Title :
Experimental Demonstration and Characterization of a Tunable CRLH Delay Line System for Impulse/Continuous Wave
Author :
Abielmona, Samer ; Gupta, Shulabh ; Caloz, Christophe
Author_Institution :
Ecole Poly-Tech. de Montreal, Montreal
Abstract :
A new tunable delay system is presented and demonstrated experimentally in this letter. This system, which incorporates a composite right/left-handed (CRLH) transmission line, two mixers, and a low-pass filter, achieves a tunable group delay for impulse and continuous-wave signals, controlled by a local oscillator. This group delay tunability follows from the dispersion property of the CRLH transmission line and is achieved without suffering from the drawbacks of conventional delay lines in terms of matching, frequency of operation, and planar circuit implementation. The realized prototype exhibits measured group delays tunable between 5.1 and 8.54 ns over a frequency range of 2-4.5 GHz.
Keywords :
circuit tuning; delay circuits; delay lines; low-pass filters; transmission lines; composite right-left-handed transmission line; continuous-wave signals; frequency 2 GHz to 4.5 GHz; impulse signal; low-pass filter; time 5.1 ns to 8.54 ns; tunable CRLH delay line system; tunable delay system; Control systems; Delay lines; Delay systems; Distributed parameter circuits; Frequency; Local oscillators; Low pass filters; Planar transmission lines; Transmission lines; Tunable circuits and devices; Composite right/left-handed (CRLH); continuous wave (CW); delay line; group delay; impulse; tunable;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2007.910492
