A gigahertz-bandwidth vector signal generation and analysis system for traveling-wave tube amplifiers testing

Author

Qiu, J. ; Abe, D. ; Antonsen, T.M., Jr. ; Danly, G. ; Levush, B.

Author_Institution

Naval Res. Lab., Washington, DC, USA

fYear

2003

fDate

28-30 May 2003

Firstpage

56

Lastpage

57

Abstract

The calibration procedure for a vector signal system which has over 1.6 GHz of RF bandwidth is described. To achieve the desired bandwidth, two software filters (a prefilter and a postfilter) are used to correct the non-uniform frequency responses in the system. We describe techniques for obtaining the response functions of both the signal generator and the signal analyzer. The measured response functions are used to construct the filters to achieve the flat frequency response. Finally a 1-Gsymbol/s 32-QAM raised-cosine-filtered waveform is generated to demonstrate the application of the system.

Keywords

calibration; filtering theory; frequency response; quadrature amplitude modulation; travelling wave amplifiers; travelling wave tubes; waveform generators; 1.6 GHz; Gsymbol; calibration; cosine-filtered waveform; gigahertz-bandwidth vector signal generation; postfilter; prefilter; signal analyzer; signal generator; traveling-wave tube amplifiers testing; Bandwidth; Calibration; Filters; Frequency measurement; RF signals; Radio frequency; Radiofrequency amplifiers; Signal analysis; Signal generators; System testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics, 2003 4th IEEE International Conference on

Print_ISBN

0-7803-7699-4

Type

conf

DOI

10.1109/IVEC.2003.1286048

Filename

1286048