Band Pass LC Filters:
A bandpass filter provides good transmission within its passband frequencies (Fc1 to Fc2) and lower frequencies. An abrupt change from the passband to the stopband is not feasible in real filters. Therefore, reasonable guard bands are provided by specifying lower and upper stopband frequencies (Fr 1 and Fr 2) where specified levels of rejection (Ar 1 and Ar 2) are to be achieved and maintained.
Bandpass filters are used to suppress harmonics and sub-harmonics and other spurious outputs from impacting associated equipment. Strong signals below and above the passband frequencies are suppressed to provide a clear processing frequency band.
Good passband quality may be defined as low reflection, low insertion loss and flat time delay. In general, increasing selectivity results in decreasing passband quality. Circuit complexity is proportional to selectivity as the ratio (Fr-Fr1)/(Fc2-Fc1) decreased toward 1.0 which more circuit branches are required.
|
OPT |
Frequen. |
Passband |
Insert. |
Ripple |
Stopband |
Zin |
Return |
Temperature |
Package |
||
MHz |
db |
KHz |
dB |
dB |
db |
KHz |
|||||
|
BP2815 |
2.850 |
2.5 |
100 |
6.0 |
2.5 |
60 |
2.000 |
200 |
|
-20/ +60 |
76.2X25.4X10.1 |
|
BP9759 |
10.000 |
3.0 |
300 to 450 |
|
1.0 |
40 |
2.200 |
50 |
20 db |
-25/ +60 |
41.3X22.3X19.5 |
|
BP9761 |
10.700 |
3.0 |
300 to 450 |
|
1.0 |
40 |
2.200 |
50 |
20 db |
-25/ +60 |
41.3X22.3X19.5 |
|
BP9760 |
11.400 |
3.0 |
300 to 450 |
|
1.0 |
40 |
2.200 |
50 |
20 db |
-25/ +60 |
41.3X22.3X19.5 |
|
BP2814 |
20.000 |
2.5 |
1,000 |
6.0 |
2.5 |
60 |
4.000 |
200 |
|
-20/ +60 |
72.2X25.4X19.1 |
|
BP2813 |
30.000 |
2.5 |
1,000 |
6.0 |
2.5 |
60 |
4.000 |
200 |
|
-20/ +60 |
72.2X25.4X19.1 |
|
BP9705 |
45.000 |
3.0 |
5,000 |
2.5 |
0.5 |
30 |
0.3-30 |
50 |
|
-55/ +85 |
38.1X34.3X17.2 |
|
BP9706 |
70.000 |
3.0 |
8,000 |
3,0 |
0.5 |
60 |
60.0 |
50 |
|
-55/ +85 |
25.4X21.6X10.8 |
|
BP9709 |
130.000 |
3.0 |
44,000 |
2,0 |
0.5 |
30 |
+/- 30 |
50 |
|
-40/ +85 |
38.1X34.3X17.2 |
|
BP9572 |
276.000 |
3.0 |
10,000 |
5,0 |
0.5 |
35 |
30.000 |
50 |
15 db |
-20/ +60 |
54X12.7X9 |
|
BP9707 |
400.000 |
3.0 |
14,000 |
5,5 |
0.2 |
60 |
160,000 |
50 |
|
-55/ +85 |
38.1X34.3X17.2 |
|
BP9708 |
790.000 |
1.0 |
40,000 |
3,5 |
0.5 |
60 |
250,000 |
50 |
|
0 / +70 |
19.1X15.3X8.0 |
BP F5690 256.50 MHz
BP F5415 2.25 MHz
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