The “LossyLine” approach to EMI suppression is new and
     unique.
 The principle of the “LossyLine” approach is that
     unwanted
 RF energy travels through a “Lossy” medium
     surrounding the conductor, 
where it is absorbed and
     dissipated. The lossy medium is flexible 
with high RF
     attenuation and low Q. It is ideally suited for application
as
     a microwave low-pass type electro-magnetic
     interference  filter.
 The usual problems inherent in
     conventional reactive types of surpression filters, such as
     mismatch, reflections, grounding, and high VSWR, are
     eliminated. This  approach has proven ideal for the
     elimination 
of undesired RF interference in high frequency
     equipment, such as radar, countermeasures,
     telecommunications, telemetry, etc.

    LSF-7 LossyLine EMI Absorptive Filters

 The heart of a LossyLine Filter is the dissipative element.
 This element embodies a high temperature resisting (175˚C)
  epoxy resin, optimized as a magnetic lossy core, molded
  around the conductor, and case shielded, Hence, a true
  magnetic trap that absorbs rather than rejects or reflects
  unwanted energy. No oil is required to 
cool since there
  is a minimum heating effect, Practically no reactive current
  is present because there is little, if any, shunt capacity.
  LossyLine attenuates 100dB minimum, or beyond of
  standard instrumentation,
 from 100 KHz up to 100 GHz
  and attenuation does not fall off with current. The level of
  RF attenuation at full load currents is maintained because
  of freedom from saturation. The electrical characteristics of
  LossyLine suppress sine waves per MIL-STD-220A, and
  cause the collapse of transient spikes of all kinds, particularly
  those with short rise times.
 

   ST4 LossyLine EMI Suppressant Tubing
 
The new EMI Suppressant Tubing provides a simple,
 low cost efficient means for suppressing unwanted
 EMI. This unique product can be slipped over standard
 wires and cables  (insulated or uninsulated) and
 suppresses both conducted and radiated interference.
 Completely flexible and lightweight, it can be used in
 temperature environments from –55˚ to +250˚C
 without any electrical or mechanical degradation.

 Suppressant Tubing will provide shielding from low
 frequency electrostatic interference, magnetic  fields
 and will not cause DC or low frequency AC losses. It
 is capable of handling RF power exceeding 10 watts
 CW per inch and is available either shielded or unshielded.