• Journal of Satellite, Information and Communications
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• v.10 no.1
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• pp.88-91
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• 2015

Wireless power transmission (WPT) is a technology using free space as a conductor for transmitting electric power, which aims to transfer not just the transmission signal but also the electrical energy itself. This paper takes issue with the microwave wireless transmission technology utilizing in long-distance transmission. To construct the WPT system, several components are needed, such as RF Oscillator which converts AC power to RF through DC status, high gain antenna and RF rectifier that converts RF back to DC. The array topology is good a candidate for wide use. The objective of this research is to study the efect of the WPT systmem on electric power system.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.4
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• pp.49-53
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• 2018

Parabolic offset antenna is widely used for wireless communication system. The general structure of parabolic offset antenna system is composed of supporting stand and RF devices under parabolic reflector. However sidelobe distortion in gain pattern is occurred by supporting stand and RF devices. Depending on position of subsidiary devices, angle of sidelobe distortion can be changed. In this paper we describe method for sidelobe distortion suppression using raytracing. We calculate 3D vector for sidelobe distortion suppression zone by raytracing method and compare when subsidiary device is in sidelobe distortion suppression zone or not. By comparison, we show method for parabolic antenna sidelobe distortion suppression.

• Proceedings of the KIEE Conference
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• 2003.07d
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• pp.2669-2671
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• 2003

본 논문에서는 변위 손상 현상을 이용하는 중성자 탐지소자와 선량계 모듈에 RF 통신 기능을 추가하여 방사선 환경 내에서 내 방사선화 된 로봇에 의해 가동 중인 원자력 밭전소등의 특정 부분에 대하여 실시간에 측정된 방사선량 데이터의 취득이 가능한 모듈을 개발하였다. 기존의 운용중인 발전소에 대한 방사선량은 휴지기간에 탐지소자를 설치하여 다음 휴지기간에 그 탐지소자를 가지고 나와 누적방사선량을 측정하거나, 설치된 탐지소자에서 유선으로 안전한 곳까지 데이터를 취득해 와서 그 값을 분석하여 왔으나, RF 통신 기능이 추가된 모듈은 내 방사선화 된 로봇에 탑재하여 로봇이 가동 중인 발전소 곳곳을 누비며, 설치된 탐지소자로부터 그 방사선량을 취득한 수 있다. 이는 기존의 취득방식에 비해 많은 부분 효율적인 측면이 있으며, 유지보수 비용의 절감을 가져 올 수 있을 것으로 기대된다. 본 연구에서는 RF 통신을 하기 위한 안테나 회로의 설계 기법과 취득한 정보를 EEPROM에 저장하고, 그 저장 데이터를 로봇에 부착된 Reader에 의해 읽을 수 있는 일련의 흐름을 구성하는데 있어 필요한 여러 가지 기술 혹은 기법에 대하여 살펴보았다.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2006.07a
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• pp.377-377
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• 2006

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.07a
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• pp.333-333
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• 2004

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.07a
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• pp.313-313
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• 2004

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.07a
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• pp.308-308
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• 2004

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.11a
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• pp.427-427
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• 2004

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.11a
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• pp.404-404
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• 2004

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.12 no.3
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• pp.282-289
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• 2019

Reflective and solar LED road studs are being used as a way of securing visibility for road environments. Road markers have various advantages and disadvantages in terms of versatility, efficiency, simplicity and visibility as individual products of reflective type and solar LED. However, in addition to the above, it is possible to prevent secondary accident after accident, It has a common drawback that it is difficult to have. In this paper, we propose a road stud system incorporating a wireless control function using RF - based communication with existing solar LED road studs and a system for controlling them. The proposed system is called the smart road stud system and it can control the equipment through the central control unit and the relay unit connected to the central control room by incorporating the RF communication function in the existing solar LED road stud. In addition, since it is possible to control the lighting method, color, etc. according to the road condition, it is possible to provide the driver with the state of the road to perform the function for preventing the second accident after the accident. It also adds features that minimize the ongoing power consumption of LED and RF communications. In order to verify the validity of the proposed system, prototypes were produced and it was confirmed that it is possible to act as a university for prevention of accident after accident by linking with other traffic system besides accident prevention function by securing existing visibility.