| 摘要 |
Surface acoustic wave (SAW) zebra-wave-guide ( 10 ) implemented as an array of interdigitized electrode fingers, wherein the array has internal inter-finger connectors ( 18 ) providing inside electrical shorting of part of fingers ( 16 ) remaining other fingers ( 14 ) to be isolated, moreover, the array ( 12 ) is bordered by important free surface spaces ( 15 ). Time delay and phase of the propagating SAW beam front are controlled by the varying of quantity of isolated fingers ( 14 ) of the zebra-wave-guide ( 10 ). Aggregation ( 40 ) of the parallel zebra-wave-guides having different quantities of isolated fingers ( 14 ) and different widths allows manipulations with narrow SAW beams' phases and magnitudes, that becomes helpful degree of freedom for desire transformation of the SAW beam ( 140 ). Aggregation ( 890 ) of bi-directional inter-digital transducer (IDT), U-type 3 dB MSC ( 85 ), pair of zebra-wave-guides ( 10 and 11 ) with different quantity of isolated fingers and IDT-wave-guide ( 847 ) represents a partially-unidirectional-combined-IDT ( 890 ), that may be utilized for a miniaturized low loss SAW filter design ( 800 ).
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