Transmission-line model: cascade-matrix-transform method for computing the reflection of grating filters

Shu-Hui Tsai; Ching-Yee Chang; Chung-Hsien Lin; Chun-Hsien Lee; Cheng-Kuo Lee; Ruey-Shing Star Huang

doi:10.1117/12.445023

17 October 2001 Transmission-line model: cascade-matrix-transform method for computing the reflection of grating filters

Shu-Hui Tsai, Ching-Yee Chang, Chung-Hsien Lin, Chun-Hsien Lee, Cheng-Kuo Lee, Ruey-Shing Star Huang

Author Affiliations +

Proceedings Volume 4581, Passive Components and Transmission Systems; (2001) https://doi.org/10.1117/12.445023
Event: Asia-Pacific Optical and Wireless Communications Conference and Exhibit, 2001, Beijing, China

Abstract

The reflectors of the surface acoustic wave (SAW) filters affect the filter performance, such as the insertion loss. The Cascade-Matrix-Transform Method provides a solution for the trivial calculation of the reflection of the surface acoustic wave (SAW) filters. It is easy to combine the multiple-reflection effect and propagation attenuation by arranging the cell matrix. The results show the effects of number of reflectors and the optimal ratio of the grating period to wavelength. The appropriate grating period is the half wavelength of the operating frequency with an optimal value of number of reflectors. The whole reflection of grating filters with different reflection coefficients at different frequencies in conjunction with the physical explanation of multiple reflection effects are disclosed in this paper. This methodology can also be extended to other further grated type filters, such as microwave filters or optical filters.

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Shu-Hui Tsai, Ching-Yee Chang, Chung-Hsien Lin, Chun-Hsien Lee, Cheng-Kuo Lee, and Ruey-Shing Star Huang "Transmission-line model: cascade-matrix-transform method for computing the reflection of grating filters", Proc. SPIE 4581, Passive Components and Transmission Systems, (17 October 2001); https://doi.org/10.1117/12.445023

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