UWB Circular Fractal Antenna with High Gain for Telecommunication Applications

Area of Science:

• Electrical Engineering
• Electromagnetics
• Antenna Theory

Background:

• Fractal antennas offer unique properties for broadband applications.
• Optimizing antenna geometry is crucial for achieving desired performance metrics like gain and efficiency.
• Ultra-wideband (UWB) technology requires antennas with extensive operational bandwidth.

Purpose of the Study:

• To propose and validate a new, highly efficient fractal antenna with ultra-wideband (UWB) characteristics.
• To investigate the impact of geometric modifications on antenna performance.
• To demonstrate the suitability of the proposed antenna for various wireless communication systems.

Main Methods:

• Design and simulation of a fractal patch antenna with modified geometry.
• Integration of multiple concentric rings with a specific reduction factor.
• Modification of the ground plane shape to enhance impedance matching.
• Fabrication and measurement of a prototype antenna to validate simulation results.

Main Results:

• The simulated antenna exhibits an 8.3 GHz operating band, a gain up to 7.73 dB, and 98% efficiency.
• The prototype achieved a measured impedance bandwidth of 7.33 GHz, 92% efficiency, and 6.52 dB gain.
• The compact antenna (40 × 24.5 × 1.6 mm³) demonstrates excellent agreement between simulated and measured results.
• The antenna effectively covers UWB frequencies suitable for WLAN, WiMAX, and C/X bands.

Conclusions:

• The proposed fractal antenna design successfully achieves ultra-wideband operation with high efficiency and gain.
• The geometric modifications and ground plane adjustments are effective in enhancing antenna performance.
• The validated design is a promising candidate for next-generation wireless communication systems requiring UWB capabilities.