The VSWR Considerations in Potentially Unstable Microwave Amplifiers Design in the CCITL System

Author

Silapunt, R. ; Torrungrueng, D.

Author_Institution

Dept. of Electron. & Telecommun., King Mongkut´´s Univ. of Technol., Bangkok

fYear

2007

fDate

11-14 Dec. 2007

Firstpage

1

Lastpage

4

Abstract

The voltage standing wave ratio (VSWR) in a design of potentially unstable microwave transistor amplifiers in the conjugately characteristic-impedance transmission line (CCITL) system using the T-chart is investigated. The design is carried out under constant operating power gain and maximum output stability and design parameters are computed using the characteristic conductance (CC) approach. Output VSWR values are approximately constant except for the slight increase at higher input VSWR values and argument Phi that is the argument of the CCITL characteristic impedances. Input matching networks are implemented at different input VSWR values using reciprocal CCITL single-stub shunt tuners.

Keywords

microwave amplifiers; microwave transistors; transistor circuits; transmission lines; T-chart; characteristic conductance approach; conjugately characteristic-impedance transmission line system; input matching networks; potentially unstable microwave amplifier design; single-stub shunt tuners; voltage standing wave ratio; Impedance matching; Microwave amplifiers; Microwave technology; Microwave transistors; Power amplifiers; Power transmission lines; Stability; Transmission line theory; Tuners; Voltage; CCITL; Characteristic conductance (CC) approach; T-chart; VSWR; operating power gain; potentially unstable; stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2007. APMC 2007. Asia-Pacific

Conference_Location

Bangkok

Print_ISBN

978-1-4244-0748-4

Electronic_ISBN

978-1-4244-0749-1

Type

conf

DOI

10.1109/APMC.2007.4554840

Filename

4554840