An approach to ultra-wideband channel calibration using a vector network analyser

Abstract

approach to ultra-wideband channel calibration using a vector network analyser," Australian Journal of Electrical and Electronics Engineering, vol. 11, (4) pp. 347-356, 2014. An approach to ultra-wideband channel calibration using a vector network analyser AbstractIn this paper, two calibration methods are investigated to determine the most suitable approach for ultrawideband (UWB) communication channel measurements. The fi rst method is the through, open, short and match (TOSM) calibration technique. The second method is through, refl ection and load calibration technique. Presented experiment results show that the through, refl ection and load calibration process is more precise for calibration of coaxial cables and the UWB channel as clearly seen by increased magnitudes of the channel transfer function. It is also shown that the proposed through, refl ection and load technique leads to an improved larger measured root-mean-square value and that the measured magnitude transfer function of the wireless channel is increased by an absolute value of approximately 5 dB after calibration compared with results achieved when TOSM technique is used. In the paper, it is also shown that the time delay associated with test equipment of the UWB channel measurement can be equally well removed by using either the through, refl ection and load or TOSM calibration techniques. KeywordsVector network analyser, calibration kit, cables, indoor ultra-wideband channels Presented experiment results show that the TRL calibration process is more precise for calibration of coaxial cables and the UWB channel as clearly seen by increased magnitudes of the channel transfer function. It is also shown that the proposed TRL technique leads to an improved larger measured RMS value and that the measured magnitude transfer function of the wireless channel is increased by an absolute value of approximately 5 dB after calibration compared with results achieved when TOSM technique is used. In the paper, it is also shown that the time delay associated with test equipment of the UWB channel measurement can be equally well removed by using either the TRL or TOSM calibration techniques.

Measurement of Ultra Wideband Channel Sounding Using a Vector Network Analyzer

“…In all measurements, TRL calibration was used to get accurate measurement results. Further details of this calibration procedure can be found in [40] For this study, the noise power of the device (VNA) has been measured at 10 kHz, 1 kHz and 10 Hz, as shown in Figure 16 where we can see that, decreasing the IF bandwidth, decreases the noise power. This leads to a corresponding increase in the time taken to measure the channel (as shown in Table 1 on sweep time).…”

Ultra Wideband Noise Channel Measurement using a Vector Network Analyzer

“…In all measurements, TRL calibration was used to get accurate measurement results. Further details of this calibration procedure can be found in [39].…”

Wideband THz communication channel measurements for 5G indoor wireless networks

“…Calibrating the VNA corrects these imperfections along with other defects in measurements. Several types of calibrations can be performed depending on the application of interest [6], [13], [14]. For channel modeling, through/reciprocal calibration is performed with direct interconnection of the module's waveguide.…”