Broadband mm-Wave Microstrip Antenna with Modified Patch and Ground Plane for 29 100 GHz High-Frequency Wireless Applications

Abstract

Abstract— A novel wideband millimeter-wave (mm-wave) microstrip antenna with modified radiating patch and defected ground structure is proposed for high-frequency wireless communication systems. The
antenna is realized on Rogers RT-Duroid 5880 (εr = 2.2, tan δ = 0.0009) with compact dimensions of 80 × 60 × 1.5 mm³. The measured results confirm an impedance bandwidth of 110%, covering the 29-100 GHz
spectrum with |S11| < −10 dB. The antenna achieves a peak gain of 7.5 dBi and a peak radiation efficiency of 82%, maintaining stable far-field characteristics across the operating band. Excellent agreement
between simulated and measured performance validates the design methodology. With its ultra-wideband response and reliable radiation performance, the antenna is well-suited for mm-wave 5G/6G
communications, satellite links, automotive radar, imaging, and broadband sensing applications.