

[0009] In one embodiment, outer diameters of the first portion, the third portion, and the second portion increase sequentially.

[0010] In one embodiment, the radiation component includes: a first strip, a second strip, and a third strip in an annular shape; 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.

[0011] In one embodiment, the first strip is provided with radiating slots arranged in a circumferential array. In one embodiment, the number of the first strips is two, the two first strips are sleeved on the side surface of the first portion at an interval, and there is a gap between the first strips and the second portion.

[0012] In one embodiment, the width of the second strip is equal to the height of the second portion.

[0013] In one embodiment, a width of the third strip is smaller than a height of the third portion, and a gap is provided between the third strip and the second portion.

[0014] In one embodiment, the feeding component is connected to the second strip.

[0015] In one embodiment, the base member is a membrane structure.

[0016] The above-mentioned inflatable antenna for marine rescue is designed with a base component, a radiation component and a feeding component, the antenna is integrated into a flexible film, and the antenna as a whole is used as a swimming ring or a life buoy (especially an arm swimming ring or an arm life buoy), which can transmit and / or receive signals while providing buoyancy, transmit rescue information, and realize the communication of the swimming ring or life buoy; 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 the antenna utilization rate; in addition, the antenna has high gain characteristics and good gain stability, has good radiation performance in the whole frequency band, can receive long-distance signals, has a wide coverage range, can realize the accurate positioning of the wearer, improves the accuracy of marine positioning and the efficiency of marine rescue, improves the safety factor, and plays a huge role in ensuring people's safety; in addition, the inflatable antenna is made of a thinner material, can be inflated and deflated, can work normally in the inflated state, effectively reduces weight, and is easy to integrate. It can be shrunk and folded in the uninflated state, greatly reducing the volume and storage space of the antenna, facilitating storage and carrying, and convenient transportation, and increasing the flexibility of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of an inflatable antenna for marine rescue in one embodiment; Figure 2 A perspective view of an inflatable antenna for marine rescue in one embodiment; Figure 3 A top view of an inflatable antenna for marine rescue in one embodiment; Figure 4 A dimension diagram of an inflatable antenna for marine rescue in one embodiment; Figure 5 S is an inflatable antenna for marine rescue in one embodiment. 11 Schematic diagram of the curve; Figure 6 A schematic diagram of an input impedance curve of an inflatable antenna for marine rescue in an embodiment; Figure 7 A schematic diagram of a gain curve of an inflatable antenna for marine rescue in one embodiment; Figure 8 A planar radiation pattern of an inflatable antenna for marine rescue at 3.5 GHz in one embodiment; Fig. 9 A planar radiation pattern of an inflatable antenna for marine rescue at 4 GHz in one embodiment; Fig.10 The planar radiation pattern of an inflatable antenna for marine rescue at 4.5 GHz in one embodiment.

[0018] Reference numerals: Base member 1, first portion 11, second portion 12, third portion 13, air gap 14; Radiating component 2, first strip 21, second strip 22, third strip 23, radiating slot 24; Feeding component 3. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0020] 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 components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "multiple groups" means at least two groups, such as two groups, three groups, etc., unless otherwise clearly and specifically defined.

[0022] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] 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 the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0024] The present 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.

[0025] 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 an inflatable antenna for marine rescue.

[0026] The radiation member is provided on a side surface of the base member to radiate an antenna signal.

[0027] The feeding component is connected to the radiating component. The feeding component adopts a coaxial feeding method, and the input impedance of the feeding port is 50 ohms, which matches the SMA interface, which is convenient for connecting with the test equipment to perform antenna testing.

[0028] 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 for easy transportation and carrying.

[0029] 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 ring 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.

[0030] 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 third part is equivalent to an active vibrator, and the second 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.

[0031] 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 working 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, and 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 to excite multiple resonant modes, and the overlap of these modes within the working frequency band further expands the bandwidth of the antenna.

[0032] 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 resonance frequency and enhancing the quality factor.

[0033] 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 center axes are all colinear 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.

[0034] Preferably, the first strip is provided with radiation slots spaced apart in a circumferential array to expand the bandwidth of the antenna.

