Investigation into a Miniaturized Wideband Parasitic Array Antenna

Compact antennas with broad bandwidth and high gain are essential for modern communication systems, where efficient performance and miniaturization are critical. This work proposes an antenna design incorporating a driver, reflector, and director to achieve these objectives. The driver and director feature conical shapes for bandwidth enhancement, while the reflector adopts a partial spherical shape to promote a directive radiation pattern and to enhance the realized gain toward the director while minimizing the antenna’s electrical size, a kr of 1.05. The measured −10 dB impedance bandwidth of the antenna is 64%. The average realized gain is 8.6 dBi in the direction of the director. These results demonstrate the effectiveness of the proposed design in achieving a compact, high-gain, broadband antenna suitable for advanced communication applications.