PROJECT TITLE :
Tri-polarised antenna – a virtual rotatable dual-polarised antenna used in polarised beampattern synthesis
Tri-polarised antennas are exploited to synthesise the optimal polarised beampattern during this study. 1st, the characteristics of a single tri-polarised antenna are studied with an infinite current sheet model. Using the cross-product algorithm, the authors notice that three co-located orthogonal current sheets are equivalent to a pair of orthogonal current sheets in a particular orientation. It implies that the tri-polarised antenna is just just about reminiscent of a rotatable dual-polarised antenna. Then by formulating the problem during a convex type, they adopt the convex optimisation algorithm to synthesise optimal polarised beampattern of the tri-polarised array. The simulation results show that thanks to the increased orientation degree of freedom, the sidelobe and cross-polarisation level of tri-polarised array are considerably under the twin-polarised array.
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