Linear Phase Lowpass
Custom Built LC Filters - 1 KHz to 100 MHz

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  • VERY LOW PULSE DISTORTION (Low Overshoot and Ringing, Fast Settling Time)

  • Types: Bessel, Gaussian, Equal Phase Ripple and Transitional (Gaussian to 6dB)

    .25dB Maximum Ripple
    1dB Maximum Insertion Loss

GROUP DELAY = NORMALIZED (GROUP DELAY)
(sec.)                          2π Fc (Hz)            

The above graph illustrates the delay characteristics for this family of filters. The table lists typical realizable values for all the electrical specifications.

Shape Factor Man. Phase Distortion (Degrees) Maximum Overshoot (Percent) Typical Delay Variation ( Percent)
A 1.5 1.5% 2.0%
B 1.5 1 .5% 2.0%
C 1.5 1 .5% 2.0%
D * 3.0 3.0% 7.0%
E 7.0 6.0% 12.0%
F 12.0 9.0% 16.0%
  • Frequency Range: 1KHz to 100MHz

  • Impedance Range: 50 ohms to 20K ohms

  • Low Delay and Phase Distortion in Passband Construction: Epoxy encapsulated or sealed in metal can

SIZE (INCHES)

Units normally in metal cans for printed circuit mounting (or end terminals). SMA connectors same size. BNC connectors may require larger cans.

  Metal Cans Encapsulated in Epoxy Case:

L   x   W   x    H

L   x    W    x   H
K1 2.00 x 1.1 25  x .750 W 2.50 x 1.125 x .750
K2 2.50 x 1.1 25  x .750 X 3.00 x 1.500 x 1.000
K3 3.00 x 1.125  x .750 X1 3.00 x 2.000 x 1.000
M 3.00 x 1.625 x 1.125 Y 4.00 x 1.500 x 1.125
M1 3.00 x 2.000 x 1.250 Y1 4.00 x 2.000 x 1.250
N 4.00 x 1.500 x 1.250 Z 4.50 x 2.500 x 1.375
N1 4.00 x 2.000 x 1.250

This family of Linear Phase Lowpass Filters can find applications in every branch of electronics because of their electrical specifications and low cost. They are ideally suited for amplitude, phase and delay matching requirements. The industry-wide increase in data transmission has increased the demand for linear phase designs with good shape factors.

DELIVERY: PROTOTYPES CAN OFTEN BE DELIVERED IN LESS THAN 7 DAYS. CALL FOR SPECIAL SIZES.

ORDER ANY CUT-OFF FREQUENCY FROM 1KHz TO 100MHz. INTERPOLATION BETWEEN TABULATED DATA ALLOWABLE.

 

Cut-Off (Fc)
Frequency
3dB Max.
Impedance
Range (Ohms)
Shape Factor
(See Graph)
Size
Epoxy Metal
1KHz 500-10K A X1 M1
500-10K B Y1 N1
500-10K C Z
500-10K D X1 M1
500-10K E Y1 N1
500-10K F 2.
5KHz 50-20K A X1 M1
50-20K B Y N
50-15K C Y1 N1
50-20K D X1 M1
50-20K E Y1 N1
50-10K F Z
10KHz 50-10K A X M
50-10K B Y N
50-10K C Y N
50-10K D X M
50-10K E Y N
50-10K F Y1 N1
50KHz 50-10K A W K2
50-10K B X M
50- 5K C Y N
50-10K D W K2
50-10K E X M
50-10K F Y N
100KHz 50-1 OK A W K2
50- 5K B X M
50- 5K C Y N
50-10K D W K2
50-10K E X M
50-10K F Y N
500KHz 50- 3K A W K2
50- 3K B W K2
50- 1K C X M
50- 5K D W K2
50- 5K E X M
50- 5K F Y N
750KHz 50- 2.5K A W K2
50- 2.5K B X M
50- 1K C Y N
50- 5K D W K2
50- 5K E X M
50- 5K F X M
1MHz 50-500 A W K2
50-500 B X K3
50-500 C M
50-500 D W K2
50-500 E X K3
50-500 F M
2MHz 50-500 A K2
50-500 B K3
50-500 C M
50-500 D K2
50-500 E K3
50-500 F M
Cut-Off  (Fc)
Frequency
3dB Max.
Impedance
Range (Ohms)
Shape
Factor
(See Graph)

Size

Epoxy Metal
3MHz 50-500 A

 

K2
50-500 B K3
50-400 C M
50-500 D K2
50-500 E K3
50-500 F M
4MHz 50-500 A K2
50-500 B K3
50-200 C M
50-500 D K2
50-500 E K3
50-500 F M
5MHz 50-500 A K1
50-500 B K2
50-200 C M
50-500 ,_ D K2
50-500 E K3
50-500 F K3
7.5MHz 50-500 A K1
50-250 B K2
50-100 C M
50-250 D K1
50-250 E K2
50-250 F K3
10MHz 50-100 A K1
50-100 B K2
50-100 C K3
50-100 D K1
50-100 E K2
50-100 F K3
25MHz 50-100 A K1
50-100 B K2
50-75 C K3
50-75 D K1
50-75 E K2
50-75 F K3
40MHz 50 A K2
50 B K3
50 C M
50 D K2
50 E K3
50 F M
50MHz 50 A K2
50 B K3
50 C M
50 D K2
50 E K3
50 F M
100MHz 50 A K2
50 B K3
50 C M
50 D K2
50 E K3
50 F M
Allen Avionics, Inc.
255 East Second Street, Mineola, NY  11501
Phone: (516) 248-8080 Fax: (516) 747-6724
E-Mail: Info@AllenAvionics.com

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