一款低不圆度WLAN 双频天线的设计与实现

Design and Realization of a Dual-Band Antenna with Good Roundness for WLAN Application

摘要: 提出了一种改进型的应用于无线局域网的双频印刷单极子天线。该天线可以覆盖IEEE 802. 11a/ b/ g(2. 4 ~2. 484GHz,5. 15 ~5. 825GHz)频段标准,其回波损耗小于10dB 的阻抗带宽在2. 4GHz 频段可达290MHz(2. 28~2. 57GHz),在5GHz 频段可达5. 53GHz(4. 34 ~9. 87GHz)。另外,在工作频带内,还获得了良好的全向辐射方向图和天线增益。该天线的总体尺寸为22mm×44mm,结构紧凑, 且具有不圆度低、成本低和易于集成等优点, 因此具有十分良好的应用潜质。

Abstract: A improved dual-band printed monopole antenna is proposed in this paper. The antenna can cover the working bands of IEEE 802. 11a/ b/ g(2. 4 ~2. 484GHz,5. 15 ~5. 825GHz). The impedance bandwidth are 290MHz in 2. 4 GHz and 5. 35GHz respectively with returnloss than 10dB. Also, good omni-directional radiation patterns and antenna gain over the operating bands have been obtained. The structure of the proposed antenna is compact and integrated easily with a size of 22mm×44mm. The antenna has a good potential application in WLAN system.