Dual-frequency fabric antenna based on multimode resonance technology

Abstract

The dual-frequency fabric antenna based on the multimode resonance technology comprises a dielectric layer, a fan-shaped ring patch, a floor and a capacitive grounding pin, the fan-shaped ring patch is arranged on one side of the dielectric layer, the floor is arranged on the other side of the dielectric layer, and the capacitive grounding pin penetrates through the dielectric layer so as to couple the fan-shaped ring patch and the floor. According to the dual-frequency fabric antenna based on the multi-mode resonance technology, on the basis of utilizing the mode of the patch, an additional structure is added to excite a mode which is difficult to excite by an original structure, and finally continuous matched bandwidth is realized, so that the multi-mode dual-frequency fabric antenna is realized, and bandwidth expansion is realized; the dual-frequency fabric antenna based on the multi-mode resonance technology can be made of fabric materials, so that the dual-frequency fabric antenna has the advantages that the fabric materials are soft and easy to fold, the shape plasticity is high, and the occupied space is reduced. The antenna is widely applied to the technical field of antennas.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, in particular to a dual-frequency fabric antenna based on multi-mode resonance technology. Background Art

[0002] With the development of wireless communication technology, the multi-mode performance of antennas faces higher requirements. Moreover, with the widespread application of wearable devices, the space occupied by antennas also needs to be compressed. The frequency band of current multi-mode antennas is relatively single and narrow, which makes it difficult to meet the frequency band requirements of new wireless communication protocols (such as Wi-Fi), and it is also difficult to take into account the performance of various aspects such as mode, bandwidth and space occupancy. Summary of the invention

[0003] In view of the technical problems that current antennas are difficult to balance the performance of various aspects such as mode, bandwidth and space occupancy, the purpose of the present invention is to provide a dual-frequency fabric antenna based on multi-mode resonance technology.

[0004] An embodiment of the present invention includes a dual-frequency fabric antenna based on multi-mode resonance technology, and the dual-frequency fabric antenna based on multi-mode resonance technology includes:

[0005] dielectric layer;

[0006] Sector-shaped ring patch; the sector-shaped ring patch is arranged on one side of the dielectric layer;

[0007] Floor; the floor is arranged on the other side of the medium layer;

[0008] Capacitive ground pin; the capacitive ground pin passes through the dielectric layer to couple the sector ring patch and the ground.

[0009] Furthermore, the shape of the sector ring patch is a sector ring, and the sector ring is obtained by cutting corners of a basic sector, removing a center portion, and opening a sector groove and a rectangular groove.

[0010] Furthermore, the basic sector shape is a 1 / 4 sector shape.

[0011] Furthermore, the contour of the fan-shaped groove is obtained by reducing the contour of the basic fan-shaped groove, and the side of the rectangular groove is connected to the arc of the fan-shaped groove.

[0012] Furthermore, the capacitive grounding pin includes a first grounding pin and a second grounding pin, the first grounding pin is connected to one end of the inner diameter of the fan-shaped ring patch, and the second grounding pin is connected to the other end of the inner diameter of the fan-shaped ring patch, and the first grounding pin and the second grounding pin respectively pass through the dielectric layer to reach the floor.

[0013] Furthermore, the dual-frequency fabric antenna based on multi-mode resonance technology also includes a feeding pin, the feeding pin is connected to the sector ring patch, and the feeding pin passes through the dielectric layer and the floor.

[0014] Furthermore, a first groove is formed on a portion of the floor surrounding the first ground pin, a second groove is formed on a portion of the floor surrounding the second ground pin, and a coplanar waveguide structure is provided at a position on the floor corresponding to the feeding pin.

[0015] Furthermore, the dual-frequency fabric antenna based on multi-mode resonance technology also includes a parasitic square patch and a third ground pin;

[0016] The parasitic square patch is arranged on one side of the dielectric layer, the parasitic square patch is located at the center of the basic sector, and the parasitic square patch is separated from the sector ring patch;

[0017] The third ground pin is connected to the parasitic square patch, and the third ground pin passes through the dielectric layer to reach the ground plane.

