Abstract:

In recent years,because of its good system performances,uniform circular array(UCA) antennas have been found broad applications in communication,radar detection,navigation guidance and other fields.In this paper,based on a UCA with a discretionary max-radiation direction,it analyzes the performance of the array pattern with the change of array radius and array unit number.It is found that the greater the radius,the smaller the half power beam width is;however,with the increase in radius,the array occupies more space,which is undeniable for conformal mobile carriers,thus requiring balance.But the number of array units has only minor impact on the array characteristics;therefore it suffices to take the minimum value that can meet the design requirement.

Key words: uniform circular array;array radius;array unit number;pattern