W. Wei, K. Mahdjoubi, C. Brousseau, A. Sharaiha, O. Emile
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Horn antenna for generating Orbital Angular Momentum (OAM) waves
We present a novel horn antenna to generate radio waves bearing Orbital Angular Momentum (OAM) by using a circular waveguide. The OAM mode ℓ = 1 is generated by using a spiral phase plate (SPP) inside a circular waveguide. We present here two methods to transform the classical guided modes to OAM wave. The resulting electrical field distribution and the radiation patterns evidence the properties of waves carrying OAM.
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