Invention relates to a radome casing and method for its manufacturing. The radome casing comprises walls (6, 11) of composite material which includes reinforcement fibers (8) and matrix resin (19) binding the fibers together. The walls include a radiation transmission window (11) through which the radiation of a radome antenna passes when the radome antenna (2) is mounted inside the radome casing (1). The amount of fibers in the radiation transmission window (11) is reduced to be less than 40-5% of the amount of fibers elsewhere in the casing walls (6). The reduction of reinforcement fibers in the radiation transmission window (11) reduces attenuation of the high frequency radiation.

A gradient permittivity film comprises (a) a first permittivity layer comprising a first continuous matrix of a first material having a first relative permittivity (ε.sub.r1) and a second component having a second relative permittivity (ε.sub.r2) dispersed in the first continuous matrix, the first permittivity layer having a first effective layer relative permittivity (ε.sub.1) and a thickness (T.sub.1); and (b) a second permittivity layer having a second effective layer relative permittivity (ε.sub.2) and a thickness (T.sub.2) disposed on the first permittivity layer T.sub.1=0.8(t.sub.1) to 1.2(t.sub.1), where t.sub.1=(I); T.sub.2=0.8(t.sub.2) to 1.2 (T.sub.2), where T.sub.2=(II).

[00001]$\begin{array}{cc}{t}_1=\frac{c}{4.Math.f.Math.\sqrt{{\mathrm{.Math.}}_1}}& \left(I\right)\\ t_2=\frac{c}{4.Math.f.Math.\sqrt{{\mathrm{.Math.}}_2}}& \left(\mathrm{II}\right)\end{array}$

Invention relates to a radome casing and method for its manufacturing. The radome casing comprises walls (6, 11) of composite material which includes reinforcement fibers (8) and matrix resin (19) binding the fibers together. The walls include a radiation transmission window (11) through which the radiation of a radome antenna passes when the radome antenna (2) is mounted inside the radome casing (1). The amount of fibers in the radiation transmission window (11) is reduced to be less than 40-5% of the amount of fibers elsewhere in the casing walls (6). The reduction of reinforcement fibers in the radiation transmission window (11) reduces attenuation of the high frequency radiation.

A multi-layer antenna assembly and related antenna array are provided. In one aspect, a multi-layer antenna assembly includes a first radiating layer(s) and a second radiating layer(s). The second radiating layer(s) is provided below and in parallel to the first radiating layer(s). The second radiating layer(s) overlaps at least partially with the first radiating layer(s). In this regard, an electromagnetic wave radiated vertically from the second radiating layer(s) is horizontally guided by an overlapping portion of the first radiating layer(s). In another aspect, an antenna array can be configured to include a number of multi-layer antenna assemblies to enable radio frequency (RF) beamforming. By employing the multi-layer antenna assemblies in the antenna array, it may be possible to flexibly and naturally steer an RF beam in a desired direction(s) without causing oversized side lobes, thus helping to improve power efficiency and performance of the antenna array.

Provided is a protective material that protects a wireless communication portion for wireless communication, comprising a substrate formed of a foam synthetic resin and a coating layer of a polyurea resin covering at least a front side surface of the substrate. The wireless communication device includes a wireless communication portion for wireless communication and a protective material.

A system for a vehicle comprises a body component of the vehicle that is formed of a microcellular foam and optionally having one or more decorative layers applied thereto and a radar device arranged behind the body component and configured to transmit/receive radar waves therethrough. A method of manufacturing a body component of a vehicle comprises obtaining a molten resin, introducing a gas or a chemical foaming agent into the molten resin to form a microcellular foam, injecting molding the microcellular foam by injecting the microcellular foam into a mold to form the body component, removing the body component from the mold, optionally applying one or more decorative layers to the body component, and arranging the body component in front of a radar device of the vehicle.

The present disclosure relates to a gradient structure (100) for transmitting and/or reflecting an electromagnetic signal. The gradient structure comprises a plurality of interconnected cells (110). Each cell comprises a through cavity (112) surrounded by walls (111), wherein the walls of each cell have a gradually varying thickness along a longitudinal direction of each cell. The present disclosure also relates to a cover structure (200) comprising the gradient structure (100), a system (300) comprising the cover structure (200), a structure element (400) having integrated therein the system (300) and to a method for optimizing the transmittance and/or reflectance of an electromagnetic signal of a gradient structure.

A wireless communication equipment installation for wireless communication equipment includes a 5G New Radio (NR) antenna and a shroud member. The 5G NR antenna includes a radiating element configured to transmit radio signals at frequencies greater than 24 GHz. The shroud member comprises a polyvinyl chloride (PVC) substrate. The radiating element is configured to emit and receive radio signals through the shroud member.

For example, an apparatus may include a Printed Circuit Board (PCB); a Multiple-Input-Multiple-Output (MIMO) radar antenna on the PCB, the MIMO radar antenna comprising a plurality of Transmit (Tx) antenna elements configured to transmit Tx radar signals, and a plurality of receive (Rx) antenna elements configured to receive Rx radar signals based on the Tx radar signals; and a surface wave mitigator connected to the PCB, the surface wave mitigator configured to mitigate an impact of surface waves via the PCB on a radiation pattern of the MIMO radar antenna.

An apparatus comprising an enclosure for an antenna arrangement including physically integrated parts including a first part of relatively dense, injection moldable plastic and a second part of less dense, injection moldable plastic. The first part and the second part are contiguous.