Journal of the Korean Institute of Telematics and Electronics (대한전자공학회논문지)
- Volume 21 Issue 5
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- Pages.27-32
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- 1984
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- 1016-135X(pISSN)
Development of TV-IF SAW Filter II-Compensation Methods of Diffraction Effect
TV용 탄성표면파 필터의 개발 II-회절 영향 보상방법
- Kim, Jin-Ha (Dept. of Electrical Eng. and Electronic Eng., Korea advanced Institute of Science and Technology) ;
- Nam, Jeong-Hyeon (Dept. of Electrical Eng. and Electronic Eng., Korea advanced Institute of Science and Technology) ;
- Park, Song-Bae
- Published : 1984.09.01
Abstract
In SAW filters with a small aperture, diffraction effect is not negligible and degrades the frequency response near the trap. A computer simulation program for diffraction analysis is developed, and an effective diffraction compensation method is proposed to compensate the diffraction effect. A TV-lF SAW filter was designed with the diffraction taken account by the proposed method, which satisfies given frequency specifications.
SAW필터에서 변환기의 구경 (aperture)의 크기를 작게 하면 화질의 영향이 크게 나타나게 되어 트랩(trap)부근에서 주파수 특성이 크게 손상된다. 회절의 영향을 해석할 수 있는 컴퓨터 시뮬레이션 프로그램이 작성되었으며 회절의 영향이 큰 SAW필터에 적용될 수 있는 회절보상방법이 제안되었다. 이를 TV중간주파 필터에 적용하여 실험적으로 유용성을 확인하였다.
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