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SURFACE ACOUSTIC WAVE FILTER FOR SUPPRESSING SURFACE TO SURFACE INTERFERENCE FOR A SATELLITE COMMUNICATION RECEIVER
SURFACE ACOUSTIC WAVE FILTER FOR SUPPRESSING SURFACE TO SURFACE INTERFERENCE FOR A SATELLITE COMMUNICATION RECEIVER
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机译:用于抑制卫星通信接收器的表面到表面干扰的表面声波滤波器
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摘要
A filter for suppressing surface to surface interference for a satellite communication receiver which utilizes a surface acoustic wave (SAW) element. The SAW filter comprises two inter-digital transducers for input and one inter-digital transducer for output, all three transducers are constructed and arranged on a piezoelectric substrate. The widths of the adjacent portions of electrodes and the spaces between the electrodes of the input inter-digital transducers are adjusted based upon the principle of a transversal filter so that the frequency responses of the input interdigital transducers have a predetermined band width and a reduced gain of a frequency range where an interference signal exists respectively.
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