A dual-band fabric antenna based on multi-mode resonance technology

Abstract

This invention discloses a dual-band fabric antenna based on multimode resonance technology, comprising a dielectric layer, a sector-shaped ring patch, a ground plane, and a capacitive grounding pin. The sector-shaped ring patch is disposed on one side of the dielectric layer, and the ground plane is disposed on the other side. The capacitive grounding pin passes through the dielectric layer to couple the sector-shaped ring patch and the ground plane. This dual-band fabric antenna based on multimode resonance technology can, in addition to utilizing the modes of the patch itself, excite modes that are difficult to excite using the original structure, ultimately achieving continuous matching bandwidth. This enables a multi-mode dual-band fabric antenna, thus extending bandwidth. Furthermore, this dual-band fabric antenna based on multimode resonance technology can be manufactured using fabric materials, thus possessing advantages such as softness, ease of folding, and high shape plasticity, which helps reduce space occupation. This invention has wide applications in the field of antenna technology.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and in particular to a dual-frequency fabric antenna based on multimode resonance technology. Background Technology

[0002] With the development of wireless communication technology, antennas face higher requirements for multi-mode performance. Moreover, with the widespread application of wearable devices, the space occupied by antennas also needs to be reduced. Current multi-mode antennas have relatively limited frequency bands and narrow bandwidths, making it difficult to meet the frequency band requirements of new wireless communication protocols (such as Wi-Fi), and also making it difficult to balance performance in terms of mode, bandwidth, and space occupation. Summary of the Invention

[0003] In view of the technical problems of current antennas that are difficult to balance performance in terms of mode, bandwidth and space occupation, the purpose of this invention is to provide a dual-band fabric antenna based on multi-mode resonance technology.

[0004] This invention includes a dual-band fabric antenna based on multi-mode resonance technology, wherein the dual-band fabric antenna based on multi-mode resonance technology comprises:

[0005] Dielectric layer;

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

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

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

[0009] Furthermore, the fan-shaped ring patch is in the shape of a fan-shaped ring, which is obtained by chopping the corners of the basic fan shape, removing the central part, opening a fan-shaped groove, and opening a rectangular groove.

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

[0011] Furthermore, the outline of the sector groove is obtained by reducing the outline of the basic sector, and the edge of the rectangular groove is connected to the arc of the sector 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. The first grounding pin and the second grounding pin respectively pass through the dielectric layer to reach the floor.

[0013] Furthermore, the dual-band fabric antenna based on multi-mode resonance technology also includes a feed pin, which is connected to the fan-shaped ring patch and passes through the dielectric layer and the ground plane.

[0014] Furthermore, a first groove is formed in the portion of the grounding plate located around the first grounding pin, a second groove is formed in the portion of the grounding plate located around the second grounding pin, and a coplanar waveguide structure is provided in the grounding plate at the position corresponding to the feed pin.

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

[0016] The parasitic square patch is disposed 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 separate from the sector ring patch;

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

[0018] Furthermore, the fan-shaped ring patch, the parasitic square patch, the first grounding pin, the second grounding pin, the third grounding pin, and the grounding plate 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-band fabric antenna based on multi-mode resonance technology in the embodiments can, on the basis of utilizing the mode of the patch itself, excite modes that are difficult to excite by the original structure by adding an additional structure, and finally achieve continuous matching bandwidth, thereby realizing a multi-mode dual-band fabric antenna and achieving bandwidth expansion; and the dual-band fabric antenna based on multi-mode resonance technology can be made of fabric material, thus having the advantages of soft and easy-to-fold fabric material, strong shape plasticity, and helping to reduce space occupation. Attached Figure Description

[0021] Figure 1 This is a flowchart illustrating the dual-band fabric antenna design method in the embodiment.

[0022] Figure 2 This is a schematic diagram of the overall structure of the dual-frequency fabric antenna based on multimode resonance technology in the embodiment;

[0023] Figure 3(a) is a partial structural schematic diagram of the dual-frequency fabric antenna based on multimode resonance technology in the embodiment;

[0024] Figure 3(b) is a dimensional schematic diagram of the structure shown in Figure 3(a);

[0025] Figure 4 This is a schematic diagram of the simulation results of the scattering parameters of the dual-frequency fabric antenna in the embodiment;

[0026] Figure 5 The normalized measured and simulated radiation patterns of the dual-band fabric antenna at 2.4 GHz (phi = 45 degrees) are shown in the example.

