Dual orthogonal monopole antenna system
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United States of America Patent
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-
Nov 23, 1999
Grant Date -
N/A
app pub date -
Jun 12, 1996
filing date -
Jun 12, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An antenna system for use in wireless communication systems that is based on a pair of monopole antennas, which are electrically isolated from each other and arranged generally orthogonally. A feed circuit is coupled to the first and second monopole antennas, which connects them to a host system. Also, a ground plane conductor extends generally between the feeds for the first and second monopole antennas to improve isolation. The monopole antennas are formed on a printed circuit board, formed on first and second dielectric layers. A ground plane conductive film is disposed between the dielectric layers. The first monopole antenna is formed on an outside surface of the first dielectric layer, and the second monopole antenna is formed on the outside surface of the second dielectric layer. The second monopole antenna is arranged generally orthogonally to the first monopole antenna. The first and second monopole antennas comprise impedance matched microstrips, and the feed circuit comprises a first impedance matched unbalanced line coupled to the first monopole antenna, and a second impedance matched unbalanced line coupled to the second monopole antenna.
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