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,,,,,QBSF多电感型滤波器,,,,,,,,
,,,,,,,,,,,,,,
,滤波器要求(给定条件）计算：,,,,,,,,,,,,
（一）、,给定通带波纹RdB=,,0.18,(dB)，,可求出ρ,20.15,%，再求出反射损耗Aρ为,,,13.91,(dB),,
,或者直接给出反射损耗Aρ,,,13.98,（dB），可求出反射系数ρ=,,,20.00,%。,,,,
,注意：二者只给出一个参数！就可以得出有用的参数ρ及Aρ，目的是求出反射系数和反射损耗值供查图2-86估算电路阶数用。,,,,,,,,,,,,
,将上述求出的有用参数填入下框中：,,,,,,,,,,,,
,手工输入,(a),反射系数,20.00,(%),手工输入,(c),阻抗,75,(Ω),,,
,,(b),反射损耗,13.90,(dB),,(d),最小衰减,70,(dB),,,
,,,,,,,,,,,,,,
（二）、,,低通滤波器带宽条件：,,,高通滤波器带宽条件：,,,带通滤波器带宽条件：,,,带阻滤波器带宽条件：,,
,手工输入,截止频率,87,（MHz）,截止频率,950,（MHz）,低截止频率,87,（MHz）,低截止频率,68,（MHz）
,,衰减频率,300,（MHz）,衰减频率,862,（MHz）,高截止频率,240,（MHz）,高截止频率,260,（MHz）
,,,,,,,,低衰减频率,68,（MHz）,低衰减频率,87,（MHz）
,,,,,,,,高衰减频率,260,（MHz）,高衰减频率,240,（MHz）
,,,,,,,,中心频率f0,1.44E+02,（MHz）,中心频率f0,132.9661611,（MHz）
,,,,L,,L,,几何频率f12,3.07E+02,（MHz）,几何频率f12,203.2183908,（MHz）
,,,,,,,,几何频率f21,8.03E+01,（MHz）,几何频率f21,73.66666667,（MHz）
,,,,,C,C,,Δf1-2,2.39E+02,（MHz）,Δf1-2,116.2183908,（MHz）
,,,,,,,,Δf2-1,1.80E+02,（MHz）,Δf2-1,166.3333333,（MHz）
,,,,,,,,带通宽度Fc,1.53E+02,（MHz）,带通宽度Fc,192,（MHz）
,,,,,实用多电感原型,,,阻带宽度,1.80E+02,（MHz）,阻带宽度,166.3333333,（MHz）
,,,,,,,,带阻Q值,0.94443879,,带阻Q值,0.692532089,
,,,,,,,,,,,,,,
（三）、,自动计算陡度系数As（Ωs）。根据陡度系数As、反射系数ρ、反射损耗Aρ、最小衰减Amin等参数从图2-34中选择电路阶数N：,,,,,,,,,,,,
,,低通As=,3.45,,高通As=,1.10,,带通As=,1.17,,带阻As=,1.15,
,,Amin+Aρ=,83.90,(dB),Amin+Aρ=,83.90,(dB),Amin=,70.00,(dB),Amin=,70.00,(dB)
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,
,,,n=2~10(0.01~1dB纹波）的QBSF低通原型滤波器参数,,,,②,,,,,,
,,,,,,,,,,,,,,
阶,g1,g2,g3,g4,g5,g6,g7,g8,g9,g10,,,
1,,,,,,,,,,,,,
2,,,,,,,,,,,,,
3,1.6325,1.436,1.6325,,,,,,,,0.25dB,,
4,,,,,,,,,,,,,
5,1.5046,1.4436,2.4050,1.4436,1.5046,,,,,,0.25dB,,
6,,,,,,,,,,,,,
7,1.7896,1.2961,2.7177,1.3848,2.7177,1.2961,1.7896,,,,0.5dB,,
8,,,,,,,,,,,,,
9,1.7822,1.2921,2.7162,1.3922,2.7734,1.3922,2.7162,1.2921,1.7822,,0.5dB,,
10,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,Lr=,1.37203E-07,H,,,,,,,,,,
低通,Cr=,2.43916E-11,F,,,,,,,,,,
,,,,,,,,,,,,,,
,QBSF多电感型低通滤波器去归一化C、L值：,,,,,,,,,,,,
阶,nH,pF,nH,pF,nH,pF,nH,pF,nH,pF,,,
1,0.00,,,,,,L,L,,,,,
2,0.00,0.00,,,,,,,,,,,
3,223.98,35.03,223.98,,,,,,,,,,
4,0.00,0.00,0.00,0.00,,,C,,C,,,,
5,206.44,35.21,329.97,35.21,206.44,,,,,,,,
6,0.00,0.00,0.00,0.00,0.00,0.00,,,,,,,
7,245.54,31.61,372.88,33.78,372.88,31.61,245.54,,,,,,
8,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,,,,,
9,244.52,31.52,372.67,33.96,380.52,33.96,372.67,31.52,244.52,,,,
10,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,③,,,,,,,
高通,,,,,,,,,,,,,
,,,n=2~10的QBSF原型滤波器参数(高通）,,,（将低通的电容变电感，值取倒数。电感亦然。）,,,,,,,
阶,g1,g2,g3,g4,g5,g6,g7,g8,g9,g10,,,
1,#DIV/0!,,,,,,,,,,,,
2,#DIV/0!,#DIV/0!,,,,,,,,,,,
3,0.6126,0.6964,0.6126,,,,,,,,,,
4,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,,,,,,,,,
5,0.6646,0.6927,0.4158,0.6927,0.6646,,,,,,,,
6,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,,,,,,,
7,0.5588,0.7715,0.3680,0.7221,0.3680,0.7715,0.5588,,,,,,
8,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,,,,,
9,0.5611,0.7739,0.3682,0.7183,0.3606,0.7183,0.3682,0.7739,0.5611,,,,
10,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,,,
,,,,,,,,,,,,,,
