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

fYear

2006

fDate

10-15 Sept. 2006

Firstpage

1501

Lastpage

1504

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2006. 36th European

Conference_Location

Manchester

Print_ISBN

2-9600551-6-0

Type

conf

DOI

10.1109/EUMC.2006.281344

Filename

4058124