Electronics and Telecommunications Research Institute

Sang Il Kwak

Jong Hwa Kwon

Dong-Uk Sim

Hyun Ho Park

Provided a reverberation chamber including a pair of a transmitting and receiving antenna and a reflection plate configured to reflect an electromagnetic wave output from the transmitting and receiving antenna to a working volume in a beam direction to improve a field uniformity of the working volume in the reverberation chamber and increase an applicability of the reverberation chamber.

Reverberation chamber

Disclosed is an electromagnetic wave reverberation chamber including a column-type mode stirrer including a plurality of plate-shaped electromagnetic wave reflectors connected by a metal column provided on a bottom of the electromagnetic wave reverberation chamber, a ceiling-type mode stirrer including a plurality of plate-shaped electromagnetic wave reflectors connected by a metal column provided on a wall surface of the electromagnetic wave reverberation chamber and disposed around a ceiling of the electromagnetic wave reverberation chamber, and a pyramidal mode stirrer including a plurality of pyramid-shaped electromagnetic wave reflectors and disposed on a wall surface of the electromagnetic wave reverberation chamber.

Electromagnetic wave reverberation chamber

Provided is a cover accessory for a wireless communication device, including an electromagnetic suppressing pattern layer on a surface adjoining at least one surface on which an electromagnetic wave is irradiated from the wireless communication device, wherein the electromagnetic suppressing pattern layer includes a first dielectric layer and a frequency selective surface (FSS) pattern with a unit cell having electromagnetic surface resistance periodically repeated thereon, and the FSS pattern is provided by etching the first dielectric layer to inject an FSS pattern material or by printing the FSS pattern material on the first dielectric layer.

Cover accessory including electromagnetic wave suppression function for wireless communication device

Provided is a magnetic shielding sheet. The magnetic shielding sheet according to an embodiment of the inventive concept may include a magnetic sheet including a magnetic material, a plurality of first metal strips provided on the magnetic sheet in a first direction, and a plurality of second metal strips provided on the magnetic sheet in a second direction different from the first direction. According to the inventive concept, a magnetic field applied from the outside may be efficiently shielded by properly arranging the metal strips on the magnetic sheet.

Magnetic shielding sheet and manufacturing method thereof

An apparatus for use in a communication device with an antenna protects a body from electromagnetic fields. The apparatus includes a sensing unit to sense a surrounding environment of the communication device, a variable element to perform a variable operation according to a voltage or current applied thereto. The apparatus further includes a variable element control unit to control the voltage or current according to the surrounding environment sensed by the sensing unit to cause the variable element to perform the variable operation, and an intelligent periodic structure coupled with the variable element, the intelligent periodic structure being configured to change an operation frequency of the wireless communication device according to the variable operation of the variable element and adjust a radiation pattern direction of the antenna.

Apparatus and method for body protection from electromagnetic fields

An apparatus for protecting a human body from electromagnetic waves includes: a radiator including an antenna; and a periodic structure that is combined with the radiator to form a radiation unit and has a plurality of unit cells periodically arranged, wherein each of the unit cells of the periodic structure contains a ground layer; an electromagnetic bandgap (EBG) board formed on the ground layer and serving as a dielectric spacer; and an EBG pattern made of metal and formed on the EBG board.

Growing community of inventors

Daejeon, South Korea

Sang Il Kwak