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Home : Products : LC Filters : Band Pass LC Filters

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
Model

Frequen.

Passband

Insert.
Loss

Ripple
max

Stopband

Zin
Zout
(Ω)

Return
Loss

Temperature
Range
C

Package
LXWXH
mm

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
50

2.200
2.800

50

20 db

-25/ +60

41.3X22.3X19.5

BP9761

10.700

3.0

300 to 450

 

1.0

40
50

2.200
2.800

50

20 db

-25/ +60

41.3X22.3X19.5

BP9760

11.400

3.0

300 to 450

 

1.0
50

40
2.800

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
40

0.3-30
60-150

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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