Abstract
Spoof/designer surface plasmon polaritons (SPP) and Goubau line belong to the same category of single-conductor surface waveguide. They feature easy integration and high field confinement capability, and hence are good candidates for wave guiding and radiating at terahertz frequencies. Here, we propose a momentum-reconfigurable Goubau meta-line radiator that is capable of digitally steering its beam at a fixed frequency, in contrast to conventional SPP or Goubau line radiators relying on changing frequencies to steer beams. By periodically loading switchable meta-lines with ON and OFF states along the Goubau line, the modulation period and hence the momentum of Goubau line radiators can be dynamically controlled. The proposed Goubau line radiator is able to steer the main beam at a given frequency by independently switching ON or OFF each unit cell. As a proof of concept, we use line connection and disconnection to mimic ON and OFF state of the switch, respectively. Several radiators, representing different switching coding combinations, are fabricated and experimentally validated. Although this momentum-reconfigurable Goubau meta-line radiator is demonstrated at microwave frequency, it can be easily extended to terahertz frequencies.
Highlights
Benefiting from their low-cost, light weight and simple fabrication features, the periodic radiators have found applications for large phased-array beam scanning used in microwave radar and communication systems
The ground planes are gradually tapered on both sides to convert smoothly the modes supported in 50 Ω transmission line and Goubau line
To realize a dynamic variation of the modulation period in Goubau line radiators, we propose an electronic approach using the switches, as illustrated in Fig. 3
Summary
Benefiting from their low-cost, light weight and simple fabrication features, the periodic radiators have found applications for large phased-array beam scanning used in microwave radar and communication systems. We propose a momentum-reconfigurable Goubau meta-line radiator that is capable of digitally steering its beam at a fixed frequency. The radiation leakage is produced by loading period-reconfigurable meta-lines all through the Goubau line By loading these meta-lines using ON or OFF state switches, we demonstrate theoretically and experimentally that a dynamic control over the momentum can be achieved. In this way, the main beam of the proposed radiator can steer continuously at a fixed frequency. The main beam of the proposed radiator can steer continuously at a fixed frequency This new concept of Goubau meta-line radiators using reconfigurable periodic modulations is experimentally demonstrated at microwave frequencies
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
