radar stations on the ground, it began broadcasting a signal back that identified the aircraft as friendly. RFID works on this same basic concept. A signal is sent to a transponder, which wakes up and either reflects back a signal (passive system) or broadcasts a signal (active system).
3. Mario W. Cardullo received the first U.S. patent for an active RFID tag with rewritable memory on January
1. RADAR의 정의
① 전파의 발사로 물체에서 반사되는 반사파를 이용하여 목표물의 존재와 그 거리를 탐지하 는 무선감시장치
② 송신기에서 매우 짧은 시간에 발생시킨 마이크로파 또는 밀리미터파를 날카로운 지향성을 가진 안테나로 목표물에 발사하고, 그 반사파를 수신하여 브라운관에 도형을
II. Situational Analyses
1. About computer market.
In world computer market, the first leader is HP this couple of years. And the second rank is Dell, and the third leader is Acer which is Taiwanese company. Lenovo is a fourth leader in world PC market. But Lenovo is the first leader in Chinese PC market. But Lenovo even isn’t the fifth leader in US pc market. In US PC market, the fourth l
▪ To penetrate into DRAM market
▪ Aggressive Investment and enduring negative profit margin
▪ 64K DRAM , 256K DRAM, 4Mbit DRAM
▪ Investing in technology development for manufacturing efficiency
▪ Technological development increasing wafer size
→ more chip cutting available at the same time
방위각도,활공각도 및 위치정보를 제공하는 시설 : ILS)
⑥ RADAR시설 (항행중인 항공기에 위치정보를 제공하는 시설: ASR, ARSR, PAR 및 SSR)
⑦ 전술항법무선표지시설(항행중인 항공기에 위치정보를 제공하는 시설 : TACAN)
Ⅱ RADAR 시설
1. RADAR 시설
RADAR는 RAdio Detection And Ranging의 약자로서 2차 세계대전