[天线]Circularly Polarized Dielectric Resonator Antenna Excited by a Shorted Annular Slot

 Abstract—Excitation of the circularly polarized dielectric resonator .h4 \Y A  
antenna (DRA) using a shorted annular slot is studied in this paper. The 46&/gehr  
new method is demonstrated using a hemispherical DRA. The exact DRA *ppffz  
Green’s function is used in the formulation, and the method of moments s}% M4  
is employed to solve for the equivalent magnetic current in the slot. The >s?S+W[L  
input impedance, axial ratio, and field patterns are found. Measurements `lt"[K<  
were carried out to verify the calculations, with good results. The effects of P(z++A&  
the radius and shorting width of the slot are investigated, and the design :A'y+MnK<  
procedure of the CP DRA is discussed. ';=O 0)u  
Index Terms—Circ .. J6FV]Gpv  
%Qdn  

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