諧振器品質(zhì)因數(shù)的精確測試

同軸諧振器品質(zhì)因數(shù)的精確測試

－臨界點法品質(zhì)因數(shù)定義傳輸式品質(zhì)因數(shù)測試－電路模型傳輸式品質(zhì)因數(shù)測試－阻抗關(guān)系對于高Q諧振器，應(yīng)用窄帶近似得：傳輸式品質(zhì)因數(shù)測試－QL和Q0的關(guān)系傳輸式品質(zhì)因數(shù)測試－S21傳輸式品質(zhì)因數(shù)測試－Q0傳輸式品質(zhì)因數(shù)測試－Q0測試誤差及措施寄生參數(shù)措施噪聲曲線擬合耦合結(jié)構(gòu)的損耗和電抗融入電路模型傳輸線和接頭損耗融入電路模型輸入輸出的交叉干擾曲線擬合中的圓圖失真/融入電路模型傳輸線時延校準/相位修正反射式品質(zhì)因數(shù)測試－等效電路反射式品質(zhì)因數(shù)測試－臨界點定義反射式品質(zhì)因數(shù)測試－Q圓反射式品質(zhì)因數(shù)測試－Q0計算臨界點法仿真結(jié)果示意圖隨著探針的長度的增加，S11的圓圖軌跡半徑逐漸增大臨界點法實測結(jié)果示意圖當外部耦合非常弱的情況下，S11導(dǎo)納圓已經(jīng)分辨不出臨界點法仿真提取比較（1）腔體尺寸35×35×50，諧振桿φ11×φ8×49，螺釘φ4×6.5，DIN頭，Tap高度25。

Q0

=3959.58@936.36MHzLen(mm)F1(MHz)F2(MHz)F0(MHz)Q0ΔQ0%0.5933.881933.643933.763923.120.921933.344933.106933.2253920.840.982934.521934.282934.43909.381.274934.725934.485934.613893.931.668931.84931.59931.7153726.825.88臨界點法仿真提取比較（2）腔體尺寸35×35×35，諧振桿φ10×φ8×29，螺釘φ4×1，DIN頭，Tap高度17.5。Q0=5467.28@2010.8MHzLen(mm)F1(MHz)F2(MHz)F0(MHz)Q0ΔQ0%0.52002.1782001.812001.995440.130.512002.3372001.9682002.155425.810.7622001.6062001.2362001.425409.171.0641997.4181997.0441997.235340.122.3381960.0331959.6511959.845130.46.16臨界點法仿真提取比較（3）臨界點法與帶連接器和探針的同軸腔本征模的比較Len(mm)臨界點法本征模ΔQ0%F0(MHz)Q0F0(MHz)Q00.5933.763923.12935.65939290.151933.2253920.84935.77539320.282934.43909.38935.9239280.474934.613893.93935.30938960.058931.7153726.82935.10938021.98臨界點法仿真提取比較（4）臨界點法與同軸諧振器外載Q值的比較Len(mm)臨界點法外載Q值ΔQ0%F0(MHz)Q0F0(MHz)QL0.5933.763923.12934.71715981933.2253920.84934.71115042934.43909.38934.44412994934.613893.93934.0329028931.7153726.82930.53322實測諧振頻率對Q0的影響F1(MHz)F2(MHz)F0(MHz)Q0F0模擬(MHz)Q0模擬Q0/

Q0模擬%1825.8861826.31826.094407.6818805304831800.3121800.731800.524304.1918105196821701.4211701.8791701.653711.517345054