Abstract:
PURPOSE: A multi input-output antenna for improving the isolation characteristic is provided to prevent the flow of a current between antennas by structurally arranging a split ring resonator at the lower side of a ground surface between a plurality of antenna patterns. CONSTITUTION: A first substrate(110) includes a ground surface and a plurality of separately arranged antenna patterns. A second substrate(120) includes a split ring resonator(121). The split ring resonator is arranged at the lower side of the ground surface between the antenna patterns. A plurality of split ring resonators is periodically arranged on a second substrate. A cut-off frequency band is adjusted according to the length of the split ring resonators.
Abstract:
PURPOSE: A method and system for a postal service reception and delivery are provided to perform the postal service through a portable terminal, a PC, or an IPTV. CONSTITUTION: A mail receiving/delivery server(200) receives postal matters from a mail sender(100). The mail receiving/delivery server delivers the receipted postal matters to a postal matter recipient(300). The mail sender transmit the mail delivery service request to the mail receiving/delivery server through a postal service reception channel. The postal matter recipient receives the postal matter through a delivery channel.
Abstract:
PURPOSE: A three-dimensional model cross section simulating method and an apparatus thereof for reducing the consumption of a memory are provided to easily modify, add and delete the modeling by individually modeling the three-dimensional model. CONSTITUTION: A crossing inspection unit inspects a crossing point with an input stroke and an edge(S102). A cutting section former projects an inspection result to a local coordinate system(S104). A triangle divider performs a triangle division about a formed cutting section. A texture mapping unit maps texture(S108). A cutting section former moves the cutting cross section according to depth(S110). A simulation output unit outputs an internal cutting section(S112).
Abstract:
PURPOSE: A protrusion type hyper lens and a manufacturing method thereof are provided to easily manufacture a protrusion hyper lens by using a conventional concave shaped cylinder type hyper lens. CONSTITUTION: A main lens layer(10) has a concave shaped front side. A board layer(20) supports the main lens layer. The front side central part of the main lens layer is located to be more projected than the surface of the board layer. The height difference between the most projected region and the front side central part of the main lens layer is within a half wavelength. The cross section of the main lens increases from the front side to the rear side. The main lens layer is formed by alternately laminating a dielectric and a metallic foil. The dielectric and the metal have a thickness which is less than 100nm.
Abstract:
An automatic mail pallet transportation system based on RFID and a method thereof are provided to move a pallet smoothly and prevent damage to the pallet by automatically transporting the pallet arriving in an arrival field. An automatic mail pallet transportation method based on RFID comprises: a step for recognizing a tag of a mail pallet(330) which is carried to a gate(300) of an arrival field; a step for setting up a route to sorters(210,220,230,240) which classify the postal matter from the arrival field gate based on information of the recognized tag; and a step for moving the mail pallet to the sorter based on the set-up route and setting up the sorters in a standby state.
Abstract:
본 발명은 도체 상에 바로 부착하여 사용할 수 있으며, 단순한 평판 구조로서 제작 및 비용면에서 저렴한 인공자기도체를 이용한 무선 인식용 다이폴 태그 안테나 및 그 다이폴 태그 안테나를 이용한 무선 인식 시스템을 제공한다. 그 무선 인식용 다이폴 태그 안테나는 급전 포트가 필요없는 무선 인식용 칩(chip)을 포함하고, 제1 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 다이폴 태그 안테나;를 포함하고, 도체 상에 바로 부착하여 용이하게 사용할 수 있다.
Abstract:
A composition for a composite sheet is provided to realize maximized absorptivity at a specific frequency range, while showing high electron wave-shielding property and heat emission property, even in the presence of a low amount of fillers. A composition for a composite sheet comprises: 70-90 wt% of fillers containing 50-90 wt% of soft magnetic metal powder and 10-50 wt% of conductive metal powder; and 10-30 wt% of a polymer matrix resin, wherein the soft magnetic metal powder is sheet-like powder having an aspect ratio of 27.8-37.5, and the conductive metal powder is fibrous powder. The soft magnetic metal powder is at least one selected from the group consisting of Permalloy, Sendust, Ni-Zn ferrite, Mn-Zn ferrite, carbonyl iron, Fe-Si-based alloys and Molypermalloy.
