4th order tubular Bessel lowpass filters
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eeNews Europe
These filters should be regarded as compromise designs for pulsed systems where truthful reproduction of the pulse shape is important. Primarily used on lightwave receivers to reduce the impact of higher order distortion and noise. These high frequency filters are essential for today’s high bit rate applications.
The filters feature 2 W power rating, 50 ohms impedance, temperature rating of -55°C to +85°C and MIL-E-5400, Class 1A environmental conformance.
For example, the LBT-14000 is a 4th order lowpass with a 3 dB point of 14000 MHz and 1 dB point at 0.6 Fc 8400 MHz with a Delta of ±0.4 dB. The maximum overall length for this filter is 1.25 inches.
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