Artemis is Nasa’s return-to-the-moon programme. The project’s first mission, known as Artemis I, involved an uncrewed Orion ...
Abstract: We propose a directive antenna for borehole radar using a horizontally polarized wave in a vertical borehole. This antenna is an array of several horizontal loop antennas, arranged ...
Abstract: In this letter, a closed-loop cross-dipole antenna array (CLCDAA) is proposed for wideband orbital angular momentum (OAM) communication. The proposed antenna array is designed based on a ...
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