Loop-loaded printed dipole array design for a dual-band radar application

A loop-loaded printed dipole (LLPD) antenna array is introduced for a dual-band radar application operating at 3.0/5.5 GHz bands. A pair of loops is placed on or underneath the dipole aperture, providing dual-band operation without deteriorating the gain performance. It is numerically demonstrated that the proposed arrays offer almost 15% impedance bandwidths at designated frequencies. The full-wave analyses of the LLPD designs have been carried out using CST Microwave Studio, and cross-comparisons are provided using Ansoft HFSS.