42 results about "Wearable antennas" patented technology

The invention provides a dual-band wearable antenna with switchable working modes, and belongs to the technical field of antennas. The adopted technical scheme is that the dual-band wearable antenna comprises upper and lower layers of dielectric substrates. A radiation patch is arranged at the upper surface of the upper layer substrate. A grounding plate is arranged at the lower surface of the lower layer substrate. The radiation patch and the grounding plate are connected by segmented metalized through holes. Symmetrically distributed rectangular grooves are arranged at the left and right sides of the metal radiation patch. The segmented metalized through holes are connected by a segment of conductor strip. The antenna adopts a coaxial probe for direct feed. A coaxial internal conductor extends to the radiation patch from the grounding plate. A circle of circular groove is etched around a feeding point so as to increase inductive reactance, and thus impedance matching is facilitated. Problems in the prior art that the wearable antenna cannot meet the requirements of people for miniaturization, integration and wearing facilitating are mainly solved by the dual-band wearable antenna with the switchable working modes.

A wearable article of clothing and the like is configured to be worn by a person underwater or underground; An antenna. with at least one loop, is coupled to the wearable item. The antenna provides transmission or receipt of electromagnetic signals and has a size and geometry that maximizes antenna transmission area while minimizing a restriction on movement by the person wearing the wearable article. The antenna carries an alternating current that provides conductive attenuation and has three different field components. Each field component has a different geometric loss when moving a distance r from the antenna. R is a propagating distance from the antenna.

A dual polarized dipole wearable antenna may be embedded within a shirt or / and outfit, placed at a range of up to few millimeters from the body of a user in which there is a transmitting swallowable imaging device. The antenna is constructed of three conducting layers: radiating layer, feed network layer and ground layer. The conducting layers may be separated by two dielectric substrate layers. Feed network layer may receive and transmit horizontally polarized signals. The feed network layer consists of a main stripe comprising a plurality of substantially straight sections parallel to each other with a plurality of stubs protruding from them. The longitudinal stripes may be connected to each other via substantially right angled bands, thus creating a continuous stripe. The radiating layer may substantially take the form of two continuous and parallel strips banded at right angles having a slot or a gap there between. When placed one on top of the other, the parallel strips of the radiating layer are disposed against the longitudinal strip of the feed network layer, and the stubs of the feed network layer are disposed across the slot of the radiating layer. The slot of the radiating layer may be excited by radiation from, and be in interaction with the stubs of the feed network layer to receive and transmit vertically polarized signals.

The invention discloses a circularly polarized wearable antenna based on a graphene flexible conductive film, and mainly solves the problems that an existing wearable antenna is excessively heavy anddifficult to circularly polarize. The circularly polarized wearable antenna comprises a radiation unit (1), a medium supporting layer (2) and an artificial magnetic conductor reflecting surface (3); the antenna is integrally arranged on the artificial magnetic conductor structure, so that backward radiation is isolated from a human body by an artificial magnetic conductor, and the safety of humantissues is ensured; the radiation unit is placed on the artificial magnetic conductor at an oblique angle of 45 degrees, so that electromagnetic waves of forward radiation and electromagnetic waves reflected by the artificial magnetic conductor act together to form a working mode of circular polarization of the antenna; and a flexible dielectric slab is used as a substrate of the radiation unit and the reflection surface of the artificial magnetic conductor, and the graphene conductive film is used as a conductor material of the radiation unit and the reflection surface of the artificial magnetic conductor, so that the flexible characteristics of the antenna are guaranteed, and the weight of the antenna is reduced. The wearable antenna can be used in a human body wireless communication system.

The invention discloses a wearable omnidirectional / directional pattern reconfigurable antenna. The antenna is formed by an antenna array and a feed network layer thereof, a bistable composite material substrate, a jumping drive, and a grounding plate, wherein the antenna array and the feed network thereof are positioned at the upper layer of the bistable composite material substrate, the jumping drive is embedded into the intermediate layer of the bistable composite material substrate, and the grounding plate is positioned at the bottom layer of the bistable composite material substrate. According to the antenna, antenna pattern omnidirectional / directional reconfiguration is realized by employing two stable configurations of the bistable composite material substrate, and the conversion of the two stable configurations can be realized via the jumping drive; and compared with the conventional wearable antenna, the structure and the design are simple, the antenna and the human body can easily have the same shape, the pattern is reconfigurable, and the antenna is multifunctional and can be applied to the fields of personal wearable mobile communication and field severe environment communication.

