Title :
A Variable Attenuator with Flat Group Delay Characteristics for PCS Applications
Author :
Park, Chan-Wang ; Kouki, Ammar B. ; Ghannouchi, Fadhel M. ; Allamando, Etienne A.
Author_Institution :
Institut d´´Electronique et Microélectronique du Nord, Département Hyperfréquences et Semiconducteurs, Université des Sciences et Technologies de Lille, Cité Scientifique, 59652, Villeneuve d´´Ascq, FRANCE. park@iemn.univ-Lille1.fr
Abstract :
A new reflective-type variable attenuator for PCS applications using a backward-wave quadrature hybrid and four PIN diodes is presented. The proposed configuration uses a single bias line for the four diodes with each two being separated by quarter wavelength transmission line. Simulation and experimental results show that an attenuation range of 14.3 dB with a maximum phase variation of 3° can easily be achieved. The attenuation and group delay exhibit good flatness with a variation of ±0.06 dB in attenuation and ±20 ps in group delay over a 100MHz bandwidth.
Keywords :
Application software; Attenuation; Attenuators; Bandwidth; Control systems; Delay; Diodes; Impedance; Personal communication networks; Transmission lines;
Conference_Titel :
Microwave Conference, 1998. 28th European
Conference_Location :
Amsterdam, Netherlands
DOI :
10.1109/EUMA.1998.338238
