Flexible wearable radio frequency front-end device and system

Abstract

The invention provides a flexible wearable radio frequency front-end device and system, and relates to the technical field of communication, the flexible wearable radio frequency front-end device comprises a flexible dielectric plate, an antenna radiator and a grounding plate, and the antenna radiator and the grounding plate both cover one side of the flexible dielectric plate; the antenna radiator comprises a radiator main body, the radiator main body is of a hexagonal star structure, a slot is formed in the center of the radiator main body, and the slot is of a hexagonal structure which is arranged in the same direction as the radiator main body. The problems that a traditional rigid antenna is limited in movement, uncomfortable to wear, limited in frequency band and the like can be remarkably solved, and therefore the antenna can be well applied to emergency rescue equipment.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a flexible wearable radio frequency front-end device and system. Background Art

[0002] At present, because timely and effective communication is crucial in emergency rescue operations, existing rescue equipment often includes communication equipment, and the commonly used communication equipment is rigid antenna. However, the traditional rigid antenna design has inconveniences and limitations in use, such as limited mobility, uncomfortable wearing, and frequency band restrictions. The above shortcomings limit the communication capabilities of the traditional rigid antenna design in emergency rescue equipment. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a flexible wearable RF front-end device and system, which can significantly improve the problems of limited mobility, uncomfortable wearing, frequency band limitation, etc. of traditional rigid antennas, so as to be better applied to emergency rescue equipment.

[0004] In a first aspect, an embodiment of the present invention provides a flexible wearable radio frequency front-end device, comprising: a flexible dielectric board, an antenna radiator and a ground plate, wherein the antenna radiator and the ground plate are both covered on one side of the flexible dielectric board;

[0005] The antenna radiator comprises a radiator body, which adopts a hexagonal star structure. A slot is arranged at the center of the radiator body, and the slot structure is a hexagonal structure with the same arrangement orientation as the radiator body.

[0006] In one embodiment, the antenna radiator further includes a plurality of first radiator branches, and the first radiator branches are located inside each vertex of the radiator body.

[0007] In one embodiment, the first radiator branch includes two radiator line segments, the endpoints of the two radiator line segments intersect, and the direction of the angle obtained by the intersection is consistent with the direction of the vertex angle of the radiator body.

[0008] In one implementation, the angle value corresponding to the angle obtained by the intersection is equal to the angle value corresponding to the vertex angle of the radiator body.

[0009] In one implementation, the antenna radiator further includes a second radiator branch, the second radiator branch is located outside the radiator body, and the second radiator branch has a rectangular structure.

[0010] In one embodiment, the ground plate adopts a trapezoidal structure, a slot is provided at the midline of the ground plate, and the slot structure is a rectangular structure with the same arrangement orientation as the second radiator branch.

[0011] In one embodiment, one end of the second radiator branch is located at any vertex in the radiator body, and the other end of the second radiator branch is located in the slot of the ground plate.

[0012] In one embodiment, the antenna radiator and the ground plane are in the same plane.

[0013] In one embodiment, an interface component is further included, the interface component is welded on the flexible dielectric board, and the interface component is used to transmit the signal to the antenna radiator.

[0014] In a second aspect, an embodiment of the present invention further provides a flexible wearable radio frequency front-end system, comprising any one of the flexible wearable radio frequency front-end devices provided in the first aspect.

[0015] A flexible wearable radio frequency front-end device and system provided by an embodiment of the present invention includes: a flexible dielectric plate, an antenna radiator and a ground plate, wherein the antenna radiator and the ground plate are both covered on one side of the flexible dielectric plate; the antenna radiator includes a radiator body, the radiator body adopts a hexagonal star structure, and a slot is arranged at the center of the radiator body, and the slot structure is a hexagonal structure with the same arrangement orientation as the radiator body. The above device uses the flexible dielectric plate to provide support for the antenna radiator and the ground plate, making the device softer, lighter, easier to bend and wear, thereby providing a more comfortable use experience. In addition, the radiator body adopts a hexagonal star structure, and the same structure is used to set the slot inside it, so that the device can cover more frequency bands. Therefore, the embodiment of the present invention can significantly improve the problems of limited mobility, uncomfortable wearing, frequency band limitation, etc. of traditional rigid antennas, so that it can be better applied to emergency rescue equipment.

