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Compact, tunable large group delay line
Author(s) -
Tang Wenjia,
Kim Hongjoon
Publication year - 2009
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.24747
Subject(s) - microwave , transmission line , return loss , line (geometry) , group delay and phase delay , electrical engineering , voltage , biasing , optoelectronics , materials science , electric power transmission , physics , electronic engineering , telecommunications , engineering , mathematics , geometry , filter (signal processing) , antenna (radio)
In this paper, we present a compact, tunable delay line based on left‐handed nonlinear transmission line (LH NLTL). The widely tunable range of the large group delay is achieved by controlling a reverse bias voltage of series varactors in the LH NLTL. The proposed tunable delay line can be made in a very compact form because its size is dominated by the cascaded varactors. Our experiment shows that the fabricated prototype exhibits tunable group delay between 1.2 and 2.2 ns at a frequency of 1.42 GHz and good return loss. The circuit size is merely 1.6 cm in length. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2893–2895, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24747