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A wideband Global Navigation Satellite System (GNSS) bifilar helix antenna for unmanned aerial vehicle (UAV) applications is presented here. The antenna is designed to fit inside the vertical stabilizer of the Dakota UAV. The antenna is fabricated using a novel direct write thermal spray technology. A feeding network insert is designed incorporating a hybrid providing a balanced 200- output...
A characteristic mode analysis of an electrically large bifilar helix is presented in this paper. Characteristic mode analysis is typically performed on electrically small to intermediate size antennas for simplicity. When the antenna becomes electrically large, there are many modes and it is difficult to identify the dominant modes. A procedure for determining the important characteristic modes is...
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