서지주요정보
회전하는 두개의 쇠막대에 의한 8-12GHz 대 전자파의 되반사 측정과 그 영상 재현 = Measurement of the backscattered electromagnetic field from two poles on a rotation plate and its image reconstruction
서명 / 저자 회전하는 두개의 쇠막대에 의한 8-12GHz 대 전자파의 되반사 측정과 그 영상 재현 = Measurement of the backscattered electromagnetic field from two poles on a rotation plate and its image reconstruction / 김기봉.
저자명 김기봉 ; Kim, Kee-Bong
발행사항 [서울 : 한국과학기술원, 1987].
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소장정보

등록번호

4104433

소장위치/청구기호

학술문화관(문화관) 보존서고

MEE 8712

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

In order to obtain a high resolution microwave images, backscattering microwave fields from two conducting poles on a rotating objects is measured. The measured backscattered data is taken as steps of 1.8 degree intervals for 360˚ rotation and of 11 different frequencies having 400MHz intervals from 8GHz to 12GHz. A computation algorithm to reconstruct two pole images from these 200×11 measured data is programmed. The program is tested for one pole or two poles on a rotating objects and for rotating angles of 360˚, 180˚, 90˚, 60˚, 30˚ and 10˚ and for different frequency intervals between 8 to 12GHz. The calculated results show that the point spread function for one pole object shows that the first side lobe level is -13.3 dB for 3 different frequencies for 360˚ measurement. The more frequency data yield the reduction of side lobe levels but the less angular data widens the image point. The typical measured data are taken in an anechonic chamber for 200 angluar points and for 11 different frequencies in the 8 to 12GHz range by two open ended rectangular waveguide horns, one for the transmitting and the another for the receiving antenna. The co-polarization coupling between these two antennas is less than -50 dB over the whole X-band frequency range. The reconstructed image for one pole shows that the first side lobe level is -10.2 dB below the main object level(-14.6 dB for simulation). The reconstructed image for the two pole objects having the diameter of 1cm and departed by 10cm from the measured data is shown and it assumes that this reconstructing algorithm from the measured angular spectrum provides quite accurate images.

서지기타정보

서지기타정보
청구기호 {MEE 8712
형태사항 [iii], 68 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Kee-Bong Kim
지도교수의 한글표기 : 나정웅
지도교수의 영문표기 : Jung-Woong Ra
학위논문 학위논문(석사) - 한국과학기술원 : 전기 및 전자공학과,
서지주기 참고문헌 : p. 66-68
주제 Image reconstruction.
Microwave imaging.
Inverse scattering transform.
High resolution spectroscopy.
전자파 산란. --과학기술용어시소러스
화상 재생. --과학기술용어시소러스
고분해능 분광법. --과학기술용어시소러스
역산란법. --과학기술용어시소러스
Electromagnetic waves --Scattering.
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