Abstract
In this paper, a switched-beam radiation pattern reconfigurable antenna (RPRA) is presented using a proximity-coupled patch with parasitic elements. The proposed antenna, called the Sunflower RPRA for its physical resemblance, has multiple pattern states selected by RF switches. The proposed two-board design uses a circular patch along with eight pedal-shaped peripheral parasitic elements connected via switches. The antenna directs the beam to an oblique elevation angle of 30° relative to the patch-normal, while the azimuth direction can be controlled in steps of 45° based on the state of the switches. Simulation results show that the antenna is impedance matched in all states (< −10 dB) and that the gain in each directional state is 5.7 dBi at 2.6 GHz. In addition, there is an omnidirectional state with a 3.25 dBi gain across all azimuth angles.
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