Integrated dual band H-field shielded loop antenna and E-field antenna
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United States of America Patent
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Aug 2, 2005
Grant Date -
N/A
app pub date -
Sep 30, 2004
filing date -
Sep 30, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A dual band antenna system that combines into a single integrated device an H-field shielded loop antenna and an E-field antenna. The system includes an unshielded section bounded on each end by first and second shielded sections, respectively. Input frequency filters are electrically connected to the first shielded section to selectively pass one of a first radio frequency signal or a second radio frequency signal through the first shielded section. Output frequency filters electrically connected to the unshielded section for switching between two paths of transmission and associated modes of operation: (i) a first mode (operating as an H-field antenna) in which an H-field transmission pattern is generated in the first and second shielded sections; and (ii) a second mode (operating as an E-field antenna) wherein an E-field is radiated via the E-field antenna.
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