A wearable antenna is described, for wirelessly receiving sensor data generated by an implantable sensor device implanted in a uterus, the wearable antenna, in use, extending around the waist of the wearer's body, and having a downwardly extending portion for location at the front of the wearer's body. In this way, an improved electromagnetic interaction between the wearable antenna and the implantable sensor can be achieved. Further, the wearable antenna may have an undulating shape around at least a portion of the wearer's waist, to permit expansion and contraction of the wearable antenna about the wearer's waist.

The invention discloses a UWB wearable antenna which comprises a substrate, a multi-gap patch, an inclined rectangular slit, a right rectangular patch, a left rectangular patch, a rectangular gap ground plate and a lower rectangular slit; the multi-gap patch, the right rectangular patch and the left rectangular patch are positioned in the front side of the substrate, the left rectangular patch andthe right rectangular patch are arranged in the left and right sides of the multi-gap patch respectively, and the inclined rectangular slit is positioned in an intermediate lower position of the multi-gap patch; and the rectangular gap ground plate is positioned in the back side of the substrate, and the lower rectangular slit is positioned in an intermediate lower position of the rectangular gapground plate. The UWB wearable antenna has the advantages including simple structure, wide frequency band, high radiation characteristic and low cost, and can satisfies the application requirements of the field of wearable wireless communication.

The invention discloses a polarized antenna with a reconfigurable directional diagram, and belongs to the technical field of antennas. The antenna comprises an upper-layer dielectric plate, a metal pillar, a lower-layer dielectric plate, a circular antenna, a fan-shaped metal patch and a metal ground, the circular antenna is printed on the upper surface of the upper-layer dielectric plate and is provided with feed ports at the angles of alpha, alpha + 90 degrees, alpha + 180 degrees and alpha + 270 degrees, the circle center of the upper-layer dielectric plate and the circle center of the lower-layer dielectric plate are located on the same axis, the distance between the upper-layer dielectric plate and the lower-layer dielectric plate is 1 mm, the upper-layer dielectric plate and the lower-layer dielectric plate are connected with the feed port through metal supporting columns, four fan-shaped metal patches are printed on the upper surface of the lower-layer dielectric plate, and a metal ground is printed on the lower surface of the lower-layer dielectric plate. According to the antenna, the profile of the antenna can be greatly reduced, the requirement for miniaturization of the wearable antenna is met, and polarization reconfiguration and directional diagram reconfiguration are achieved.

The invention relates to a processing method of a wearable antenna, belonging to the technical field of antennas. The invention adopts high molecular polymer as the dielectric base material of wearable antenna, Conductive silver paste is selected as the conductive material of wearable antenna, which is realized by screen printing technology. The wearable antenna has the characteristics of lightness, comfort, high electrical performance, bending resistance, easy processing, low cost and high repeatability, and can be widely used in transmitting and receiving application scenes of wearable antenna.

The invention discloses a double-frequency-band wearable antenna which comprises a substrate, an octagonal patch, a circular slit and a rectangular ground plate; the octagonal patch is positioned in the front side of the substrate, and the circular slit is positioned in an intermediate lower position of the octagonal patch; and the rectangular ground plate is positioned in the back side of the substrate. The double-frequency-band wearable antenna has the advantages including simple structure, wide frequency band, high radiation characteristic and low cost, and can satisfies the application requirements of the field of wearable wireless communication.

A body-wearable antenna system is described that comprises at least two antenna elements (2, 4) arranged to be mountable in a substantially equi-spaced distributed array around a user's body. Each antenna element is a directional type antenna and the antenna system is configurable such that when worn the antenna elements operate in phase to deliver a combined, higher gain, omnidirectional performance radiating away from the user's body, compared to one or more conventional body-worn omnidirectional antennas. The antenna system can operate in transmit and receive. Each antenna element may be a planar inverted-F antenna (PIFA) housed in a protective radome (3, 5). Each PIFA may feature at least one slot cut into the radiating top plate or at least one parasitic radiator, or a combination of both, to allow operation within distinct frequency bands and with predetermined impedance bandwidth.

