Abstract
Side lobe suppression of printed antenna arrays with perpendicular reflector has been analyzed in this article. The arrays are with pentagonal dipoles as radiating elements operating at a second resonance. The used distribution is chosen to enable high side lobe suppressions bigger than 41.5 dB at the frequency of 12 GHz. The feeding network in symmetrical (balanced) microstrip technique with impedance transformers is presented too. The antenna arrays with the high side lobe suppression are very sensitive in small deviation of distribution coefficients from ideal that can results in decreasing SLS values. Therefore, the optimal feeding network with minimal departure from determined distribution is investigated.
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