Tunable band-notched CPW-Fed UWB monopole antenna using capacitively loaded microstrip resonator for cognitive radio applications
Tunable band-notched CPW-Fed UWB monopole antenna using capacitively loaded microstrip resonator for cognitive radio applications
复制标题
DOI：
10.2528/pierc16010501
复制
发表时间：
2016
影响因子：
--
通讯作者：
H. Atallah;A. Abdel-Rahman;K. Yoshitomi;R. Pokharel
中科院分区：
文献类型：
--
作者：
H. Atallah;A. Abdel-Rahman;K. Yoshitomi;R. Pokharel
本文提出了一种新型的用于认知无线电（CR）系统的小型共面波导（CPW）超宽带（UWB）天线。所提出的天线利用一个矩形微带谐振器在底层创建一个单一的陷波带，并实现可调谐性和小型化，使用变容二极管。陷波带的中心频率可以通过改变微带谐振器的有效电长度来电子调谐，这是通过在谐振器边缘采用两个变容二极管来实现的。此外，变容二极管的简单偏置对天线性能的影响很小。实验结果表明，所提出的天线可以选择性地在从4.77到6.21 GHz的约1.44 GHz的连续工作频带上具有频带陷波，以防止对在该频带中工作的主要用户的干扰，例如WLAN（5.15-5.35 GHz; 5.725-5.825 GHz）和WiMAX（5.25- 5.825 GHz）。模拟结果与实测数据吻合较好。
In this paper, a new compact coplanar waveguide (CPW) ultrawideband (UWB) antenna with an electronically tunable notched band is proposed for an overlay onto cognitive radio (CR) systems. The proposed antenna utilized a rectangular microstrip resonator in the bottom layer to create a single notched band and to realize tunability and miniaturization using varactors. The center frequency of the notched band can be electronically tuned by changing the effective electrical length of the microstrip resonator, which is achieved by employing two varactor diodes at the resonator edges. Moreover, the simple biasing of the varactor diodes has a small effect on the antenna performance. Experimental results show that the proposed antenna can selectively have a band notch over a continuous operating band about 1.44 GHz from 4.77 to 6.21 GHz to prevent the interference to the primary users that are operating in this band such as the WLAN (5.15-5.35 GHz; 5.725-5.825 GHz) and the WiMAX (5.25- 5.825 GHz). Good agreement is found between the simulated and the measured data.