Multiple-ring circular array for ground-penetrating radar applications: basic ideas and preliminary results

In this paper, the possibility of using a multiple- ring circular array as an antenna array for Ground-Pene- trating Radar systems is investigated. The theory behind the proposed idea is presented. The preliminary numerical re- sults that are obtained suggest that the proposed configura- tion is promising. It allows achieving a wide frequency band and low dynamic range ratio of excitations, thus simplifying the feeding network. Further interesting requirements may be satisfied by exploiting a combination of deterministic and stochastic synthesis techniques to design the array