12 results about "Wearable antennas" patented technology

The invention discloses a high-gain circularly-polarized ultra-wideband flexible wearable SIW antenna array and application thereof, and belongs to the field of wearable antennae, the high-gain circularly-polarized ultra-wideband flexible wearable SIW antenna array comprises a central array element and a plurality of circumferential array elements which are uniformly distributed around the central array element in a circumferential array, and the central array element and the circumferential array elements form a symmetrical arrangement structure. The overall gain of the array is improved through the superimposed effect of the radiation energy of the array elements; meanwhile, a rotary feeding mode is adopted for the center array element and all the circumferential array elements, the excitation amplitudes of the center array element and the circumferential array elements are kept consistent in the feeding process, and excitation phases are distributed in a preset gradient mode. By adopting the high-gain circularly-polarized ultra-wideband flexible wearable SIW antenna array and the application thereof, the antenna array has the characteristics of ultra wideband, circular polarization, miniaturization and high-gain directional radiation; high-speed data transmission and effective transmission and receiving of in-vitro long-distance signals can be realized, the problem of polarization mismatch in a dynamic scene is relieved, seamless integration of clothes is facilitated, and stable performance can still be kept under the influence of human body load.

The application relates to the technical field of wearable antennas, in particular to a metal frame smart watch antenna based on a double-feed technology, which comprises a metal frame, a metal ground plate, a parasitic metal, a first feed port, a second feed port, a feed source, a power divider and a phase shifter; the feed source forms two feed paths through the power divider, one of which feeds into the first feed port, and the other feeds into the second feed port through the phase shifter. The antenna can be configured to connect a slot antenna to the first feed port and connect a patch antenna to the second feed port so that the two antennas work simultaneously, or configured to connect the two feed ports to the same patch antenna so that the patch antenna generates a double mode. The scheme is favorable for improving the low-frequency antenna efficiency, improving the bandwidth performance, and realizing double-feed work under the condition of a single excitation source.

The application discloses a kind of dual-frequency wearable antenna based on substrate integrated waveguide, including dielectric substrate, bottom ground layer, radiating patch, and multiple metallized through holes, through the dielectric substrate, and electrically connected the outer edge of radiating patch and bottom ground layer, to form a semi-open resonant cavity by enclosing;Wherein, at least one asymmetric slot is opened on radiating patch;Semi-open resonant cavity and bottom ground layer jointly suppress backward radiation towards human direction, and when antenna is attached to human body, the dielectric constant difference between human tissue and dielectric substrate forms dielectric reflection interface, at least part of backward electromagnetic energy is redirected to away from human direction, to enhance the radiation gain of antenna in away from human direction.The present application converts human tissue into auxiliary reflection structure, realizes gain enhancement under the condition of body, rather than attenuation, effectively solves the problem of traditional wearable antenna close to human body after radiation efficiency and gain decline.

The application discloses a high-gain circularly polarized ultra-wideband flexible wearable SIW antenna array and application thereof, and belongs to the field of wearable antennas. The application comprises a central array element and a plurality of circumferential array elements uniformly distributed in a circumferential array around the central array element. The central array element and the circumferential array elements form a symmetrical arrangement structure to improve the overall gain of the array through the superposition effect of the array element radiation energy. Meanwhile, a rotating feeding mode is adopted for the central array element and all the circumferential array elements. During the feeding process, the excitation amplitudes of the central array element and the circumferential array elements are kept consistent, and the excitation phases are in a preset gradient distribution. The high-gain circularly polarized ultra-wideband flexible wearable SIW antenna array and application thereof have the characteristics of ultra-wideband, circular polarization, miniaturization and high-gain directional radiation, and can realize high-speed data transmission, effective transmission and reception of external long-distance signals, alleviate polarization mismatch problems in dynamic scenes, facilitate seamless integration of clothing, and still maintain stable performance under the influence of human body load.

A flexible composite substrate for a wearable antenna includes a fabric sheet and a single-layer dielectric film immersed into the fabric sheet. The single-layer dielectric film includes a dielectric resin matrix and a low dielectric loss material which is mixed with the dielectric resin matrix and which serves as a wireless functional dielectric interface material.

