Dual Band and Beam-Steering Antennas Using Reconfigurable Feed on Sierpinski Structure

Abstract EN

Fractal patch antennas based on the Sierpinski structure are studied in this paper.

The antennas operate at dual bands (around 2 and 5 GHz) and are designed to steer the beam directions at around 5 GHz band (the first harmonic).

The antennas use reconfigurable triple feeds on the same antenna plane to have three beam directions.

The same scale factor defines the geometrical self-similarity of the Sierpinski fractal.

The proposed antennas are fabricated through three iterations from 1st order to 3rd order and utilize FR-4 (εr = 4.4) for the microwave substrate.

The performances of the antennas, such as reflection coefficients and radiation patterns are verified by simulation and measurement.

The results show that the properties of the proposed antennas in three orders are similar.