From: snarfy@cruzio.santa-cruz.ca.us
Newsgroups: sci.physics
Subject: Radar Invisibility
Keywords: Swirls Sux Flux
Date: 28 Aug 92 17:46:52 GMT
Reply-To: snarfy@cruzio.santa-cruz.ca.us


                            STREET SHEET TECH BRIEF # 4

                    " In Search of ...the Lost Mach Principle"

                              PART ONE (continued)

                               RADAR INVISIBILITY

     Before  continuing  with  the development of our matter/electromagnetic
   field unification equations - it may  be  helpful  to  set  a  "goal"  or
   objective  for our efforts so that we may keep in mind exactly what it is
   we are trying to accomplish. Imagine yourself being placed in charge of a
   WWII naval research effort find an effective defense against enemy radar.
   One of your engineers makes  the  astute  observation  that  enemy  radar
   pulses are of a very narrow bandwidth in the 2 Ghz range . The success of
   the  enemy's  detection process depends on the fact that at least some of
   the energy from these pulses are reflected back towards the  enemy  radar
   antenna  ,rather  than  absorbed by your ship. Is there a way to make our
   ships absorb more of the enemy's radar energy , perhaps re-radiating this
   energy  at  another  frequency  ,outside  of  the  frequency  that  thier
   equipment was designed to detect?

     An interesting proposal, but what known physical processes can we point
   to which would lead us to think that such a  frequency  conversion  could
   take place? Or indeed be manipulated artificially?

     An  example  that immediately comes to mind , when considering metallic
   radar targets such as iron battleships , is the losses that occur in  the
   iron  cores  of  transformers  and  inductive  ballasts (solenoids). In a
   transformer that is delivering power to a load , the energy that  is  not
   transferred  to the load is converted to electromagnetic radiation in the
   form of heat (infrared). What might start out as  a  60  cycle  input  is
   amazingly  upconverted  by  some  process into a THz output!

    Now , as we consider the possibilities, we know that  the  phenomena  we
   call  transformer  "losses"  can  be  controlled  to  a certain extent by
   laminating the cores of these units. Physically, the  idea  is  keep  the
   permeability  ,  or  p factor of our transformer core the same (or nearly
   so) while at the same time limiting the eddy current activity in the core
   which produces the "objectionable" drain on our energy . If we limit  the
   contact  that one contiguous section of our core has with another ,we can
   limit the eddy current ampere values .  This  basic  separation  idea  is
   usually  carried  to  it's  practical limits by pulverizing core material
   into powder  ,then  coating  the  powder  with  a  thin  film  "membrane"
   dielectric ,which also acts as a bonding agent for the powder.

    Our  experimental  objective then , is the reverse of the above. We want
   to actually INCREASE the amount of energy absorbed from an  input  signal
   (a  radar  pulse)  ,perhaps  to the point that any reflected signal is so
   weak that it is effectively lost in the "mud" (background noise)  and  is
   therefore "invisible" to the enemy's radar apparatus.

    Radio wave propagation has often been described using  the  means  of  a
   fluid  analogy  ,i.e.  "ripples" in a pond of water.  This description is
   somewhat limiting , given the four dimensional  nature  of  ripples  (one
   dimension each for frequency , amplitude, linear distance from the source
   and  radial direction) . Radio waves have an additional dimension in that
   they can be detected in other than a single  planar  orientation  to  the
   transmitter.  The  fluid analogy of a whirlpool is still helpful, however
   for the purposes of visualization  of  the  overall  effect  we  want  to
   achieve .

    An enemy radar set sends out "ripples" of energy onto our  matter  field
   "pond".  The  hope  is  that  some  of  these  ripples  will impinge upon
   something "solid" , bounce off and return to the radar site as  an  echo,
   or  reflected  wave.   The enemy detects these reflected waves at a later
   time by means of a rotating antenna. The distance and  direction  to  the
   target  are  derived  by noting the antenna's orientation at the time the
   signal is transmitted, and the time the reflected signal takes to  return
   to the receiver.

    Suppose  now that the transmitted ripples encounter a "whirlpool" in our
   matter field "pond" .  For those  inclined  to  experiment  ,  fill  your
   bathtub with water ,then pull the stopper to create the whirlpool. If you
   make  a  disturbance  in  the  water  to  the effect of producing ripples
   adjacent to the swirl, you can observe that the ripples  actually  become
   distorted in amplitude ,frequency ,and radial direction the closer to the
   swirl  they  approach.  The "unfortunate" ripples headed straight for the
   drain are "sucked in" never to be "heard from" again.

    As the person in charge of anti - radar research ,  you  would  have  to
   conclude  that  experimentation along these lines might prove worthwhile.
   Your engineers and technicians are given  the  go-ahead.  Volunteers  are
   recruited for a full scale test.

    To be continued.....
Newsgroups: sci.physics