D68BP4 Datasheet, PDF (4/6 Pages) Frequency Devices, Inc. – Fixed Frequency 4-Pole Pair Filters

Appendix A
Band-Pass
4-Pole Pair
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0.1
Amplitude Response Curves
0
Q1
-1
Q2
-2
-3
Q5
-4
Q10
-5
2
3 4 5 6 7 8 _1.0
2
3 4 5 6 7 8 _10.0
0.6
Normalized Frequency (f/fo)
Q1
Q2
Q5
Q10
0.7
0.8
0.9
1.0 ^{1.1 1.2 1.3 1.4 1.5 1.6}
Normalized Frequency (f/fo)
Normalized Theoretical Amplitude Data
Q=1
Q=2
Q=5
Q = 10
Amp
(dB)
-0.10
-0.25
-0.50
-1.00
f_L < f_O < f_H
f/f_o
0.735
f/f_o
1.360
0.709 1.411
0.687 1.456
0.663 1.508
f_L < f_O < f_H
f/f_o
0.856
f/f_o
1.168
0.840 1.191
0.826 1.211
0.811 1.233
f_L < f_O < f_H
f/f_o
0.939
f/f_o
1.064
0.932 1.073
0.926 1.080
0.919 1.088
f_L < f_O < f_H
f/f_o
0.969
f/f_o
1.032
0.965 1.036
0.962 1.039
0.959 1.043
-1.50
-2.00
-2.50
-3.00
-5.00
-10.00
-15.00
-20.00
0.648
0.636
0.627
0.618
0.591
0.539
0.493
0.449
1.543
1.571
1.596
1.618
1.692
1.855
2.027
2.225
0.801
0.793
0.787
0.781
0.762
0.724
0.688
0.650
1.249
1.261
1.271
1.281
1.313
1.382
1.454
1.538
0.914
0.911
0.908
0.905
0.896
0.877
0.858
0.838
1.094
1.098
1.102
1.105
1.116
1.140
1.165
1.193
0.956
0.954
0.953
0.951
0.946
0.936
0.926
0.915
1.046
1.048
1.050
1.051
1.057
1.068
1.080
1.093
-25.00
-30.00
-35.00
-40.00
0.407
0.365
0.326
0.290
2.459
2.737
3.065
3.452
0.611
0.570
0.527
0.484
1.637
1.755
1.896
2.065
0.816
0.791
0.763
0.733
1.226
1.265
1.311
1.365
0.903
0.888
0.872
0.854
1.108
1.126
1.146
1.171
-45.00
-50.00
-55.00
-60.00
0.256
0.225
0.197
0.173
3.908
4.442
5.067
5.796
0.441
0.399
0.358
0.319
2.267
2.507
2.793
3.131
0.699
0.664
0.625
0.585
1.430
1.507
1.599
1.710
0.834
0.811
0.786
0.758
1.199
1.233
1.273
1.320
-65.00
-70.00
-75.00
-80.00
0.151
0.131
0.114
0.099
6.644
7.630
8.774
10.01
0.283
0.250
0.220
0.193
3.530
4.000
4.550
5.193
0.543
0.500
0.457
0.414
1.842
2.000
2.189
2.414
0.727
0.693
0.657
0.618
1.376
1.443
1.523
1.618
41
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