[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 a frequency of 2.4GHz are shown.

[0028] Figure 7 The normalized measured and simulated radiation patterns of the dual-band fabric antenna at 5.15 GHz (phi = 45 degrees) are shown in the example.

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

[0030] Figure 9 The normalized measured and simulated radiation patterns of the dual-band fabric antenna at 7.125 GHz (phi = 45 deg) are shown in the example.

[0031] Figure 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 7.125GHz are shown.

[0032] Figure 11 This is a schematic diagram showing the measured and simulated gain of the dual-frequency fabric antenna in the embodiment. Detailed Implementation

[0033] Antenna: A device used in communication to transmit or receive energy. An antenna transforms guided waves propagating on a transmission line into electromagnetic waves propagating in free space; or vice versa.

[0034] Fabric antennas: a new type of antenna that combines antenna technology with textile materials. They primarily utilize conductive fabrics, yarns, etc., to replace traditional metal materials as radiating elements and transmission lines. The conductive properties of these fabrics can be achieved by incorporating metal fibers into the textile material or by using surface coatings.

[0035] Wireless energy harvesting is a technology that harvests energy from the surrounding environment. It primarily involves receiving various wireless forms of energy, such as radio frequency (RF) signals, microwaves, light energy (e.g., solar energy), mechanical energy (e.g., vibrational energy), and heat energy, and converting this energy into electrical energy that can be stored and used by electronic devices.

[0036] Wavelength: This can be the wavelength corresponding to the center frequency of the antenna's operating band. The wavelength of the radiated signal in air can be calculated from the speed of light and the signal frequency. Specifically, air wavelength = speed of light + frequency. The speed of light is taken as 3 × 10⁻⁶. 8 m / s, frequency in MHz. The wavelength will change in the medium. Where ε r It is the relative permittivity.

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

[0038] Antenna reflection coefficient: This value characterizes the ratio of energy reflected back to the port to energy entering the antenna. In radio frequency systems, energy can be reflected due to impedance mismatch. Therefore, the port and antenna need to be impedance matched. The better the impedance matching, the smaller the antenna reflection coefficient, the more energy enters the antenna, and the higher the antenna's radiation efficiency. Conversely, the larger the antenna reflection coefficient, the less energy enters the antenna, and the lower the antenna's radiation efficiency. A simple way to represent this is by using S... 11 Numerical description, S 11 The smaller the value, the smaller the reflection coefficient.

[0039] Antenna gain is an important parameter describing antenna performance, used to measure the antenna's ability 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 radiated intensity in a given direction to that of an ideal isotropic antenna (or dipole antenna).

[0040] Antenna radiation pattern: This refers to the graph showing how the relative field strength radiated by the antenna changes with angle at a certain distance. Generally, it is characterized using two mutually perpendicular antenna radiation patterns.

[0041] Let's take Wi-Fi as an example of a wireless communication protocol. Wi-Fi energy harvesting systems provide a reliable power source for fabric electronics systems. However, current multi-band antennas have limitations in bandwidth and flexibility, failing to meet the bandwidth requirements of next-generation Wi-Fi protocols and the flexibility requirements of fabric electronics systems. To extend the bandwidth of fabric antennas, two approaches can be considered: parasitic resonant structure loading and multimode technology. While parasitic resonant structure loading can effectively extend the bandwidth, it typically leads to an increase in antenna size, limiting its application in wearable devices. Therefore, a multimode solution that does not require additional space can be used.

[0042] When employing a multimode approach, multimode performance can be achieved by using two resonant modes across two frequency bands. For example, this can be achieved by combining TM on the same structure. 10 and TM 02 By employing resonant modes and a U-shaped slot, the antenna achieves dual-band operation and high out-of-band rejection. Furthermore, auxiliary structures such as short-circuited circular patches can be added to excite modes that were previously unexcited, thus enabling dual-band bandwidth coverage using both omnidirectional and unidirectional modes.

