초록 ▼

A wideband circularly polarized antenna comprises a crossed-element spatial quadrature arrangement of log-periodic antenna elements. The orientation of one of the antenna arms of each diametrically opposed pair of arms is reversed from four port rose configuration, so that the antenna arms of each o

A wideband circularly polarized antenna comprises a crossed-element spatial quadrature arrangement of log-periodic antenna elements. The orientation of one of the antenna arms of each diametrically opposed pair of arms is reversed from four port rose configuration, so that the antenna arms of each of the two pairs of elements have mutual mirror symmetry. As a result, each pair of antennal arms may be fed by phase quadrature ports of the same ninety degree hybrid, thereby significantly reducing the complexity of the feed network.

대표청구항 ▼

[ What is claimed:] [1.] A crossed-element antenna comprising:a spatially quadrature distribution of four antenna elements, each of which has the same two dimensional geometrical configuration, and wherein diametrically opposed ones of a first diametrically opposed pair of said four antenna elements

[ What is claimed:] [1.] A crossed-element antenna comprising:a spatially quadrature distribution of four antenna elements, each of which has the same two dimensional geometrical configuration, and wherein diametrically opposed ones of a first diametrically opposed pair of said four antenna elements are spatially orthogonal to diametrically opposed ones of a second diametrically opposed pair of said four antenna elements, have mutually relative mirror symmetry and are coupled to a first phase port of a signal interface, and wherein said diametrically opposed ones of said second diametrically opposed pair of said four antenna elements have mutually mirror symmetry and are coupled to a second phase port of said signal interface; andthe signal interface having phase quadrature ports, one of which is coupled to said first diametrically opposed pair of said antenna elements, and said second of which is coupled to a second diametrically pair of said antenna elements.