Title :
Effective Bandwidth Improvement Technique Based On Mismatch Analysis
Author :
Aja, Beatriz ; Artal, Eduardo ; De La Fuente, M. Luisa ; Pascual, Juan P.
Author_Institution :
Dipt. Ingenieria de Comunicaciones, Univ. de Cantabria, Santander
Abstract :
The mismatch in cascaded two ports is a common cause of ripple increase and bandwidth reduction in broadband systems. A new mismatch factor, D, is defined to deal with the individual S21 and global S21 parameters in a cascaded network. The relationship between this D factor and the effective bandwidth is presented. This bandwidth can be improved inserting a matched attenuator. The method has been applied to a Q band broadband amplifier, based on two cascaded multistage MMIC amplifiers, used in a radiometer for a space application. Effective bandwidth has been improved inserting a series thin film resistor attenuator. The design expressions and criteria of such microstrip attenuators are described
Keywords :
MMIC amplifiers; cascade networks; waveguide attenuators; wideband amplifiers; Q band broadband amplifier; broadband amplifiers; cascaded multistage MMIC amplifiers; cascaded network; effective bandwidth improvement technique; matched attenuator; microstrip attenuators; millimeter wave attenuators; millimeter wave radiometry; mismatch analysis; mismatch factor; radiometer; series thin film resistor attenuator; space application; Acoustic reflection; Attenuators; Bandwidth; Broadband amplifiers; MMICs; Microstrip; Microwave radiometry; Millimeter wave technology; Programmable logic arrays; Transducers; Broadband amplifiers; MIMICs; millimeter wave attenuators; millimeter wave radiometry;
Conference_Titel :
Microwave Conference, 2006. 36th European
Conference_Location :
Manchester
Print_ISBN :
2-9600551-6-0
DOI :
10.1109/EUMC.2006.281344