[0018] Furthermore, the fan-shaped ring patch, the parasitic square patch, the first ground pin, the second ground pin, the third ground pin and the floor are made of conductive cloth.

[0019] Furthermore, the material of the medium layer is wool felt.

[0020] The beneficial effects of the present invention are as follows: the dual-frequency fabric antenna based on multi-mode resonance technology in the embodiment can, on the basis of utilizing the mode of the patch itself, add additional structures to excite the mode that is difficult to excite with the original structure, and finally achieve continuous matching bandwidth, thereby realizing a multi-mode dual-frequency fabric antenna and achieving bandwidth expansion; and the dual-frequency fabric antenna based on multi-mode resonance technology can be manufactured using fabric materials, so it has the advantages of soft and easy folding of fabric materials, strong shape plasticity, and is conducive to reducing space occupancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the process of the dual-band fabric antenna design method in the embodiment;

[0022] Figure 2 Schematic diagram of the overall structure of a dual-frequency fabric antenna based on multi-mode resonance technology in an embodiment;

[0023] FIG3( a ) is a schematic diagram of a partial structure of a dual-frequency fabric antenna based on multi-mode resonance technology in an embodiment;

[0024] FIG3( b ) is a schematic diagram of the dimensions of the structure shown in FIG3( a );

[0025] Figure 4 Schematic diagram of simulation results of scattering parameters of dual-band fabric antenna in an embodiment;

[0026] Figure 5 The normalized measured and simulated radiation patterns of the E-plane (phi=45deg) of the dual-band fabric antenna in the embodiment at 2.4 GHz;

[0027] Figure 6 The normalized measured and simulated radiation patterns of the antenna H plane (phi=-45deg) of the dual-band fabric antenna in the embodiment at the frequency of 2.4 GHz;

[0028] Figure 7 The normalized measured and simulated radiation patterns of the E-plane (phi=45deg) of the dual-band fabric antenna in the embodiment at a frequency of 5.15 GHz;

[0029] Figure 8 The normalized measured and simulated radiation patterns of the antenna H plane (phi=-45deg) of the dual-band fabric antenna in the embodiment at a frequency of 5.15 GHz;

[0030] Fig. 9 The normalized measured and simulated radiation patterns of the E-plane (phi=45deg) of the dual-band fabric antenna in the embodiment at a frequency of 7.125 GHz;

[0031] Fig.10 The normalized measured and simulated radiation patterns of the antenna H plane (phi=-45deg) of the dual-band fabric antenna in the embodiment at a frequency of 7.125 GHz;

[0032] Fig.11 Schematic diagram of measured and simulated gain of the dual-band fabric antenna in the embodiment. DETAILED DESCRIPTION

[0033] Antenna: A device that transmits or receives energy in communication. The antenna transforms the guided waves propagating on the transmission line into electromagnetic waves propagating in free space; or vice versa.

[0034] Fabric antenna: A new type of antenna that combines antenna technology with textile materials. It mainly uses conductive fabrics, yarns, etc. to replace traditional metal materials as radiation units and transmission lines. These conductive fabrics can achieve conductive properties by mixing metal fibers into textile materials or using surface coatings.

[0035] Wireless Energy Harvesting: Wireless Energy Harvesting is a technology that obtains energy from the surrounding environment. It mainly receives various wireless forms of energy such as radio frequency (RF) signals, microwaves, light energy (such as solar energy), mechanical energy (such as vibration energy), thermal energy, etc., and converts these energies into electrical energy that can be stored and used by electronic devices.

[0036] Wavelength: It can be the wavelength corresponding to the center frequency of the antenna working band. The wavelength of the radiated signal in the air can be calculated by the speed of light and the signal frequency. Specifically, the wavelength in the air = speed of light + frequency. The speed of light is 3×10 8 m / s, and the frequency is MHz. The wavelength will change in the medium. where ε r is the relative dielectric constant.

