Invasive flexible conformal antenna for buried space rescue and assembly state device

Abstract

The invention discloses an intrusive flexible conformal antenna for buried space rescue and a set state device, and mainly solves the problem that an antenna cannot intrude into a narrow gap to search mobile phone signals in a rescue environment in the prior art. The intrusive flexible conformal antenna is composed of a flexible dielectric substrate, a radiation patch, a microstrip feeder line and a metal ground. Wherein the radiation patch and the microstrip feeder are arranged on the front surface of the flexible dielectric substrate, and the metal ground is arranged on the back surface of the flexible dielectric substrate; the intrusive flexible conformal antenna is bent, conformally wound and conformal to carriers with different dielectric constants, so that the intrusive flexible conformal antenna is effectively attached to a cable with a certain dielectric constant, effective deployment in a narrow gap is achieved, and rescue work is completed. The aggregation state device can work in a communication system supporting 2G / 3G / 4G / 5G, WiFi and Bluetooth, the detection coverage frequency band is 1710-2635 MHz, the requirement for the search range of the mobile phone signal bandwidth is met, and the omnidirectional radiation characteristic is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless communications, and in particular relates to an invasive flexible conformal antenna and an aggregate device for buried space rescue. Background Art

[0002] With the rapid development of wireless communication technology, antennas play an increasingly important role in people's daily lives. Especially in the field of rescue detection, after disasters such as earthquakes, landslides, and collapses, it is crucial to quickly and accurately lock the location of the victim's smartphone. In this natural environment, traditional communication methods are often limited by environmental damage and cannot work effectively, and rescue teams need a device that can penetrate gaps in the rescue environment to search for frequency band signals. At present, the detection of digital terminal equipment at home and abroad may not be able to lock the location of the user's smartphone.

[0003] Existing conformal antennas made of flexible materials have the characteristics of bendability and adhesion to irregular surfaces. Some invasive antennas are designed to extend into obstacles in specific environments, but they are usually designed for specific applications and lack flexibility and adaptability to work in complex environments. In order to adapt to different communication devices and protocols, some antennas are designed to operate in multiple frequency bands, but they cannot flexibly fit with cables with a certain dielectric constant and cannot be deployed in narrow gaps. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides an invasive flexible conformal antenna and a collective state device for buried space rescue. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0005] In a first aspect, the present invention provides an invasive flexible conformal antenna for buried space rescue, which is used to search for mobile phone signals in narrow gaps in an intrusive rescue environment. The invasive flexible conformal antenna comprises:

[0006] Flexible dielectric substrate, radiation patch, microstrip feed line and metal ground;

[0007] The radiation patch is arranged on the front side of the flexible dielectric substrate, with its center located on the axis of the flexible dielectric substrate, forming a dipole antenna;

[0008] The microstrip feed line is arranged on the front side of the flexible dielectric substrate, and its center is located on the axis of the flexible dielectric substrate; the microstrip feed line is used to connect the radiation patch and an external feeding SMA;

[0009] The metal ground is arranged on the back side of the flexible dielectric substrate, and the center is located on the axis of the flexible dielectric substrate;

[0010] The intrusive flexible conformal antenna is able to radiate normally after being bent and conformally wound.

[0011] In one embodiment of the present invention, the thickness of the flexible dielectric substrate is 0.05-0.25 mm, the dielectric constant is 2.0-3.0, and the dielectric loss tangent is 0.0005-0.002.

[0012] In one embodiment of the present invention, the shape of the radiating patch comprises a circle.

[0013] In one embodiment of the present invention, the radiating patch is used as a dipole antenna, and the radius formula of the dipole antenna with respect to frequency is as follows:

[0014]

[0015] Where r is the radius of the dipole antenna, c is the speed of light, f is the operating frequency of the dipole antenna, and ε eff Represents the relative dielectric constant.

[0016] In one embodiment of the present invention, the metal ground has a width of 5-15 mm and a length of 40-80 mm.

[0017] In a second aspect, the present invention provides a collective state device, the collective state device comprising:

[0018] The cable and the invasive flexible conformal antenna for buried space rescue described in the first aspect; wherein,

[0019] The intrusive flexible conformal antenna is bent and conformally wound with the cable.

