title: Smaller-loss planar SPP transmission line than conventional microstrip in microwave frequencies.
abstract: Transmission line is a basic component in all passive devices, integrated circuits, and systems. Microstrip is the most popular transmission line in the microwave and millimeter-wave frequencies, and has been widely used in current electronic devices, circuits, and systems. One of the important issues to be solved in such applications is the relatively large transmission loss of microstrip. Here, we propose a method to reduce the loss of microwave transmission line based on the designable wavenumber of spoof surface plasmon polaritons (SPPs). Using this characteristic, we analyze and experimentally demonstrate the low-loss feature of the SPP transmission line through the perturbation method and S-parameter measurements, respectively. Both simulation and experimental results show that the SPP transmission line has much smaller transmission loss than traditional microstrip with the same size in the microwave frequencies. Hence, the spoof SPP transmission line may make a big step forward in the low-loss circuits and systems.
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.|Synergetic Innovation Center of Wireless Communication Technology, Southeast University, Nanjing 210096, China.
authors.forename: Hao Chi
authors.initials: HC
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.|Synergetic Innovation Center of Wireless Communication Technology, Southeast University, Nanjing 210096, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.|Synergetic Innovation Center of Wireless Communication Technology, Southeast University, Nanjing 210096, China.
authors.forename: Jun Feng
authors.initials: JF
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.|Synergetic Innovation Center of Wireless Communication Technology, Southeast University, Nanjing 210096, China.
authors.forename: Wenxuan
authors.initials: W
authors.lastname: Tang
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.|Synergetic Innovation Center of Wireless Communication Technology, Southeast University, Nanjing 210096, China.
authors.forename: Yifeng
authors.initials: Y
authors.lastname: Fan
authors.affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.|Cooperative Innovation Centre of Terahertz Science, No.4, Section 2, North Jianshe Road, Chengdu 610054, China.
authors.forename: Tie Jun
authors.initials: TJ
authors.lastname: Cui