The invention provides a surface-radiation coupled five-band wearable antenna. The wearable antenna comprises a first radiant surface, second radiant surfaces, a substrate and a ground plate, wherein the first radiant surface carries out feed directly; the second radiant surfaces are grounded to form parasitic short circuit bands, so that the band of the antenna can be broadened; a radiation patch is arranged on the upper surface of the substrate; the ground plate is arranged on the lower surface of the substrate. The wearable antenna has the beneficial effects that the wearable antenna adopts the patch type and button connection, thus increasing the possibility of reconfigurable antennas; the substrate adopts the latex material, thus improving the stability of the antenna during wearing; the wearable antenna has small size, covers five bands, satisfies the need for stabilityto some extent and is applicable at present.

The invention discloses a wearable shunt-fed antenna which is applied to a 2.4GHz frequency band and is of an inverse-F-shaped structure. The antenna of the invention includes a dielectric substrate composed of wearable common fabrics, a ground surface which is arranged at the lower surface of the dielectric substrate and is composed of conductive fabric materials, as well as monopole radiating units and a feeder line which are arranged at the upper surface of the dielectric substrate; the monopole radiating units are symmetrically arranged at two sides of the feeder line which is vertical to the monopole radiating units; two sides of the feeder line are symmetrically provided with short-circuiting microstrip lines for connecting short-circuiting probes and the monopole radiating units; and the short-circuiting microstrip lines are vertical to the monopole radiating units. The wearable shunt-fed antenna has the advantages of high gain of an array antenna and stable frequency of a plane inverse-F-shaped antenna. The wearable shunt-fed antenna can be suitably adopted as a wearable antenna.

A feed structure for a wearable antenna incorporates a microstrip transmission line designed for mounting on opposite sides of a fabric. The transmission line has a perforated ground plane which reduces capacitance and offers an appropriate impedance, even when the fabric is thin, and allows the use of a relatively robust line conductor having a width of 3 mm or 5 mm or more. The ground plane can be extended to provide the ground plane of a balun and the material of that ground plane can in turn be extended to provide the wearable antenna.

The invention discloses a wearable VHF-band fractal oscillator antenna for marine search and rescue, which comprises a flake V-shaped structure, an equivalent grounding surface and a feeding point arranged between the flake V-shaped structure and the equivalent grounding surface, wherein the flake V-shaped structure comprises two first branches with the same length, the two first branches are crossed to form a V shape, and second branches extend from the middle points of the two first branches. The size of the antenna structure is small, the weight is light, and an opening structure is introduced to the antenna, the area of the antenna with the opening structure is nearly 70% smaller than that of an antenna without an opening structure; the wearable antenna is perfectly conformal with a human body, and the use is convenient and comfortable; a marine single person search and rescue system based on the antenna structure of the invention can effectively overcome shortcomings that the traditional maritime search and rescue system is large in size and large in weight; and the application space is large in marine search and rescue, in particular, marine single person search and rescue.

The invention discloses a design method of a wearable microwave detecting antenna and an antenna array based on medical images. Medical requirement information is extracted according to the obtained medical images of the body part to be detected, and the wearable microwave detecting antenna and the antenna array are designed. The information extracted from nuclear magnetic resonance images includes but is not limited to the distribution of various kinds of tissue and the position and size of a detection target; the information extracted from three-dimensional scanned images includes but is notlimited to the shape and size of a human body surface area. According to the extracted information, the optimal path and detection frequency of microwave detection and the position and size of a placement area of the wearable microwave antenna and the antenna array are determined. Screening is conducted in a pre-designed antenna library, a user selects and optimizes screening results according topersonal preferences, and a solution for manufacturing the wearable antenna and the antenna array is generated. In this way, the wearable microwave detecting antenna and the antenna array which meetthe function and size requirements of individual characteristics of the user and satisfy the preference of the user can be designed.