[0043] Based on the above principles, in this embodiment, the following can be used: Figure 1 The dual-band fabric antenna design method shown herein aims to address the shortcomings of current antennas, such as limited bandwidth, single frequency band, and large space occupation. The design process of the dual-band fabric antenna is as follows: Figure 1 As shown. (Refer to...) Figure 1 The design process for a dual-band fabric antenna includes:

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

[0045] (2) Introduce a short-circuit structure at a suitable location in the original structure to increase the short-circuit mode;

[0046] (3) Further cut the structure with grooves of a specific shape;

[0047] (4) Improve matching and adjust the resonant frequency to a suitable level by loading the chamfer and parasitic structure;

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

[0049] pass Figure 1 The dual-band fabric antenna design method shown can be used to design antennas such as... Figure 2 The image shows a dual-band fabric antenna based on multimode resonant technology. (Refer to...) Figure 2 The dual-band fabric antenna based on multimode resonance technology includes a dielectric layer, a fan-shaped ring patch, a ground plane, and a capacitive ground pin.

[0050] Reference Figure 2 The dielectric layer has two sides. The fan-shaped ring patch is placed on one side of the dielectric layer, and the ground plane is placed on the other side of the dielectric layer. The capacitive ground pin passes through the dielectric layer to couple the fan-shaped ring patch and the ground plane.

[0051] Reference Figure 2 As shown in Figure 3(a), the shape of the fan-shaped ring patch is a fan-shaped ring. Referring to Figure 3(a), it can be obtained by cutting off two corners of the basic fan (the intersection of one radius of the basic fan and the arc) and removing the central part (a part extending from the center towards the arc, which can be fan-shaped or rectangular, etc.) from a basic fan (a complete fan containing two radii and one arc), and then cutting out a fan-shaped groove and a rectangular groove in the remaining part.

[0052] In this embodiment, when fabricating the fan-shaped ring patch, the material for the fan-shaped ring patch can first be made into a basic fan shape. Then, through processes such as chopping corners, removing the central part, creating fan-shaped grooves, and creating rectangular grooves, some material is removed, and the remaining material forms the fan-shaped ring patch. Alternatively, after determining the shape of the fan-shaped ring patch through virtual shape design, the material can be directly assembled into the fan-shaped ring patch using technologies such as 3D printing.

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

[0054] In this embodiment, refer to Figure 2 As shown in Figure 3(a), the edge of the rectangular groove connects to the arc of the sector groove, and the rectangular groove is located at the midpoint of the arc of the sector groove.

[0055] In this embodiment, refer to Figure 2 As shown in Figure 3(a), the dual-band fabric antenna based on multimode resonance technology has a first ground pin and a second ground pin. The first ground pin is connected to one end of the inner diameter of the fan-shaped ring patch, and the second ground pin is connected to the other end of the inner diameter of the fan-shaped ring patch. The first ground pin and the second ground pin pass through the dielectric layer to reach the ground plane. (Refer to...) Figure 2 As shown in Figure 3(a), a first groove is formed on the part of the floor around the first grounding pin, and a second groove is formed on the part of the floor around the second grounding pin. The first groove and the first grounding pin are combined, and the second groove and the second grounding pin are combined to form a capacitive grounding pin.

