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Low Loss Surface-Acoustic-Wave Filters

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2 Author(s)
Potter, B.R. ; Texas Instruments Incorporated,Dallas, TX ; Hartmann, C.S.

For several years surface-acoustic-wave (SAW) devices have looked promising as future components for receiver front-end and intermediate frequency filters. However, high insertion loss and a time domain triple transit signal have limited the utilization of these devices. The low loss SAW filter overcomes both previous problems and is a milestone in electronic component development. Filters with loss as low as -0.6 dB at 35 MHz, -2.3 dB at 320 MHz, and -50 dB sidelobes are routinely constructed. This paper discusses surface-wave filters in general, and then specifically the design of low loss SAW filters.

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Parts, Hybrids, and Packaging, IEEE Transactions on  (Volume:13 ,  Issue: 4 )