Abstract:
An apparatus and a method for issuing a unified type RFID-bar code tag are provided to maximize efficiency of logistics process by automating the process of issuing the unified type RFID-bar code tag, which can be used for both the bar code label and the RFID label. An apparatus for issuing an unified type RFID(Radio Frequency IDentification)-bar code tag comprises a bar code label roller(102), an RFID label roller(110), a laser print toner, an RFID writing unit(107), a bar code sticker attaching unit(105), a laser print controller(203), an RFID record controller(202), a sensing data processor(204), a roller speed controller(205) and a bar code sticker attaching controller(206). The bar code label roller is driven with preset movement speed according to a size of the bar code label. The RFID label roller is driven with preset movement speed according to a size of the RFID label. The laser print toner prints bar code information received at the bar code label. The RFID writing unit writes RFID input information, synchronized with the bard code input information, at the RFID label. The bar code sticker attaching unit attaches the printed bar code label at the RFID label tag where the RFID input information is recorded. The laser print controller performs a control operation for printing the bar code input information at the bar code label. The RFID record controller performs a control operation for recording the bard code input information and synchronized RFID input information at the RFID label. The sensing data processor receives information on a size of the bar code label and the RFID label and movement speed, and calculates a drive speed of each roller for the bar code label and the RFID label by using the received information. The roller speed controller controls each roller for the bar code label and the RFID label according to the calculated drive speed for synchronizing the movement speed of the bar code label with that of the RFID label. The bar code sticker attaching controller controls attachment of the printed bar code label synchronized with the movement speed of the RFID label.
Abstract:
본 발명은, FSS에 루프 구조를 적용시켜 면적을 줄이고, FSS를 구성하는 루프, 유전체, 도체 등의 기하학적 길이와 두께, 재질, 및 단위셀의 층 수를 조절함으로써 요구되는 필터링 대상 주파수 대역에 대하여 필터링이 가능하도록 하고, 요구되는 필터링 대상 주파수를 중심으로 일정한 주파수 대역폭을 갖도록 한 단일 주파수 대역 투과/차단용 FSS 공간 필터에 관한 것으로, 공간 채움 곡선(space-filling curve) 원리를 이용하여 기하학적으로 얽힌 루프; 상기 루프를 지지하기 위한 기판; 및 상기 루프와 상기 기판으로 이루어진 단일 주기의 단위셀(unitcell)을 갖되, 상기 루프의 기하학적 모양과, 상기 단위셀의 배열 및 주기와, 상기 루프 및 상기 기판의 재질 특성에 따라 원하는 주파수를 선택적으로 투과/반사시킬 수 있도록 구성하며, 최소한의 면적을 차지하면서 상기 루프의 길이를 연장하기 위해, 상기 루프가, 상기 단위 셀의 모든 공간에 대해 좌우 상하가 서로 대칭인 일정한 패턴을 갖도록 구불구불하게 형성되고, 상기 루프가 전체적으로 폐 루프가 되도록 형성되는 것을 특징으로 한다. 에프에스에스(FSS)(Frequency selective surface), 단일 주파수 대역 에프에스에스(FSS) 공간 필터, 단층구조, 적층구조
Abstract:
A high impedance surface structure using an artificial magnetic conductor, and an antenna and an electromagnetic device using the same surface structure are provided to reduce a size of a unit cell by overlapping conductors in the unit cell with one another. A high impedance surface structure using an artificial magnetic conductor includes a ground layer(300), a first dielectric layer(200), and a high impedance surface layer(100). The ground layer is composed of a first conductive layer. The first dielectric layer is formed on the ground layer. A second dielectric layer and a second conductive layer are formed on the first dielectric layer. The high impedance surface layer is formed in an inter-digital shape to interpose the second dielectric layers. An AMC(Artificial Magnetic Conductor) property is obtained without using a via to connect between the ground layer and the second conductive layer.