The invention relates to a low-cost embedded wearable antenna, which comprises a radiation patch (3), a strip line (4), a ground plane (5), an upper PDMS dielectric substrate and a lower PDMS dielectric substrate. The antenna adopts a coplanar waveguide feeding mode for feeding, namely the ground plane (5), the radiation patch (3) and the strip line (4) are positioned on the same plane; and the radiation patch, the ground plane and the strip line are embedded into the upper PDMS dielectric substrate and the lower PDMS dielectric substrate to form an embedded structure. The center frequency ofthe antenna is 5.8 GHz, the reflection coefficient at the resonant frequency is-26.20 dB, the working bandwidth is 5.25-10.54 GHz, and the antenna can be used for medical service at the frequency bandof 5.725-5.875 GHz. The low-cost embedded wearable antenna has the characteristics of ultra-wideband characteristic and the like, and is higher in stability, lower in cost and more convenient to process.

The invention discloses a high-performance wearable AIS antenna. The antenna comprises: a flexible circuit board which is used for providing an installation surface; a dipole antenna used for communication; a dipole antenna attached to the installation surface; a bending matching balun line used for improving impedance matching of the dipole antenna, wherein the bending matching balun line is arranged in a manner of surrounding the dipole antenna; and a radio frequency coaxial line used for feed excitation of the dipole antenna. The radio frequency coaxial line is respectively connected with the flexible circuit board, the dipole antenna and the bending matching balun line. According to the invention, the dipole antenna is loaded on the flexible circuit board, and the AIS antenna can be flexibly bent, thereby facilitating the wearing of a human body. By designing the bending matching balun line, impedance matching of the dipole antenna is improved, and the influence of a human body and equipment on the antenna performance is eliminated; and a hollow area is formed at the radiation tail end of the antenna radiation pole, an electric field transmission path is extended, the equivalent physical wavelength of the AIS antenna is increased, and the size of the antenna is effectively reduced.

The invention discloses a fabric metamaterial reflecting surface used closing to a human antenna. The fabric metamaterial reflecting surface used closing to the human antenna comprises a conductive fiber upper surface, a common fabric fiber material medium and a conductive fiber material floor; and the conductive fiber upper surface is composed of plurality rows and columns of concentric-square-shaped conductive fiber patches. Due to using fabric and conductive fiber materials, the fabric metamaterial reflecting surface used closing to a human antenna can be integrated into a position in the clothing where a wearable antenna is required. After using the fabric metamaterial reflecting surface disclosed in the invention, the radiation specific absorption rate of the wearable antenna to the human body is greatly reduced, and at the same time, the antenna gain is significantly improved in the direction away from the human body.

The invention belongs to the technical field of a wearable antenna and particularly relates to a double-loop antenna applied to 4G-MIMO intelligent glasses. The antenna is characterized in that the shape of the glasses is fully utilized, the loop antenna is printed on a glasses frame, and an MIMO antenna structure is formed according to the symmetry performance of the glasses; coverage of frequency bands of GSM850 / 900, GSM1800 / 1900, UMTS2100, LTE2300 / 2500 and the like is realized by loading a matching circuit; furthermore, by loading a decoupled parasitic element, near-field coupling between two antennas is effectively reduced, so minimum isolation of two antennas at a low frequency band also reaches -15dB or below; moreover, introduction of the decoupling parasitic element has little influence on self-impedance of the antenna, and the bandwidth can still cover two frequency bands of 824-960 MHz and 1710-2690 MHz of 4G, and thereby the double-loop antenna not only conforms to the application of the intelligent glasses, but also meets the decoupling requirement.

A wearable antenna is described, for wirelessly receiving sensor data generated by an implantable sensor device implanted in a uterus, the wearable antenna, in use, extending around the waist of the wearer's body, and having a downwardly extending portion for location at the front of the wearer's body. In this way, an improved electromagnetic interaction between the wearable antenna and the implantable sensor can be achieved. Further, the wearable antenna may have an undulating shape around at least a portion of the wearer's waist, to permit expansion and contraction of the wearable antenna about the wearer's waist.

