Abstract
A high-efficiency reconfigurable element for dynamic metasurface antennas (DMA), consisting of a complimentary electric-LC (CELC) resonator fed through the cavity from a waveguide slot, is proposed in this paper, with positive- intrinsic-negative (PIN) diodes loaded to realize the coding performance. To begin with, the low efficiency problem of a traditional CELC element is demonstrated before the introduction of the proposed element. Subsequently, an equivalent circuit is illustrated to analyse the resonant performance, with extensive parametric study for verification. The proposed element has a low ohmic loss when the diode is switched on, 25 times less than the traditional element. Furthermore, the radiation efficiency of a DMA with 10 proposed elements is compared with a traditional design, showing a significant efficiency improvement from 25% to 75% when half diodes are switched on. Finally, measurements are conducted to verify the feasibility of the dynamic element to achieve radiation ON and OFF states, showing a 12 dB radiation gain difference between two states.
Highlights
Metasurfaces,with planar structure, can modulate the electromagnetic wave in unprecedented manners, which has attracted much attention from the academic and the industrial communities [1], [2]
The proposed element is comprised of two parts which are installed by the plastic screws
While at diode-ON state the element is at radiation-OFF state and it works as a transmission line, the transmission loss is low as shown in Fig.19 (a)
Summary
Metasurfaces,with planar structure, can modulate the electromagnetic wave in unprecedented manners, which has attracted much attention from the academic and the industrial communities [1], [2]. LOW EFFICIENCY PROBLEM To realize dynamic radiation pattern, the element in DMA should have a significant power difference between radiation ON and OFF states, as shown in Fig.1, which had been achieved in the traditional DMA element.
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.
