Tapered resistive cylindrical parabolic antenna

It is shown that resistive tapers can be placed on reflector surfaces to control the sidelobe level of the reflector. The tapers have the disadvantages of lower gain and a large spillover/transmission sidelobe. However, it is pointed out that the price of lower sidelobes is lower gain, and sometimes the spillover/transmission sidelobe is not important. Computed results are presented. In the examples shown, a Taylor current distribution is projected onto the reflector surface, the resistive taper is calculated using physical optics, and the far-field pattern is calculated and plotted.<>