48 results about "Rectenna" patented technology

The invention discloses a near-far field wireless energy collection system based on a circularly polarized rectification antenna, and relates to the technical field of rectification antennas and near-field wireless energy transmission, the near-far field wireless energy collection system comprises an annular far-field receiving antenna which is arranged on one surface of a dielectric substrate and is provided with an opening, and the other surface opposite to the dielectric substrate is provided with a metal grounding layer; an annular near-field receiving structure is arranged on the inner side of the far-field receiving antenna, one end of the far-field receiving antenna is connected with the near-field receiving structure through the matching branch, the far-field high-frequency rectifying circuit, the PMU module and the near-field rectifying network in sequence, the other end of the far-field receiving antenna is grounded, and the output end of the PMU module is connected with a load. The system has the advantages of high integration level, high efficiency and wide application scene.

A wireless charging system includes, in part, a first board, a multitude of rectenna boards, and a second board. The first board is adapted to receive a bottom portion of a rechargeable battery, and includes, in part, a ground plane, a first multitude of receptacles positioned along a perimeter of the first board, and circuitry adapted to convert a received RF signal to a DC voltage for delivery to the rechargeable battery. Each rectenna board is associated with and adapted to be inserted into a different one of the first multitude of receptacles. Each rectenna board includes, in part, a multitude of receive antennas for receiving the RF signal. The rectenna boards are adapted to enclose the rechargeable battery when the rechargeable battery is positioned over the first board. The second board is adapted to engage with the rectenna boards to cover a top portion of the rechargeable battery.

The invention discloses a receiving antenna, a wearable rectification antenna and wearable equipment, and relates to the technical field of antennae, the receiving antenna comprises a flexible substrate, a metal floor and a radiation structure; the metal floor is arranged on the first side surface of the flexible substrate; the radiation structure is arranged on the second side surface of the flexible substrate, the radiation structure comprises two radiation floors and a feed transmission line arranged between the two radiation floors, the two radiation floors are oppositely arranged in a spaced mode, and each radiation floor is provided with a first radiation gap and a second radiation gap communicated with the first radiation gap; the two first radiation slots and the two second radiation slots are oppositely arranged, and the second radiation slots are configured to couple radio frequency energy transmitted by the feed transmission line to the first radiation slots so as to excite the first radiation slots to generate radiation; according to the invention, the influence of a human body on the performance of the receiving antenna can be reduced, electromagnetic radiation on the human body is reduced, the stability and efficiency of energy transmission are improved, and both flexibility and low loss are considered.

The application discloses a high-efficiency omnidirectional rectenna based on a class-F harmonic suppression structure and belongs to the rectenna field, comprising: a plurality of rectenna units which are arranged at equal intervals and rotate around the same center and are used for receiving radio frequency energy; the rectenna unit comprises a receiving antenna and a rectifier circuit; the receiving antenna comprises an antenna radiation structure, a metal floor and a feed microstrip line; a U-shaped groove is arranged on a region of the antenna radiation structure which is close to the metal floor, and a rectangular groove is arranged in the U-shaped groove; the U-shaped groove and the rectangular groove are used for suppressing the radiation of the second harmonic and the third harmonic; the rectifier circuit is arranged on the upper surface of a PCB and is used for rectifying the output signal of the antenna radiation structure by the microstrip line and electronic components; and the plurality of rectenna units are connected through a direct current synthesis network, so that the size of the rectenna can be reduced and the efficiency of the rectenna can be improved.

To improve the amplification and efficiency of an antenna contained within a rectenna. Antenna device comprising: a first conductor having a loop shape; a rectifier circuit connected to the first conductor; and a second conductor having a plate shape, comprising a main area extending in one direction substantially orthogonal to a loop area of ​​the first conductor, and an outer edge portion of the main area, wherein the first conductor has a loop whose length in relation to a wavelength at a receiving frequency is greater than 0.15, and the second conductor has the outer edge portion whose minimum length in relation to the length of the loop of the first conductor is greater than 0.4.

A wireless power rectifying system includes, in part, a multitude of boards. Each board includes an array of antenna elements and an array of rectifying circuits each associated with a different one of the array of antenna elements. Each rectifying circuit is adapted to convert an RF signal received by the associated antenna element array to DC voltage. The spacing between each pair of adjacent boards is in a range defined by λ / 20 to λ / 2, where λ is the wavelength of the received RF signal.

