Dual-linear-polarized, highly-isolated, crossed-dipole antenna and antenna array
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United States of America
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Jan 7, 2020
Grant Date -
May 9, 2019
app pub date -
Jul 18, 2018
filing date -
Jul 18, 2018
priority date (Note) -
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Abstract
A dual linear polarized dipole antenna (and arrays of such antennas) having high isolation between ports. The antenna may include a pair of crossed (collocated) bent (angled) dipole antenna elements which are excited by a unique dual-polarized feeding structure. The antenna elements may be printed. Stripline feeding along with substantially symmetrical and substantially identical radiative (e.g., “radiating”) elements results in high level of port isolation. Sub-ground planes may be positioned about the stripline on both sides of a balun block to limit or reduce parasitic stripline radiation, thereby improving polarization purity. Polarization purity may be additionally reinforced by a principal ground plane which isolates the radiative elements from the baluns. The antennas and antenna arrays may be used, for example, for weather observation and air surveillance.
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