13 results about "Antenna impedance" patented technology

A sensor system configured to provide an indication of a sensed parameter, the sensor system comprising: a reader comprising a reader antenna configured to transmit a carrier signal; a tag comprising: a tag antenna configured to receive the carrier signal; power harvesting circuitry coupled to the tag antenna and configured to produce an operating voltage from the receiver carrier signal; the voltage-controlled oscillator, VCO, circuitry coupled to the power harvesting circuitry and configured to receive the operating voltage therefrom, wherein the VCO circuitry comprises a VCO configured to generate an output signal having a frequency which varies based on the sensed parameter, and wherein the VCO circuitry is configured to modulate an impedance of the tag antenna according to a timing parameter selected based on the frequency of the output signal from the VCO; a controller coupled to the reader antenna and configured to: (i) identify an indication of the timing parameter of the impedance modulation of the tag antenna based on detected changes in the reader antenna impedance, and (ii) determine an indication of the sensed parameter based on the identified indication of the timing parameter.

A thermally adaptive antenna system having an antenna structure, an EM) power signal, a DC power signal, an impedance tuner, a temperature sensor in the antenna, a DC-DC conversion component, and a microcontroller. The microcontroller provides a tuning command to the impedance tuner, causing the impedance tuner to compensate for an impedance change in the antenna due to a temperature change in the antenna. An environmentally adaptive antenna system has an antenna structure, an EM power signal, a DC power signal, an EM power splitter, a directional coupler, a reference receiver, a measurement receiver, an impedance tuner, and a controller. The controller calculates antenna impedance change based on observed changes in return loss, calculates a corresponding correction to the antenna impedance, and sends a command to the impedance tuner to implement the correction to the antenna impedance.

The present disclosure relates to a diplexer with an impedance inverter. The diplexer can be used to isolate a transmitter and a receiver that share a common antenna. The diplexer is balanced by using an impedance gradient that provides an impedance that causes a balun of the diplexer to cut off access to the common antenna rather than replicate the antenna impedance. Such a cut off can have lower insertion loss than a diplexer that replicates the antenna impedance only to separate differential signals and common mode signals of the receiver and transmitter.

A device for detecting an approach of a part of a user's body or of a portable user equipment, intended to be housed on board a motor vehicle, including: a near-field communication antenna configured to transmit signals at a high frequency selected between 3 and 30 MHz, the antenna being able to detect the approach of a portable user equipment and to communicate in near-field mode with the portable user equipment. The antenna including at least one winding that extends continuously in the form of a set of comb-shaped rods such that the antenna is able to generate a variation in capacitance in response to the approach of a part of a user's body; a controller for controlling the antenna; and a measurer for measuring a variation in impedance of the antenna, generated by the variation in capacitance.

This invention relates to the field of antenna technology, and specifically discloses an antenna and a wireless device, including a substrate and an antenna body. The antenna body is at least partially mounted on the surface of the substrate. The antenna body includes a main stub, an adjustable stub, a feed point, and a ground plane. The main stub is at least partially mounted on the surface of the substrate. The feed point is located on the main stub, and the ground plane is coupled to the main stub. The adjustable stub is located on the main stub and can move along a first direction to adjust the antenna impedance. Through this method, the antenna of this invention can match the impedance of the antenna to the impedance of the feed line by moving the adjustable stub, thereby enhancing anti-interference capability and radiation efficiency.

This invention discloses an antenna with applied impedance, belonging to the field of wireless communication technology. The antenna has a long, flat structure with a slot inside, forming a slot opening. The slot opening is a semi-circular structure, which constitutes the main part of the antenna's radiating surface. The semi-circular structure has a gap, and the applied impedance is placed in the gap of the slot opening. The antenna is flat and can be printed on a single-sided PCB, facilitating its assembly in compact wireless device environments. It also provides a tunable and easy-to-operate antenna radiating surface. By placing the applied impedance in the gap of the slot, a reasonable traveling and standing wave distribution of the antenna current is ensured, resulting in a wide antenna impedance bandwidth while maintaining high radiation efficiency. Therefore, the antenna of this invention can be built into compact and complex wireless communication device environments and maintain high performance.

This invention provides a millimeter-wave broadband packaged antenna structure, comprising a packaging substrate composed of alternating stacked metal layers and dielectric layers. Multiple metal layers have vertically aligned center-gap regions. A driving patch, a microstrip line matching segment, and a stripline are sequentially connected and aligned along the signal transmission path. A parasitic patch, parallel to and vertically aligned with the driving patch, is located in an adjacent metal layer directly above it. These two patches are not directly electrically connected but are fed through electromagnetic field coupling, allowing the driving patch and parasitic patch to operate at similar but different resonant frequencies, forming a dual-resonance operating mode. This effectively expands the antenna impedance bandwidth. Stripline shielding holes are provided on both sides of the stripline, and antenna shielding holes are arranged around the edge of the gap regions to suppress signal leakage and cavity resonance. This invention replaces the traditional coplanar or slotted method with a vertically stacked coupling structure, achieving antenna miniaturization while significantly improving bandwidth, and enhancing the design freedom of impedance matching through the microstrip line matching segment.

