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Enhanced Flat Loop Antenna

IP.com Disclosure Number: IPCOM000106518D
Original Publication Date: 1993-Nov-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Brasiau, N: AUTHOR [+6]

Abstract

Disclosed is a structure consisting of a flat high magnetic permeability (HMP) solid that makes a zig-zag as it passes through the center of a pickup loop. The HMP solid lies flat against the plane of the loop but above the plane of the loop on one side and below the plane of the loop on the other side to form a two-dimensional structure.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 83% of the total text.

Enhanced Flat Loop Antenna

      Disclosed is a structure consisting of a flat high magnetic
permeability (HMP) solid that makes a zig-zag as it passes through
the center of a pickup loop.  The HMP solid lies flat against the
plane of the loop but above the plane of the loop on one side and
below the plane of the loop on the other side to form a
two-dimensional structure.

      The problem is enhancing the performance of flat loop antennas
by increasing the magnetic field coupling to the antenna while also
reducing the directional sensitivity of the loop antenna without
producing a three-dimensional structure.  High magnetic permeability
solids such as ferrite cores may be used to couple magnetic flux to
the loop.  However, the solid core must pass through the interior of
the loop in a direction that is perpendicular to the plane of the
loop.  For instance, antennas for AM radios may be made by wrapping
the turns of a coil about a ferrite rod.  However, these structures
are three dimensional.  A flat or two-dimensional structure is
desired.

      The solution to the problem is a structure consisting of a flat
HMP solid that makes a zig-zag as it passes through the center of a
pickup loop.  The loop may be a thin coil of wire or a coil
fabricated as a set of conducting lines on a film substrate.
Although the HMP film is essentially flat, it has a section which
passes through the center of the loop in a direction perpendicular to
the plane of the loop. ...