Patent ID: 6624715
Filing Date: 2003-09-23
Classification: H01P

Abstract:
An ultrawide-band linear-circular polarization converter comprising:a waveguide having two orthogonal axes, which consist of a long axis and a short axis, in cross-section with different dimensions, the waveguide having negative-phase characteristics, wherein a phase of the long-axis and a phase of the short-axis have different phase delays as waves propagate through the waveguide in a direction of the long-axis and the short-axis, and a phase difference between the long-axis and the short-axis gradually decreases as a frequency increases within an ultrawide-band frequency range; and a dielectric member which extends along the short axis in the waveguide and which is arranged in a waveguide axis direction, the dielectric member having positive-phase characteristics, wherein the phase of the long-axis and the phase of the short-axis components have different phase delays as waves propagate through the dielectric member in the direction of the short-axis and the long axis, and the phase difference between the long-axis and the short-axis gradually increases as the frequency increases within the ultrawide-band frequency range, wherein complementary phase characteristics combining the negative-phase characteristics and the positive-phase characteristics are exhibited in accordance with an arrangement of the dielectric member.