Doppler Spread in Reverberation Chamber Predicted From Measurements During Step-Wise Stationary Stirring
Artikel i vetenskaplig tidskrift, 2010

We propose a simple method to accurately predict Doppler spread in a reverberation chamber (RC) by using frequency domain S-parameters measured with a vector network analyzer (VNA) at many fixed stirrer positions (step-wise stationary mode). Thus, the measurements are done under repeatable stationary conditions, so no Doppler shift is present during the actual measurements. Still, this letter shows that the measured S-parameters in step-wise stationary mode can be used to determine Doppler spread appearing during continuous movement of the stirrers. This can be done by computation for any stirrer speed by assuming that the fixed stirrer position steps are the time steps of a continuous movement of the stirrers, and by adding a virtual stirrer speed between the positions corresponding to the desired continuous movement of the stirrers. The computed Doppler spreads are validated over a large frequency band by measuring the time-varying S-parameters for a given stirrer speed.

Författare

Kristian Karlsson

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Antennsystem

Chen Xiaoming

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Antennsystem

Per-Simon Kildal

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Antennsystem

Jan Carlsson

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Antennsystem

IEEE Antennas and Wireless Propagation Letters

1536-1225 (ISSN)

Vol. 9 497 - 500 5473057

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1109/LAWP.2010.2051211