[0037] Antenna resonant mode: refers to the working state of the antenna at a specific frequency. It describes the distribution and behavior of the electromagnetic field inside the antenna. The antenna mode has an important influence on the performance of the antenna, including radiation efficiency, directivity, bandwidth and polarization characteristics.

[0038] Antenna reflection coefficient: It is used to characterize the ratio of energy reflected back to the port and energy entering the antenna. In RF systems, energy will be reflected due to impedance mismatch. Therefore, the port and antenna need to have impedance matching. The better the impedance matching, the smaller the reflection coefficient of the antenna, the more energy entering the antenna, and the greater the radiation efficiency of the antenna. Conversely, the larger the reflection coefficient of the antenna, the smaller the energy entering the antenna, and the lower the radiation efficiency of the antenna. It can be simply expressed by S 11 Numerical description of S 11 The smaller it is, the smaller the reflection coefficient is.

[0039] Antenna gain: It is an important parameter to describe antenna performance, which is used to measure the ability of the antenna to convert input power into radiated power in a specific direction. It reflects the combined effect of the antenna's directivity and efficiency, and is usually expressed in decibels (dBi, based on isotropic antennas) or (dBd, based on dipole antennas). Simply put, antenna gain represents the multiple or ratio of the antenna's radiation intensity in a given direction compared to an ideal isotropic antenna (or dipole antenna).

[0040] Antenna radiation pattern: It refers to the graph of the relative field strength of the antenna radiation changing with the angle at a certain distance from the antenna. Generally, it is characterized by two mutually perpendicular antenna patterns.

[0041] Take Wi-Fi as an example of wireless communication protocol. Wi-Fi energy harvesting system provides reliable energy for textile electronic systems. However, the current multi-frequency antenna has limitations in bandwidth and flexibility, and cannot meet the bandwidth requirements of the new generation of Wi-Fi protocol and the flexibility requirements of textile electronic systems. In order to expand the frequency band of textile antennas, two ideas can be considered: parasitic resonant structure loading and multi-mode technology. Among them, although the loading of parasitic resonant structure can effectively expand the frequency band, it usually leads to an increase in the size of the antenna, limiting its application in wearable devices. Therefore, a multi-mode solution that does not require additional space can be used.

[0042] When a multimode solution is used, multimode performance can be achieved using two resonant modes in two frequency bands. For example, by combining TM 10 and TM 02 The antenna achieves dual-band operation and high out-of-band suppression characteristics by combining the resonant mode and the U-shaped slot. It is also possible to excite modes that would otherwise not be excited by loading auxiliary structures such as short-circuited circular patches, thereby achieving dual-band bandwidth coverage using omnidirectional and unidirectional modes.

[0043] Based on the above principle, in this embodiment, it is possible to use Figure 1 The dual-band fabric antenna design method shown in the figure designs a dual-band fabric antenna to solve the shortcomings of the current antenna, which has a single frequency band, insufficient bandwidth, and large space occupation. The process of the dual-band fabric antenna design method is as follows Figure 1 See Figure 1 ,The process of the dual-band fabric antenna design method includes:

[0044] (1) First, identify the basic fabric antenna structure and analyze the available frequency patterns on it;

[0045] (2) Introducing a short-circuit structure at a suitable position of the original structure to increase the short-circuit mode;

[0046] (3) further cutting grooves of specific shapes into the structure;

[0047] (4) Improve the matching and adjust the resonant frequency to a suitable value by cutting corners and loading parasitic structures;

[0048] (5) Complete the design of fabric dual-band antenna.

[0049] pass Figure 1 The dual-band fabric antenna design method shown in the figure can be used to design Figure 2 The dual-band fabric antenna based on multi-mode resonance technology is shown. Figure 2 ,The dual-band fabric antenna based on multi-mode resonance technology includes a dielectric layer, a sector ring patch, a ground and a capacitive grounding pin.