[0016] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1A schematic structural diagram of a flexible wearable radio frequency front-end device provided in an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of dimension marking of a flexible wearable radio frequency front-end device provided in an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of a flexible wearable radio frequency front-end device provided by an embodiment of the present invention applied to emergency rescue equipment;

[0022] Figure 4 A schematic diagram for comparing antenna return losses under different iterations provided by an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of the current direction at the center frequency of a flexible wearable radio frequency front-end device provided in an embodiment of the present invention.

[0024] Icon: 1-flexible dielectric board; 2-antenna radiator; 21-radiator body; 22-first radiator branch; 23-second radiator branch; 3-ground plate. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described in combination with the embodiments below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Traditional rescue equipment usually uses a rigid antenna design, which has the following objective disadvantages:

[0027] 1. Limited mobility: Rigid antennas are usually fixed to the equipment, which limits the user's mobility. In emergency rescue operations, which require rapid maneuverability and flexible action, rigid antennas may become a hindrance to users.

[0028] 2. Inconvenient to wear: Rigid antennas are usually hard and solid, which may cause discomfort and pressure when worn. Especially when worn for a long time, it may cause pain or discomfort.

[0029] 3. Frequency band limitation: Traditional rigid antenna design is generally suitable for communication in a single frequency band or a limited frequency band, and cannot support multi-band communication requirements at the same time. In emergency rescue scenarios, it may be necessary to communicate with multiple devices or systems, so a wider range of frequency bands needs to be covered.

[0030] The above shortcomings limit the communication capabilities of traditional rigid antenna designs in emergency rescue equipment, so a flexible wearable antenna design is needed to improve these problems.

[0031] Based on this, the present invention provides a flexible wearable RF front-end device and system, which can significantly improve the problems of limited mobility, uncomfortable wearing, frequency band limitation, etc. of traditional rigid antennas, so that it can be better applied to emergency rescue equipment.

[0032] In emergency rescue scenarios, fast, efficient and reliable communication is essential. With the development of science and technology, wearable flexible antennas, as an emerging technology, provide rescuers with more flexible and effective communication solutions.

[0033] The present invention can be applied to a variety of disaster scenarios:

[0034] 1. Earthquake disaster scenario: Earthquake refers to a natural phenomenon in which the earth's crust vibrates violently, which can have a huge impact on humans and buildings. Earthquakes can cause building collapse, road and bridge collapse, water, electricity, and gas pipeline ruptures, etc., and can also cause casualties, disappearances, and property losses.

[0035] 2. Heavy rain and flood disaster scenarios: Heavy rain and flood refer to natural phenomena in which the amount of rainfall in a period of time exceeds the capacity of the local soil and drainage system, which will cause flooding, waterlogging, mudslides, etc. Flood disasters often cause buildings, roads and bridges to be submerged, traffic paralysis, power outages, etc.

[0036] 3. Hurricane storm disaster scenario: A hurricane is a high-speed rotating cyclone that causes strong winds and heavy rains, while hurricane storms refer to the waves and high tides caused by the hurricane. Hurricane storms can cause damage to buildings in coastal areas, the destruction of seawalls and docks, and traffic disruptions.

[0037] 4. Terrorist attack scenario: Terrorist attacks refer to the acts of some extremist organizations or individuals using violent means to attack the public or other targets. Terrorist attacks may cause casualties, property losses, etc.

[0038] 5. Public health emergency scenario: A public health emergency refers to an event that occurs suddenly and has an impact on public health, such as an infectious disease, food safety incident, or environmental pollution incident. A public health emergency may cause illness, death, or panic.

[0039] In the above scenarios, the communication system needs to meet the following requirements: First, after a disaster occurs, the communication system needs to be able to be established quickly so that rescue personnel can communicate and command; second, the communication system needs to be able to maintain stable and reliable communication quality in harsh environments to ensure the timely transmission and accuracy of information; third, the communication system needs to cover a wide geographical range so that rescue personnel can communicate and command in different locations; fourth, the communication system needs to be compatible and able to interconnect with different communication equipment and systems; fifth, the communication system needs to be secure and confidential to ensure that the communication content will not be illegally obtained and used, and to prevent leakage and destruction.

[0040] When the above-mentioned natural disasters occur, wearable flexible antennas can be integrated into rescue clothing, so that rescuers do not need to carry additional equipment during movement. The lightweight and flexible design of this antenna can adapt to complex environments, such as narrow ruins or muddy ground, to ensure smooth communication. Rescue teams also need to quickly obtain and share data. Wearable flexible antennas can support data transmission and remote monitoring, allowing rescuers to grasp the situation and respond in time. In addition, the compatibility of this antenna enables it to be connected to various medical devices, improving the efficiency and accuracy of rescue.

