Abstract
In this paper, parabolic refocusing lens is designed for the same requirements as Rotman lens. Comparison of results obtained with the parabolic refocusing lens with those obtained for the Rotman lens is also given.
Highlights
Comparison of results obtained with the parabolic refocusing lens with those obtained for the Rotman lens is given
One focal point F0 is located on the central axis, and two others F1 and F2 are symmetrically located on either side on a parabolic focal arc
A ray originating from F1 may reach the wave front through a general point P(X,Y) on the inner contour I1, transmission line W(N) and point Q(N) on the outer contour,and trace a straight line at an angle –α and terminate perpendicular to the wave front . the ray from F1 may reach the wave front from F1 to the point O1, and through transmission line W(0) to the wave-front
Summary
Inner contour and the transmission lines are designed from the design equations, which are derived using the fact that, at the wave front, all the rays must be in phase independent of the path they travel. This requires that the total phase shift in traversing the path to reach the wave front in each case be equal. Using this concept and referring [2] to figure 1 following design equations are written:
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