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在微带贴片天线的基础上,设计了一种介质基板尺寸为34.2mm×34.2mm×1.6mm,材料是FR4(相对介电常数为4.4)的简易差分微带天线,并基于传输线理论给出了差分天线输入阻抗与馈电点间的关系。用软件HFSS对天线进行仿真分析,结果表明:天线工作带宽为2.41~2.47GHz(回波损耗)≤-10dB),适用于无线局域网WLAN 802.11b(2.4~2.48GHz)系统,在工作频段内具有良好的辐射方向性。差分天线把差分信号直接馈入到天线的两个端口,为设计高集成的射频前端提供了新途径。
Based on the microstrip patch antenna, a simple differential microstrip antenna with a dielectric substrate size of 34.2mm × 34.2mm × 1.6mm and a material of FR4 (relative dielectric constant of 4.4) was designed and based on the transmission line theory The difference between the antenna input impedance and feed point. The simulation results show that the working bandwidth of the antenna is 2.41 ~ 2.47GHz (return loss) ≤-10dB), which is suitable for wireless LAN WLAN 802.11b (2.4 ~ 2.48GHz) system and has the function of Good radiation direction. Differential Antenna The direct feeding of the differential signal to the two ports of the antenna provides a new way to design a highly integrated radio front end.