[0050] Reference Figure 2 The dielectric layer has two sides, the sector ring patch is arranged on one side of the dielectric layer, the floor is arranged on the other side of the dielectric layer, and the capacitive grounding pin passes through the dielectric layer to couple the sector ring patch and the floor.

[0051] Reference Figure 2 As shown in FIG3(a), the fan-shaped ring patch is in the shape of a fan-shaped ring. Referring to FIG3(a), the fan-shaped ring patch can be obtained by cutting off two corners of the basic fan-shaped ring (a corner is formed where a radius of the basic fan-shaped ring intersects with the arc) and removing the center portion (a portion extending from the center of the circle toward the arc, which may be in the shape of a fan or a rectangle, etc.) on the basis of a basic fan-shaped ring (a complete fan-shaped ring including two radii and an arc), and then opening a fan-shaped groove and a rectangular groove in the remaining portion.

[0052] In this embodiment, when making the fan-shaped ring patch, the material for making the fan-shaped ring patch can be first made into a basic fan-shaped shape, and then some materials are removed by cutting corners, removing the center of the circle, opening fan-shaped grooves and rectangular grooves, and the remaining materials form the fan-shaped ring patch. Alternatively, after the shape of the fan-shaped ring patch is determined by virtual shape design, the materials can be directly formed into the fan-shaped ring patch by 3D printing and other technologies.

[0053] In this embodiment, refer to Figure 2 As shown in Figure 3(a), the basic sector can be a 1 / 4 sector, that is, a sector with a corresponding central angle of 90°. The contour of the sector groove is obtained by reducing the contour of the basic sector, that is, the radius of the sector groove is parallel to the radius corresponding to the basic sector, and the arc of the sector groove coincides with the center of the circle corresponding to the arc of the basic sector.

[0054] In this embodiment, refer to Figure 2 3( a ), the side of the rectangular groove is connected to the arc of the fan-shaped groove, and the rectangular groove is located at the midpoint of the arc of the fan-shaped groove.

[0055] In this embodiment, refer to Figure 2 3(a), a dual-frequency fabric antenna based on multi-mode resonance technology is provided with a first ground pin and a second ground pin, the first ground pin is connected to one end of the inner diameter of the sector ring patch, the second ground pin is connected to the other end of the inner diameter of the sector ring patch, and the first ground pin and the second ground pin respectively pass through the dielectric layer to reach the floor. Figure 2 As shown in FIG3(a), a first groove is formed on a portion of the floor surrounding the first ground pin, and a second groove is formed on a portion of the floor surrounding the second ground pin. The first groove is combined with the first ground pin, and the second groove is combined with the second ground pin to form a capacitive ground pin.

[0056] In this embodiment, refer to Figure 2As shown in Figure 3(a), a dual-band fabric antenna based on multi-mode resonance technology is provided with a feeding pin, which is connected to the fan-shaped ring patch, passes through the dielectric layer and the floor, and a coplanar waveguide structure (CPW) is provided at a position corresponding to the feeding pin on the floor. The feeding pin is used to connect to an external signal source to feed the fan-shaped ring patch.

[0057] In this embodiment, the working principle of the dual-frequency fabric antenna based on multi-mode resonance technology is as follows: Figure 2 As shown, if the fan-shaped ring patch is replaced with a basic fan-shaped patch of the same position, the same material, and the same shape, then when the basic fan-shaped patch is fed, it has three modes itself; and in the dual-band fabric antenna based on multi-mode resonance technology in this embodiment, the capacitive grounding pin and the structural improvement of the fan-shaped ring patch relative to the basic fan-shaped patch are equivalent to adding an additional structure on the basis of the basic fan-shaped patch. Therefore, based on the first three modes of the basic fan-shaped patch, the additional structure can be added to excite the mode that is difficult to excite with the original structure, and finally a continuous matching bandwidth is achieved; specifically: by using the fan-shaped ring patch (equivalent to the basic The fan-shaped patch is processed by cutting corners, removing the center part, opening fan-shaped grooves and rectangular grooves, etc., so as to convert the basic fan-shaped patch into a fan-shaped ring patch), which can generate a rectangular patch 3 / 2λ mode; by adding a first grounding pin and a second grounding pin at both ends of the inner diameter of the fan-shaped ring patch respectively, and combining with the groove on the floor to form a capacitive grounding pin, a short-circuit mode can be added to the structure; the above improvements can realize a multi-mode dual-band fabric antenna, thereby achieving bandwidth expansion; and the dual-band fabric antenna based on multi-mode resonance technology can be made of fabric materials, so it has the advantages of soft and easy folding of fabric materials, strong shape plasticity, and is conducive to reducing space occupancy.