[0035] 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 square corners 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.

[0036] 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.

[0037] More preferably, the width of the second strip is equal to the height of the second portion.

[0038] 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.

[0039] In one embodiment, the feed component is connected to the second strip to further extend the bandwidth of the antenna.

[0040] The above-mentioned inflatable antenna for marine rescue is designed with a base component, a radiation component and a feeding component, the antenna is integrated into a flexible film, and the antenna as a whole is used as a swimming ring or a life buoy (especially an arm swimming ring or an arm life buoy), which can transmit and / or receive signals while providing buoyancy, transmit rescue information, and realize the communication of the swimming ring or life buoy; 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 the antenna utilization rate; in addition, the antenna has high gain characteristics and good gain stability, has good radiation performance in the whole frequency band, can receive long-distance signals, has a wide coverage range, can realize the accurate positioning of the wearer, improves the accuracy of marine positioning and the efficiency of marine rescue, improves the safety factor, and plays a huge role in ensuring people's safety; in addition, the inflatable antenna is made of a thinner material, can be inflated and deflated, can work normally in the inflated state, effectively reduces weight, and is easy to integrate. It can be shrunk and folded in the uninflated state, greatly reducing the volume and storage space of the antenna, facilitating storage and carrying, and convenient transportation, and increasing the flexibility of the antenna.

[0041] 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 6S / m, with a thickness of 0.12mm, it has good flexibility and can bend with the base component, so that the antenna can be folded for easy carrying. Figure 4 shown.

[0042] The electromagnetic full-wave simulation software CST is used to simulate and optimize the antenna. 11 The parameters, input impedance, gain and radiation pattern of the antenna are studied.

[0043] 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. It is widely used and has high utilization rate.

[0044] 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 such as cables used in the test are all 50 ohms, the input impedance of 50 ohms can match the cables, reduce the loss during testing, and is beneficial to actual processing and manufacturing.

[0045] like Figure 7 As shown in the figure, the antenna gain is kept above 5dBi between 3GHz and 5.5GHz, and can reach up to 6.8dBi, which proves that the antenna has good radiation performance and can receive long-distance signals. For maritime rescue, a wider area can be searched and people in need of rescue can be found more quickly, which is conducive to improving the efficiency of rescue.

[0046] like Figures 8 to 10 As shown, it can be seen from the radiation pattern that the radiation pattern of the antenna 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.

[0047] 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 guarantee for maritime positioning, and be beneficial to timely find the trapped person in maritime rescue, prevent danger, ensure people's safety, and improve the efficiency and success rate of maritime rescue. It is suitable for wireless communication, large-scale search or signal reception and other fields, especially maritime rescue, prevention of children getting lost while swimming and other scenarios. In addition, it is also of great significance to the development of arm ring antennas.

[0048] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0049] The technical features of the above embodiments may 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.

[0050] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached 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 arranged on a side surface of the base component to radiate an antenna signal; The feeding component is connected to the radiating component.

2. The marine rescue inflatable antenna according to claim 1, characterized in that: The base component comprises: 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.

3. The marine rescue inflatable antenna according to claim 2, characterized in that: The outer diameters of the first portion, the third portion and the second portion increase sequentially.

4. The marine rescue inflatable antenna according to claim 2 or 3, characterized in that: The radiation component includes: a first strip, a second strip, and a third strip in an annular shape; 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.

5. The marine rescue inflatable antenna according to claim 4, characterized in that: The first strip is provided with radiation slots arranged in a circumferential array.

6. The marine rescue inflatable antenna according to claim 5, characterized in that: The number of the first strips is two, and the two first strips 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.

7. The marine rescue inflatable antenna according to claim 6, characterized in that: The width of the second strip is equal to the height of the second portion.

8. The marine rescue inflatable antenna according to claim 7, characterized in that: 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.

9. The marine rescue inflatable antenna according to claim 4, characterized in that: The feeding component is connected to the second strip.

10. The marine rescue inflatable antenna according to any one of claims 1 to 3, characterized in that: The base component is a membrane structure.

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