An investigation of side lobe suppression in integrated printed antenna structures with 3D reflectors

Abstract

The paper discusses the problem of side lobe suppression in the radiation pattern of printed antenna arrays with different 3D reflector surfaces. The antenna array of eight symmetrical pentagonal dipoles with corner reflectors of various angles is examined. All investigated antenna arrays are fed by the same feeding network of impedance transformers enabling necessary amplitude distribution. Considering the different reflector surfaces, the influence of parasitic radiation from feeding network on side lobe suppression is studied to prevent the reception of unwanted noise and to increase a gain.

Frequency scanning antenna arrays with metamaterial based phased shifters

“…Two main factors, which determine the sidelobe levels (SLLs), are the power distribution between the elements and the distance between them. Typical demands are SLLs -20 dB [1], relative to the main lobe. SLLs from -30 to -20 dB can be typically achieved solely by the power distribution, but for higher lobes suppression, the distance between the elements must be considered as well.…”