Electronics and Telecommunications Research Institute

Jong Hwa Kwon

Dong-Uk Sim

Hyung Do Choi

Jung Hwan Hwang

Sang Woon Kwak

Sang Il Kwak

Chang Hee Hyoung

Je Hoon Yun

Chang-Joo Kim

Seong-Min Kim

In Kui Cho

Jung Ick Moon

Sang-Won Kim

Hyun Seo Park

Jae Ick Choi

Soon Ik Jeon

Su Na Choi

Sang Bong Jeon

Byung Chan Kim

Hyun Ho Park

Ho Gyu Yoon

Ae Kyoung Lee

Seong Ho Son

Tae Yune Lee

Kwang Se Lee

Duk Soo Kwon

Provided is a laser scanner. The laser scanner includes a laser transmitter configured to output a laser radiated towards an object, a laser receiver configured to receive a laser reflected from the object, and an oscillating mirror of which a mirror surface is coated with a thin metal film to reflect the received laser reflected from the object and be penetrated by an electromagnetic wave incident from an outside the laser scanner. The received laser reflected from the object is reflected by the mirror surface of the oscillating mirror coated with the thin metal film and received by a laser receiver, and the electromagnetic wave incident from the outside the laser scanner penetrates the mirror surface of the oscillating mirror and then dissipates.

Laser scanner

An apparatus for electromagnetic wave evaluation may include: an electromagnetic wave non-reflecting outer structure in which electromagnetic wave absorbers are installed on interior walls and an evaluation space is formed therein; a building-simulating structure which is installed in the evaluation space inside the electromagnetic wave non-reflecting outer structure and in which electromagnetic wave absorbers capable of adjusting a quality factor are installed; a transmitting end installed inside or outside the building-simulating structure in the evaluation space and transmitting an electromagnetic wave; and a receiving end installed outside or inside the building-simulating structure in the evaluation space.

Electromagnetic wave evaluation apparatus with adjustable quality factor

An electromagnetic wave measurement system may include: a reference receiving device; a plurality of auxiliary receiving devices; and a control device connected to the reference receiving device and the plurality of auxiliary receiving devices, wherein the reference receiving device has a wider dynamic range than the plurality of auxiliary receiving devices, the control device collects a frequency-specific measurement value from each of the reference receiving device and the plurality of auxiliary receiving devices, and the frequency-specific measurement value of each of the auxiliary receiving devices is calibrated based on the frequency-specific measurement value of the reference receiving device.

Method for measurement of electromagnetic field, and system therefor

A probe antenna, a probing system, and a power density measuring method to measure a power density of a near-field electromagnetic field are disposed. The probe antenna includes a board, and a conductor transmitting line formed on the board, having a constant line width, and formed in a polygonal shape or in a closed-curve shape. The conductor transmitting line is divided into a first transmitting line and a second transmitting line that are separated from each other, and includes a first receiving port formed with one end of the first transmitting line and one end of the second transmitting line and a second receiving port formed with another end of the first transmitting line and another end of the second transmitting line.

Probe antenna, probing system, and power density measuring method for measuring power density in near-field electromagnetic field

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 an apparatus for reducing an electromagnetic wave in a wireless power transmitter using a reducing coil, the apparatus that may cancel external emission of a magnetic field formed at a transmission coil using the reducing coil based on induced electromotive force.

Apparatus for reducing electromagnetic wave in wireless power transmitter using reducing coil

An exemplary embodiment of the present invention discloses a microwave signal processing method and apparatus which precisely focus a microwave onto a specific part of a biological tissue and rapidly images a temperature distribution in the biological tissue generated thereby.

Method and apparatus for focusing microwave and thermally imaging for biological tissue

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

A device for controlling exposure of electromagnetic waves from a base station collects a power value received from at least one base station together with position information using a plurality of terminals in a controlled area; maps the received power value collected from the terminals on a plurality of subareas in the controlled area based on position information collected from the terminals; calculates a power density for respective frequency bandwidths in the respective subareas by using the received power value of the terminals provided in the respective subareas; and calculates a specific absorption rate of electromagnetic waves in a human body in the respective subareas by using a power density value for respective frequency bandwidths in the respective subareas.

Device and method for controlling exposure of electromagnetic waves from base station

Provided is a magnetic field measuring device including a first sensor unit which includes a first coil sensor configured to output a first sensor signal, a second sensor unit which includes a second coil sensor configured to output a second sensor signal and disposed in a direction perpendicular to the first coil sensor, a third sensor unit which includes a third coil sensor configured to output a third sensor signal and disposed in a direction perpendicular to the first and second coil sensors, and a digital signal processor outputs magnetic flux density based on a voltage difference between the first and fourth nodes, wherein the first to third sensor units respectively output first to third output signals in which specific voltages of the first to third sensor signals are maintained for a predetermined period of time.

Triaxial coil sensor and magnetic field measuring device including the same

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

Disclosed are method and apparatus of generating noise that effectively performs performance evaluation of electronic equipment in a real environment by generating the noise having a statistic characteristic of real noise in a laboratory environment, by estimating a noise parameter set by measuring the noise and generating random noise data using a random noise data generation function having a statistic characteristic corresponding to the noise parameter set to generate radio noise.

Methods and apparatuses for generating real-environment noise using statistical approach

A method of preparing a carbon nanotube composite with metal particles on a surface thereof, including: introducing an acylhalide group to the surface, causing a reaction of the acylhalide group with an amine group of a polysiloxane to bond the polysiloxane to the surface by the amide groups, and introducing metal particles to other functional groups of the polysiloxane to bond the metal particles to the surface of the carbon nanotube composite.

Method of preparing carbon nanotube composite surface having metal particles

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.

Growing community of inventors

Daejeon, South Korea

Jong Hwa Kwon