Abstract: The disclosed technology includes device, systems, techniques, and methods for mm-wave energy harvesting utilizing a Rotman-Lens-based rectenna system. An energy harvester system can include one or more antenna, a Rotman Lens having a beam port side and an antenna side in electrical communication with the one or more antenna, and a rectifier network in electrical communication with the beam port side of the Rotman Lens. The energy harvester system can also include a power combining network in electrical communication with the rectifier network and having an output. The rectifier network can include a plurality of rectifiers connected to the beam port side of the Rotman Lens. Further, each of the plurality of rectifiers can include a rectifying diode. The power combining network can include a plurality of bypass diodes.

Abstract: A wireless power transmission system includes a planar source conductor configured to generate a first periodically fluctuating electromagnetic near field in response to an alternating current received from the power source. A planar resonant source element is coplanar with the planar source conductor and has a first resonant frequency. The planar resonant source element has a Q factor that is at a maximum at the first resonant frequency. A planar resonant load element resonates at the first resonant frequency. A planar load conductor is electromagnetically coupled to and coplanar with the planar resonant load element and generates a current in response to the second periodically fluctuating electromagnetic near field from the planar resonant load element.

Abstract: A strain and crack sensor senses an amount of strain induced in an object. A receiving planar antenna has a first resonant frequency and is configured to receive a querying signal at the first resonant frequency. A transmitting planar antenna has a second resonant frequency that is twice the first resonant frequency. At least one of the receiving planar antenna and the transmitting planar antenna is bonded to the object so that at least one of strain induced in the object or a crack formed in the object causes a shift in at least one of the first resonant frequency or the second resonant frequency. A matching element is in electrical communication with the first planar antenna and the second planar antenna. The matching element is configured to cause the transmitting planar antenna to radiate a response signal in response to the querying signal.

Abstract: A wireless power transmission system includes first source conductor that generates a first electromagnetic near field in response to a power source. A first source element resonates in response to excitation from the first source conductor. A second resonant source element resonates in response to excitation from the first source conductor. A first resonant load element resonates in response to excitation from the first resonant source element. The first resonant load element generates a fluctuating field when resonating. A second resonant load element resonates at the second resonant frequency in response to excitation from the second resonant source element. The second resonant load element generates a fluctuating field when resonating. A first load element generates a first current applied to a first load in response to resonance in the first resonant load element and the second resonant load element.

Abstract: A wireless power transmission device for transmitting power from a power source to a load includes a three-dimensional source conductive element that is electrically coupled to the power source and that induces an alternating current therein. A first three-dimensional resonating conductive element surrounds the source conductive element, but is physically decoupled therefrom and resonates in response to the alternating current induced in the source conductive element. A second three-dimensional resonating conductive element is physically spaced apart from the first three-dimensional resonating conductive element and resonates in response to an oscillating field generated by the first three-dimensional resonating conductive element. A three-dimensional load conductive element is within the second three-dimensional resonating conductive element, but is physically decoupled therefrom.

Abstract: An exemplary embodiment of the present invention provides a passive electrical component comprising a substrate, a first electrically conductive layer, a first dielectric layer, and a second electrically conductive layer. The first electrically conductive layer can be additively deposited on the substrate. The first dielectric layer can be additively deposited on the first conducive layer. The first dielectric layer can comprise a cross-linked polymer. The second electrically conductive layer can be additively deposited on the first dielectric layer. The resonant frequency of the passive electrical component can exceed 1 gigahertz.

Abstract: A strain and crack sensor senses an amount of strain induced in an object. A receiving planar antenna has a first resonant frequency and is configured to receive a querying signal at the first resonant frequency. A transmitting planar antenna has a second resonant frequency that is twice the first resonant frequency. At least one of the receiving planar antenna and the transmitting planar antenna is bonded to the object so that at least one of strain induced in the object or a crack formed in the object causes a shift in at least one of the first resonant frequency or the second resonant frequency. A matching element is in electrical communication with the first planar antenna and the second planar antenna. The matching element is configured to cause the transmitting planar antenna to radiate a response signal in response to the querying signal.

Abstract: An exemplary embodiment of the present invention provides a passive electrical component comprising a substrate, a first electrically conductive layer, a first dielectric layer, and a second electrically conductive layer. The first electrically conductive layer can be additively deposited on the substrate. The first dielectric layer can be additively deposited on the first conducive layer. The first dielectric layer can comprise a cross-linked polymer. The second electrically conductive layer can be additively deposited on the first dielectric layer. The resonant frequency of the passive electrical component can exceed 1 gigahertz.

Abstract: A multilayer antenna including a first microstrip patch positioned along a first plane, a second microstrip patch positioned along a second plane that is substantially parallel to the first plane, and a ground plane having a slot formed therein. The multilayer antenna also includes a microstrip feeding line for propagating signals through the slot in the ground plane and to the second microstrip patch and a backlobe suppression reflector for receiving some of the signals and reflecting the signals to the slot in the ground plane.

Abstract: A wireless power transmission system includes first source conductor that generates a first electromagnetic near field in response to a power source. A first source element resonates in response to excitation from the first source conductor. A second resonant source element resonates in response to excitation from the first source conductor. A first resonant load element resonates in response to excitation from the first resonant source element. The first resonant load element generates a fluctuating field when resonating. A second resonant load element resonates at the second resonant frequency in response to excitation from the second resonant source element. The second resonant load element generates a fluctuating field when resonating. A first load element generates a first current applied to a first load in response to resonance in the first resonant load element and the second resonant load element.

Abstract: A wireless power transmission device for transmitting power from a power source to a load includes a three-dimensional source conductive element that is electrically coupled to the power source and that induces an alternating current therein. A first three-dimensional resonating conductive element surrounds the source conductive element, but is physically decoupled therefrom and resonates in response to the alternating current induced in the source conductive element. A second three-dimensional resonating conductive element is physically spaced apart from the first three-dimensional resonating conductive element and resonates in response to an oscillating field generated by the first three-dimensional resonating conductive element. A three-dimensional load conductive element is within the second three-dimensional resonating conductive element, but is physically decoupled therefrom.

Abstract: A wireless power transmission system includes a planar source conductor configured to generate a first periodically fluctuating electromagnetic near field in response to an alternating current received from the power source. A planar resonant source element is coplanar with the planar source conductor and has a first resonant frequency. The planar resonant source element has a Q factor that is at a maximum at the first resonant frequency. A planar resonant load element resonates at the first resonant frequency. A planar load conductor is electromagnetically coupled to and coplanar with the planar resonant load element and generates a current in response to the second periodically fluctuating electromagnetic near field from the planar resonant load element.

Abstract: A multilayer antenna including a first microstrip patch positioned along a first plane, a second microstrip patch positioned along a second plane that is substantially parallel to the first plane, and a ground plane having a slot formed therein. The multilayer antenna also includes a microstrip feeding line for propagating signals through the slot in the ground plane and to the second microstrip patch and a backlobe suppression reflector for receiving some of the signals and reflecting the signals to the slot in the ground plane.

Abstract: The present invention includes an apparatus including a thin film resistor. The thin film resistor includes a resistive component, a body, and a reactant. The resistive component includes a nickel-composite material. The body has a predetermined, sturdy shape. The body carries the resistive component. The reactant manipulates the body to enable the resistive component to adhere to the body.