,Lr=,1.25649E-08,H,特性阻抗与截止频率为,,,,,,,,,
,Cr=,2.23376E-12,F,可变参数,,,,,,,,,
,,,,,,,,,,,,,,
,QBSF多电感型高通滤波器去归一化C、L值：,,,,,,,,,,,,
阶,pF,nH,pF,nH,pF,nH,pF,nH,Pf,nH,,,
1,#DIV/0!,,,,,,,,,,,,
2,#DIV/0!,#DIV/0!,,,,,C,C,,,,,
3,1.37,8.75,1.37,,,,,,,,,,
4,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,,,,L,L,,,,
5,1.48,8.70,0.93,8.70,1.48,,,,,,,,
6,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,,,,,,,
7,1.25,9.69,0.82,9.07,0.82,9.69,1.25,,,,,,
8,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,,,,,
9,1.25,9.72,0.82,9.03,0.81,9.03,0.82,9.72,1.25,,,,
10,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,,,,,,④,,,,,,,
带通,,,,,,,,,,,,,
,,,,,,,,,,,,,,
,将QBSF低通滤波器去归一化的C、L值：,,,,,,,,,,,,
阶,nH,pF,nH,pF,nH,pF,nH,pF,nH,pF,,,
1,0.00,,,,,,,,,,,,
2,0.00,0.00,,,,,L,,L,,,,
3,127.36,19.92,127.36,,,,,,,,,,
4,0.00,0.00,0.00,0.00,,,,C,C,,,,
5,117.38,20.02,187.63,20.02,117.38,,,,,,,,
6,0.00,0.00,0.00,0.00,0.00,0.00,,,,,,,
7,139.62,17.98,212.03,19.21,212.03,17.98,139.62,,,,,,
8,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,,,,,
9,139.04,17.92,211.91,19.31,216.37,19.31,211.91,17.92,139.04,,,,
10,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,,,
,上表格中电容并电感、电感串电容得：,,,,ω=,9.08E+08,,,,,,,
1,0.00,L,,,,,,,,,,,
,#DIV/0!,C,,,,,,,,,,,
2,0.00,#DIV/0!,L,,,,,,,,,,
,#DIV/0!,0.00,C,,,,,,,,,,
3,127.36,60.91,127.36,L,,,,,,,,,
,9.53,19.92,9.53,C,,,,,,,,,
4,0.00,#DIV/0!,0.00,#DIV/0!,L,,,,,,,,
,#DIV/0!,0.00,#DIV/0!,0.00,C,,,,,,,,
5,117.38,60.59,187.63,60.59,117.38,L,,,,,,,
,10.33,20.02,6.47,20.02,10.33,C,,,,,,,
6,0.00,#DIV/0!,0.00,#DIV/0!,0.00,#DIV/0!,L,,,,,,
,#DIV/0!,0.00,#DIV/0!,0.00,#DIV/0!,0.00,C,,,,,,
7,139.62,67.48,212.03,63.16,212.03,67.48,139.62,L,,,,,
,8.69,17.98,5.72,19.21,5.72,17.98,8.69,C,,,,,
8,0.00,#DIV/0!,0.00,#DIV/0!,0.00,#DIV/0!,0.00,#DIV/0!,L,,,,
,#DIV/0!,0.00,#DIV/0!,0.00,#DIV/0!,0.00,#DIV/0!,0.00,C,,,,
9,139.04,67.69,211.91,62.83,216.37,62.83,211.91,67.69,139.04,L,,,
,8.72,17.92,5.72,19.31,5.61,19.31,5.72,17.92,8.72,C,,,
10,0.00,#DIV/0!,0.00,#DIV/0!,0.00,#DIV/0!,0.00,#DIV/0!,0.00,#DIV/0!,L,,
,#DIV/0!,0.00,#DIV/0!,0.00,#DIV/0!,0.00,#DIV/0!,0.00,#DIV/0!,0.00,C,,
,,,,,,,,,,,,,,
带阻,,,,,,⑤,,,,,,,
,,,,,,,,,,,,,,
,将QBSF高通滤波器以Fc去归一化C、L值：,,,,,,,,,,,,
阶,pF,nH,pF,nH,pF,nH,pF,nH,Pf,nH,,,
1,#DIV/0!,,,,,,,,,,,,
2,#DIV/0!,#DIV/0!,,,,,C,C,,,,,
3,6.77,43.29,6.77,,,,,,,,,,
4,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,,,,,,,,,
5,7.35,43.07,4.60,43.07,7.35,,,L,L,,,,
6,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,,,,,,,
7,6.18,47.97,4.07,44.89,4.07,47.97,6.18,,,,,,
8,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,,,,,
9,6.20,48.12,4.07,44.66,3.99,44.66,4.07,48.12,6.20,,,,
10,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,,,
,上表格中电容并电感、电感串电容得：,,,,ω=,8.35E+08,,,,,,,
1,#DIV/0!,C,,,,,,,,,,,
,#DIV/0!,L,,,,,,,,,,,
2,#DIV/0!,#DIV/0!,C,,,,,,,,,,
,#DIV/0!,#DIV/0!,L,,,,,,,,,,
3,6.77,33.09,6.77,C,,,,,,,,,
,211.62,43.29,211.62,L,,,,,,,,,
4,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,C,,,,,,,,
,#DIV/0!,#DIV/0!,#DIV/0!,#DIV/0!,L,,,,,,,,
5,7.35,33.27,4.60,33.27,7.35,C,,,,,,,
,195.04,4
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