[0056] In this embodiment, refer to Figure 2As shown in Figure 3(a), the dual-band fabric antenna based on multimode resonance technology has a feed pin, which is connected to a fan-shaped ring patch. The feed pin passes through the dielectric layer and the ground plane. A coplanar waveguide (CPW) structure is provided on the ground plane at the corresponding position of the feed pin. The feed 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 patch of the same position, material, and shape as the basic fan-shaped patch, then this basic fan-shaped patch has three modes when fed. In this embodiment, the dual-band fabric antenna based on multi-mode resonance technology, with its capacitive grounding pin and structural improvements to the fan-shaped ring patch compared to the basic fan-shaped patch, is equivalent to adding an additional structure to the basic fan-shaped patch. Therefore, based on the first three modes of the basic fan-shaped patch, additional structures can be added to excite modes that are difficult to excite with the original structure, ultimately achieving continuous matching bandwidth. Specifically: by using the fan-shaped ring patch (equivalent to the basic...), By processing the fan-shaped patch by chopping corners, removing the center portion, and creating fan-shaped and rectangular slots, the basic fan-shaped patch can be transformed into a fan-shaped ring patch, which can generate a rectangular patch 3 / 2λ mode. By adding a first ground pin and a second ground pin to both ends of the inner diameter of the fan-shaped ring patch, and combining them with the slots on the ground to form capacitive ground pins, a short-circuit mode can be added to the structure. The above improvements enable a multi-mode dual-band fabric antenna, thereby achieving bandwidth expansion. Furthermore, the dual-band fabric antenna based on multi-mode resonance technology can be manufactured using fabric materials, thus possessing the advantages of soft and easily foldable fabric materials, strong shape plasticity, and the ability to reduce space occupation.

[0058] In this embodiment, refer to Figure 2 As shown in Figure 3(a), the dual-band fabric antenna based on multimode resonance technology includes a parasitic square patch and a third grounding pin. The parasitic square patch is located on one side of the dielectric layer, which is the same side as the fan-shaped ring patch. The parasitic square patch is positioned at the center of the basic fan shape; for example, the center of the parasitic square patch coincides with the center of the basic fan shape. The parasitic square patch is separate from the fan-shaped ring patch, meaning they are insulated from each other.

[0059] In this embodiment, refer to Figure 2 As shown in Figure 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 ground plane, thereby connecting the third ground pin to the parasitic square patch.

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

[0061] In this embodiment, conductive materials such as conductive cloth can be used to fabricate conductive structures such as fan-shaped ring patches, parasitic square patches, first ground pins, second ground pins, third ground pins, and ground planes. The conductive cloth is woven from silver-plated nickel fiber threads.

[0062] In this embodiment, materials such as wool felt can be used to fabricate the dielectric layer. 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, the dimensions of each part in the structure shown in Figure 3(a) are as shown in Figure 3(b), and their 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 simulation results of the dual-band fabric antenna based on multimode resonance technology shown in Figure 3(b) are as follows: Figures 4 to 11 As shown.

[0065] The simulation results of the scattering parameters are as follows: 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 , Figure 9 and Figure 10The normalized measured and simulated radiation patterns of the antenna's E-plane (phi = 45deg) and H-plane (phi = -45deg) are shown at three frequency points: 2.4 GHz, 5.15 GHz, and 7.125 GHz. Figure 11 The measured and simulated gains of the antenna 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 high gain indicates that it is well-suited for wireless energy harvesting.

[0066] according to Figures 4 to 11 The simulation results show that the dual-frequency fabric antenna based on multimode resonance technology in this embodiment can achieve satisfactory results in terms of scattering parameters, radiation pattern and gain.

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

[0068] 1. By introducing a sector ring patch, capacitive ground pin, slot and parasitic patch, and by reasonably optimizing the size, the resonant frequencies of the three modes of the sector ring patch (corresponding to the initial structure, that is, the basic sector patch) and the modes 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. The capacitive grounding pin can introduce TM at a suitable frequency without disrupting the original mode. 0，1 / 2 model;

[0070] 3. Sector-shaped patch panels can be constructed by adding sector-shaped and rectangular slots to a basic sector-shaped (1 / 4 sector) patch panel, while maintaining the original TM of the basic sector-shaped patch panel. 11 TM 21 TM 12 Under the premise of the pattern, introduce a new TM 20 The mode utilizes a variety of resonant modes, which can provide an extremely wide bandwidth within a limited size;

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

[0072] 5. Adjusting the size and position of the antenna radiating element 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 using conductive cloth and wool felt and other fabric materials, it has low production costs and can maintain stable performance such as scattering parameters even when carried by the human body or bent.

[0074] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," and "right" used in this disclosure are only relative to the relative positional relationships of the components of this disclosure in the accompanying drawings. The singular forms "a," "an," and "the" used in this disclosure are also intended to include the plural forms, unless the context clearly indicates otherwise. Moreover, unless otherwise defined, all technical and scientific terms used in this embodiment have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this embodiment specification is only for describing particular embodiments and is not intended to limit the invention. The term "and / or" as used in this embodiment includes any combination of one or more of the associated listed items.

