정보통신설비학회논문지 [Journal of the Institute of Information and Telecommunication Facility Engineering]

간행물 정보
  • 자료유형
  • 발행기관
    한국정보통신설비학회 [Korea Institute of Information & Telecommunication Facilities Engineering]
  • ISSN
  • 간기
  • 수록기간
  • 주제분류
    공학 > 전자/정보통신공학
  • 십진분류
    KDC 567.9 DDC 621.38
제14권 제4호 (5건)

가공 배전선에 의한 전자유도 발생 전류에서 지선 단말의 적분 평균 거리 적용 효과

이상무, 이강인, 최문환, 조평동

한국정보통신설비학회 정보통신설비학회논문지 제14권 제4호 2016.12 pp.1-7

※ 기관로그인 시 무료 이용이 가능합니다.

When an induced voltage by an aerial power distribution line is calculated, there would happen a very large error according to the position of induced section because the current calculation method described in the national specification does not reflect the effect of leakage current through the each pole ground and uses just a predetermined value for a shielding effect of neutral line. The methodology of this paper is based on the splitted formulae for a calculation of neutral line shielding effect with the accumulated earth return current of leakages on each pole. And it has introduced the integration concept to equalize various terminal line distance as an one same distance utilizing a factorized composition form of leakage current rate against total unbalance current flowing in a neutral line at the start point of induced section. This method enhanced an efficiency of calculation which results into an increase of accurate rate as 93 % than the one of existing method, compared to real measured values.



834-879MHz UHF 통신시스템 3차 고조파 제거를 위한 Feedforward 기반 액티브 대역통과 필터

민창기, 정원재, 장종은, 채형일, 박준석

한국정보통신설비학회 정보통신설비학회논문지 제14권 제4호 2016.12 pp.8-14

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This paper descries an active bandpass filter using feedforward structure for improve the channel selectivity of wireless communication system. This avtive bandpass filter is composed of two paths: one path feedforward, the other is feedthrough path. The feedthrough path is composed of a delay control circuit, the feedforward path is composed of a notch filter and PGA. The outputs signal of these two path are added to reject unwanted signals. To perfect reject unwanted signal, the two path should be syncronized each other. Therefore, delay circuit and PGA synchronize phase delay and amplitude of two path signals. The delay controlled 0.2 to 22.5nsec with 0.1nsec step. The PGA gain range is 0 to 15dB with 1dB step. The cut-off frequency response of active bandpass filter is about 40dB/Hz. Moreover, ACLR is about 60dB.



가상 사설망에서의 3계층 IPSec VPN의 암호화 성능평가에 관한 연구

김지환, 양재수, 박용범

한국정보통신설비학회 정보통신설비학회논문지 제14권 제4호 2016.12 pp.15-21

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VPN (Virtual Private Network) is utilized for general outside users to communicate securely with inner users and the servers located inside by an encryption for safe communication. VPN has various techniques and functions on the layer 2 and 3, thus this study examined whether layer of VPN performed encryption of the data more securely and is more effective in the 2 layers of VPN techniques. Based on the results of the test, the layer 3 VPN technique was confirmed to communicate with inner space with faster speed than that of the layer 2. And in comparison with encryption protocol supporting in the layer 2 and 3, IPSec VPN of the layer 3 VPN technique was more superior in the function of encryption.



RF 무선전력 수집 기술 기반 IoT 센서노드 자기유지 및 동적 전력관리 기술

이대건, 정원재, 장종은, 채형일, 박준석

한국정보통신설비학회 정보통신설비학회논문지 제14권 제4호 2016.12 pp.22-30

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This paper describes self-sustainable IoT sensor node using 263 MHz wireless power harvesting and dynamic power management techniques. Wireless power harvesting system charges the sensor node battery using the master node’s output signal. The output voltage of the RF-DC converter, based on the injection-locked oscillator, is higher than the input peak voltage. Therefore, the sensor node’s power harvesting range is improved to –10dBm, which is the power input (when the sensor node is located) at 13meter from the master node (263MHz, 26dBm output). when the input ID matched with the slave node, the power switch is turned on to the main operation devices (sensor, MCU, transmission), otherwise, the power switch is turned to battery charging.



RFID 시뮬레이터를 활용한 Passive RFID 태그 인식률 개선 방안


한국정보통신설비학회 정보통신설비학회논문지 제14권 제4호 2016.12 pp.31-39

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This paper introduces methods for avoiding the null effect in UHF RFID Systems using a mathematical modelling tool. It considers the ground & ceiling reflection effects to making the null effect simulation tool. To verify the properness of the mathematical modeling, we test it in real UHF RFID System. And we also suggest some effective methods for reducing the null effect to improve the RFID Tag identification ability.


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