BSC – Suspended Substrate



Suspended Substrate Filters

Suspended Substrate StripLine (SSS) filter technology enables high frequency (up to 40GHz) broadband filters to be realised utilising elliptical responses for excellent close-in rejection.

SSS technology utilises a photo-etched, copper-clad dielectric substrate (usually PTFE) secured between silver plated machined casings, to provide outstanding performance in terms of high Q and low insertion loss, combined with a small, lightweight yet rugged construction. This type of filter is ideally suited to broadband applications such as Electronic Warfare systems (ECM, ESM & ELINT). SSS design capability covers the full range of filter structures.

  • Lowpass
  • Highpass
  • Bandpass
  • Bandstop
  • Multiplexer
  • Parabolic Gain Equaliser
  • Linear Gain Equaliser


  • Frequency Range: 500MHz to 40GHz
  • Bandwidth: 10% to multi-octave
  • Extended Stopband: up to 50GHz
  • 60 dB Rejection achieved at 15% from Bandedges (tighter specs available on request)
  • Tight Phase & Amplitude tracking
  • Excellent repeatability, stability
  • Rugged construction for Military environment
  • Customised outlines available
  • Fast prototyping service available