A Continuously Tunable Phase Shifter Using Surface Waves

IEEE Journal of Microwaves

Amirmasoud Ohadi¹  George V. Eleftheriades¹ 

[1] Department of Electrical and Computer Engineering, University of Toronto, Toronto, ON, Canada;

关键词: Phase shifters;    surface-waves;    impedance surfaces;    phased arrays;    varactors;   

DOI  :  10.1109/JMW.2021.3102869

来源: DOAJ

【 摘 要 】

In this paper we present the theory, design, and implementation of a continuously tunable phase shifter using a surface-wave structure. The surface-wave travels on a reconfigurable impedance surface which is implemented by arranging dipoles on a single-layer PCB where a varactor is placed in the gap in the middle of each dipole. The proposed phase shifter operates at X-band from 8.5 to 10 GHz and it can provide 464^o phase shift with a figure of merit of 110^o/dB at 9.16 GHz. In the designed phase shifter, the varactor loss is less than all other loss mechanisms which makes it possible to achieve a high figure of merit at a high frequency range. The proposed phase shifter can be used in the design of phased arrays that require a high radiation efficiency at a relatively high frequency compared to the self-resonance frequency of the tunable electronic components.

【 授权许可】

Unknown