[0020] In one embodiment of the present invention, the cable is a solid cylinder or a virtual cylinder.

[0021] In one embodiment of the present invention, the diameter of the cable is 10-30 mm, and the dielectric constant is 2-4.

[0022] Beneficial effects of the present invention:

[0023] In the solution provided by the present invention, the invasive flexible conformal antenna composed of a flexible dielectric substrate, a radiation patch, a microstrip feeder and a metal ground can be conformed to carriers of different dielectric constants by bending and conformal winding, so as to effectively fit on a cable with a certain dielectric constant, and achieve effective deployment in narrow gaps to complete rescue work. The collective device can work in the communication system supporting 2G / 3G / 4G / 5G, WiFi, and Bluetooth, with a detection coverage frequency band of 1710-2635MHz, which meets the search range of mobile phone signal bandwidth and has strong omnidirectional radiation characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of an invasive flexible conformal antenna for buried space rescue provided by an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of an intrusive flexible conformal antenna provided by an embodiment of the present invention being bent into arc shapes with radii of 30 mm and 10 mm respectively;

[0026] Figure 3 A curve diagram of S11 reflection coefficient simulation of the invasive flexible conformal antenna provided in an embodiment of the present invention;

[0027] Figure 4 The directional pattern of the invasive flexible conformal antenna provided by the embodiment of the present invention in the frequency band where S11 is less than -10dB;

[0028] Figure 5 A curve diagram of the S11 reflection coefficient simulation when the intrusive flexible conformal antenna provided by an embodiment of the present invention is bent to a radius of 30 mm;

[0029] Figure 6 The directional pattern of the invasive flexible conformal antenna provided by the embodiment of the present invention in the frequency band where S11 is less than -10dB when the antenna is bent to a radius of 30mm;

[0030] Figure 7 A curve diagram of the S11 reflection coefficient simulation when the invasive flexible conformal antenna provided by an embodiment of the present invention is bent to a radius of 10 mm;

[0031] Figure 8 The invasive flexible conformal antenna provided by the embodiment of the present invention has a directivity pattern within a frequency band where S11 is less than -10dB when the antenna is bent to a radius of 10mm;

[0032] Fig. 9 A schematic diagram of modeling a collective state device provided by an embodiment of the present invention;

[0033] Fig.10 A curve diagram of the S11 reflection coefficient simulation when the dielectric constant of the cable in the collective state device provided by the embodiment of the present invention is 2;

[0034] Fig.11 The directional pattern in the frequency band where S11 is less than -10dB when the dielectric constant of the cable in the collective state device provided by the embodiment of the present invention is 2;

[0035] Fig.12 A curve diagram of the S11 reflection coefficient simulation when the dielectric constant of the cable in the collective state device provided by the embodiment of the present invention is 3;

[0036] Fig.13When the dielectric constant of the cable in the collective state device provided by the embodiment of the present invention is 3, S11 is less than the directivity diagram in the -10dB frequency band. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0038] The embodiments of the present invention provide an invasive flexible conformal antenna and an aggregate device for buried space rescue.

[0039] Below, firstly, an invasive flexible conformal antenna for buried space rescue provided by an embodiment of the present invention is introduced.

[0040] An invasive flexible conformal antenna for buried space rescue provided by an embodiment of the present invention is used to search for mobile phone signals in narrow gaps in an intrusive rescue environment. The invasive flexible conformal antenna, such as Figure 1 As shown, it may include:

[0041] Flexible dielectric substrate 1, radiation patch 2, microstrip feed line 3 and metal ground 4;

[0042] The radiation patch 2 is arranged on the front surface of the flexible dielectric substrate 1, with its center located on the axis of the flexible dielectric substrate 1, forming a dipole antenna;

[0043] The microstrip feed line 3 is arranged on the front side of the flexible dielectric substrate 1, and its center is located on the axis of the flexible dielectric substrate 1; the microstrip feed line 3 is used to connect the radiation patch 2 and the external feeding SMA;

[0044] The metal ground 4 is arranged on the back side of the flexible dielectric substrate 1, and its center is located on the axis of the flexible dielectric substrate 1;

[0045] The intrusive flexible conformal antenna is conformally wound and can radiate normally.

