%0 Journal Article
%T Improved Directivity of an OAM Antenna by a Fabry-Perot Cavity: An Experimental Study
%A Wenlong Wei
%A Wenlin Kuai
%A Kourosh Mahdjoubi
%A Christian Brousseau
%A Olivier Emile
%J Open Journal of Antennas and Propagation
%P 65-73
%@ 2329-8413
%D 2021
%I Scientific Research Publishing
%R 10.4236/ojapr.2021.94006
%X The circular phased antenna array is commonly used for generating waves bearing Orbital Angular Momentum (OAM) in the radio frequency band, but it achieves a relatively low directivity. To overcome this drawback, we present here a method to improve the directivity of an OAM circular phased antenna array by embedding it inside a Fabry-Perot cavity. The Fabry-Perot cavity contains three main parts: a partially reflecting surface (PRS), an air cavity and a ground plane. Simulation data show that the directivity of this new OAM antenna achieves an improvement of 8.2 dB over the original array. A prototype is realized and characterized. The simulated and measured characteristics are in good agreement.
%K Circular Antenna Array
%K Fabry-Perot Cavity
%K Orbital Angular Momentum
%K Patch Antenna
%K Phase Shifter
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=114209