Title :
Time-constant control analysis of microwave differentiators
Author :
Tsai, Lin-Chuan ; Wu, Y.-T.
Author_Institution :
Dept. of Electron. Eng., Lunghwa Univ. of Sci. & Technol., Taoyuan, Taiwan
fDate :
10/1/2009 12:00:00 AM
Abstract :
A model describing the time constant of a wide-band microwave differentiator is presented. The time constant combined with the amplitude response dictates the circuit behaviour of a microwave differentiator. By representing the formulations of differentiators in the discrete-time (or Z) domain, the authors implement the differentiators with equal-length transmission lines. The approach method consists of discrete signal processing techniques, transfer functions in the Z domain and optimisation algorithms. Three differentiators with different time constants and frequency bands are built and tested. The experimental results are in good agreement with theoretical values.
Keywords :
microwave devices; optimisation; transfer functions; transmission lines; Z domain algorithms; amplitude response; circuit behaviour; discrete signal processing techniques; discrete-time domain; equal-length transmission lines; optimisation algorithms; time-constant control analysis; transfer functions; wide-band microwave differentiator;
Journal_Title :
Microwaves, Antennas & Propagation, IET
DOI :
10.1049/iet-map.2008.0262