[0046] The intrusive flexible conformal antenna provided in the embodiment of the present invention is composed of a flexible dielectric substrate, a radiation patch, a microstrip feed line and a metal ground. The bending radius of the intrusive flexible conformal antenna is 30 mm and 10 mm. Please refer to the schematic diagram of the arc shape. Figure 2 As shown, from Figure 2 It can be seen that the invasive flexible conformal antenna can be conformally wound by bending to conform to carriers with different dielectric constants, so as to effectively fit on the cable with a certain dielectric constant and achieve effective deployment in narrow gaps to complete rescue work.

[0047] Preferably, the thickness of the flexible dielectric substrate 1 may be 0.05-0.25 mm, the dielectric constant may be 2.0-3.0, and the dielectric loss tangent may be 0.0005-0.002.

[0048] The shape of the radiation patch 2 may include a circle.

[0049] The width of the metal ground 4 may be 5-15 mm, and the length may be 40-80 mm.

[0050] The metal ground 4 is processed on the back of the flexible dielectric substrate 1, and the radiation patch 2 and the microstrip feed line 3 are printed on the front of the flexible dielectric substrate 1. This design method helps to achieve the omnidirectional radiation characteristics of the intrusive flexible conformal antenna, and better impedance matching can be achieved by optimizing the width and length of the metal ground 4. The microstrip feed line 3 is used to connect the radiation patch 2 and the external feeding SMA to ensure that the intrusive flexible conformal antenna can achieve 50 ohm impedance matching and high bandwidth characteristics, thereby improving the signal transmission efficiency and the radiation performance of the antenna.

[0051] The working principle of the intrusive flexible conformal antenna provided in the embodiment of the present invention is as follows:

[0052] Optionally, the invasive flexible conformal antenna selects a flexible dielectric substrate 1 with a thickness of 0.127 mm, a dielectric constant of 2.1, and a dielectric loss tangent of 0.001. These characteristics play a vital role in the resonance frequency and signal transmission efficiency of the antenna. The circular radiation patch 2 and the microstrip feed line 3 are printed on the front of the flexible dielectric substrate 1, and the metal ground 4 is processed on the back of the flexible dielectric substrate 1. Through the optimized design, the input impedance of the antenna is matched to 50 ohms, which matches the standard RF coaxial cable (such as the external feed SMA), ensuring the effective transmission and low loss of the signal.

[0053] Radiating patch 2 is used as a dipole antenna. The radius formula of the dipole antenna with respect to frequency is as follows:

[0054]

[0055] Where r is the radius of the dipole antenna, c is the speed of light, f is the operating frequency of the dipole antenna, and ε eff Represents the relative dielectric constant.

[0056] The invasive flexible conformal antenna covers 2G / 3G / 4G / 5G, WiFi, and Bluetooth communication systems, and ensures the radiation efficiency and coverage of the antenna in all directions through the omnidirectional radiation mode. By adjusting the physical size and electrical parameters of the invasive flexible conformal antenna, the invasive flexible conformal antenna can adapt to different medium environments and maintain its radiation characteristics.

[0057] The following is a further description of the technical effect of the intrusive flexible conformal antenna provided by the embodiment of the present invention in combination with simulation experiments:

[0058] Simulation conditions: The above embodiment is simulated using the commercial simulation software HFSS.

[0059] Simulation content:

[0060] Simulation 1: Simulate the S11 reflection coefficient of the intrusive flexible conformal antenna in the frequency band of 1.6GHz-2.8GHz, and observe the directional pattern in the frequency band where S11 is less than -10dB. For a curve chart of the S11 reflection coefficient simulation of the intrusive flexible conformal antenna provided in the embodiment of the present invention, please refer to Figure 3 ,from Figure 3 It can be seen that the S11 of the intrusive flexible conformal antenna is less than -10dB in the frequency range of 1.7GHz to 2.7GHz, which is included in the search frequency band of mobile phone signals; the directional diagram of the intrusive flexible conformal antenna in the frequency band where S11 is less than -10dB, please refer to Figure 4 ,from Figure 4 It can be seen that the invasive flexible conformal antenna has strong omnidirectional radiation capability.