The invention discloses a micropower-oriented high-efficiency dual-frequency omnidirectional circularly polarized radio frequency rectification antenna. The antenna comprises a receiving antenna unit and a dual-frequency rectification circuit unit which are connected with each other. The receiving antenna adopts a dual-frequency omnidirectional circular polarization design; the double-frequency rectification circuit comprises a diode branch and a load branch which are connected in parallel. The diode branch comprises a coupling microstrip line, a pilot frequency impedance conversion network and a dual-frequency harmonic suppression structure which are connected in sequence; the load branch is formed by connecting a straight-through filter with a load in series. The double-frequency harmonic suppression structure forms a band-stop characteristic at the secondary harmonic of the double working frequency points; the pilot frequency impedance conversion network realizes a double-frequency-point same-input impedance characteristic; the coupling microstrip line enhances the voltage amplitude of the diode so as to improve the rectification efficiency of the circuit under the condition of micro input power. The antenna has good omnidirectivity and circular polarization performance, and can collect dual-frequency, multi-direction and multi-polarization electromagnetic waves; and meanwhile, the rectifier has the advantages of high rectification efficiency, small size and compact structure under a micro-input power condition, and better meets the requirement of collecting weak radio frequency energy in an actual scene.

A wireless power relay includes, in part, a multitude of receive antennas adapted to receive a beam of radio frequency (RF) signals generated and transmitted by an active array transmitter that generates the beam of RF signals from sunlight. The wireless power relay further includes, in part, a multitude of transmit antennas, and a multitude of phase shifters. Each phase shifter is associated with one of the multitude of receive and transmit antennas and is adapted to shift a phase of an RF signal received by the associated receive antenna such that the multitude of RF signals transmitted by the multitude of transmit antennas are directed to an array of rectennas.

A wireless power relay includes, in part, a multitude of receive antennas adapted to receive a beam of radio frequency (RF) signals generated and transmitted by an active array transmitter that generates the beam of RF signals from sunlight. The wireless power relay further includes, in part, a multitude of transmit antennas, and a multitude of phase shifters. Each phase shifter is associated with one of the multitude of receive and transmit antennas and is adapted to shift a phase of an RF signal received by the associated receive antenna such that the multitude of RF signals transmitted by the multitude of transmit antennas are directed to an array of rectennas.

The application discloses a rectifying antenna module and electronic equipment, and belongs to the technical field of communication. The rectifying antenna module comprises N first antenna units, M second antenna units, a feeding module and a rectifying module. The M second antenna units are arranged at intervals and are arrayed. M is an integer greater than or equal to 4. The N first antenna units are arranged at intervals and surround the M second antenna units. N is an integer greater than or equal to 4. The feeding module comprises a first feeding port and a second feeding port. The first feeding port is electrically connected with the N first antenna units and is used for providing first antenna units arranged in sequence among the N first antenna units with excitation signals of equal amplitude and equal phase interval. The second feeding port is electrically connected with the M second antenna units and is used for providing the M second antenna units with excitation signals of equal amplitude and equal phase. The rectifying module is electrically connected with the M second antenna units.

To provide a rectenna device that allows for easy impedance matching between an antenna and a rectifier circuit.SOLUTION: A rectenna device 100 includes an antenna unit 10 that has a loop antenna 11 consisting of a long side and a short side, and receives microwaves, a rectifier circuit 51 that converts high-frequency signals from the antenna unit 10 into DC power, a harmonic reflection circuit 53 that returns harmonics generated from the rectifier circuit 51 to the rectifier circuit 51, and a matching circuit 52 that performs impedance matching between the antenna unit 10 and the rectifier circuit 51 and is electrically connected to the antenna unit 10 via a feeding point 12 located on the long side.SELECTED DRAWING: Figure 8

[Problem] To provide a rectenna which can cope with a plurality of operating frequencies, is small-sized, and has a high rectifying efficiency. [Solution] A rectenna having a first operating frequency f1 and a second operating frequency f2 different from each other, the rectenna being characterized in that a first loop antenna A and a second loop antenna B to which a capacitor is connected in series are connected in parallel to the input terminals of a rectifier.

