Title :
A Broadband Low Reflection Electronically Variable PIN Diode-based Attenuator
Author :
Beyragh, Dawood Shekari ; Pahlevaninezhad, Hamid ; Motahari, Seyed Reza
Author_Institution :
Isfahan Univ. of Technol., Isfahan
Abstract :
In this paper, variable pi-type PIN diode-based attenuators are analyzed and the condition for the bias currents of the PIN diodes is extracted to achieve exact matching over the full range of attenuation. Then, a simple bias circuit is proposed based on the obtained condition to improve the input and output VSWR. The concept was demonstrated experimentally from 0.2 GHz to 2 GHz that shows a maximum input and output return loss of -15 dB at the worst conditions over the complete range of frequency and attenuation.
Keywords :
attenuators; p-i-n diodes; attenuator; bias circuit; broadband low reflection electronically variable PIN diode; Attenuation; Attenuators; Bandwidth; Circuits; Communications technology; Diodes; Insertion loss; Radio frequency; Reflection; Resistors; Attenuators; PIN diodes; broadband communication; impedance matching; variable attenuators;
Conference_Titel :
Ultra-Wideband, 2007. ICUWB 2007. IEEE International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-0521-3
Electronic_ISBN :
978-1-4244-0521-3
DOI :
10.1109/ICUWB.2007.4381053
