Title :
Group delay and phase measurements at converters and multistage converters without LO access
Author_Institution :
Rohde & Schwarz, Munich, Germany
Abstract :
This paper describes a new technique that allows group delay and relative phase measurements of frequency converters and mixers that don´t have access to the local oscillator or the reference signal. In contrast to the methods offered by network analyzers in the past, the measurement accuracy of this technique is independent of the frequency and phase stability of the internal local oscillator of the DUT. The key of this new method is, that the DUT is stimulated with an nearly arbitrary two-tone signal. The phase difference between these two carriers is measured at the input and the output of the DUT to derive the group delay and the relative phase of the conversion loss of the DUT.
Keywords :
frequency convertors; mixers (circuits); network analysers; arbitrary two-tone signal; device under test; frequency converters; group delay measurement; internal local oscillator; mixers; multistage converters; phase difference; phase stability; relative phase measurements; Apertures; Delay; Frequency conversion; Frequency measurement; Local oscillators; Loss measurement; Mixers; Phase measurement; Scattering parameters; Time measurement; Group delay; converter; embedded LO; mixer; relative phase; two-tone technique;
Conference_Titel :
Microwaves, Communications, Antennas and Electronics Systems, 2009. COMCAS 2009. IEEE International Conference on
Conference_Location :
Tel Aviv
Print_ISBN :
978-1-4244-3985-0
DOI :
10.1109/COMCAS.2009.5386030