• A novel direction finding (DF) antenna is presented. The antenna uses interferometry with the three low-order circular phase-modes (CPMs) (-1, 0, +1) to estimate the directio-of-arrival (DOA) of a received microwave signal both in Azimuth and Elevation in the frequency range of 9-15[GHZ]. The antenna consists of two structures positioned one above the other: A bi conical dipole antenna and a novel two ports waveguide feed forming left and right...
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