| 摘 要： | Surface leaky wave(SLW)resonator is designed and fabricated by using high electromechanicalcoupling and large impedance changes under the shorted metallized strips of the surface leaky wave,excited on the surface of the 49°rotated Y-cut LiNbO_3.The prominent advantage over the con-ventional surface acoustic wave resonator(SAWR)is that the required area of the piezo-electric sub-strate could be reduced to 1/4—1/5 of SAWR at the same frequency and its insertion loss is only2—5 dB in 50Ω system. The electromechanical coupling constant k_s~2 and acoustic impedance mismatching ratio|ε| aremeasured and thus the reflective frequency responses of the shorted metaliized array are calculated.The factors relating with the insertion loss are analyzed by utilizing an equivalent circuit model.Some typical experimental results are shown in this paper as well.
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