High-Gain Wide-Band Yagi-Uda Antenna for Millimeter-Wave Applications

Abstract

As the need for high-speed wireless communication continues to grow, millimeter-wave (mm-wave) technologies have become essential for next-generation wireless systems, such as 5G and beyond. High-gain, wide-band antennas are crucial in these applications to ensure efficient signal transmission and reception. In this work, a wide-band, high-gain mm-wave printed Yagi-Uda antenna has been designed for operation in the 58–68 GHz frequency band. The proposed antenna features a bowtie-driven element, three two-arm reflectors, and four rhombus-shaped directors, designed to enhance gain and bandwidth performance. At 63 GHz, the antenna achieves a maximum gain of 12 dB and a best side lobe level (SLL) of −15 dB. Across the entire operational band, the gain remains above 10 dB, while the SLL is maintained below −12 dB, ensuring stable and efficient performance. The compact design, with total dimensions of 15.6 mm $\times 8.5$ mm, makes it suitable for integration into modern mm-wave communication systems. To validate the proposed design, a prototype is fabricated, and experimental assessments of return loss, radiation patterns, gain, and SLL are conducted. Numerical simulations and experimental measurements exhibit strong agreement, confirming the antenna’s effectiveness in high-frequency applications.