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유한차분시간영역 알고리듬을 이용한 마이크로스트립 패치 배열 안테나 특성해석
홍용인 한국정보통신학회 1998 한국정보통신학회논문지 Vol.2 No.2
본 연구는 유한 차분법 시간 영역 알고리듬을 이용하여 배열 안테나의 전자계 특성들을 해석한다. 원통좌표 계에서 맥스웰 방정식의 유한차분 방정식을 정의하였으며, 자유공간과 같은 무한영역해석을 위해서 Mur의 흡수경계조건을 이용하였다. 배열 안테나를 단위격자 구조로 모델링한 후 시간영역에서 필드분포를 도시하였다. The purpose of this paper is to analyze the electromagnetic field characteristics of array antenna with the finite difference-time domain algorithm. Finite difference equations of Maxwell's equations are defined in cylindrical coordinate systems. To simulate the unbounded problem like a free space, the Mur's absorbing boundary condition is also used. After modeling the array antenna with the grid structure, the transient response of the field distribution is depicted in the time domain.
유한차분 시간영역 알고리듬을 이용한 누설 동축 케이블의 전자파 특성에 관한 연구
홍용인,김정기 한국통신학회 1996 韓國通信學會論文誌 Vol.21 No.11
In this paper, the electromagnetic field characteristics of leaky caxial cable are anlyzed by using the finite difference-time domain(FDTD) technique. Finite difference equations of Maxwell's equations are definedin cylindrical coordinate systems. To simulate the open boundary problem like a free space, the Mur's Absorbing Boundary condition(Mur-ABC) is also used. After modeling the leaky coaxial cable with the three dimensional grid structure, the transient response of the field distribution and the current distribution, the field pattern, the coupling effect are depicted in the time domain.
FDTD법을 이용한 마이크로스트립 안테나의 전자파 특성에 관한 연구
홍용인,정명덕,홍성일,이흥기 한국정보통신학회 1998 한국정보통신학회논문지 Vol.2 No.4
본 연구는 시간영역 유한 차분법(finite difference-time domain method:FDTD)을 이용하여 마이크로스트립 배열 안테나의 전자계 특성들을 해석한다. 직각좌표계에서 맥스웰 방정식의 유한차분 방정식을 정의하였으며, 자유공간과 같은 무한영역해석을 위해서 Mur의 흡수경계조건을 이용하였다 마이크로스트립 배열 안테나를 단위격자 구조로 모델링한 후 시간영역에서 필드분포를 도시하였다. The purpose of this paper is to analyze the electromagnetic field characteristics of microstrip array antenna with the FDTD(finite difference-time domain method). Finite difference equations of Maxwell's equations are defined in rectangular coordinate systems. To simulate the unbounded problem like a free space, the Mur's absorbing boundary condition is also used. After modeling the microstrip array antenna with the grid structure, the transient response of the field distribution is depicted in the time domain.
FDTD 알고리즘을 이용한 누설 동축 케이브르이 전파 특성 해석
홍용인,손동인,김태원,김정기,남호석 대한전자공학회 1996 전자공학회논문지-A Vol.33 No.5
The purpose of this paper is to analyze the field distribution and the current distribution of leaky coaxial cable with the finite difference-tiem domain(FDTD) algorithm. finite difference equations of maxwell's equations are defined in cylindrical coordinate systems. To simulate the unbounded problem like a free space, the Mur's absorbing boundary conditon is also used. After modeling the leaky coaxial cable with the three dimensional grid structure, the transient resoponse of th efield distribution and the current distribution are depicted in the time domain.
주기적인 대칭 슬롯을 가진 누설동축 케이블의 전파모드 해석
홍용인,맹명재,김정기 대한전자공학회 1994 전자공학회논문지-A Vol.31 No.9
In indoor radio systems, vehicular communication systems, and land mobile systems, a very important problem is that of maintaining stable communications at all locations. Therefore solutions for the indoor propagation problem are important aspects of the mobile communication system. leaky coxial cables are finding increasing use in communications systesm involving mines, tunnels, tailroads, and highways, and in new obstacle detection, or guided radar, schemes for ground transportation and perimenter surveilance. In this paper a leaky coaxial cable having periodic slots in the outer conductor is described to obtain the propagation modes in the various environments. We use aneccentric cylindrical model to develop the theory for surface-wave propagation on the cable. Numerical Results are also included for the propagation constants, field distribution and current distribution. First, we derive the electromagnetic equation for leaky coaxial cable having symmetrical periodic slots using mode-matching method and Floquet's theorem, and then find various modes, propagation constants, field distribution, etc.
캐롤 길리건(Carol Gilligan)의 돌봄(Caring)의 개념으로 본 목회자 아내의 정체성에 관한 연구
홍용인 한국기독교상담심리학회 2010 한국기독교상담학회지 Vol.20 No.-
This is psychological theory study about understanding Pastors wives’identity based on the concept of Carol Gilligan’s caring. Pastors wives’identity is defined as synthetic concept stated with self,the one by relationship and it’s role knowledge. Personal factors like gender, intellectual capacity, and character are described as personal identity element related with pastors wives’identity variables such as stability,uniqueness, self-acceptance, and goal-directness. Relational factors like family, church, sociocultural and God are divided as relational identity element affecting pastors wives’self-assertiveness and interpersonal role expectation. Carol Gilligan explained female identity as relationship using the idea of caring, women’s character. Female identity development from girl to female is defined as ‘right and responsibility’to ‘self-expression,’‘girl’s psychological risk conflict’to ‘inner voice and silence,’and adult ‘caring’rule to ‘maturity’concept. Female identity development stages are divided as self-centered, selfishness to responsibility, responsibility to self sacrifice,good deeds to reality, and oneself to others stage. Pastors wives’identity is explained as the process of maturity caring oneself and others in Gilligan’s development stages. Therefore in describing pastors wives’maturity, ‘caring’might be discussed with integrated study in God as alternative to deal successfully with the limitation of it’s concept.