The invention relates to a multi-band high-gain low-specific-absorption-rate wearable antenna based on an AMC. The multi-band high-gain low-specific-absorption-rate wearable antenna comprises a multi-band antenna fed by a coplanar waveguide, an AMC reflecting plate and a spacing layer, the multi-band antenna comprises a first dielectric substrate, a coplanar structure arranged on the first dielectric substrate, and a plurality of radiation branches connected with the coplanar structure. The AMC reflecting plate is composed of AMC reflecting modules based on a plurality of arrays; the AMC reflection module comprises a second dielectric substrate, a radiation assembly and a grounding plate, wherein the radiation assembly and the grounding plate are arranged on the two opposite sides of the second dielectric substrate respectively. The radiation assembly has in-phase reflection phase bandwidth covering all working frequency bands of the multi-frequency-band antenna; the radiation assembly comprises a plurality of radiation rings; on the side face of the second dielectric substrate, the multiple radiation rings are sequentially arranged from inside to outside in the radial direction, and the two radiation rings closest to the center are connected with each other. The wearable antenna of the scheme has more excellent gain and unidirectional radiation characteristics and lower human body specific absorption rate.

A wearable antenna comprises a dielectric substrate (10), a radiation layer (12) and a grounding layer (11), wherein the radiation layer (12) and the grounding layer (11) are located on the two opposite sides of the dielectric substrate (10). The radiation layer (12) comprises an annular patch (121) and a plurality of strip-shaped patches (122) located on the inner side of the annular patch (121). The wearable antenna is provided with at least one through hole (100) penetrating through the dielectric substrate (10) and the grounding layer (11). At least one through hole (100) is located inside the annular patch (121) and is configured to be integrated with a wearable article. The orthographic projection of the at least one through hole (100) on the dielectric substrate (10) does not overlap the orthographic projection of the radiation layer (12) on the dielectric substrate (10).

The invention relates to a directional diagram fixed-frequency switchable miniature fabric wearable antenna, which belongs to the technical field of wearable wireless communication, and comprises a patch layer, a substrate layer and a bottom surface layer which are positioned on the upper and lower end surfaces of the patch layer, a feed probe and symmetrically arranged snap fastener devices, the two metal via hole pipes penetrate through the substrate layer and are connected with the two communication clamping pieces respectively, and the two communication clamping pieces enable the switching diode to be switched on and off by controlling direct current bias voltage, so that switching of the antenna between a patch mode and a monopole mode is achieved. Reconstruction of a working mode and a radiation pattern is realized through a method of setting direct current bias voltage of the snap switch device, miniaturization of the antenna is realized through a method of using a semi-structure, the plane size is only 0.09 lambda2, and the antenna is respectively in a patch mode and a monopole mode under the condition that the direct current bias voltage is 0V and 5V at the frequency of 2.45 GHz, so that the antenna can be applied to the field of antenna communication. Radiation directional diagrams are suitable for in-vitro communication and body surface communication respectively.

The utility model belongs to the technical field of wearable equipment, and particularly relates to a miniaturized broadband wearable antenna, which comprises an antenna module, the antenna module is detachably hidden in a hat, the antenna module comprises an upper metal layer, a dielectric substrate layer and a lower metal layer, the upper metal layer is arranged on the upper surface of the dielectric substrate layer, and the lower metal layer is arranged on the lower surface of the dielectric substrate layer. The lower metal layer is arranged on the lower surface of the dielectric substrate layer, the upper metal layer is provided with a parasitic patch, and the parasitic patch is used for increasing the bandwidth of the antenna module; the radio frequency lines are detachably hidden in the sleeves, and the radio frequency lines are electrically connected with the antenna modules through hot pressing; the magnetic attraction structure is arranged at the cuff, and the radio frequency line is electrically connected with a wearable device of a user through the magnetic attraction structure. The antenna provided by the utility model adopts a tight coupling technology to realize miniaturization, the bandwidth of the antenna is wide, and the influence of the size of an antenna slot on the antenna is reduced, so that the influence of clothes deformation on the performance of the antenna is reduced.

With this wearable-type antenna device, positions of a wearing target and a detection object can be detected accurately with certainty. A wearable-type antenna device 1 is wearably provided to a wrist P which is the wearing target, and performs presence detection using electromagnetic properties. The wearable-type antenna device is provided with: a device body 2 having a circuit board 20 built therein; and an antenna body 3 which has one end electrically connected to the circuit board 20 as a fixed end, and which can be wound, either alone or together with the device body 2, around the entire circumference of the wrist P in the circumferential direction without any gaps therebetween along the outer circumference of the wrist P.

To provide a wearable antenna device that can accurately and reliably detect the position of an object to be worn or detected.SOLUTION: A wearable antenna device 1 is constructed that is attachable to a wrist P, which is an object to be worn, and that performs presence detection using electromagnetic properties. The wearable antenna device 1 includes a device main body 2 that incorporates a circuit board 20, and an antenna body 3 that has one end electrically connected to the circuit board 20 as a fixed end and that can be wrapped around the entire circumference of the wrist P without any gaps in the circumferential direction along the outer periphery of the wrist P, either together with the device main body 2 or alone.SELECTED DRAWING: Figure 1