A tuning method for an antenna device is provided. The antenna device includes an antenna, an impedance matching tuner (IMT) and a radio frequency front end (RFFE). The antenna device is coupled to a radio frequency transmitter / receiver (RF transceiver), In a characterization stage, the antenna device is characterized to obtain several mapping data between the first load impedances for transmitting (TX) frequencies and the second load impedances for receiving (RX) frequencies, corresponding to several configurations of the IMT and several operating conditions of the antenna device. In a tuning stage, the first load impedances at a current configuration of the IMT are estimated. The first load impedances are mapped to obtain the second load impedances at the current configuration based on the mapping data. The IMT is tuned based on the first load impedances and the second load impedances at the current configuration of the IMT.

The application provides a method for creating a usage scenario determination database and a mobile communication system for the same. In creating a first part of the usage scenario determination database, an impedance of at least one first tuner is repeatedly measured until all antennas among the antenna group are selected, a plurality of predetermined testing frequencies are selected and a plurality of tuning states of the at least one first tuner are selected. In creating a second part of the usage scenario determination database, an antenna impedance is repeatedly measured until all antennas among the antenna group are selected, the plurality of predetermined testing frequencies are selected, a plurality of tuning states of at least one second tuner are selected and at least one usage scenario is selected. The usage scenario determination database is created base on the first part and the second part.

A method for wireless communication by a user equipment (UE) includes measuring changes in impedance at an antenna. The method also includes estimating an amount of power reflected from the antenna based on the measured changes in impedance at the antenna, in order to obtain an estimated amount of radiated power. The method further includes dynamically increasing a transmit power of the UE, based on the estimated amount of radiated power, up to a limit.

The utility model relates to RFID label technical field, concretely is a kind of RFID label with on-off detection function, including substrate, antenna and chip being set on substrate, the antenna includes main radiating section and disconnectable auxiliary radiating section, the auxiliary radiating section is connected with main radiating section by mechanical switch unit;The utility model is through the synergic effect of magnetron mechanical switch unit and antenna impedance change, realizes the on-off detection of passive, sensorless, solves the cost high, complex structure problem caused by the dependence of prior art on external sensor or additional power supply, simultaneously through the real-time association of nonvolatile storage area in chip and on-off state, the persistent record and remote wireless reading of on-off event are realized, avoid the defect that state information is easily lost in prior art, cannot trace back history operation.

The application discloses a wireless energy and information cooperative transmission system and method based on controllable harmonic regulation, and the wireless energy and information cooperative transmission system comprises a transmitting end and a receiving end; the receiving end comprises a receiving antenna, an impedance matching network, a rectifier circuit, a reconfigurable harmonic transceiving network, a direct current filtering network and a load. A double-diode pair with opposite polarities is adopted in the rectifier circuit, and the opening and closing of a single diode are controlled through the reconfigurable harmonic transceiving network, so that a secondary harmonic can be generated directly by using the nonlinear characteristics of the rectifier module without additional modules such as a transmitter and a local oscillator, deep integration of energy collection and uplink communication is realized, meanwhile, the secondary harmonic can be accurately controlled through the reconfigurable harmonic transceiving network, so that reliable amplitude modulation can be realized. In addition, through impedance matching design, the rectification power conversion efficiency of the system remains stable within the range of load impedance.

This invention discloses a low cross-polarization antenna based on deep learning-optimized design. The antenna employs a differential feed structure with an H-shaped coupling slot and vertical metal struts to suppress cross-polarization, eliminating the need for an external single-ended to differential converter. It expands bandwidth and stabilizes gain through a double-T-shaped matched short-circuit structure. A highly integrated, miniaturized antenna is achieved using an embedded vertically stacked differential excitation architecture. Optimization is performed using an antenna performance mapping model constructed from a CNN-Transformer hybrid neural network. The training process is optimized using simulated annealing, and optimal structural parameters are selected through multi-objective reverse design. The performance of the optimization method is finally verified through full-wave electromagnetic simulation. This invention combines antenna physics with a deep learning model to achieve synergistic optimization of antenna impedance, bandwidth, and gain, addressing the design requirements for balancing multiple antenna performance indicators. The designed antenna features low cross-polarization, stable gain, and miniaturization.