Altaf Amir, Seo Munkyo
Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 440-746, Korea.
Sensors (Basel). 2020 Feb 19;20(4):1137. doi: 10.3390/s20041137.
In this paper, a new dual-band circularly polarized (CP) dielectric resonator antenna for WLAN and WiMAX applications is proposed. The dielectric resonator has an asymmetric Y-shaped geometry. By properly selecting the length of the arms, the pairs of fundamental (TE 111 ) and second-order (TE 211 ) are excited separately at the design frequencies to radiate the CP wave. The measurement shows that the fabricated antenna exhibits a wide impedance bandwidth for |S 11 | < -10 dB of 62.07% (2.2-4.18 GHz). The far-field measurements in the broadside direction demonstrated a dual-band CP response with 3 dB ARBWs of 4.92%(2.38-2.5 GHz) at the lower and 12.64% (3.26-3.70 GHz) at the upper band. The measured CP bands cover the entire frequency range of WLAN (2.401-2.495 GHz) and WiMAX (3.4-3.69 GHz) at the lower and upper bands, respectively.
本文提出了一种用于WLAN和WiMAX应用的新型双频圆极化介质谐振器天线。该介质谐振器具有不对称的Y形几何结构。通过适当选择臂的长度，在设计频率下分别激发基模（TE111）和二阶模（TE211）对，以辐射圆极化波。测量结果表明，所制作的天线在|S11| < -10 dB时具有62.07%（2.2 - 4.18 GHz）的宽阻抗带宽。在宽边方向的远场测量显示出双频圆极化响应，低频段3 dB轴比带宽为4.92%（2.38 - 2.5 GHz），高频段为12.64%（3.26 - 3.70 GHz）。测量得到的圆极化频段分别覆盖了WLAN（2.401 - 2.495 GHz）的整个低频范围和WiMAX（3.4 - 3.69 GHz）的整个高频范围。
