Antenna
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United States of America Patent
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Jul 19, 2005
Grant Date -
Mar 10, 2005
app pub date -
Sep 9, 2003
filing date -
Sep 9, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
An antenna including a feed network; four or more helical radiating elements, and four or more impedance matching stubs each coupling a respective radiating element to ground in parallel with the feed network. The shunt stubs provide a reactance in parallel with the radiating elements to rotate the desired frequency locus about a constant admittance curve. Specifically, the shunt stubs rotate the desired frequency locus from a low resistance, capacitive impedance to 50 ohms purely resistive. The length of the stubs can be adjusted to control the inductance.
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