[0058] In this embodiment, refer to Figure 2 As shown in FIG3(a), a parasitic square patch and a third ground pin are provided in a dual-band fabric antenna based on multi-mode resonance technology. The parasitic square patch is provided on one side of the dielectric layer, that is, the side where the fan-shaped ring patch is located. The parasitic square patch is located at the center of the basic fan-shaped circle, for example, the center of the parasitic square patch coincides with the center of the basic fan-shaped circle. The parasitic square patch is separated from the fan-shaped ring patch, that is, the parasitic square patch and the fan-shaped ring patch are insulated.

[0059] In this embodiment, refer to Figure 2 3( a ), the third ground pin is connected to the parasitic square patch, and the third ground pin passes through the dielectric layer to reach the floor, thereby connecting the third ground pin to the parasitic square patch.

[0060] In this embodiment, by adding a parasitic square patch near the capacitive ground pin, the overall matching of the antenna can be improved. The parasitic square patch, the capacitive ground pin and the fan-shaped ring patch work together to enable the antenna to achieve dual-band and broadband coverage characteristics.

[0061] In this embodiment, conductive cloth and other materials can be used to make conductive structures such as the fan-shaped ring patch, the parasitic square patch, the first ground pin, the second ground pin, the third ground pin and the floor, etc. The conductive cloth is woven from silver-plated nickel fiber wire.

[0062] In this embodiment, the dielectric layer may be made of materials such as wool felt, etc. The wool felt has a dielectric constant of 1.4, a loss tangent of 0.02, and a thickness of 5.5 mm.

[0063] In this embodiment, in the structure shown in FIG. 3( a ), the dimensions of each part are shown in FIG. 3( b ), and the specific values ​​are as follows: L = 39.5 mm, R o =26.5mm, R i =11mm, w b =6.5mm, w f =2mm, w a =7.5mm, w g =7.7mm, w s =4mm, w1=3mm, w2=3.5mm, l b =1.6mm, l p =11mm, l f =3.7mm, l g =6.5mm, l s =9mm, g1=6.5mm, g2=4mm, g3=4.5mm, g4=6mm, g5=15mm.

[0064] The dual-frequency fabric antenna based on multi-mode resonance technology shown in Figure 3(b) is simulated, and the results are as follows: Figures 4 to 11 shown.

[0065] The simulation results of scattering parameters are shown in Figure 4 As shown, the 10-dB impedance bandwidth of the antenna in the two frequency bands is 15% [(2.32 to 2.70 (GHz)] and 59% [4.50 to 8.21 (GHz)] respectively. Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10The normalized measured and simulated radiation patterns of the antenna's E-plane (phi=45deg) and H-plane (phi=-45deg) at three frequencies: 2.4GHz, 5.15GHz, and 7.125GHz. Fig.11 The measured and simulated gains of the antennas in the corresponding frequency bands are shown. The maximum gain values ​​of the antenna in the two frequency bands are 4.2dBi and 7.2dBi respectively. The higher gain indicates that it is well suited for wireless energy harvesting.

[0066] according to Figures 4 to 11 It can be seen from the simulation results shown that the dual-frequency fabric antenna based on the multi-mode resonance technology in this embodiment can obtain satisfactory results in terms of scattering parameters, radiation pattern and gain.