[0041] To facilitate understanding of this embodiment, a flexible wearable radio frequency front-end device disclosed in an embodiment of the present invention is first described in detail. Figure 1 A structural schematic diagram of a flexible wearable radio frequency front-end device is shown in FIG. Figure 1 The left picture in the figure is a front view of the flexible wearable RF front-end device, and the right picture is a side view of the flexible wearable RF front-end device. Figure 1 The diagram shows that the flexible wearable radio frequency front-end device includes: a flexible dielectric plate 1, an antenna radiator 2 and a ground plate 3, and the antenna radiator 2 and the ground plate 3 are both covered on one side of the flexible dielectric plate 1.

[0042] Please continue to see Figure 1 The antenna radiator 2 includes a radiator body 21, which adopts a hexagonal star structure (also known as a six-pointed star structure). A slot is arranged at the center of the radiator body 21, and the slot structure is a hexagonal structure with the same arrangement orientation as the radiator body 21.

[0043] Flexible wearable RF front-end device is also called flexible antenna. The embodiment of the present invention designs a flexible antenna with a hexagram structure, which is suitable for smart watches and other mobile terminal devices. The antenna adopts a coplanar waveguide structure for feeding, and prints a hexagram structure radiator model on the TLX-6 flexible dielectric board, which is evolved on the basis of the traditional triangular monopole radiating antenna. In the study, the influence of different feeder widths, dielectric board thicknesses and bending degrees on antenna performance was explored. Through simulation by HFSS software and combined with the measured data in the electromagnetic microwave darkroom, it was found that the antenna showed good performance in both the 2.175GHz-2.59GHz and 4.59GHz-5.05GHz frequency bands. This allows the antenna to cover multiple communication frequency bands, including ISM2400 band, WLAN (2402-24835MHz), WiMAX (2.3-2.7GHz), Bluetooth (2402-2480MHz), etc. The center frequency of the antenna is 2.38GHz and 4.87GHz, and it has the advantages of small size and wide frequency band coverage.

[0044] The flexible wearable RF front-end device provided in the embodiment of the present invention utilizes a flexible dielectric plate antenna radiator and a ground plate to provide support, making the device softer, lighter, easier to bend and wear, thereby providing a more comfortable use experience. In addition, the radiator body adopts a hexagonal star structure, and the same structure is used to set slots inside it, so that the device can cover more frequency bands. Therefore, the embodiment of the present invention can significantly improve the problems of limited mobility, uncomfortable wearing, frequency band limitation, etc. of traditional rigid antennas, so that it can be better applied to emergency rescue equipment.

[0045] In one embodiment, the purpose of the embodiment of the present invention is to provide a more reliable, flexible and comfortable communication capability to meet the needs of a flexible wearable RF front-end device for emergency rescue operations. The device includes a flexible dielectric board, an antenna radiator and an interface component, the interface component is welded on the flexible dielectric board, and the interface component is used to transmit the signal to the antenna radiator. The flexible wearable RF front-end device of the embodiment of the present invention provides a number of advantages, including: the flexible dielectric board makes the antenna softer, lighter, easier to bend and wear, providing a more comfortable use experience; the antenna design method can cover multiple frequency bands. The flexible wearable RF front-end device of the embodiment of the present invention provides a better communication solution, which is applied to emergency rescue equipment and provides better support for communication equipment in emergency rescue operations.

[0046] For ease of understanding, an embodiment of the present invention provides a specific implementation of a flexible wearable radio frequency front-end device.

[0047] Please continue to see Figure 1 , Figure 1The antenna radiator 2 is shown to further include a plurality of first radiator branches 22, which are located inside each vertex of the radiator body 21. In one example, the number of first radiator branches 22 is consistent with the number of vertex of the radiator body 21, that is, a total of 6 first radiator branches are included.

[0048] Please continue to see Figure 1 , Figure 1 It is also shown that the first radiator branch 22 includes two radiator line segments, the endpoints of the two radiator line segments intersect, and the direction of the angle obtained by the intersection is consistent with the direction of the vertex angle of the radiator body 21. In one example, for any vertex angle of the radiator body 21, a straight line is drawn through the vertex angle and the angle of the first radiator branch 22 inside, and the straight line passes through the center point of the radiator body 21.