An augmented logarithmic spiral antenna structure includes a first conductive layer, a dielectric layer and a second conductive layer. The first conductive layer includes a first spiral arm and a plurality of second spiral arms. The first spiral arm includes a first initial radius. The second spiral arms are disposed around and connected to the first spiral arm, and each of the second spiral arms includes a second initial radius. The dielectric layer has a top surface and a bottom surface, and the top surface is connected to the first conductive layer. The second conductive layer is connected to the bottom surface. A plurality of the second initial radii of the second spiral arms are different from each other, and different from the first initial radius.

This receiver includes an antenna, a rectifier circuit, and a processing circuit. The antenna has an annular shape, and includes a substrate and a conductor having a predetermined width. The rectifier circuit is installed on the substrate and rectifies a power supply signal received by the antenna. The processing circuit is installed on the substrate and executes processing for transmitting a data signal via the antenna.

A system and method of harvesting energy are provided using a geometric diode and antenna. The geometric diode includes a start portion, end portion, and neck portion joining the start portion and end portion. The geometric diode tapers laterally inward at the neck portion, which defines the narrowest point of the geometric diode. The antenna includes first and second halves forming a bow-tie shape, with inner ends of the antenna contacting respective laterally opposite sides of the neck portion of the geometric diode. A method of using the geometric diode includes harvesting electromagnetic energy such as infrared, microwave, or terahertz radiation through the antenna and into the geometric diode. Example materials used include gold for the antenna. The geometric antenna may be formed from tungsten disulfide, boron nitride, perovskite, molybdenum disulfide, or a MXene nanomaterial composed of transition metal carbides, nitrides, or carbonitrides.

This prevents and suppresses radio interference, enabling accurate measurement of heart rate and other parameters using radar. [Solution] When measuring vital signs including the heart rate of a person P by irradiating them with radio waves, the system includes an antenna 2 that can be placed on the surrounding objects, including the bed B on which the person P is lying down, and which receives the irradiated radio waves; a rectifier circuit 3 that forms a rectenna with the antenna 2 and converts the radio waves received by the antenna 2 into electrical energy; and a secondary battery 4 that stores the electrical energy converted by the rectifier circuit 3.

The application discloses a kind of circular polarization Ka wave band broadband rectenna based on dielectric resonator, it is related to electronic circuit technical field, including dielectric substrate, dielectric resonator being arranged above dielectric substrate and ground plate being arranged below dielectric substrate, and rectifier circuit;The edge of the long side of the dielectric substrate is equipped with a plurality of metal through holes that penetrate the dielectric substrate, and the plurality of through holes form a substrate integrated waveguide structure, a planar transmission microstrip line, a first gradual microstrip line and an SIW upper metal layer connected in sequence are printed on the dielectric substrate, a rectangular slot is formed in the middle of the SIW upper metal layer, and a third gradual microstrip line, a second gradual microstrip line and a radiation patch connected in sequence are arranged in the rectangular slot;One end of the planar transmission microstrip line is connected to the rectifier circuit.The application has the advantages of simple structure, wide impedance bandwidth, stable gain, small size, and realizes circular polarization and operation in the millimeter wave band.

Disclosed is a diode device (1) including an insulator (7) extending between and in contact with two metal terminals (3, 5), wherein the insulator comprises at least one epsilon-near-zero (ENZ) material, or comprises at least one epsilon-negative (ENG) material (7A) and a second insulator material (7B) forming a double insulator structure, and an electron source layer (9), particularly of graphene, between a metal terminal and the ENZ or ENG material. The insulator provides a reduced effective capacitance which permits rectifying diode operation at THz, infrared or visible frequencies, particularly for a solar radiation rectenna.

The purpose of the present invention is to improve the gain and efficiency of an antenna included in a rectification antenna. The antenna device includes: a first conductor having an annular shape; a rectifying circuit connected to the first conductor; and a plate-shaped second conductor having a main surface extending in a direction substantially orthogonal to the ring-shaped surface of the first conductor and an outer edge portion of the main surface, in which a length of the ring of the first conductor is greater than 0.15 with respect to a wavelength at a reception frequency, and the minimum length of the outer edge portion of the second conductor is greater than 0.4 with respect to the length of the loop of the first conductor.

