Frequency Range from 500 Hz to 200 MHz

Bessel Bandpass Filters exhibit a constant time delay through the filters passband. Available packages include PCB, radial RF pins, SMT, SMA and BNC connectorized cases. These are available for RF and microwave applications including data acquisition, receivers and transmitters. Specify any center frequency from 500 Hz to 200 MHz.

Series NumberNumber of Pole Pairs (Elements)Bandwidth Selection -3dBc
KT22 (4)3% to 10% fo
KT33 (6)3% to 10% fo
KT44 (8)3% to 10% fo
KT55 (10)3% to 10% fo
KT66 (12)3% to 10% fo
  • Operating Temperature Range:
    0°C to +70°C
  • VSWR at fo: 1.5:1 Typical
  • Input Power: 20 mW
Part Number Derivation:
  1. Series, KT
  2. Number of poles, 4
  3. “R” RoHS compliant. Allow for longer lead time.
  4. The Notch Frequency, fo
  5. The -3dBc passband bandwidth. It may also be specified as a percentage of fo. Thus, instead of 4.32 kHz, use 3P.
  6. Terminations
  7. Case selection from the case selection guide.
For assistance please call 1-716-532-2234 or email us at
All TTE products are Made in the USA.  Most are delivered within 2-3 weeks.  Expedited lead times of  3-5 days are available on many products
More information about TTE’s custom design expertise is provided in Capabilities.