An electromagnetic wave transmissive cover includes: a base made of a dielectric material and having transmissiveness to electromagnetic waves; and a reflection hindering layer laminated on at least one of two surfaces of the base in a travel direction of the electromagnetic waves, made of a dielectric material, having transmissiveness to the electromagnetic waves, and hindering reflection of the electromagnetic waves. A wavelength of each electromagnetic wave in the reflection hindering laver is referred to as λ2 and 2π/λ2 is set as a phase constant β.sub.2. An amount of deviation between a phase of a reflected wave reflected on the front interface of the reflection hindering layer in the travel direction and a phase of a reflected wave reflected on the rear interface is referred to as a phase deviation amount β. Thickness L.sub.2 of the reflection hindering layer is set to β/β.sub.2.

The present disclosure relates to articles for transmitting and/or receiving radio waves therethrough having a frequency in the range of 0.5 GHz to 81 GHz. The articles include a thermoplastic resin including a polyamide and provide low signal attenuation of the radio waves transmitted or received therethrough.

An illustrative example sensor device includes a transmitter and a receiver having at least one lobe and at least null. A cover near the transmitter and the receiver includes a surface facing toward the transmitter and the receiver. The surface is at an angle relative to the receiver to direct at least some radiation transmitted by the transmitter and reflected from the surface toward the at least one null of the receiver.

Antenna assemblies are described herein. In particular, described herein are multi-focal-point antenna devices and compact radio frequency (RF) antenna devices. Any of these assemblies may include a primary feed that includes a single patterned emitting surface from which multiple different beams of RF signals are emitted corresponding to different antenna input feeds each communicating with the patterned antenna emitting surface. The antenna assembly is therefore capable of emitting beams in the same direction having different polarizations using a single primary feed.

An electronic device may be provided with wireless communications circuitry and control circuitry. The wireless communications circuitry may include centimeter and millimeter wave transceiver circuitry and a phased antenna array. A dielectric cover may be formed over the phased antenna array. The phased antenna array may transmit and receive wireless radio-frequency signals through the dielectric cover. The dielectric cover may have first and second opposing surfaces. The second surface may face the phased antenna array and may have a curvature. The curvature of the second surface may include one or more recessed regions of the dielectric cover. The one or more recessed regions of the second surface may serve to maximize and broaden the coverage area for the phased antenna array. The first surface may be conformal to other structures in the electronic device.

An electronic device includes a first antenna, a second antenna, and a device cover. The first antenna may be configured to transmit or receive signals at a first frequency, and the second antenna may be configured to transmit or receive signals at a second frequency. The device cover may be configured to enclose at least a portion of the device, the and may have a first thickness in a first area and a second thickness in a second area. The first area may be substantially aligned with a boresight of the first antenna, and the second area may be substantially aligned with a boresight of the second antenna. The first thickness may be different than the second thickness.

This document describes facia, including parts of vehicles, for supporting an ultra-wide radar field-of-view, for example, in automotive contexts. The facia is configured as a radome for supporting an ultra-wide field-of-view with an antenna despite the facia obstructing a field of view. The facia has one exterior surface or interior surface this is a mostly smooth or has a pattern of hemispherical indentations or domes that are configured to reduce reflections off that surface and increase light transmission through the facia. The other of the exterior or interior surface, has a pattern of hemispherical indentations or domes that are configured to reduce reflections off that surface and further increase light transmission through the facia.

A radar sensor module includes a substrate, at least one transmit antenna formed on a surface of the substrate, and at least one receive antenna formed on the surface of the substrate. A radome is disposed over the surface of the substrate and the at least one transmit antenna and the at least one receive antenna, such that a gap is located between the surface of the substrate and an underside of the radome in which a portion of radiation emitted from the at least one transmit antenna can propagate. At least one trench is formed in the underside of the radome and is electromagnetically coupled to the gap, the at least one trench being sized, shaped and positioned with respect to the gap such that the portion of radiation emitted from the at least one transmit antenna is substantially prevented from propagating toward the receiving antenna.

Touch sensor systems and methods are disclosed including a radio frequency antenna that can be placed on or very near the touch pad. The touch pad sensor includes a patterned shielding that shields the touch pad sensor from back-side signals and has opening that are large enough to allow radio frequencies to pass through the touch pad sensor.

Embodiments provide tower-mountable base station antenna enclosure systems to reduce effective wind loads of housed antenna components. The enclosure systems can include wind deflection radomes sized to house antenna components and mountable to tower structures by rotatable couplings. For example, embodiments can have a rotational axis that is substantially transverse to primary wind directions, and the wind deflection structures can be mounted in a manner that permits substantially free rotation around the axis. Such enclosure systems can reduce the wind load of the antenna as deployed on a tower, such that a smaller marginal structural impact can be attributed to deployed antenna components, and the antenna components can be considered as smaller structural loads on the tower.