In this paper a novel slot-coupling feeding technique is used to feed a circularly polarized patch antenna. The antenna is fed through two microstrip lines which are excited 90° out-of-phase and coupled to a square patch by means of a square ring slot realized in the feeding network ground plane. Design procedure and simulation results are shown for a 2�2 array working in the WiMax 3.3-3.8 GHz frequency band. Due to both the symmetry properties of the novel slot-coupling feeding technique and the implementation of a sequential rotation technique, excellent axial ratio performance is achieved in a wide frequency band where return loss is greater than 10dB and axial ratio is less than 3dB for any direction in the antenna main beam.
A novel slot-coupling feeding technique for circularly polarized patch antennas
BUFFI, ALICE;CASO, ROBERTO;NEPA, PAOLO;MANARA, GIULIANO
2010-01-01
Abstract
In this paper a novel slot-coupling feeding technique is used to feed a circularly polarized patch antenna. The antenna is fed through two microstrip lines which are excited 90° out-of-phase and coupled to a square patch by means of a square ring slot realized in the feeding network ground plane. Design procedure and simulation results are shown for a 2�2 array working in the WiMax 3.3-3.8 GHz frequency band. Due to both the symmetry properties of the novel slot-coupling feeding technique and the implementation of a sequential rotation technique, excellent axial ratio performance is achieved in a wide frequency band where return loss is greater than 10dB and axial ratio is less than 3dB for any direction in the antenna main beam.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