[0049] Preferably, the angle value corresponding to the angle obtained by the intersection is equal to the angle value corresponding to the vertex angle of the radiator body 21 .

[0050] Please continue to see Figure 1 The antenna radiator 2 further includes a second radiator branch 23, which is located on the outside of the radiator body 21, specifically on a side close to the ground plate 3, and the second radiator branch 23 has a rectangular structure.

[0051] Please continue to see Figure 1 The ground plate 3 adopts a trapezoidal structure, and a slot is arranged at the midline of the ground plate 3. The slot is a rectangular structure with the same arrangement orientation as the second radiator branch 23. The rectangular size of the slot is larger than the rectangular size of the second radiator.

[0052] Please continue to see Figure 1 One end of the second radiator branch 23 is located at any vertex of the radiator body 21, and the other end of the second radiator branch 23 is located in the slot of the ground plate 3. Specifically, Figure 1 It is schematically shown that a portion of the second radiator branch 23 is located in the slot of the ground plate 3 .

[0053] The flexible wearable RF front-end device designed in the embodiment of the present invention has a six-pointed star-shaped radiator structure, and the antenna can cover multiple communication frequency bands such as ISM2400, WLAN (2402-24835MHz), WiMAX (2.3-2.7GHz), and Bluetooth (2402-2480MHz), and has a wide range of applications. The embodiment of the present invention is based on the theory of loop antenna and coplanar waveguide antenna, calculates preliminary data, and then optimizes the final size by HFSS simulation parameters, such as Figure 2 A schematic diagram of the dimensions of a flexible wearable radio frequency front-end device is shown. Figure 2 The dimensions of the antenna to be designed are marked in the figure, and the dimensions of the antenna are shown in Table 1.

[0054] Table 1 Antenna design dimensions

[0055]

[0056] At the same time, based on the advantages of coplanar waveguide over microstrip line feeding, the antenna adopts coplanar waveguide feeding. In order to minimize the impact on the antenna electrical parameters when the antenna is bent, the antenna radiator 2 and the ground plate 3 are in the same plane, which can effectively reduce the antenna shape, so that the antenna meets the small size requirements of the smart terminal antenna while meeting the antenna gain and low return loss.

[0057] Since the wearable RF front-end device needs to conform to the human body, when the device is placed in different parts of the human body, such as the arm, chest and head, its bending radius will change, which will lead to changes in the resonant frequency, bandwidth and radiation direction performance. Therefore, the performance evaluation of the device needs to consider its performance when placed in different parts of the human body to ensure that its basic performance meets the performance requirements. In order to more accurately evaluate the performance of the flexible antenna, relevant radiation characteristic tests are carried out while considering the human body background to test whether the basic performance of the antenna still meets the performance requirements when the device is placed in different parts of the human body. Such as Figure 3 A schematic diagram of a flexible wearable radio frequency front-end device applied to emergency rescue equipment is shown.

[0058] Furthermore, in order to achieve the goal of multi-band operation and obtain better frequency characteristics, the antenna structure has undergone a series of evolutions, such as Figure 4 A comparative schematic diagram of antenna return loss under different iterations is shown. The design process of the flexible wearable RF front-end device is as follows: (1) The traditional monopole radiating element is transformed into an inverted triangle radiating element. (2) On this basis, equilateral triangles of the same size and center are added to form a hexagonal star structure, thereby achieving a resonant frequency band of 2.38 GHz in the lower frequency band. (3) In order to improve the high-frequency performance, slots are introduced into the structure obtained in the antenna in the previous step. (4) Since it is recognized that the high-frequency gain may not meet the communication requirements, six first radiator branches 22 are added to increase the high-frequency gain, thereby achieving resonance at 4.87 GHz. (5) In addition, in order to meet the demand for narrower bandwidth, a trapezoidal ground plate 3 is also used to balance the antenna gain and bandwidth. Based on this structure, the current direction at the center frequency of the flexible wearable RF front-end device is as follows: Figure 5 shown.

[0059] At 2.38 / 4.87GHz, the peak gain of the designed antenna is -27.378dBi / -25.213dBi respectively. Figure 4The designed antenna has a peak gain of -27.378dBi at 2.38GHz and a peak gain of -25.213dBi at 4.87GHz. The bandwidth of the antenna covers multiple communication bands, including ISM2400 band, wireless LAN (2402-2483.5MHz), WiMAX (2.3-2.7GHz) and Bluetooth (2402-2480MHz).