The invention discloses a wearable fabric antenna applied to a WLAN. According to the wearable fabric antenna, a top surface is located right above the front half part of a bottom surface; a dielectric substrate covers the bottom surface; a conductive side wall consists of a left conductive side wall, a front conductive side wall and a right conductive side wall; the left conductive side wall and the right conductive side wall are respectively connected to the left part and the right part of the upper surface of the dielectric substrate; the front conductive side wall is connected to the front part of the upper surface of the dielectric substrate, and two ends of the front conductive side wall are respectively connected with the front ends of the left conductive side wall and the right conductive side wall; the top surface is connected with the upper end of the conductive side wall and defines a cavity together with the dielectric substrate and the conductive side wall; the lower end of a feed probe is in insulated connection with the upper surface of the dielectric substrate, and the upper end of the feed probe is connected with the top surface; metal copper columns are composed of a left front metal copper column, a left rear metal copper column, a right rear metal copper column and a right front metal copper column, the left rear metal copper column and the right rear metal copper column are located on the rear portion of the middle part of the cavity, and the left front metal copper column and the right front metal copper column are located in the middle of the cavity; and the metal copper columns are respectively connected with the bottom surface and the top surface. The antenna of the invention is simple in structure, small in size and wide in bandwidth.

The invention relates to a wearable antenna which comprises clothes and an antenna assembly arranged in an interlayer of the clothes, the antenna assembly comprises a forward antenna, a backward antenna and a feed network, and the feed network is connected with the forward antenna and the backward antenna and used for feeding the forward antenna and the backward antenna; the forward antenna is arranged in a first area of the clothes, the backward antenna is arranged in a second area of the clothes, when the clothes are worn by a user, the first area is located on the front side of the body of the user, and the second area is located on the rear side of the body of the user. In the embodiment of the invention, the wearable antenna is arranged in the clothes interlayer of the clothes, so that the wearable antenna is convenient to wear by a user, is high in concealment, is convenient for unfolding tactical actions of the user, and is high in advancing trafficability.

The invention discloses a broadband omnidirectional wearable antenna based on graphite and a preparation method thereof. Based on high conductivity, bendability, physical and chemical stability and the like of graphite, the invention provides a graphite antenna working in an industrial scientific medical frequency band (ISM frequency band). The antenna has the advantages of being low in profile, wide in band, omnidirectional in radiation, capable of being attached to the surface of a human body and the like, a coplanar waveguide structure is adopted, the antenna is provided with a graphite radiation top layer structure and a braided fabric substrate structure, and SMA feed is adopted. The graphite radiation structure is formed by combining a plurality of equilateral triangles, and is simple in structure and easy to design and manufacture; the braided fabric substrate structure is made of common cloth and can be in direct contact with the skin of the human body. The antenna can be used for indoor positioning application, motion data monitoring and other scenes, and is an important part of intelligent wearable equipment in the future.

The invention belongs to the technical field of wearable antennas, and in particular relates to a double-loop antenna applied to 4G-MIMO smart glasses. MIMO antenna structure; the present invention realizes coverage of frequency bands such as GSM850 / 900, GSM1800 / 1900, UMTS2100 and LTE2300 / 2500 by loading a matching circuit; further, the present invention effectively reduces two antennas by loading a decoupled parasitic element The near-field coupling between the two antennas makes the minimum isolation of the two antennas in the low frequency band reach below ‑15dB; moreover, the introduction of decoupling parasitic elements has little effect on the self-impedance of the antenna itself, and the bandwidth can still cover the two sides of 4G. frequency bands 824‑960MHz and 1710‑2690MHz. It can be seen that the double-loop antenna of the present invention not only meets the application of smart glasses, but also meets the requirement of decoupling.

The invention relates to a graphene-based flexible broadband monopole wearable antenna, comprising: a flexible dielectric substrate, a common ground structure and a radiation unit arranged on the flexible dielectric substrate, wherein the common ground structure is located above the radiation unit, The electrical network is connected with the radiation unit, and the common ground structure is used to widen the working bandwidth of the wearable antenna; the radiation unit is in the form of a plane monopole, including the feeding conductive strips connected in sequence, the first transition connection part, the rectangular slot antenna part, the second Transition connection part and U-slot antenna part. The graphene-based flexible broadband monopole wearable antenna of the present invention bends the radiation patch part in the form of a monopole antenna, and forms a rectangular slot and a U-shaped slot for the antenna, which prolongs the current path and increases the antenna power. length, so as to realize the broadband and miniaturization characteristics of the antenna. The common ground structure broadens the working bandwidth of the wearable antenna, thereby broadening the application prospect of the wearable antenna.