A compact dual-circularly polarized cavity-backed ring-slot antenna
09 Feb 2017A low profile dual-circularly polarized printed ring-slot antenna with a small footprint, which radiates above an open cavity loaded with an artificial magnetic conducting reflector, is presented. The feed network consists of two T-shaped capacitive feed structures connected to a miniaturized hybrid branch-line coupler. Experimental results for a final antenna design (with a size of 0.5λ0 × 0.5λ0 × 0.057λ0) show a 4% isolation bandwidth between the two ports of the dual-circularly polarized antenna and a maximum gain of approximately 6.8 dBic. Good front-to-back ratios and low cross-polarization were achieved. These very compact and low profile antennas are suitable for 2.4 GHz wireless local area network (WLAN) communication systems.
| Authors: | Ferreira, Riaan, Joubert, Johan, Odendaal, J.W. (Johann Wilhelm) |
| Institution: | University of Pretoria |
| Keywords: | Cavity backed antennas, Circular polarization, Electromagnetic bandgap (EBG), Materials, Microstrip couplers, Slot antennas, Wireless local area network (WLAN), Cavity backed antennas, Circular polarization, Electromagnetic bandgap (EBG), Materials, Microstrip couplers, Slot antennas, Wireless local area network (WLAN), Cavity backed antennas, Circular polarization, Electromagnetic bandgap (EBG), Materials, Microstrip couplers, Slot antennas, Wireless local area network (WLAN), Cavity backed antennas, Circular polarization, Electromagnetic bandgap (EBG), Materials, Microstrip couplers, Slot antennas, Wireless local area network (WLAN), Cavity backed antennas, Circular polarization, Electromagnetic bandgap (EBG), Materials, Microstrip couplers, Slot antennas, Wireless local area network (WLAN), Cavity backed antennas, Circular polarization, Electromagnetic bandgap (EBG), Materials, Microstrip couplers, Slot antennas, Wireless local area network (WLAN), Cavity backed antennas, Circular polarization, Electromagnetic bandgap (EBG), Materials, Microstrip couplers, Slot antennas, Wireless local area network (WLAN), Cavity backed antennas, Circular polarization, Electromagnetic bandgap (EBG), Materials, Microstrip couplers, Slot antennas, Wireless local area network (WLAN), Cavity backed antennas, Circular polarization, Electromagnetic bandgap (EBG), Materials, Microstrip couplers, Slot antennas, Wireless local area network (WLAN), Cavity backed antennas, Circular polarization, Electromagnetic bandgap (EBG), Materials, Microstrip couplers, Slot antennas, Wireless local area network (WLAN), Cavity backed antennas, Circular polarization, Electromagnetic bandgap (EBG), Materials, Microstrip couplers, Slot antennas, Wireless local area network (WLAN) |