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在简单矩形微带天线的基础上,通过加一容性馈电贴片设计了一种应用于WLAN的微带天线。通过在矩形微带天线对角线馈电的方式实现了双频;容性馈电贴片的引入,抵消了因馈电探针过长而使天线输入阻抗呈感性的影响,从而展宽了天线的阻抗带宽。仿真结果表明,当回波损耗S11<–10 dB时,天线在2.44 GHz处带宽为120MHz(2.38~2.50 GHz),增益为5.7 dB;在5.42 GHz处带宽为1 GHz(5.12~6.12 GHz),增益为8.4 dB。该天线全面覆盖了WLAN所要求的频段,且性能良好,结构简单。
Based on the simple rectangular microstrip antenna, a microstrip antenna applied to WLAN is designed by adding a capacitive feed patch. The dual-frequency is achieved by feeding the rectangular microstrip antenna diagonally. The introduction of the capacitive feed patch compensates for the inductive influence of the antenna input impedance due to the length of the feeding probe, thereby broadening the antenna The impedance bandwidth. The simulation results show that the antenna has a bandwidth of 120MHz (2.38 ~ 2.50GHz) at 2.44GHz and a gain of 5.7dB when the return loss S11 <-10dB. The bandwidth is 1GHz (5.12 ~ 6.12GHz) at 5.42GHz, The gain is 8.4 dB. The antenna fully covers the frequency bands required by the WLAN, and the performance is good and the structure is simple.