The phased circular array antenna of crossed-loop elements is a small-sized transportable high frequency wide band multibeam receiving antenna with operation band at 3 to 30MHz. Its reception performance is equivalent to twenty or thirty rhombic antennas

as a number of independent directional wave beams can be introduced by Phasing networks. Moreover

it only requires just one tenth of the space for rhombic antenna

because vertical loop element used will not require great installation height

thus reducing first Fresnel region to form a low-elevation main lobe.The paper discusses following theoretical aspects of the said antenna: far-zone radiation field

a direction-controlled weighting factor for crossed-loop element radiation pattern

the dual-direction properties

space radiation patterns

structure of central phasing networks to form multi-directional beams and the mutual coupling problem between array elements.