A Printed-RGW-Fed Shared-Aperture Antenna Integrating Ku-Band Magneto-Electric Dipole and Ka-Band Fabry–Perot Radiator

This letter proposes a dual-layer printed ridge gap waveguide (PRGW)-fed antenna with shared-aperture radiation in dual wide bands. The designed antenna incorporates a
Ku
-band magneto-electric (ME) dipole and a
Ka
-band Fabry–Perot (F–P) radiator within a stacked structure. The ground of the
Ku
-band ME dipole, which is periodically etched with slots, is reused as the partially reflective surface (PRS) with a gentle, reflective phase gradient of the F–P radiator. In addition, the mushroom-shaped electromagnetic band-gap array for the
Ku
-band PRGW is shared as the radiation source of the
Ka
-band F–P radiator. Consequently, the upper ME dipole operates within the frequency range of 14.4 GHz to 15.7 GHz, while the lower F–P radiator operates from 25.2 GHz to 30.4 GHz. The
Ku
- and
Ka
-band radiators both show high-gain broadside radiation with their peak realized gains of 10.8 dBi and 11.6 dBi, respectively.