지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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An in-line dispersive delay line (DDL) demands low and controllable reflectivity of the reflectors, especially if the surface acoustic wave (SAW) propagates all the way along the reflecting structure. The metal reflectors are usually too strong and introduce too much attenuation in such a device. The proposed solution of this problem is to spatially separate the acoustic channels for different frequencies with the help of Fan-shaped Transducers (FIDT) and to use narrow open metal reflectors to reduce reflectivity. Special arrangement of FIDT is performed to use 180-deg. reflection of the SAW. Narrow open metal strips with a metallisation ratio of the order of 20% are used as reflectors with small and controllable reflectivity. Reflectivity of such strips is estimated both theoretically and experimentally. Experimental performance of the proposed DDL is presented.
목차
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참고문헌 (3)
참고문헌 신청
D. Chen / 1985 / Analysis of metal-strip SAW gratings and transducers / IEEE Trans. Sonics Ultrason. SU-32 : 395 ~ 408
R. C. Woods / 1982 / Dispersive delay lines using 180Δ reflecting metal dot arrays / Proc. IEEE Ultrason. Symp. 88 (91) : 88 ~ 91
R.E. Chapman / 1978 / In-line reflective array devices / Proc. IEEE Ultrason. Symp. : 728 ~ 733
R. C. Woods / 1982 / Dispersive delay lines using 180Δ reflecting metal dot arrays / Proc. IEEE Ultrason. Symp. 88 (91) : 88 ~ 91
R.E. Chapman / 1978 / In-line reflective array devices / Proc. IEEE Ultrason. Symp. : 728 ~ 733
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