Advanced calibration and instrumentation setups for nonlinear RF-devices

Project Details

Description

One of the challenges in modulated measurements of nonlinear devices resides in the calibration of the measurement instrument's phase distortion for narrow band (a few% of the carrier frequency) signals with a large number of tones. Since many telecom applications rely on the use of narrow band modulated signals, it is mandatory to calibrate the phase distortion of the Large-Signal Network Analyser operating under narrow band modulated excitation. The current state-of-the-art for the calibration of waves composed of a carrier and its harmonics relies on the well-established step recovery diode (SRD) as a reference element that produces a repeatable periodic reference pulse train. This method cannot be used for spectra containing lines that do not lie on the harmonic grid (f0, 2f0...) with f0 the repetition frequency of the pulse train. As a consequence, we are not able to calibrate the spectral lines of a narrow band modulated signal with this method. In this research, the calibration is achieved by measuring a characterised signal, in analogy to the SRD method. However, the signal is now constructed such that a dense frequency grid is obtained.
AcronymFWOTM420
StatusFinished
Effective start/end date1/10/0723/01/11

Flemish discipline codes

  • Electrical and electronic engineering
  • (Bio)medical engineering

Keywords

  • Calibration
  • nonlinear systems
  • high frequency