[0061] Simulation 2: Based on simulation 1, the intrusive flexible conformal antenna is bent into arc shapes with a radius of 30mm and 10mm respectively to simulate the S11 reflection coefficient, and observe the directional pattern in the frequency band where S11 is less than -10dB. For the curve of the S11 reflection coefficient simulation when the intrusive flexible conformal antenna is bent to a radius of 30mm, please refer to Figure 5 , the S11 reflection coefficient simulation curve of the intrusive flexible conformal antenna when bent to a radius of 10mm, see Figure 7 ,from Figure 5 and Figure 7 It can be seen that: at this time, the S11 of the intrusive flexible conformal antenna is less than -10dB in the frequency range of 1.7GHz-2.7GHz, which is included in the search frequency band of mobile phone signals. When the intrusive flexible conformal antenna is bent to a radius of 30mm, the S11 is less than -10dB in the frequency band. Please refer to Figure 6 , when the intrusive flexible conformal antenna is bent to a radius of 10mm, S11 is less than -10dB in the frequency band, please refer to Figure 8 ,from Figure 6 and Figure 8 It can be seen that the invasive flexible conformal antenna has strong omnidirectional radiation capability.

[0062] In a second aspect, corresponding to the above-mentioned intrusive flexible conformal antenna embodiment, the embodiment of the present invention further provides a collective state device, such as Fig. 9 As shown, the collective state device may include:

[0063] A cable and an intrusive flexible conformal antenna as described in the first aspect; wherein,

[0064] The intrusive flexible conformal antenna is bent and conformally wound with the cable.

[0065] The invasive flexible conformal antenna can be designed to be able to bend and conformally wrap with the cylindrical cable, so that the invasive flexible conformal antenna can fit tightly on the cables with different dielectric constants to adapt to the bending and deformation of different cables. The cable can be a solid cylinder or a virtual cylinder. The diameter of the cable can be 10-30 mm, and the dielectric constant can be 2-4. Through the above design, the collective state device can adapt to different rescue environments, especially when it is necessary to invade narrow gaps in ruins.

[0066] It can be understood that the flexible dielectric substrate of the intrusive flexible conformal antenna allows its parameters to be optimized in a bending scenario to meet the requirements for normal radiation after bending conformally with the cable. The cable-antenna integrated collective device provided in the embodiment of the present invention can provide stable communication capabilities. The design of the intrusive flexible conformal antenna takes into account the changes when fitting with cables with different dielectric parameters. By adjusting the physical size and electrical parameters of the intrusive flexible conformal antenna, the intrusive flexible conformal antenna can adapt to different dielectric environments and maintain its radiation characteristics. The cable-antenna integrated collective device has a simple manufacturing process, low manufacturing cost, and high cost-effectiveness; and it has high reliability and durability in practical applications, and is easy to deploy and rescue detection.

[0067] The following is a further description of the technical effect of the collective state device provided by the embodiment of the present invention in combination with simulation experiments:

[0068] Simulation conditions: The above embodiment is simulated using the commercial simulation software HFSS.

[0069] Simulation content:

[0070] Simulation 3: Based on the simulation 2 proposed in the first aspect, the cable-antenna joint modeling is performed for the collective state devices with dielectric constants of 2 and 3, respectively. The shape of the cable is a cylinder with a radius of 10mm. The S11 reflection coefficient is simulated in the frequency band of 1.6GHz-2.8GHz, and the directional pattern in the frequency band where S11 is less than -10dB is observed. For a curve chart of the S11 reflection coefficient simulation when the dielectric constant of the cable in the collective state device provided in the embodiment of the present invention is 2, please refer to Fig.10 , the curve of S11 reflection coefficient simulation when the dielectric constant of the cable is 3, see Fig.12 ,from Fig.10 and Fig.12It can be seen that: at this time, the S11 of the cable-antenna integrated collective device is less than -10dB in the frequency range of 1.7GHz-2.7GHz, which is included in the search frequency range of mobile phone signals. For the directional diagram of the frequency band in which the S11 is less than -10dB when the dielectric constant of the cable in the collective device provided by the embodiment of the present invention is 2, please refer to Fig.11 , when the dielectric constant of the cable is 3, S11 is less than the directivity diagram in the -10dB band, see Fig.13 ,from Fig.11 and Fig.13 It can be seen that the cable-antenna integrated collective device has the advantage of good omnidirectional radiation.

