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Compact passive and active tunable delay lines using complementary split-ring resonators
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Compact passive and active tunable delay lines using complementary split-ring resonators
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Journal Article
Compact passive and active tunable delay lines using complementary split-ring resonators
2013
Overview
A novel compact left-handed delay line using four-cell of complementary split-ring resonators (CSRRs) has been designed, fabricated and characterised. It is found that the cell separation of CSRRs has significant effects on time delay. To obtain maximum time delay, each cell separation must be individually tuned and optimised. The results show that cell separation optimisation can prolong the delay time from 0.6 to 6.08 ns, increased by more than 90%. Furthermore, varactor diodes were embedded in the delay line to provide tunability. It is verified experimentally that the delay time can be tuned from 0.08 to 5.6 ns by varying DC bias from 0 to −20 V. In addition, a new equivalent circuit model has been developed and verified both numerically and experimentally, to take into account of the magnetic coupling between the rings in the adjacent cells, which has been neglected so far in published works. The proposed analysis reveals that such magnetic coupling can be sometimes very strong and has significant effects on circuit performance.
Publisher
The Institution of Engineering and Technology,Institution of Engineering and Technology,The Institution of Engineering & Technology
Subject
/ cell separation optimisation
/ Circuits of signal characteristics conditioning (including delay circuits)
/ compact left‐handed delay line
/ compact passive tunable delay lines
/ complementary split‐ring resonators
/ Delay
/ Electric, optical and optoelectronic circuits
/ Exact sciences and technology
/ Joining
