Ashraf Muhammad A, Jamil Khalid, Telba Ahmed, Alzabidi Mohammed A, Sebak Abdel Razik
Department of Electrical Engineering, King Saud University, Riyadh 11421, Saudi Arabia.
Prince Sultan Defense Studies and Research Center (PSDSARC), Riyadh 13322, Saudi Arabia.
Micromachines (Basel). 2020 Oct 30;11(11):975. doi: 10.3390/mi11110975.
In this paper, a novel concept on the design of a broadband printed Yagi antenna for S-band wireless communication applications is presented. The proposed antenna exhibits a wide bandwidth (more than 48% fractional bandwidth) operating in the frequency range 2.6 GHz-4.3 GHz. This is achieved by employing an elliptically shaped coupled-directive element, which is wider compared with other elements. Compared with the conventional printed Yagi design, the tightly coupled directive element is placed very close (0.019λ to 0.0299λ) to the microstrip-fed dipole arms. The gain performance is enhanced by placing four additional elliptically shaped directive elements towards the electromagnetic field's direction of propagation. The overall size of the proposed antenna is 60 mm × 140 mm × 1.6 mm. The proposed antenna is fabricated and its characteristics, such as reflection coefficient, radiation pattern, and gain, are compared with simulation results. Excellent agreement between measured and simulation results is observed.
本文提出了一种用于S波段无线通信应用的宽带印刷八木天线设计的新颖概念。所提出的天线在2.6 GHz至4.3 GHz频率范围内展现出宽带宽（分数带宽超过48%）。这是通过采用椭圆形耦合定向单元实现的，该单元比其他单元更宽。与传统印刷八木天线设计相比，紧密耦合定向单元放置得非常靠近微带馈电偶极臂（距离为0.019λ至0.0299λ）。通过在电磁场传播方向上放置另外四个椭圆形定向单元，增益性能得到了增强。所提出天线的整体尺寸为60 mm×140 mm×1.6 mm。制作了所提出的天线，并将其诸如反射系数、辐射方向图和增益等特性与仿真结果进行了比较。观察到测量结果与仿真结果之间具有良好的一致性。