The invention discloses a rectification antenna and array suitable for long-distance microwave energy transmission. The rectification antenna comprises four rectification antenna units, a power synthesis network and a DC load. The four rectification antenna units are the same in structure, each rectification antenna unit comprises a rectifier chip and an antipode linear tapered slot antenna which are connected, the antipode linear tapered slot antenna is used for receiving microwave energy from a free space and inputting the microwave energy to the rectifier chip, and the rectifier chip is used for converting the microwave energy into a direct current signal; the four rectification antenna units are connected with a direct current load through a power synthesis network to supply power to the direct current load; the power synthesis network is used for adjusting the series-parallel connection relation of the four rectification antenna units so as to adjust the output voltage and current for supplying power to the direct current load. Through an innovative PCB antenna-CMOS chip cascade and array scheme, the contradiction between efficiency and scale in long-distance transmission is solved, and the effects of low cost and high integration are achieved.

This invention employs a novel method of phase calibrating a very large distributed antenna. The calibration technique makes possible a new, and more practical, architecture for Solar Power Satellites. Most previous solar power satellite concepts involve the construction of unified multi-kilometer sized structures. With this invention, rather than a large unified structure, the invention may employ a collection of small free flying satellites distributed over a volume several kilometers in diameter. The invention shows how to coherently phase conjugate a microwave signal transmitted from the ground up to the constellation of satellites so that the amplified return transmission is concentrated in a desired way within a highly restricted area on the ground. The invention solves the problem of achieving the required phase precision in the return microwave beam. The invention also provides a new way to more uniformly distribute the microwave beam over a large ground based rectenna.

The invention discloses an ultra-wideband high-efficiency monopole rectification antenna and a wideband impedance matching processing method. The impedance of a broadband rectification antenna is easily influenced by frequency change, so that a broadband impedance accurate matching mode is difficult to realize; an upper radiation patch and a lower radiation patch are respectively arranged on the upper end surface and the lower end surface of a dielectric substrate; the main sheet body is attached to the dielectric substrate, the first narrow composition sheet, the second narrow composition sheet and the third narrow composition sheet are sequentially attached to the dielectric substrate in the length direction of the dielectric substrate, the main sheet body is provided with a hollow part, one end of the lower radiation patch is a notch end with a notch, and the notch end of the lower radiation patch is arranged close to the main sheet body; the broadband impedance matching processing method comprises the steps of calculating and determining broadband impedance corresponding to a target frequency band according to a target value, and calculating according to the broadband impedance to obtain the size determination process of a first narrow composition sheet, a second narrow composition sheet and a third narrow composition sheet in the ultra-wideband high-efficiency monopole rectification antenna.

The application discloses a receiving antenna, a wearable rectifying antenna and a wearable device, and relates to the technical field of antennas.The receiving antenna comprises a flexible substrate, a metal floor and a radiation structure.The metal floor is arranged on the first side surface of the flexible substrate.The radiation structure is arranged on the second side surface of the flexible substrate.The radiation structure comprises two radiation floors and a feed transmission line arranged between the two radiation floors.The two radiation floors are oppositely and spacedly arranged.The radiation floor is provided with a first radiation slot and a second radiation slot in communication with the first radiation slot.The two first radiation slots and the two second radiation slots are oppositely arranged.The second radiation slot is configured to couple the radio frequency energy transmitted by the feed transmission line to the first radiation slot so as to excite the first radiation slot to generate radiation.The application can reduce the influence of the human body on the performance of the receiving antenna, reduce the electromagnetic radiation to the human body, improve the stability and efficiency of energy transmission, and simultaneously consider flexibility and low loss.

A rectenna device is provided which is capable of achieving high rectification efficiency over a wide range of input power intensity. A rectenna device comprises: two or more antenna elements; a first rectifier circuit provided for each of the antenna elements, which rectifies one output of the antenna element; and a second rectifier circuit, which can combine and input the outputs of the two or more antenna elements and rectify the combined output. A control is implemented to change the number of antenna elements connected to each of the first and second rectifier circuits.

The application discloses a dual-frequency bidirectional rectification antenna with a wide power range, relates to the technical field of communication, and discloses the following technical scheme: two first rectangular grooves and a second rectangular groove are etched on a rectangular metal patch, so that the antenna only resonates at a high frequency band and is a directional radiation mode; L-shaped metal patches are arranged on two sides of the rectangular metal patch, so that the antenna resonates at the high frequency band and a low frequency band, and the low frequency band is an omnidirectional radiation mode; and a rectification circuit combining a rectification branch working at a low input power and a rectification branch working at a high input power is designed; the two rectification branches switch and rectify electromagnetic waves collected by the antenna at the high frequency band and the low frequency band through the directional radiation mode and the omnidirectional radiation mode, so that high conversion efficiency in a wide power range is realized.

