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We show ladder type SAW resonator filters using high-coupling SiO2/5°Y-X LiNbO3 with zero temperature coefficients of frequency (TCF). The experimental results showed lower than below 1.6 dB insertion loss with a wide band and zero TCF in the 2 GHz range. Also, we show the narrower band width of ladder-type filters using a new configuration of IDTs and reflectors on high-coupling substrates.
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Yamanouchi et al. (2005) studied this question.
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