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| Precise and full extraction of the coupling-of-mode parameters with periodic Green's function | |
| 引用本文： | 林基明,吴浩东,王宁,仇洪冰,水永安. Precise and full extraction of the coupling-of-mode parameters with periodic Green's function[J]. 中国科学F辑(英文版), 2003, 46(4): 298-308. DOI: 10.1360/01yf0281 |
| 作者姓名： | 林基明 吴浩东 王宁 仇洪冰 水永安 |
| 作者单位： | State Key Laboratory of Modern Acoustics,Institute of Acoustics,Nanjing University,Nanjing 210093,China,Department of Communication and Information Engineering,Guilin Institute of Electronic Technology,Guilin 541004,China Correspondence should be addressed to Lin Jiming,State Key Laboratory of Modern Acoustics,Institute of Acoustics,Nanjing University,Nanjing 210093,China,State Key Laboratory of Modern Acoustics,Institute of Acoustics,Nanjing University,Nanjing 210093,China,Department of Communication and Information Engineering,Guilin Institute of Electronic Technology,Guilin 541004,China Correspondence should be addressed to Lin Jiming,State Key Laboratory of Modern Acoustics,Institute of Acoustics,Nanjing University,Nanjing 210093,China |
| 摘 要： | Due to the more and more stringent requirements on surface acoustic wave (SAW) filters performances, recently considerable attention has been focused on the investigation of low-loss SAW filters in the last decade. Most low-loss filters, such as single phase unidirectional transducers (SPUDT), employ the electrodes multi-reflection effects to realize low insertion loss. In the design of low-loss filters, the phenomenological coupling-of-mode (COM) model[1] method is frequently used. Its … |
| 关 键 词： | surface acoustic wave (SAW) Green抯 function harmonic admittance coupling-of-mode model (COM). |
| 收稿时间： | 2008-10-31 |
Precise and full extraction of the coupling-of-mode parameters with periodic Green’s function |
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| Lin?Jiming? | |
| Authors: | Lin?Jiming? author-information" > author-information__contact u-icon-before" > mailto:linjm@gliet.edu.cn" title=" linjm@gliet.edu.cn" itemprop=" email" data-track=" click" data-track-action=" Email author" data-track-label=" " >Email author,Wu?Haodong,Wang?Ning,Qiu?Hongbing,Shui?Yong’an |
| Affiliation: | 1. State Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, China;Department of Communication and Information Engineering, Guilin Institute of Electronic Technology, Guilin 541004, China 2. State Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, China 3. Department of Communication and Information Engineering, Guilin Institute of Electronic Technology, Guilin 541004, China |
| Abstract: | 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. |
| Keywords: | surface acoustic wave (SAW) Green's function harmonic admittance coupling-of-mode model (COM) |
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