Patent
Surface acoustic wave filter
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TLDR
In this article, a SAW filter Fil1 which has a central frequency of a pass-band is f1 is connected to a sAW resonator Reso1 which had a frequency f1 as a resonance frequency.Abstract:
PROBLEM TO BE SOLVED: To attain a SAW filter which is small-sized, low in cost and loss and has one input and two outputs or two inputs one outputs. SOLUTION: A SAW filter Fil1 which has a central frequency of a pass-band is f1 is connected to a SAW resonator Reso1 which has a frequency f1 as a resonance frequency. A SAW filter Fil2 which makes a frequency f2 a resonance frequency is connected to by a SAW resonator Reso2 which makes the frequency f2 a resonance frequency. Part of the SAW resonator Reso1 and the Reso2 are commonly connected and connected to an impedance matching circuit 10. The SAW filters Fil1 and Fil2, the SAW resonators Reso1 and Reso2 and a capacitor of the impedance matching circuit 10 are formed on a single SAW chip.read more
Citations
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References
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PatentDOI
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