谐振器品质因数的精确测试.pptx

,技术培训,单击此处编辑母版标题样式,同轴谐振器品质因数的精确测试临界点法,品质因数定义,传输式品质因数测试电路模型,传输式品质因数测试阻抗关系,对于高,Q,谐振器，应用窄带近似得：,传输式品质因数测试,Q,L,和,Q,0,的关系,传输式品质因数测试,S,21,传输式品质因数测试,Q,0,传输式品质因数测试,Q,0,测试误差及措施,寄 生 参 数,措 施,噪声,曲线拟合,耦合结构的损耗和电抗,融入电路模型,传输线和接头损耗,融入电路模型,输入输出的交叉干扰,曲线拟合中的圆图失真,/,融入电路模型,传输线时延,校准,/,相位修正,反射式品质因数测试等效电路,反射式品质因数测试临界点定义,反射式品质因数测试,Q,圆,反射式品质因数测试,Q,0,计算,临界点法仿真结果示意图,随着探针的长度的增加，,S,11,的圆图轨迹半径逐渐增大,临界点法实测结果示意图,当外部耦合非常弱的,情况下，,S,11,导纳圆,已经分辨不出,临界点法仿真提取比较（,1,）,腔体尺寸,353550,，谐振杆,11,849,，螺钉,46.5,，,DIN,头，,Tap,高度,25,。,Q,0,=,3959.58,936.36MHz,Len,(mm),F,1,(MHz),F,2,(MHz),F,0,(MHz),Q,0,Q,0,%,0.5,933.881,933.643,933.76,3923.12,0.92,1,933.344,933.106,933.225,3920.84,0.98,2,934.521,934.282,934.4,3909.38,1.27,4,934.725,934.485,934.61,3893.93,1.66,8,931.84,931.59,931.715,3726.82,5.88,临界点法仿真提取比较（,2,）,腔体尺寸,353535,，谐振杆,10,829,，螺钉,41,，,DIN,头，,Tap,高度,17.5,。,Q,0,=,5467.28,2010.8MHz,Len,(mm),F,1,(MHz),F,2,(MHz),F,0,(MHz),Q,0,Q,0,%,0.5,2002.178,2001.81,2001.99,5440.13,0.5,1,2002.337,2001.968,2002.15,5425.81,0.76,2,2001.606,2001.236,2001.42,5409.17,1.06,4,1997.418,1997.044,1997.23,5340.12,2.33,8,1960.033,1959.651,1959.84,5130.4,6.16,临界点法仿真提取比较（,3,）,临界点法与带连接器和探针的同轴腔本征模的比较,Len,(mm),临界点法,本征模,Q,0,%,F,0,(MHz),Q,0,F,0,(MHz),Q,0,0.5,933.76,3923.12,935.659,3929,0.15,1,933.225,3920.84,935.775,3932,0.28,2,934.4,3909.38,935.92,3928,0.47,4,934.61,3893.93,935.309,3896,0.05,8,931.715,3726.82,935.109,3802,1.98,临界点法仿真提取比较（,4,）,临界点法与同轴谐振器外载,Q,值的比较,Len,(mm),临界点法,外载,Q,值,Q,0,%,F,0,(MHz),Q,0,F,0,(MHz),Q,L,0.5,933.76,3923.12,934.717,1598,1,933.225,3920.84,934.711,1504,2,934.4,3909.38,934.444,1299,4,934.61,3893.93,934.032,902,8,931.715,3726.82,930.53,322,实测谐振频率对,Q,0,的影响,F,1,(MHz),F,2,(MHz),F,0,(MHz),Q,0,F,0,模拟,(MHz),Q,0,模拟,Q,0,/,Q,0,模拟,%,1825.886,1826.3,1826.09,4407.68,1880,5304,83,1800.312,1800.73,1800.52,4304.19,1810,5196,82,1701.421,1701.879,1701.65,3711.5,1734,5054,73,1601.424,1601.94,1601.68,3099.26,1594,4761,65,1500.155,1500.726,1500.44,2621.99,1478,4492,58,