[0060] Please continue to see Figure 4 , at center frequencies of 2.38GHz and 4.87GHz, the peak gains are 2.2dBi and 4.42dBi, respectively. This RF front-end device exhibits excellent radiation characteristics within the effective frequency band, with the E-plane and H-plane showing good omnidirectionality, uniform response in all directions and almost no zero points. In addition, the antenna also has a small cross-polarization characteristic, which means that the ability to respond to electric and magnetic fields in different directions is basically the same, thereby effectively avoiding inconsistency in signal polarization. This excellent performance enables the antenna to play an outstanding role in application fields such as wireless communications, improving transmission efficiency and signal quality.

[0061] In summary, the flexible wearable radio frequency front-end device provided by the embodiment of the present invention has at least the following characteristics:

[0062] (1) The antenna in the flexible wearable RF front-end device is fed by a coplanar waveguide structure, and a hexagram structure radiator model is printed on a TLX-6 flexible dielectric board. This model is evolved from the traditional triangular monopole radiating antenna.

[0063] (2) The radiation of the flexible wearable RF front-end device is good, and the radiation of its antenna has good omnidirectionality. The simulation and measurement results are in good agreement, which verifies the good radiation characteristics of the antenna. The flexible antenna has the characteristics of miniaturization, high stability, multi-band and wearable. The antenna covers multiple commercial frequency bands, such as ISM2400, WLAN (2402-24835MHz), WiMAX (2.3-2.7GHz), and Bluetooth (2402-2480MHz).

[0064] (3) The design of the flexible wearable RF front-end device is suitable for emergency rescue equipment and will not cause radiation damage to the human body, meeting the requirements for minimizing human radiation.

[0065] (4) The flexible wearable RF front-end device is combined with a wearable flexible antenna to provide better support for communication equipment in emergency rescue operations.

[0066] On the basis of the foregoing embodiments, an embodiment of the present invention provides a flexible wearable radio frequency front-end system, including the flexible wearable radio frequency front-end device provided in the foregoing embodiments.

[0067] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the flexible wearable RF front-end system described above can refer to the corresponding process in the aforementioned embodiment, and will not be repeated here.

[0068] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0070] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A flexible wearable radio frequency front-end device, characterized in that: include: A flexible dielectric plate, an antenna radiator and a ground plate, wherein the antenna radiator and the ground plate are both covered on one side of the flexible dielectric plate; The antenna radiator comprises a radiator body, the radiator body adopts a hexagonal star structure, a slot is arranged at the center of the radiator body, and the slot is a hexagonal structure with the same arrangement orientation as the radiator body.

2. The flexible wearable radio frequency front-end device according to claim 1, characterized in that: The antenna radiator further includes a plurality of first radiator branches, and the first radiator branches are located inside each vertex of the radiator body.

3. The flexible wearable radio frequency front-end device according to claim 2, characterized in that: The first radiator branch includes two radiator line segments, the endpoints of the two radiator line segments intersect, and the direction of the angle obtained by the intersection is consistent with the direction of the vertex angle of the radiator body.

4. The flexible wearable radio frequency front-end device according to claim 3, characterized in that: The angle value corresponding to the angle obtained by the intersection is equal to the angle value corresponding to the vertex angle of the radiator body.

5. The flexible wearable radio frequency front-end device according to claim 1, characterized in that: The antenna radiator further includes a second radiator branch, which is located outside the radiator body and has a rectangular structure.

6. The flexible wearable radio frequency front-end device according to claim 5, characterized in that: The ground plate adopts a trapezoidal structure, and a slot is arranged at the midline of the ground plate. The slot structure is a rectangular structure with the same arrangement orientation as the second radiator branch.

7. The flexible wearable radio frequency front-end device according to claim 6, characterized in that: One end of the second radiator branch is located at any vertex of the radiator body, and the other end of the second radiator branch is located in the slot of the ground plate.

8. The flexible wearable radio frequency front-end device according to claim 1, characterized in that: The antenna radiator and the ground plane are in the same plane.

9. The flexible wearable radio frequency front-end device according to claim 1, characterized in that: It also includes an interface component, which is welded on the flexible dielectric board and is used to transmit signals to the antenna radiator.

10. A flexible wearable radio frequency front-end system, characterized in that: A flexible wearable radio frequency front-end device comprising any one of claims 1 to 9.

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