[0067] The key technologies of the dual-frequency fabric antenna based on multi-mode resonance technology in this embodiment include:

[0068] 1. The fan-shaped ring patch, capacitive grounding pin, slot and parasitic patch are introduced. By optimizing the size reasonably, the three modes of the fan-shaped ring patch (corresponding to the initial structure, that is, the basic fan-shaped patch) and the mode resonance frequencies brought by the additional structure are close to each other, thus forming a wider dual-band passband and realizing the bandwidth expansion of the antenna;

[0069] 2. Capacitive ground pin can introduce TM at the appropriate frequency without destroying the original mode. 0，1 / 2 model;

[0070] 3. The fan-shaped ring patch can be formed by opening fan-shaped grooves and rectangular grooves on the basic fan-shaped patch (1 / 4 fan-shaped), while maintaining the original TM of the basic fan-shaped patch. 11 ,TM 21 ,TM 12 Based on the model, the new TM is introduced 20 Mode, the more resonant modes are utilized, which can provide extremely wide bandwidth in a limited size;

[0071] 4. The additional square parasitic patch and the complete ground pin improve the low-frequency matching of the antenna without increasing the area and size of the antenna, thus reducing the space occupied by the antenna;

[0072] 5. Adjusting the size and position of the antenna radiation unit can change the antenna scattering coefficient. Adjusting the material and dielectric constant of the dielectric layer can also change the antenna scattering coefficient.

[0073] 6. Made of conductive cloth, wool felt and other fabric materials, it has low production cost and can maintain stable performance such as scattering parameters when carried by the human body or bent.

[0074] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, etc. used in the present disclosure are only relative to the relative positional relationship of the components of the present disclosure in the accompanying drawings. The singular forms of "a", "" and "the" used in the present disclosure are also intended to include the plural forms, unless the context clearly indicates other meanings. In addition, unless otherwise defined, all technical and scientific terms used in this embodiment have the same meaning as those generally understood by those skilled in the art. The terms used in the specification of this embodiment are only for describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this embodiment includes any combination of one or more related listed items.

[0075] It should be understood that, although the term first, second, third etc. may be adopted to describe various elements in the present disclosure, these elements should not be limited to these terms. These terms are only used to distinguish the same type of elements from each other. For example, without departing from the scope of the present disclosure, the first element may also be referred to as the second element, and similarly, the second element may also be referred to as the first element. The use of any and all examples or exemplary language ("for example", "such as" etc.) provided by the present embodiment is only intended to better illustrate embodiments of the present invention, and unless otherwise required, the scope of the present invention will not be limited.

[0076] It should be appreciated that embodiments of the present invention may be implemented or enforced by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer-readable memory. The method may be implemented in a computer program using standard programming techniques - including a non-transitory computer-readable storage medium configured with a computer program, wherein the storage medium so configured causes the computer to operate in a specific and predefined manner - according to the methods and drawings described in the specific embodiments. Each program may be implemented in a high-level procedural or object-oriented programming language to communicate with a computer system. However, if desired, the program may be implemented in assembly or machine language. In any case, the language may be a compiled or interpreted language. In addition, the program may be run on a programmed dedicated integrated circuit for this purpose.

[0077] In addition, the operations of the process described in this embodiment may be performed in any suitable order, unless otherwise indicated in this embodiment or otherwise clearly contradicted by the context. The process described in this embodiment (or variations and / or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as a code (e.g., executable instructions, one or more computer programs, or one or more applications) executed on one or more processors in common, by hardware or a combination thereof. A computer program includes a plurality of instructions that may be executed by one or more processors.

[0078] Further, the method can be implemented in any type of computing platform that is operably connected to a suitable computer, including but not limited to a personal computer, a minicomputer, a mainframe, a workstation, a network or distributed computing environment, a separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, etc. Various aspects of the present invention can be implemented in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, an optical read and / or write storage medium, a RAM, a ROM, etc., so that it can be read by a programmable computer, and when the storage medium or device is read by the computer, it can be used to configure and operate the computer to perform the process described herein. In addition, the machine-readable code, or part thereof, can be transmitted via a wired or wireless network. When such media includes instructions or programs that implement the above steps in conjunction with a microprocessor or other data processor, the invention of this embodiment includes these and other different types of non-transitory computer-readable storage media. When programmed according to the methods and techniques of the present invention, the present invention also includes the computer itself.

