New Configurations of Low-Cost Dual-Polarized Printed Antennas for UWB Arrays

[摘要] A novel class of structures is proposed to realize ultra-wide-band radiating elements for large arrays,providing dual polarization, beam scanning, and compact and inexpensive realization based on suitablerhombic arrangements of dipoles printed on low-cost layered substrates. In a first implementation, fourrhombic shapes, orthogonally placed on the same layer, provide two orthogonal polarizations. In a secondimplementation, the two polarizations are excited by two rhombic shapes printed on two different layersin a stacked-patch-like arrangement. This latter structure leads to a better lateral shielding of the singleradiating element, in order to reduce mutual interactions among adjacent elements in array environment. The behavioral features of these antennas have been tested with various parametric analyses. Practicalaspects have been addressed such as the choice of appropriate feeding and of commercially availabledielectric layers. The resulting antennas are matched at the input ports in an extremely wide range offrequencies (5–25 GHz), covering various microwave applications, such as aircraft surveillance, weatherpolarimetric radars, and control and communications systems. Good radiating features, in terms of patternshape and gain, are observed in a large band of frequencies. The basic scanning performance of largeand small array configurations is finally investigated.

[学科分类] 电子、光学、磁材料