Title :
A delay line discriminator for IFM using a left-handed delay line
Author :
Mulagada, Raghu ; Weldon, Thomas P.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of North Carolina at Charlotte, Charlotte, NC, USA
Abstract :
Recent developments in left-handed metamaterials and left-handed transmission lines have led to new approaches to the design of radio frequency components such as branch line couplers. In this paper, the design of a delay line discriminator for instantaneous frequency measurement (IFM) is investigated, where the delay line section is replaced by a composite right/left-hand (CRLH) transmission line. To demonstrate the CRLH design approach, experimental measurements and simulation results are compared for a 100 MHz delay line discriminator. The inherent phase advance of the CRLH transmission line structure is shown to reverse the slope of the frequency discriminator when compared to a right-handed transmission line structure.
Keywords :
delay lines; discriminators; frequency measurement; metamaterials; transmission lines; CRLH design; CRLH transmission line structure; branch line coupler; composite right/left-hand transmission line; delay line discriminator; delay line section; frequency 100 MHz; instantaneous frequency measurement; left-handed delay line; left-handed metamaterial; radio frequency component; Bandwidth; Capacitors; Delay lines; Distributed parameter circuits; Frequency measurement; Inductors; Metamaterials; Periodic structures; Transmission line measurements; Transmission line theory;
Conference_Titel :
IEEE SoutheastCon 2010 (SoutheastCon), Proceedings of the
Conference_Location :
Concord, NC
Print_ISBN :
978-1-4244-5854-7
DOI :
10.1109/SECON.2010.5453893
