7results about "Indoor communication adaptation" patented technology

A communication device includes a non-conductive track, an antenna element, a first rotating wheel, and a second rotating wheel. The antenna element is disposed on the non-conductive track. The first rotating wheel and the second rotating wheel drive the non-conductive track according to a control signal to adjust a position of the antenna element. The communication device can provide a nearly omnidirectional radiation pattern.

Provided is a radio wave reflector that can reflect radio waves while the intensity thereof is maintained and that can maintain the scenery. The radio wave reflector of the present invention is a radio wave reflector for reflecting radio waves, wherein the intensity of a reflective wave as specular reflection of an incident wave is −30 dB or more relative to the intensity of the incident wave at a frequency, and the radio wave reflector has a total light transmittance of 65% or more as measured using a standard illuminant D65.

A wall module for a building control system includes a back plate with one or more mounting features for mounting the backplate to a wall. A main body includes one or more attachment features for removably attaching the main body to the back plate. The main body also includes a front side and a back side, wherein at least part of the front side is formed by a front plate. A display is housed by the main body in a display cavity that is defined at least in part by the front plate, and wherein at least part of the display is viewable from the front side. An antenna is housed by the main body in an antenna cavity that is defined at least in part by the front plate.

Antenna device (1) configured for wireless positioning. The antenna device comprises a ground plane (10) having a polygonal shape comprising at least 4 side edges (11). A plurality of chip antenna elements (20) tuned to a predetermined radio frequency are each singly provided at one of said side edges with a spacing (D) between adjacent ones of said chip antenna elements corresponding to ½ of a wavelength of said predetermined radio frequency. A patch antenna element (30) tuned to said predetermined radio frequency is provided at a center portion of a front side (12) of the ground plane.

The technology described herein relates to radio frequency components based on phase change materials (e.g., chalcogenides) that can be used in unit cells of reconfigurable intelligent surfaces. A tunable device for reconfigurable operation is described, where the phase shift of each unit cell of a reconfigurable intelligent surface is changed by rotating the conductive state of the phase change material. The angle of rotation can be selectively controlled by heating elements that change the portion of the unit cell that is in a lower resistance state relative to its higher resistance state, resulting in a phase shift of the unit cell with respect to a redirected electromagnetic wave. By arranging heating elements underneath the material and appropriately actuating each heating element to change the otherwise locked-in resistance or conductive state within the entire unit cell surface, an analog-like device operation is achieved, providing finer phase shift control for the cells of the reconfigurable intelligent surface.

The present disclosure relates to a frequency selective surface (FSS) structure comprising one or more sheet-like elements, each of which is made of a tunable material (e.g., graphene) switchable between a reflecting state and a non-reflecting (transparent) state in response to an external input applied thereto. The external input may be represented by an electric signal, a thermal action, or their combination. In case of multiple sheet-like elements, they are arranged adjacent to each other, and each of them is provided with an independently controlled electrically conductive sub-structure which is arranged so as not to interfere with the transparent state of the sheet-like element. The FSS structure may be installed in an antenna apparatus to provide the possibility of adjusting its radiation pattern.

An antenna is provided. The antenna comprises a dielectric lamina having a first face and a second face opposite the first face. The antenna further comprises a groundplane on the first face of the dielectric lamina, wherein the groundplane is a planar conductive groundplane comprising first and second L-shaped apertures. The antenna further comprises a microstrip transmission line on the second face of the dielectric lamina.