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利用微带谐振技术研究了MgB2/A12O3和YBa2Cu3o7-X/LaAlO3(YBCO/LAO)超导薄膜的微波性质.一个颗粒尺寸模型被用来分析超导薄膜的穿透深度和表面电阻.结果表明,对于高质的YBCO/LAO,微波性质主要由颗粒决定.对于低质的MgB2/Al2O3,该薄膜的微波性质主要由颗粒边界决定.“,”Microwave responses of MgB2/A12O3 and YBa2Cu3O7-x/LaAlO3(YBCO/LAO)superconducting thin films were investigated by microstrip resonator technique.A grain-size model is used to analyze micro-wave properties of the films.For high quality YBCO/LAO film,penetration depth and surface resistance were dominated by grains.For low quality MgB2/A12 O3,microwave properties of the thin film were most-ly dominated by grain boundaries.