[0079] The computer program can be applied to input data to perform the functions of the present embodiment, thereby converting the input data to generate output data stored in a non-volatile memory. The output information can also be applied to one or more output devices such as a display. In a preferred embodiment of the present invention, the converted data represents a physical and tangible object, including a specific visual depiction of the physical and tangible object produced on the display.

[0080] The above are only preferred embodiments of the present invention. The present invention is not limited to the above embodiments. As long as the technical effects of the present invention are achieved by the same means, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention. Within the scope of protection of the present invention, its technical solutions and / or implementation methods may have various modifications and changes.

Claims

1. A dual-frequency fabric antenna based on multi-mode resonance technology, characterized in that: The dual-frequency fabric antenna based on multi-mode resonance technology includes: dielectric layer; Sector-shaped ring patch; the sector-shaped ring patch is arranged on one side of the dielectric layer; Floor; the floor is arranged on the other side of the medium layer; Capacitive ground pin; the capacitive ground pin passes through the dielectric layer to couple the sector ring patch and the ground.

2. The dual-frequency fabric antenna based on multi-mode resonance technology according to claim 1, characterized in that: The fan-shaped ring patch is in the shape of a fan-shaped ring, which is obtained by cutting corners of a basic fan-shaped ring, removing a center portion, and opening a fan-shaped groove and a rectangular groove.

3. The dual-frequency fabric antenna based on multi-mode resonance technology according to claim 2 is characterized in that: The basic sector shape is a 1 / 4 sector shape.

4. The dual-frequency fabric antenna based on multi-mode resonance technology according to claim 2, characterized in that: The contour of the fan-shaped groove is obtained by reducing the contour of the basic fan-shaped groove, and the side of the rectangular groove is connected to the arc of the fan-shaped groove.

5. The dual-frequency fabric antenna based on multi-mode resonance technology according to any one of claims 2 to 4, characterized in that: The capacitive grounding pin includes a first grounding pin and a second grounding pin, the first grounding pin is connected to one end of the inner diameter of the fan-shaped ring patch, and the second grounding pin is connected to the other end of the inner diameter of the fan-shaped ring patch, and the first grounding pin and the second grounding pin respectively pass through the dielectric layer to reach the floor.

6. The dual-frequency fabric antenna based on multi-mode resonance technology according to claim 5, characterized in that: The dual-frequency fabric antenna based on multi-mode resonance technology also includes a feeding pin, which is connected to the sector ring patch and passes through the dielectric layer and the floor.

7. The dual-frequency fabric antenna based on multi-mode resonance technology according to claim 6, characterized in that: A first groove is formed on a portion of the floor surrounding the first ground pin, a second groove is formed on a portion of the floor surrounding the second ground pin, and a coplanar waveguide structure is provided at a position on the floor corresponding to the feeding pin.

8. The dual-frequency fabric antenna based on multi-mode resonance technology according to claim 5, characterized in that: The dual-frequency fabric antenna based on multi-mode resonance technology also includes a parasitic square patch and a third ground pin; The parasitic square patch is arranged on one side of the dielectric layer, the parasitic square patch is located at the center of the basic sector, and the parasitic square patch is separated from the sector ring patch; The third ground pin is connected to the parasitic square patch, and the third ground pin passes through the dielectric layer to reach the ground plane.

9. The dual-frequency fabric antenna based on multi-mode resonance technology according to claim 8, characterized in that: The fan-shaped ring patch, the parasitic square patch, the first ground pin, the second ground pin, the third ground pin and the floor are made of conductive cloth.

10. The dual-frequency fabric antenna based on multi-mode resonance technology according to claim 9, characterized in that: The material of the medium layer is wool felt.

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