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Low-loss SAW IF filters with new unidirectional IDTs used in digital mobile radios

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2 Author(s)
Hikita, M. ; Central Res. Lab., Hitachi Ltd., Tokyo, Japan ; Okazaki, K.

A new type of unidirectional IDT having both excitation and reflection electrodes within each section of one wavelength ( lambda 0) was developed. High-performance SAW IF filters used in digital mobile radios with low insertion losses of 3-6 dB at 70 MHz and 3.8 dB at 250 MHz centre frequencies were realised using ST-cut quartz substrates.

Published in:

Electronics Letters  (Volume:29 ,  Issue: 16 )