基于 Rogers RO4350B 与 FR4 基板的微带天线性能对比研究

o investigate the influence of substrate material properties on the performance of microstrip antennas, this paper uses Rogers RO4350B and FR4 as substrates, designs a comparative experiment, and conducts research through the microstrip antenna carrier, focusing on core indicators such as S parameters, gain direction graphs, and three-dimensional gain direction graphs. The simulation is carried out using Ansys Electronics Desktop 2022 R1 - HFSS, and the antenna performance at 2.45GHz frequency is analyzed. The results show that both materials\' antennas achieve good impedance matching. Among them, the S11 of the FR4 material antenna is approximately -30dB, and that of the Rogers RO4350B material antenna is approximately -16dB. On the gain direction graph, the main radiation direction gain of the FR4 material antenna is higher, while the coverage of the Rogers RO4350B material antenna is more uniform. The three-dimensional gain direction graph shows that the former has stronger directionality and the latter has wider coverage characteristics. The research results can provide a basis for antenna material selection in fields such as high-frequency communication and radar.