Low Sidelobe Level Antenna Array with Amplitude Tapering

Abstract

This paper proposes an antenna array with a feeding network to obtain low side lobe levels. The design procedure for a feeding network which uses Dolph-Tschebyscheff distributed coefficients is presented in this paper. The Dolph- Tschebyscheff coefficients has been calculated to get −20 dB side lobe level. The shunt connected series feeding network has been designed according to coefficients. By adding delay lines to the output of the feeding network, the radiation pattern of the antenna has been directed to the desired angle. It is observed that the side lobe level has been reduced to −15 dB. The proposed feeding network can help to reduce the side lobe level of linear antenna arrays.