Abstract
Conference Title: 2018 18th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Conference Start Date: 2018, Aug. 19 Conference End Date: 2018, Aug. 22 Conference Location: Waterloo, ON, Canada This paper presents a new ultra-wideband metalonly dipole reflectarray (MODRA) antenna, designed to operate over the frequency range of 10–19 GHz. The proposed structure offers many advantages over the legacy design. For instance, its simplicity and lightweight enable us to develop a large-size reflectarray (RA) antenna, which can be deployed on any platform including a satellite. The proposed MODRA antenna consists of dipole antennas with varying lengths, which is mechanically supported by a rectangular metallic ring and a short-circuited metal strip. Stainless-steel metal has been suggested as the material to use to fabricate the proposed structure. Normal incident simulation shows that at 10 GHz the MODRA antenna realizes 339° phase range when the dipole lengths vary from 1mm to 14mm; furthermore, it realizes a 298° phase range at 19 GHz for the same dipole-length variation. The maximum reflection loss is found to be 0.51 dB and 0.2 dB at 10 GHz and 19 GHz, respectively. Finally, metal-only multi-dipole reflectarray (MOMDRA) antenna is employed as a simple solution to overcome the phase shift limitation of the MODRA antenna. Simulations show that reflection phases of 345° and 657° are realized at 10 GHz and 18 GHz, respectively.