A Novel Electromagnetic Transparent Antenna in Dual-Band Shared-Aperture Array

A novel electromagnetic transparent high-band (HB) antenna can be achieved by loading dumbbell-like slots, U-shaped slots, square-loop slots, and straight slots on the patch dipoles. The HB antenna operates in the band of 1.71–2.69 GHz (VSWR < 1.5), and the dipoles achieve low-scattering property in the band of 3.4–3.8 GHz. In the design, the impedance matching of HB antenna is very good even scattering suppression technique is applied on the dipoles. The loading of U-shaped slots introduces an additional resonance point, which can alleviate the impedance problem caused by the technique. Besides, a dual-band antenna array has been designed and fabricated for validation. Both simulated and measured results show that the HB antenna has a good performance on electromagnetic transparency.