中国科学F辑(英文版)
中國科學F輯(英文版)
중국과학F집(영문판)
SCIENCE IN CHINA(Series F)
2003年
4期
298-308
,共11页
林基明%吴浩东%王宁%仇洪冰%水永安
林基明%吳浩東%王寧%仇洪冰%水永安
림기명%오호동%왕저%구홍빙%수영안
surface acoustic wave (SAW)%Green's function%harmonic admittance%coupling-of-mode model (COM)
Precise extraction of coupling-of-mode (COM) parameters plays a key role in the design for modern high performance surface acoustic wave (SAW) filters. An accurate and efficient analysis of characteristics for SAW propagating under periodic metal gratings has been developed based on the concept of harmonic admittance and periodic Green's function. Some further improvement is made on the numerical algorithm, such as isolation of the logarithmic singularity, asymptotic simplification of periodic Green's function, and utilization of Chebyshev polynomials as basis functions of the charge distribution. The most important point is extraction of the phase of coupling reflection coefficient by the characteris- tics of standing wave on the edges of stopband. This approach leads to a fast, precise and full extraction of COM parameters. The results and discussions for several materials have been presented.
