5 results about "Spiral antenna" patented technology

The present application relates to the field of electronic tags, in particular to a high-frequency universal electronic tag antenna assembly and an electronic tag. The present application discloses a high-frequency universal electronic tag antenna assembly and an electronic tag, wherein the electronic tag antenna assembly comprises a substrate, a planar spiral antenna body, a plurality of chip pad assemblies and a plurality of communication units, the planar spiral antenna body and the plurality of chip pad assemblies are arranged on the front surface of the substrate, the plurality of communication units are arranged on the back surface of the substrate, the plurality of communication units correspond to the plurality of chip pad assemblies one by one, and are used for connecting the plurality of chip pad assemblies to different positions of the antenna body respectively, the communication units and the chip pad assemblies are insulated by the substrate and can be connected to each other through the perforations. The electronic tag antenna assembly of the present application can be compatible with a plurality of high-frequency tag chips, is simple to use, is convenient for production and management, has low cost, and has a simple structure and is easy to implement.

The present application provides a spiral antenna. The spiral antenna comprises a feeding plate and four radiation elements. The feeding plate is configured to feed a signal and comprises a top surface. The four radiation elements are electrically connected to the feeding plate respectively and spirally surround a dielectric space away from the feeding plate respectively in the same direction, wherein the four radiation elements are arranged in a ring shape and are circular in any cross section parallel to the top surface of the feeding plate. Each of the radiation elements comprises a feeding unit and a radiation part. The feeding unit comprises a shorting part and a feeding part, wherein one end of the shorting part is connected to the feeding plate, the feeding part is arranged on one side of the shorting part with a spacing, and one end of the feeding part is connected to the feeding plate. The radiation part is configured to generate a wireless signal transmission and reception in a first frequency band. One end of the radiation part is connected to the shorting part, and the other end of the radiation part is connected to the feeding part.

The application discloses an antenna-coupled micro-bridge structure for a small-pixel microbolometer and a preparation method thereof, and belongs to the technical field of photoelectric detection. The spiral antenna and the electrode bridge leg are arranged alternately, the proportion of the small-pixel micro-bridge structure thermal isolation support bridge leg is improved, the bridge leg is lengthened, the thermal conductivity is reduced, and the temperature rise of the microbolometer is improved; when the spiral antenna arm is used for coupling the thermal sensitive unit to receive infrared radiation, the absorption of light energy can be more concentrated on the thermal sensitive unit, the temperature rise of the thermal sensitive unit is further improved under the condition that the total light absorption rate of the device is similar, the effective absorption area of the micro-bridge structure is equivalent to being increased, compared with the traditional microbolometer, energy can be better collected, and the detection efficiency is improved; while low thermal conductivity and high absorption rate are obtained, the thermal mass of the micro-bridge structure is reduced; the double-layer micro-bridge structure of the traditional upper absorption layer and the lower thermal isolation layer is replaced, the preparation process is simplified, and the device manufacturing cost can be reduced.

The application discloses an agricultural sensor adaptive topology networking device, method and storage medium. The device comprises a sink node and a plurality of sensor nodes, the sensor node comprises a microcontroller module, an environment perception module and a multi-mode radio frequency transceiver module, the microcontroller module reads the current relative humidity and photosynthetically active radiation attenuation rate, calculates the directed link cost, and when the directed link cost exceeds the cost threshold and the current packet loss rate change slope is greater than zero, the omnidirectional microstrip antenna is cut off and the directional spiral antenna is turned on, the media access control layer radio frequency transmission power is improved, and the network topology reconstruction is initiated by executing the directional routing request with the direction identifier. The application can solve the problem of route response lag caused by passive detection, and improve the stability of network structure and communication data.