The transmission and dispersive characteristics of slotline are calculated in this paper. The tail of Gaussion pulse is improved because a modified dispersive boundary condition (DBC) is adopted. It leads to a reduct...The transmission and dispersive characteristics of slotline are calculated in this paper. The tail of Gaussion pulse is improved because a modified dispersive boundary condition (DBC) is adopted. It leads to a reduction in computer memory requirements and computational time. The computational domain is greatly reduced to enable performance in personal computer. At the same time because edges of a boundary and summits are treated well, the computational results is more accurate and more collector.展开更多
A Ka-band wideband microstrip-to-microstrip(MS-to-MS)vialess vertical transition on slotline multimode resonator(MMR)is presented.The proposed transition mainly consists of a slotline MMR on the common ground plane,an...A Ka-band wideband microstrip-to-microstrip(MS-to-MS)vialess vertical transition on slotline multimode resonator(MMR)is presented.The proposed transition mainly consists of a slotline MMR on the common ground plane,and two microstrip(MS)lines facing each other at the top and third layers in the four-layered liquid crystal polymer(LCP)substrate.In order to improve the bandwidth of the proposed transition,a U-shaped branch is added to the top-and third-layer MS lines,separately.The slotline MMR can be properly excited by setting the position of the U-shaped branch line.As such,a three-pole wideband vertical transition is obtained,which shows a good transmission performance over a wide frequency range of 29.27-39.95 GHz.The three-pole wideband vertical transition based on multilayer LCP substrate is designed,fabricated,and measured.Test results indicate that a wide frequency range of 26.8436.26 GHz can be obtained with return loss better than-10dB and insertion loss less than-3dB.展开更多
A broadband feeding technique for the uniplanar tapered slot antenna (TSA) is presented. The TSA operates at a center frequency of 6.5 GHz with a 7 GHz bandwidth (107 percent). The antenna and feed are realized with a...A broadband feeding technique for the uniplanar tapered slot antenna (TSA) is presented. The TSA operates at a center frequency of 6.5 GHz with a 7 GHz bandwidth (107 percent). The antenna and feed are realized with a broadband microstrip-to-slotline transition on a low permittivity high frequency substrate, Rogers RT/Duroid 5880. The input impedance of the system is designed for 50 Ω compatibility with other system components, and the cross polarization is kept below –30 dB. The developed TSA system was simulated with commercially available electromagnetic software and manufactured. Measured results validate the design process and the antenna’s performance.展开更多
文摘The transmission and dispersive characteristics of slotline are calculated in this paper. The tail of Gaussion pulse is improved because a modified dispersive boundary condition (DBC) is adopted. It leads to a reduction in computer memory requirements and computational time. The computational domain is greatly reduced to enable performance in personal computer. At the same time because edges of a boundary and summits are treated well, the computational results is more accurate and more collector.
基金the Shaanxi Provincial Innovation Team Project(No.2020TD-019)the Xi'an Sciences Plan Project(No.2021XJZZ0075)。
文摘A Ka-band wideband microstrip-to-microstrip(MS-to-MS)vialess vertical transition on slotline multimode resonator(MMR)is presented.The proposed transition mainly consists of a slotline MMR on the common ground plane,and two microstrip(MS)lines facing each other at the top and third layers in the four-layered liquid crystal polymer(LCP)substrate.In order to improve the bandwidth of the proposed transition,a U-shaped branch is added to the top-and third-layer MS lines,separately.The slotline MMR can be properly excited by setting the position of the U-shaped branch line.As such,a three-pole wideband vertical transition is obtained,which shows a good transmission performance over a wide frequency range of 29.27-39.95 GHz.The three-pole wideband vertical transition based on multilayer LCP substrate is designed,fabricated,and measured.Test results indicate that a wide frequency range of 26.8436.26 GHz can be obtained with return loss better than-10dB and insertion loss less than-3dB.
文摘A broadband feeding technique for the uniplanar tapered slot antenna (TSA) is presented. The TSA operates at a center frequency of 6.5 GHz with a 7 GHz bandwidth (107 percent). The antenna and feed are realized with a broadband microstrip-to-slotline transition on a low permittivity high frequency substrate, Rogers RT/Duroid 5880. The input impedance of the system is designed for 50 Ω compatibility with other system components, and the cross polarization is kept below –30 dB. The developed TSA system was simulated with commercially available electromagnetic software and manufactured. Measured results validate the design process and the antenna’s performance.
