Wideband stacked patch antenna array with reduced sidelobes for Ku-band applications

Abstract

The most important features of microstrip antenna are low cost, low profile, and light weight. But the patch antenna usually has narrow bandwidth. In this paper, for overcoming the mentioned problem, a new approach to obtain a wider bandwidth is proposed. For this purpose, stacked patch above the main patch is used. The design and fabrication method of the proposed antenna is described carefully. Then, a compact microstrip fed line linear array antenna with Taylor amplitude distribution in the feeding network is designed. The measured results show the 10-dB impedance bandwidth of about 23% for the single element and 20% for the linear array. Moreover, the measured side lobe level (SLL) of the array is lower than −21 dB. The results for the simulations and experiments are in a good agreement.