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Device for measuring, at a plurality of points of a surface, the microwave field radiated by a source

  • US 5,430,369 A
  • Filed: 01/11/1993
  • Issued: 07/04/1995
  • Est. Priority Date: 06/14/1990
  • Status: Expired due to Term
First Claim
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1. A device for measuring at a plurality of points the microwave field radiated by a source (1), said device comprising:

  • at least one antenna (3) loaded by at least one diode (4) at each of said points, said points being distributed over a surface (30);

    means (1, 10;

         5) for collecting the microwave radiation coming from each of said antennas (3), so as to produce a collected microwave signal (MC), said source and said collecting means being arranged on the same side of said surface (30) and in the vicinity of each other so that the path (93) from said source (1) towards said surface (30) and the path (31) from said surface (30) towards said collecting means (1, 10;

         5) are close to each other,multiplexing means (7) arranged between said generating means (6) and each of said diodes (4);

    an addressing circuit connected between said multiplexer and each of the diodes;

    means (8) for controlling said multiplexer means (7) so that at least one of said diodes (4) is addressed by said low-frequency signal (B) and, in response to said low-frequency signal (B) and collected microwave signal (MC), a signal (SI) is produced that is representative of the microwave field at the points where said antennas (3) having diodes (4) addressed by said low-frequency signal are located; and

    a layer (32) of microwave radiation absorbing material located on the side of said surface (30) opposite that of said source (1) and of said collector means (1, 10;

         5), said layer being located between said surface and the other face (32) said addressing circuit (33) so that said addressing circuit (33) is connected to each of said diodes via connections (35) which pass through said layer (32).

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