converter for circular polarized wave and linearly polarized wave

摘要

The invention presents a circularly polarized wave-linearly polarized wave transducer using a waveguide characterized by expanding the inner wall of the section vertical to the tube axis of the waveguide in a taper form having a gradient in the tube axial direction, setting the taper gradient in the tube axial direction differently at plural parts in the circumferential direction of the inner wall, thereby producing a difference in the propagation constant of two modes orthogonal at the microwave frequency being used, and determining the taper gradient and overall length of the waveguide so that the phase difference of the two modes may be pi /4 at both ends of the waveguide, and the circularly polarized wavelinearly polarized wave transducer operating securely can be realized in a simple constitution in which the slide core of die in the die-casting process can be drawn out from one direction only by expanding the shape of the section of the waveguide in a taper form with a gradient in the tube axial direction. IMAGE