An antenna module Includes a first substrate, a second substrate, the second substrate including at least one cavity at one of the first main surface. The first substrate includes at feast an RF antenna element and/or an RF chip and/or an RF conductive trace, which are arranged on the first main surface of the substrate. The first substrate is connected, with its first main surface, to the first main surface of the second substrate so that the RF elements project into the at least one cavity.

The present disclosure relates to: a communication technique for converging an IoT technology with a 5G communication system for supporting a higher data transmission rate beyond a 4G system; and a system therefor. Specifically, the present invention provides a glass structure comprising: a glass formed to be permeable to radio waves; and a lens disposed on one side of the glass so as to change the incident angle of radio waves incident to the one side of the glass.

A method for providing control of surface waves propagating on a surface includes forming a surface treatment on the surface, wherein the surface treatment is configured to achieve a tensor surface admittance distribution matrix on the surface determined according to a modified transformation electromagnetics (tEM) equation.

This application discloses an antenna system, includes: a ground plate, at least one antenna pair disposed on the ground plate, and a decoupling assembly disposed on a radiation surface of the antenna pair; where the antenna pair includes a first antenna and a second antenna; the decoupling assembly is configured to adjust antenna radiation directions of the first antenna and the second antenna. In this application, the following problem is resolved: A poor effect is achieved when coupling between antennas is reduced by using a slit because there are many electronic elements in a mobile terminal and the slit is easily affected by surrounding electronic elements. Antenna radiation directions of the antennas are changed by using the decoupling assembly disposed on the radiation surface of the antenna pair, thereby improving isolation between the antennas and antenna radiation efficiency.

The disclosure relates to a pre-5th-Generation (5G) or 5G communication system for supporting higher data rates beyond 4.sup.th-Generation (4G) communication system such as long term evolution (LTE). The beamforming device in a wireless communication system may include an antenna array, a communicator configured to perform beamforming of the antenna array by applying a phase pattern for forming a plurality of beams, and a lens configured to adjust phases of respective incident signals by using the plurality of beams and emit output signals, wherein the lens includes unit cells corresponding to the phase pattern. Accordingly, the transmission device and method can reduce a distance between an antenna and a lens in a wireless communication system.

The invention discloses a filtering antenna for wearable devices, which includes a top dielectric substrate, a bottom dielectric substrate, an antenna radiation unit, a top metal ground, a bottom metal ground, and an artificial magnetic conductor structure. The antenna radiation unit is printed on an upper surface of the top dielectric substrate, the top metal ground is printed on a lower surface of the top dielectric substrate, the artificial magnetic conductor structure is etched on an upper surface of the bottom dielectric substrate, and the bottom metal ground is printed on a lower surface of the bottom dielectric substrate. The antenna radiation unit is formed by a circular patch and a microstrip coupling feed stub structure. The invention has the advantages of miniaturization, easy integration, low profile, high gain, anti-interference, may work in the 5.8-GHz ISM frequency band, may be used in wearable devices, has filtering effect etc., and is suitable in the field of human body wireless local area network communications.

A rotatable reflectarray antenna system and methods for reconfiguring electromagnetic (EM) characteristics of the reflectarray antenna are provided. The rotatable reflectarray antenna includes a plurality of rotatable reflecting units coupled with each other; and an actuator system coupled with the plurality of rotatable reflecting units and configured to rotate the reflecting units with respect to axes of the reflecting units. Each rotatable reflecting unit includes a substrate and a plurality of reflectarray patterns disposed on surfaces of the substrate and each reflectarray pattern includes a plurality of reflectarray elements. The actuator system is configured to rotate the plurality of reflecting units to different operational positions such that when layout of the plurality of reflectarray patterns on the plurality of reflecting unit is changed, at least one EM characteristic of the reflectarray antenna is reconfigured.

Antennas such as flat panel, leaky wave antennas with directional coupler feeds and waveguides are disclosed. In one example, an antenna includes a surface having antenna elements, a guided wave transmission line, and a coupling surface. The guided wave transmission line provides a guided feed wave. The coupling surface is between and separates the guided wave transmission line and the surface having antenna elements. The coupling surface controls coupling of the guided feed wave to the antenna elements. The coupling surface can also spatially filter the guided feed wave to provide a more uniform power density for the antenna elements. The guided feed wave can be a high power density electromagnetic wave or a density radially decaying electromagnetic wave.

An electronic device is provided. The electronic device may include a printed circuit board (PCB) having a ground, an antenna, a communication circuit electrically connected to the antenna through a first feeding line, a sensor module electrically connected to the antenna through a second feeding line, a first capacitor disposed on a shorting line connecting the antenna and the ground, and having a first capacitance, a second capacitor disposed on the shorting line and having a second capacitance, and a frequency-selective circuit disposed on the shorting line and selectively delivering a signal to the first capacitor or the second capacitor.

Antenna (1) for railway vehicles comprising: a plurality of photonic band gaps PGB cells (2), placed adjacent each other and made of a layer of low dielectric properties material placed on a metal ground plane (4), wherein each photonic band gap cell (2) form a reflector (6) of the antenna (1); a plurality of first metallic bars (8), placed on top of the PBG cells (2); a plurality of second metallic bars (10), each embedded, at least partially, in the thickness of the low dielectric properties material;
wherein the second metallic bars (10) are each roughly perpendicular to the respective reflector (6).