The invention relates to the technical field of radio frequency energy collection, solves the problem that the output voltage and the conversion efficiency are limited due to the fact that a rectification antenna in the prior art is single in working frequency band, narrow in bandwidth and incapable of receiving circularly polarized waves, and discloses a wide-frequency-band circularly polarized rectification antenna which comprises an antenna body used for collecting radio frequency energy in the environment, the antenna comprises a substrate, a dielectric resonator and a rectifying circuit, the dielectric resonator and the rectifying circuit are arranged on the substrate, the rectifying circuit is used for converting radio frequency energy collected by the antenna into direct current energy to supply power to a load L2, and the rectifying circuit comprises a matching circuit. The rectifying antenna is simple in structure and high in average efficiency and has a circular polarization characteristic in an application frequency band, and the rectifying circuit is also simple in structure, is based on a single rectifying diode structure and completely covers UMTS-2100, Wi-Fi and LTE-2600 frequency bands.

The utility model relates to a microwave rectification antenna comprising an integrated antenna-rectification unit, a reconfigurable frequency selection module, a heat radiation layer and a protection cover. The integrated antenna-rectification unit comprises an antenna radiation layer and a rectification module which are fixedly connected; the antenna radiation layer is a butterfly-shaped metal patch, and the center of the butterfly-shaped metal patch is provided with a feeding point. The rectification module comprises a dielectric substrate and a grounding layer which are arranged in sequence; the grounding layer is connected with the antenna radiation layer through a metalized via hole array, and a plurality of via holes are annularly distributed at the edge of the antenna radiation layer. The microwave rectification antenna is ingenious in design, the antenna and the rectification unit are integrated together, better impedance matching can be achieved, energy loss caused by separation type design is reduced, and therefore the conversion efficiency is improved, and the size is small and exquisite.

The invention relates to the technical field of robot automatic following and positioning, and discloses a UWB single-chip robot automatic following system based on AOA positioning, which comprises a passive UWB tag, a robot UWB base station and a cooperative positioning network formed by wireless links of the passive UWB tag and the robot UWB base station, the passive UWB tag is integrated with a rectification antenna, a micro-power-consumption controller and a backscattering modulator and is not provided with a battery. The rectification antenna receives the UWB radio frequency energy and converts the UWB radio frequency energy into direct current According to the AOA positioning-based UWB single-chip robot automatic following system, battery-free endurance is realized through passive UWB label design, the positioning precision of a complex environment is improved by fusing an AOA and TDoA hybrid positioning algorithm, the problem of multi-target conflict is solved by adopting a time division and space division multiplexing hybrid multiple access protocol, the endurance constraint of an active label is thoroughly eliminated, and the positioning precision of the robot is improved. The method can also stably work in a non-line-of-sight scene, supports simultaneous following of multiple targets, remarkably reduces the maintenance cost, and improves the positioning stability and scene adaptability.

A wireless power receiving device includes rectennas configured to generate sub-direct current (DC) powers based on sub-alternating current (AC) powers, a DC power combining circuit, processing circuitry configured to divide the rectennas into first to third groups based on power distribution information and first and second reference values, the power distribution information being based on the sub-AC powers, generate a control signal based on the first to third groups including different numbers of rectennas, control the DC power combining circuit to perform a series connection and a parallel connection for the plurality of sub-DC powers based on the control signal, the DC power combining circuit being configured to generate a combined DC power by performing a power synthesis based on the series connection and the parallel connection, and generate an output power based on the combined DC power, and a battery configured to store the output power.

An electric field sensor device includes: an antenna device that has a dipole structure that receives an electric field, the antenna device including a first antenna element connected to or in contact with a ground and a conductor existing with a certain resistance value, and a second antenna element grounded to an earth ground or not grounded to an earth ground; a rectifier circuit that rectifies a signal induced in the antenna device; and a detection unit that detects a level of an output voltage of the rectifier circuit. The detection unit detects a change in level of the output voltage caused when the first antenna element or the second antenna element not grounded to an earth ground is spatially coupled to or in contact with another conductor different from the conductor, and detects a state or a situation of the other conductor.