In this article some results about the study of a SAW power series fm-dl (pfm-dl) with time-bandwidth product of 160 and fractionalbandwidth of 32% are presented.
本文报道了对时带宽积为160,相对带宽为3%的幂级数调频SAW色散线的研究结果。
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Two kinds of SAWF using respectively usual and SPUDT tapered transducers with 15% fractionalbandwidth are designed on Y128. One transducer is block weighted, and the other one withdrawal - weighted.
The hexagon fractional slot structure is chosen, the gradually changed CPW feed is adopted. Not only the bandwidth of matched impedance is expanded, but also the antenna's miniaturization is realized.