Planar single feed circularly polarized microstrip antenna with enhanced bandwidth
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 26, 2000
Grant Date -
N/A
app pub date -
Mar 29, 1999
filing date -
Mar 29, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A microstrip antenna providing circularly polarized radiation formed by two layered cavities with two rectangular conductive patches. A first cavitys formed by a ground plane and a first rectangular conductive patch having a lateral dimension and coupling holes placed therein. A second cavity is formed between the first rectangular conductive path and a second rectangular conductive patch having a longitudinal dimension. The longitudinal dimension of the second rectangular conductive patch is essentially equal to the lateral dimension of the first rectangular conductive patch. The second rectangular conductive patch is coupled through the coupling holes to the first rectangular conductive patch, resulting in circularly polarized radiation. The circularly polarized antenna can easily be manufactured using conventional microstrip techniques. Additionally, bandwidth and power are improved. The antenna has many applications, including military and commercial communication systems, aircraft antennas and global positioning system receivers.
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