[0075] It should be understood that although the terms first, second, third, etc., may be used to describe various elements in this disclosure, these elements should not be limited to these terms. These terms are only used to distinguish elements of the same type from each other. For example, a first element may also be referred to as a second element without departing from the scope of this disclosure, and similarly, a second element may also be referred to as a first element. The use of any and all instances or exemplary language (“e.g.,” “such as,” etc.) provided in this embodiment is intended only to better illustrate embodiments of the invention and, unless otherwise required, does not impose a limitation on the scope of the invention.

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

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

[0078] Furthermore, the method can be implemented in any suitable type of computing platform, including but not limited to personal computers, minicomputers, mainframes, workstations, networked or distributed computing environments, standalone or integrated computer platforms, or in communication with charged particle tools or other imaging devices, etc. Aspects of the invention can be implemented as 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, optical read and / or write storage medium, RAM, ROM, etc., such that it is readable 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 processes described herein. Furthermore, the machine-readable code, or portions thereof, can be transmitted via wired or wireless networks. The invention of this embodiment includes these and other different types of non-transitory computer-readable storage media when such media comprises instructions or programs that implement the steps above in conjunction with a microprocessor or other data processor. When programmed according to the methods and techniques of the invention, the invention also includes the computer itself.

[0079] A computer program can be applied to input data to perform the functions of this embodiment, thereby transforming the input data to generate output data stored in 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 invention, the transformed data represents physical and tangible objects, including specific visual depictions of physical and tangible objects generated on the display.

[0080] The above are merely preferred embodiments of the present invention. The present invention is not limited to the above-described embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention, as long as they achieve the technical effects of the present invention by the same means, should be included within the scope of protection of the present invention. Within the scope of protection of the present invention, the technical solutions and / or implementation methods can have various modifications and variations.

Claims

1. A dual-band 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; A sector-shaped ring patch; the sector-shaped ring patch is disposed on one side of the dielectric layer; the sector-shaped ring patch is shaped like a sector ring, which is obtained by chopping corners of a basic sector, removing the center part, opening a sector groove and an rectangular groove, the basic sector being a 1 / 4 sector, the outline of the sector groove being obtained by reducing the outline of the basic sector, and the side of the rectangular groove connecting to the arc of the sector groove; Floor; the floor is disposed on the other side of the medium layer; A capacitive grounding pin; the capacitive grounding pin passes through the dielectric layer to couple the sector ring patch and the ground plane; 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 sector ring patch, and the second grounding pin is connected to the other end of the inner diameter of the sector ring patch, the first grounding pin and the second grounding pin respectively pass through the dielectric layer to reach the ground plane.

2. The dual-band fabric antenna based on multi-mode resonance technology according to claim 1, characterized in that, The dual-band fabric antenna based on multi-mode resonance technology also includes a feed pin, which is connected to the fan-shaped ring patch and passes through the dielectric layer and the ground plane.

3. The dual-frequency fabric antenna based on multi-mode resonance technology according to claim 2, characterized in that, The portion of the ground plane surrounding the first grounding pin has a first slot, and the portion of the ground plane surrounding the second grounding pin has a second slot. A coplanar waveguide structure is provided on the ground plane at the position corresponding to the feed pin.

4. The dual-band fabric antenna based on multi-mode resonance technology according to claim 1, characterized in that, The dual-frequency fabric antenna based on multi-mode resonance technology also includes a parasitic square patch and a third grounding pin; The parasitic square patch is disposed 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 separate from the sector ring patch; The third grounding pin is connected to the parasitic square patch, and the third grounding pin passes through the dielectric layer to reach the ground plane.

5. The dual-band fabric antenna based on multi-mode resonance technology according to claim 4, characterized in that, The fan-shaped ring patch, the parasitic square patch, the first grounding pin, the second grounding pin, the third grounding pin, and the floor are all made of conductive cloth.

6. The dual-band fabric antenna based on multi-mode resonance technology according to claim 5, characterized in that, The medium layer is made of wool felt.

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