[4] RYU S R,VARDHAN H,BANERJEE B,et al.Continuous active phase shifter design and analysis for millimeter-wave circuits［J］.IEEE Transactions on Circuits & Systems II Express Briefs,2013,60(10):627-631.

[5] JOST M,STRUNCK S,HEUNISCH A,et al.Continuously tuneable liquid crystal based stripline phase shifter realised in LTCC technology［C］// Paris,France:Microwave Conference,IEEE,2015.

[6] ABDELLATIF A S.Low loss,wideband,and compact CPW-based phase shifter for millimeter-wave applications［J］.IEEE Transactions on Microwave Theory & Techniques,2014,62(12):3403-3413.

[7] CHICHERIN D,STERNER M,LIOUBTCHENKO D,et al.Analog-type millimeter-wave phase shifters based on MEMS tunable high-impedance surface and dielectric rod waveguide［J］.International Journal of Microwave and Wireless Technologies,2011,3(5):533-538.

[8] SHAMONIN M,SHAMONINA E,KALININ V,et al.Resonant frequencies of a split-ring resonator: Analytical solutions and numerical simulations［J］.Microwave and Optical Technology Letters,2005,44(2):133-136.