In this paper, we present a broadband quasi-Yagi antenna. Good impedance matching is obtained by using parasitic elements. The antenna has been designed and successfully measured. Experimental results show that the 10...In this paper, we present a broadband quasi-Yagi antenna. Good impedance matching is obtained by using parasitic elements. The antenna has been designed and successfully measured. Experimental results show that the 10 dB return loss bandwidth of this antenna is 50% operating from 2.3 GHz to 3.8 GHz. We obtain very flat gain (around 5 dB) over the entire bandwidth. For the design and optimization of antennas, we use HFSS CAD software from ANSOFT.展开更多
A novel differential quasi-Yagi antenna is first presented and compared with a normal single-ended counterpart.The simulated and measured results show that the differential quasi-Yagi antenna outperforms the conventio...A novel differential quasi-Yagi antenna is first presented and compared with a normal single-ended counterpart.The simulated and measured results show that the differential quasi-Yagi antenna outperforms the conventional single-ended one.The differential quasi-Yagi antenna is then used as an element for linear arrays.A study of the coupling mechanism between the two differential and the two singleended quasi-Yagi antennas is conducted,which reveals that the TE0 mode is the dominant mode,and the driver is the decisive part to account for the mutual coupling.Next,the effects of four decoupling structures are respectively evaluated between the two differential quasi-Yagi antennas.Finally,the arrays with simple but effective decoupling structures are fabricated and measured.The measured results demonstrate that the simple slit or air-hole decoupling structure can reduce the coupling level from−18 dB to−25 dB and meanwhile maintain the impedance matching and radiation patterns of the array over the broad bandwidth.The differential quasi-Yagi antenna should be a promising antenna candidate for many applications.展开更多
依据八木天线的高增益特性,结合微带天线的相关技术,设计了一款工作在S波段的1×2宽带高增益微带准八木天线阵列。运用HFSS电磁仿真软件对设计的天线进行建模、仿真与优化,并进行了实物的加工与测试。分析及测试结果表明:所设计天线...依据八木天线的高增益特性,结合微带天线的相关技术,设计了一款工作在S波段的1×2宽带高增益微带准八木天线阵列。运用HFSS电磁仿真软件对设计的天线进行建模、仿真与优化,并进行了实物的加工与测试。分析及测试结果表明:所设计天线在2.2~3.2 GHz范围内S11均小于-10 d B,通带内最小增益为5 d Bi,最大增益达到10 d Bi,工作带宽达到50%以上,仿真分析结果与实测结果基本一致。展开更多
文摘In this paper, we present a broadband quasi-Yagi antenna. Good impedance matching is obtained by using parasitic elements. The antenna has been designed and successfully measured. Experimental results show that the 10 dB return loss bandwidth of this antenna is 50% operating from 2.3 GHz to 3.8 GHz. We obtain very flat gain (around 5 dB) over the entire bandwidth. For the design and optimization of antennas, we use HFSS CAD software from ANSOFT.
文摘A novel differential quasi-Yagi antenna is first presented and compared with a normal single-ended counterpart.The simulated and measured results show that the differential quasi-Yagi antenna outperforms the conventional single-ended one.The differential quasi-Yagi antenna is then used as an element for linear arrays.A study of the coupling mechanism between the two differential and the two singleended quasi-Yagi antennas is conducted,which reveals that the TE0 mode is the dominant mode,and the driver is the decisive part to account for the mutual coupling.Next,the effects of four decoupling structures are respectively evaluated between the two differential quasi-Yagi antennas.Finally,the arrays with simple but effective decoupling structures are fabricated and measured.The measured results demonstrate that the simple slit or air-hole decoupling structure can reduce the coupling level from−18 dB to−25 dB and meanwhile maintain the impedance matching and radiation patterns of the array over the broad bandwidth.The differential quasi-Yagi antenna should be a promising antenna candidate for many applications.
文摘依据八木天线的高增益特性,结合微带天线的相关技术,设计了一款工作在S波段的1×2宽带高增益微带准八木天线阵列。运用HFSS电磁仿真软件对设计的天线进行建模、仿真与优化,并进行了实物的加工与测试。分析及测试结果表明:所设计天线在2.2~3.2 GHz范围内S11均小于-10 d B,通带内最小增益为5 d Bi,最大增益达到10 d Bi,工作带宽达到50%以上,仿真分析结果与实测结果基本一致。
