The disclosure describes techniques to provide antennae configured to harvest radio-frequency (RF) energy from the nearby environment to provide electrical energy to an electrically powered device. Antennae may be configured in different shapes, lengths, locations, and materials to efficiently collect RF energy to be converted to electrical power. In some examples, RF energy may be harvested from existing sources, such as FM radio transmissions, communication transmissions such as Wi-Fi and BLUETOOTH, and similar existing sources. In other examples, antennae may be configured to collect energy from a source specifically designated to recharge the device. In some examples, the harvested RF energy may be sufficient to power the device. In other examples, the harvested RF energy may provide enough power to reduce the amount of recharging required by other means, such as by inductive recharging.

The disclosure describes techniques to provide antennae configured to harvest radio-frequency (RF) energy from the nearby environment to provide electrical energy to an electrically powered device. Antennae may be configured in different shapes, lengths, locations, and materials to efficiently collect RF energy to be converted to electrical power. In some examples, RF energy may be harvested from existing sources, such as FM radio transmissions, communication transmissions such as Wi-Fi and BLUETOOTH, and similar existing sources. In other examples, antennae may be configured to collect energy from a source specifically designated to recharge the device. In some examples, the harvested RF energy may be sufficient to power the device. In other examples, the harvested RF energy may provide enough power to reduce the amount of recharging required by other means, such as by inductive recharging.

A wireless power supply system may comprise a wireless power transmitting circuit configured to transmit radio-frequency (RF) signals, and a wireless power receiving circuit configured to convert power from the RF signals into a direct-current (DC) output voltage stored in an energy storage element. The wireless power transmitting circuit may be electrically or magnetically coupled to an antenna and/or electrical wiring of a building for transmitting the RF signals. The wireless power transmitting circuit may be housed in an enclosure that is affixed in a relative location with respect to the wireless power receiving circuit. The antenna may comprise two antenna wires that extend from the enclosure. The wireless power receiving circuit may be electrically or magnetically coupled to an antenna for receiving the RF signals. The wireless power receiving circuit may comprise an RF-to-DC converter circuit for converting the power from the RF signals into a DC output voltage.

A wireless power supply system may comprise a wireless power transmitting circuit configured to transmit radio-frequency (RF) signals, and a wireless power receiving circuit configured to convert power from the RF signals into a direct-current (DC) output voltage stored in an energy storage element. The wireless power transmitting circuit may be electrically or magnetically coupled to an antenna and/or electrical wiring of a building for transmitting the RF signals. The wireless power transmitting circuit may be housed in an enclosure that is affixed in a relative location with respect to the wireless power receiving circuit. The antenna may comprise two antenna wires that extend from the enclosure. The wireless power receiving circuit may be electrically or magnetically coupled to an antenna for receiving the RF signals. The wireless power receiving circuit may comprise an RF-to-DC converter circuit for converting the power from the RF signals into a DC output voltage.

A wireless charging transmission apparatus by using 3D polyhedral magnetic resonance based on multi-antenna switching includes a magnetic resonance wireless energy transmitting module, a plurality of magnetic resonance transmitting antennas, a plurality of receiving antennas, and a magnetic resonance wireless energy receiving module that are connected in sequence. The magnetic resonance wireless energy transmitting module is configured to convert DC power into RF energy and control an operation mode. The magnetic resonance transmitting antennas are configured to convert the RF energy into a spatially distributed reactive field. The receiving antennas are configured to convert the reactive field into the RF energy. The magnetic resonance wireless energy receiving module is configured to convert the RF energy into DC power and charge or power a load. When one of the transmitting antennas is used as a main transmitting antenna, the rest transmitting antennas are used as relay coupling antennas.

A compact surveillance system that includes: a power source configured to provide power to the system; a power input coupled to the power source 9 and configured to provide power to the system; one or more sensors configured to measure a measurand; a Loosely Coupled Transformer (LCT) transducer coupled to the one or more sensors and the power source, the LCT configured to receive an external signal and convert the external signal to an electrical signal; a processor in electrical or magnetic communication with the one or more sensors, the processor configured to process the electrical signal, generate information relative to one or more of progress against predictive behaviour of selected from one or more of: corrosion; fatigue; temperature; flow and environment; with the wireless transfer system transferring information to a remote Loosely Coupled Transformer LCT transducer and converts sensor data input to information using modelling; an information storage device configured to store the information or data input, the information including processed data, pre-processed data and predictive models, with a resultant output of models is stored; and where the LCT transducer is configured to transfer the information, the information being generated based on a measurand to reduce a transfer energy in the system.

A compact surveillance system that includes: a power source configured to provide power to the system; a power input coupled to the power source 9 and configured to provide power to the system; one or more sensors configured to measure a measurand; a Loosely Coupled Transformer (LCT) transducer coupled to the one or more sensors and the power source, the LCT configured to receive an external signal and convert the external signal to an electrical signal; a processor in electrical or magnetic communication with the one or more sensors, the processor configured to process the electrical signal, generate information relative to one or more of progress against predictive behaviour of selected from one or more of: corrosion; fatigue; temperature; flow and environment; with the wireless transfer system transferring information to a remote Loosely Coupled Transformer LCT transducer and converts sensor data input to information using modelling; an information storage device configured to store the information or data input, the information including processed data, pre-processed data and predictive models, with a resultant output of models is stored; and where the LCT transducer is configured to transfer the information, the information being generated based on a measurand to reduce a transfer energy in the system.

System and method for direct solar energy to device transmission includes collecting and converting solar radiation energy to electrical energy by at least one satellite, generating a transmissive energy from the electrical energy, forming a transmissive energy beam, transmitting the energy beam from space directly to an electronic device located on Earth, receiving the energy beam by the electronic device's rectenna, converting the energy beam to alternating current, matching rectenna's antenna impedance with the rectenna's rectifying circuit impedance, rectifying the alternating current to direct current, and powering a load of the electronic device.

Near-field antennas and methods of operating and manufacturing near-field antennas are provided herein. An example near-field antenna for transmitting radio frequency (RF) power transmission signals includes: (i) a conductive plate including one or more channels extending through the conductive place, a respective channel of the one or more channels having first and second segments, and (ii) a feed element configured to direct a plurality of RF power transmission signals towards the conductive plate. At least some of the RF power transmission signals cause an accumulation of RF energy within a near-field distance of the conductive plate. Furthermore, the accumulation of RF energy includes: (i) a first zone of accumulated RF energy at the first segment, and (ii) a second zone of accumulated RF energy at the second segment, the second zone of accumulated RF energy being distinct from the first zone of accumulated RF energy.

Near-field antennas and methods of operating and manufacturing near-field antennas are provided herein. An example near-field antenna for transmitting radio frequency (RF) power transmission signals includes: (i) a conductive plate including one or more channels extending through the conductive place, a respective channel of the one or more channels having first and second segments, and (ii) a feed element configured to direct a plurality of RF power transmission signals towards the conductive plate. At least some of the RF power transmission signals cause an accumulation of RF energy within a near-field distance of the conductive plate. Furthermore, the accumulation of RF energy includes: (i) a first zone of accumulated RF energy at the first segment, and (ii) a second zone of accumulated RF energy at the second segment, the second zone of accumulated RF energy being distinct from the first zone of accumulated RF energy.