Abstract:
A lighting device (such as a LED bulb) has a light source (18), a base part (12) and an upper part (62) mounted over the base part (12) with an internal volume (64) defined between them. Within the internal volume (64) there is a two-segment antenna. A first antenna segment (40) extends outwardly from the base part (12) towards the internal volume (64) and a second antenna segment (50) is held by the upper part (62) and mounted partially over the first antenna segment (40). The first and second antenna segments (40, 50) are physically separated but electrically coupled.
Abstract:
A detector for detecting terahertz electromagnetic radiation comprises a substrate and a pair of electrically isolated detector elements supported thereon. Each detector element comprises a pair of antenna elements having a gap therebetween and a switch element comprising one or more pieces of photoconductive semiconductor material connected between the antenna elements across the gap. The pairs of antenna elements of the respective detector elements are configured so that, when the switch element is conductive, current is generated between the antenna elements by polarisation components of incident terahertz electromagnetic radiation having polarisation directions in respective sensing directions that are perpendicular, thereby providing simultaneous detection of perpendicular polarisation components of incident terahertz electromagnetic radiation.
Abstract:
A patch antenna comprises a multilayer printed circuit board that includes a calibration network, an array of patch radiators and a feed network. In some embodiments, the multilayer printed circuit board includes a plurality of dielectric substrates, wherein the array of patch radiators is provided on a dielectric substrate different from the dielectric substrate on which the calibration network is provided, and the dielectric substrate provided with the array of patch radiators is provided above the dielectric substrate provided with the calibration network.
Abstract:
An ACT film has a plurality of rectenna, each having having an antenna and a diode. The ACT film is manufactured using nanoimprint lithography and roll-to- roll processes. An imprint template is overlaid on a feedstock that has two metal layers separated by one or more oxide layers. The feedstock is etched to expose the lower metal layer. The lower metal layer is undercut to create a discontinuity in the lower metal layer to avoid a short to the diode in the rectenna. A metamaterial film is also made. To complete manufacture of the ACT film, the rectenna film and the metamaterial film are aligned to ensure the rectennas in the rectenna film are located over the holes in the metamaterials in the metamaterial film. Once aligned, the rectenna film and the metamaterial films are bonded together.
Abstract:
Examples of an integrated slot antenna are described. The integrated slot antenna comprises a first slot, a second slot and a separating member. The first slot is an open-ended slot and is coupled to a first antenna member to form a first slot antenna. The first slot antenna operates in a first predetermined range of frequencies. The second slot is a close-ended slot and is separated from the first slot by the separating member.
Abstract:
Systems, methods, and devices relating to an antenna element and to an antenna array. A three level antenna element provides wideband coverage as well as dual polarization. Each of the three levels is a substrate with a conductive patch with the bottom level being spaced apart from the ground plane. Each of the three levels is spaced apart from the other levels with the spacings being non-uniform. The antenna element may be slot coupled by way of a cross slot in the ground plane. The antenna element, when used in an antenna array, may be surrounded by a metallic fence to heighten isolation from other antenna elements.
Abstract:
A metal chassis for a mobile device that is configured to transmit a signal of a wavelength. A first side of the chassis faces the inside of the mobile device and includes a first aperture that has a dimension that comprises a first subwavelength width of a slot in the chassis. A second side of the chassis faces free space and includes a second aperture that has a dimension that comprises a second subwavelength width of the slot in the chassis. A channel connects the first aperture and the second aperture. The slot has a length dimension and the channel may be centered along the length dimension. The channel is configured to support a transverse electromagnetic mode for propagation of the signal from the first aperture through the channel to the second aperture. As a part of a mobile device the chassis acts as a secondary radiator for the mobile device.
Abstract:
Disclosed are various embodiments of systems and methods for transmitting guided surface waves that illuminate a defined region. In one embodiment, such a method comprises installing a plurality of guided surface waveguide probes (PI, P2, P3, P4, P5, P6) across a defined region having set boundaries, and setting respective frequency values of operation for the plurality of guided surface waveguide probes that allow for respective service areas to be defined that in the aggregate cover the defined region with guided surface waves.
Abstract:
A semiconductor device that generates or detects terahertz waves includes a semiconductor layer that has a gain of the generated or detected terahertz waves; a first electrode connected to the semiconductor layer; a second electrode that is arranged at a side opposite to the side at which the first electrode is arranged with respect to the semiconductor layer and that is electrically connected to the semiconductor layer; a third electrode electrically connected to the second electrode; and a dielectric layer that is arranged around the semiconductor layer and the second electrode and between the first electrode and the third electrode and that is thicker than the semiconductor layer. The dielectric layer includes an area including a conductor electrically connecting the second electrode to the third electrode. The area is filled with the conductor.
Abstract:
A method of forming a self-supported electronic device, including depositing a sacrificial layer on a first surface substrate, wherein the sacrificial layer is substantially soluble in a first solvent. At least one device layer is deposited in a desired pattern on top of the sacrificial layer. The at least one device layer is substantially insoluble in the at least one device layer. The sacrificial layer is at least partially dissolved in the first solvent to release at least a portion of the first device layer from the substrate. The at least one device layer removed from the substrate forms a self-supported electronic device, which is a thin film electronic device having at least a portion thereof that is not supported by a material carrier.