http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이덕형,최준수,이동국,안정길,송복섭 한국항공우주학회 2013 한국항공우주학회 학술발표회 논문집 Vol.2013 No.4
본 논문에서는 스마트무인기의 데이터링크 시스템의 구성품인 주 통신링크 통신장비의 설계, 제작 및 평가에 대하여 기술하였다. 스마트무인기를 구성하는 데이터링크 시스템의 사양은 관제장비와 무인항공 기간의 최대 통신 거리뿐만 아니라, 배치 및 정비 보수의 용이성을 위해서 특이성이 요구된다. 본 논문에서는 이와 같이 결정된 특이성을 고려하여 Ku-대역을 사용하는 주 통신링크 통신장비를 설계 구현하였다. 이때 무인기용 무선통신장비는 가시선 200km이상의 통신거리를 만족하기 위한 링크설계와 임무 장비에서 획득한 영상을 압축하여 전송하기 위한 10Mbps이상의 하향링크 그리고 재밍에 강인한 모뎀설계를 통해 요구된 성능을 보장할 수 있도록 하였다. 또한 비행시험과 지상시험을 통해 그 성능을 검증하였다. In this paper the design, manufacture and evaluation of the primary data-link system for the SUAV(Smart Unmanned Aerial Vehicle) is described. The specification of SUAV data-link system requires the maximum communication range between the ground tracking system and an air vehicle as well as special features such as the ease of deployment and maintenance. In consideration of these requirements the primary data-link is designed to operate at Ku-band. The data-link satisfying the communication range of more than 200 km in the line of sight condition, down-link transmitting the compressed imagery data of 10Mbps or higher obtained by a payload, and an anti-jamming modem are designed to fulfill the required capabilities. And the performance of the data-link system is verified through flight and tracking tests.
공동주택의 입면 변화에 따른 일사량 분석 -Skyline 변화를 중심으로-
이덕형,최창호,Lee, Duck-Hyung,Choi, Chang-Ho 한국태양에너지학회 2007 한국태양에너지학회 논문집 Vol.27 No.2
Recently, the point of view about housing environment in the city has changed from the traditional point of view of the center of housing to the subject of land- utilization-control for interaction of buildings. Right of light is the center of this issue in other words. Also many interests about the beauties of the city have increasing centering around Europe etc. This is to change a city design into the characteristic design from the exiting uniform design. As if reflect this situation, recently we are setting up the night illumination and constructing a building which acted as Land Mark like the Jong-Ro Tower. And Apartment Housing was being built various form deviate from a existing standardized form and skyline. Existing studies about sunshine of Apartment Housing have dealt with just about a standardized Apartment Housing form. So this study analyzed a recently increasing interest for Right of light and change of sunshine environment on Apartment Housing which have a various skyline form.
Ku-Band Singly Balanced Schottky 다이오드를 이용한 Balanced Mixer에 관한 연구
具然健,李德炯 弘益大學校 科學技術硏究所 1994 科學技術硏究論文集 Vol.4 No.-
In this paper, a Ku-band quadrature balanced mixer is designed and implemented using Schottky diodes. For broad band operation, a multi-section branch line coupler is used and a stepped-impedance lowpass filter is implemented for the purpose of simplifying the mixer circuit. With -30 dBm RF power, 10.95-11.70 GHz RF frequencies, 6 dBm LO power, and 10 GHz fixed LO frequency, the result of the experiment shows a conversion loss of 3.80-8.00 dB. It is shown that the Schottky diode parameters(especially, the junction capacitance) have a significant effect on the conversion loss and the intermediate frequency giving the minimum conversion loss.