Abstract:
PURPOSE: An antenna radiation power measurement device and a method are provided to measure a radiation power of a large size high gain antenna in a small or a middle sized chamber which does not satisfy a far field condition. CONSTITUTION: An antenna radiation power measurement device comprises a chamber (100), a source antenna (105), a test antenna (107), a rotation axis (109), and a roll positioner (111), and a turn table (115). The chamber attaches an absorber to a wall. The source antenna and the test antenna are arranged inside the chamber. The rotation axis controls an arrangement angle of the test antenna upward and downward. The roll positioner rotates the test antenna around the rotation axis, and controls the arrangement angle upward and downward. The turn table rotates to a right and a left direction which cross at right angles to an upper and a lower direction inside the chamber.
Abstract:
PURPOSE: An apparatus for promoting a growth expression factor of a follicular cell is provided to expose human dermal papilla cells to SAR so that a growth expression factor of a cell promotes the growth and the regeneration of the hair including IGF1. CONSTITUTION: An apparatus for promoting a growth expression factor of a follicular cell comprises a super high frequency output unit(22) and a control unit(40). The control unit controls the super high frequency output unit. The super high frequency output unit projects high frequency wave to the follicular cell of the head to induce a growth expression factor. The super high frequency output unit is formed in at least a housing which is hemispheric and covers the head or a housing which is open to project high frequency wave to a certain area. [Reference numerals] (40) Control unit; (AA) Super high frequency output unit; (BB) Cooling water; (CC) Blowing fan; (DD) Monitor
Abstract:
저항성 재질을 이용한 공진형 전자파 흡수체가 개시된다. 본 발명은 금속 도체층으로 형성된 접지층과 접지층 상에 형성된 유전체층, 그리고 유전체층 상에 형성된 저항성 재질로 이루어진 단위셀 패턴을 포함하는 둘 이상의 단위셀이 주기적으로 배열되어 있는 전자파 흡수체에 관한 것이다. 본 발명에 따르면, 일반적인 전자파 흡수체에 비해 제조 과정이 간단하고, 흡수 주파수 대역 및 흡수 특성을 쉽게 조정할 수 있다. 게다가, 기존의 평판형 공진형 전자파 흡수체에 비해 더 얇은 두께로 제작이 가능한 효과가 있다. 전자파 흡수체, 공진 주파수, 대역폭, 저항성 재질, 단위셀, 주기
Abstract:
PURPOSE: A resonant electric wave absorber is provided to simplify a manufacturing process using a structure of an electromagnetic band- gap and a resistive material. CONSTITUTION: An electromagnetic wave absorber includes periodically arranged unit cells(100). Each unit cell includes a ground layer(115), a dielectric layer(110) and a unit cell pattern(105). The ground layer is made of the metal conductor. The dielectric layer is formed on the ground layer. The unit cell pattern is formed on the dielectric layer. The unit cell pattern is made of resistive materials and includes a basic pattern and a semi-orthogonal dipole patch. The basic patch is positioned in the center of the unit cell pattern. The semi-orthogonal dipole patch is arranged in upper, lower, left, and right sides.
Abstract:
A metal structure, a unit structure, and a method for forming the metal structure are provided to reduce a surface current on a metal structure of an electronic product by using an electromagnetic band gap. A metal structure for preventing electrostatic discharge includes an electromagnetic band gap(100), a metal structure(110), an opening part(120), and a unit structure(130). The opening part is formed a front surface of the metal structure. The electromagnetic band gap suppresses a current generated by the electrostatic discharge. The electromagnetic band gap is formed by an arrangement of the unit structure. The unit structure has a triangle or a rectangular shape. The electromagnetic band gap is formed by using a metal patch and a dielectric. The dielectric is formed between the electromagnetic band gap and a metal plate. The dielectric supports the electromagnetic band gap.
Abstract:
본 발명은 도체 상에 바로 부착하여 사용할 수 있으며, 단순한 평판 구조로서 제작 및 비용면에서 저렴한 인공자기도체를 이용한 무선 인식용 태그 안테나 및 그 태그 안테나를 이용한 무선인식 시스템을 제공한다. 그 무선 인식용 태그 안테나는 급전 포트가 필요없는 무선 인식용 칩(chip)을 포함하고, 1 유전체로 형성된 기판; 기판 하부에 형성된 도전성의 접지층(ground layer); 기판 상에 형성된 인공자기도체층(artificial magnetic conductor(AMC) layer); 및 인공자기도체층 상에 부착되고 무선 인식용 칩을 구비한 태그 안테나(tag antenna);를 포함한다.
Abstract:
A tag antenna mountable on metallic objects using an AMC(Artificial Magnetic Conductor) for wireless identification and a wireless identification system using the same are provided to adjust a frequency band and an identification distance of the tag antenna by modifying a pattern of an AMC layer into various forms by not forming vias in the AMC. A tag antenna mountable on metallic objects using an artificial magnetic conductor(100) includes a substrate(140), a conductive ground layer, an AMC layer(160), and a tag antenna(200). The conductive ground layer is formed in a lower part of the substrate. The artificial magnetic conductor layer is formed on the substrate. The tag antenna includes a wireless identification chip(210). The chip is adhered on the AMC layer. The tag antenna is attached to a conductor. The tag antenna has a flat-panel type structure. The AMC layer has patterns in which conductive unit cells having predetermined shapes are arrayed at regular intervals.
Abstract:
A terminal using metamaterials and a method for reducing electromagnetic waves therein are provided to reduce the amount of electromagnetic waves absorbed into the human body by applying metamaterials to the antenna of a portable or wearable terminal and forming the antenna radiation pattern as a half moon or fan-shape. A terminal comprises an electromagnetic wave reduction part(110) and an antenna(120). The electromagnetic wave reduction part(110) is formed of metamaterials, such as artificial magnetic conductors. The antenna(120) is installed at the opposite side of a body contact portion(130) on the basis of the electromagnetic wave reduction part(110).