[0071] In summary, the invasive flexible conformal antenna provided in the embodiment of the present invention can stably fit on cylindrical cables with different dielectric constants and maintain strong omnidirectional radiation characteristics. The cable-antenna integrated collective device operates in the frequency range of 1.7GHz-2.7GHz with S11 less than -10dB, which meets the mobile phone signal search frequency band.

[0072] In the embodiment of the present invention, the invasive flexible conformal antenna composed of a flexible dielectric substrate, a radiation patch, a microstrip feeder and a metal ground can be conformed to carriers of different dielectric constants by bending and conformal winding, so as to effectively fit on a cable with a certain dielectric constant, and achieve effective deployment in narrow gaps to complete rescue work. The collective device can work in the communication system supporting 2G / 3G / 4G / 5G, WiFi, and Bluetooth, with a detection coverage frequency band of 1710-2635MHz, which meets the search range of mobile phone signal bandwidth and has strong omnidirectional radiation characteristics.

[0073] It should be noted that in the description of the present invention, it should be understood that after understanding the core principles of the present invention, those skilled in the art may make various modifications and improvements in form and details to the embodiments, such as material selection, size and angle adjustment, etc., to adapt to different application requirements. These changes and adjustments based on the ideas of the present invention still fall within the scope of protection of the claims of the present invention. Therefore, the scope of protection of the present invention shall be based on the claims, rather than being limited to the described embodiments.

[0074] In addition, the orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. An invasive flexible conformal antenna for buried space rescue, used to search for mobile phone signals in narrow gaps in the rescue environment, characterized in that: Intrusive flexible conformal antenna, including: Flexible dielectric substrate (1), radiation patch (2), microstrip feed line (3) and metal ground (4); The radiation patch (2) is arranged on the front side of the flexible dielectric substrate (1), with its center located on the axis of the flexible dielectric substrate (1), forming a dipole antenna; The microstrip feed line (3) is arranged on the front side of the flexible dielectric substrate (1), and its center is located on the axis of the flexible dielectric substrate (1); the microstrip feed line (3) is used to connect the radiation patch (2) and an external feeding SMA; The metal ground (4) is arranged on the back side of the flexible dielectric substrate (1), and its center is located on the axis of the flexible dielectric substrate (1); The intrusive flexible conformal antenna is able to radiate normally after being bent and conformally wound.

2. The invasive flexible conformal antenna for buried space rescue according to claim 1, characterized in that: The flexible dielectric substrate (1) has a thickness of 0.05-0.25 mm, a dielectric constant of 2.0-3.0, and a dielectric loss tangent of 0.0005-0.

002.

3. The invasive flexible conformal antenna for buried space rescue according to claim 1, characterized in that: The shape of the radiation patch (2) includes a circle.

4. The invasive flexible conformal antenna for buried space rescue according to claim 3, characterized in that: The radiation patch (2) is used as a dipole antenna, and the radius formula of the dipole antenna with respect to frequency is as follows: Where r is the radius of the dipole antenna, c is the speed of light, f is the operating frequency of the dipole antenna, and ε eff Represents the relative dielectric constant.

5. The invasive flexible conformal antenna for buried space rescue according to claim 1, characterized in that: The width of the metal ground (4) is 5-15 mm, and the length is 40-80 mm.

6. A collective state device, characterized in that: include: A cable and an invasive flexible conformal antenna for rescue in buried space as described in any one of claims 1 to 5; wherein, The intrusive flexible conformal antenna is bent and conformally wound with the cable.

7. The collective state device according to claim 6, characterized in that: The cable is a solid cylinder or a virtual cylinder.

8. The collective state device according to claim 7, characterized in that: The diameter of the cable is 10-30 mm, and the dielectric constant is 2-4.

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