The present invention discloses a nanocomposite coating composition and coating method for antenna reflector. The nanocomposite coating composition comprises a polymer matrix resin and a plurality of graphene nanoparticles. The plurality of graphene nanoparticles is added to acetone solvent and dispersed using an ultrasonic disperser. An appropriate amount of prepared epoxy resin is added to the mixture of graphene and acetone solvent and stirred using a mechanical stirrer for certain period. The sonication process is applied to the graphene incorporated resin mixture for a duration of about 30-120 minutes. The acetone in the mixture is removed using a magnetic stirrer and a vacuum oven. Further, same hardener is added to the mixture and degassed using vacuum oven to form the nanocomposite coating composition. The nanocomposite coating composition converts an electromagnetically insulated antenna into an electromagnetically conductive antenna for enhancing one or more electromagnetic characteristics of the antenna reflector.

A passive wireless sensor system is disclosed that includes components fabricated from carbon nanotube (CNT) structures. In some situations, the passive wireless sensor system includes a CNT structure sensor and an antenna that communicates wirelessly by altering an impedance of the antenna. The passive wireless sensor system includes a non-battery-powered energy storage device that harvests energy from carrier signals received at the antenna. The antenna and the energy storage device can be formed from CNT structures.

An electronic device includes a housing including a front plate and a rear plate disposed opposite the front plate, and a display disposed in a space between the front plate and the rear plate, and disposed at least partially along the front plate. The electronic device further includes a first antenna structure disposed in the space and configured to transmit or receive a first signal in a first frequency band, wherein the first antenna structure includes at least one first conductive pattern. The electronic device also includes a second antenna structure disposed in the space without being overlapped with the first conductive pattern when viewed from above the rear plate, and configured to transmit or receive a second signal in a second frequency band different from the first frequency band. In addition, the electronic device includes a conductive sheet disposed in the space and on the rear plate. The conductive sheet is physically separated from the first conductive pattern, and at least partially overlapped with the first conductive pattern when viewed from above the rear plate.

A polymer composition comprising a dielectric material distributed within a polymer matrix is provided. The dielectric material has a volume resistivity of from about 0.1 ohm-cm to about 110.sup.12 ohm-cm, wherein the polymer matrix contains at least one thermotropic liquid crystalline polymer, and further wherein the polymer composition exhibits a dielectric constant of about 4 or more and a dissipation factor of about 0.3 or less, as determined at a frequency of 2 GHz.

In aspects of a small cell installation structure, a carbon fiber skeleton provides stability and an attachable framework to mount wireless technology equipment. A formable foam material, such as a polyurethane material, is configured as a formable aesthetic housing around the carbon fiber skeleton, and a hardened polymer coating over the formable foam material is adapted to a shape of the formable aesthetic housing. The hardened polymer coating resists environmental conditions that may otherwise hamper performance of the wireless technology equipment. Additionally, an antenna housing module encloses antennas of the wireless technology equipment, is integrated with the carbon fiber skeleton, and is designed to pass millimeter wave (mmW) spectrum wireless signals.

Wearable antenna systems in the form of suspenders are disclosed. Such communications suspenders may employ antenna elements having a reduced visual signature while maintaining the load bearing functionality of traditional suspenders. The antenna system can establish mesh networking communications and communicatively couple to portable radios via a communications device. Some of the antenna elements may be within the communications suspenders. A plurality of straps are pivotably coupled to an intermediate portion at one end and a demountable fastener at the other end that couples to the user's garment item (e.g., trousers, shorts, skirts, and similar articles). The straps may include RF shielding material positioned to reflect RF radiation that emanates from the antenna elements away from the user. The antenna elements may be formed using a conductive composition that includes fully exfoliated graphene sheets present as a percolated network in a polymer matrix.

A communications node includes an apparel item in the form of a shoulder belt that includes an open state, closed state, and main body. A first portion curvingly extends from the main body. A second portion angularly extends from the main body opposite the first portion. A primary fastener demountably couples the first and second portions together when in the closed state. An antenna element and communications device are positioned within the apparel item. An hub is affixed to the apparel item and configured to receive audio/video input. A battery is positioned adjacent to the apparel item. A control circuit is positioned within the apparel item and coupled to the antenna element, hub, communications device, and battery. The control circuit establishes a self-organizing WAN with a plurality of computing devices each directly, dynamically, and non-hierarchically connected to the WAN; and communicates with the computing devices using the self-organizing WAN.

The present disclosure is directed to antennas for transmitting and/or receiving electrical signals comprising a MXene composition, devices comprising these antennas, and methods of transmitting and receiving signals using these antennas.

The present invention discloses a terahertz metamaterial. The terahertz metamaterial includes a substrate and an electromagnetic loss resonant ring structure disposed on the substrate, where an electromagnetic modulation function is realized on a terahertz band by adjusting different structural sizes and square resistance of the electromagnetic loss resonant ring structure. In the present invention, the electromagnetic loss resonant ring structure is disposed on the substrate, and the electromagnetic modulation function is realized on the terahertz band by adjusting the different structural sizes and square resistance of the electromagnetic loss resonant ring structure, thereby simplifying processing steps of a terahertz device, reducing a processing cost, and enabling a terahertz technology to be widely used in the field of electromagnetic communication.

An apparatus may include a protective screen overlay configured to couple with a screen of a wireless device. The protective screen overlay may be optically transparent. A conductive element is positioned in the protective screen overlay and configured to parasitically couple with an antenna of the wireless device when the antenna is energized. The conductive element may be optically transparent.