TY - GEN
T1 - A low-noise time-domain EMI measurement system for measurements up to 26 GHz
AU - Hoffmann, Christian
AU - Böge, Alexander
AU - Russer, Peter
PY - 2011
Y1 - 2011
N2 - In this paper, a low-noise time-domain EMI measurement system for the frequency range from 9 kHz-26 GHz is presented. It combines ultra-fast analog-to-digital-conversion and real-time digital signal processing on a field-programmable-gate-array (FPGA) with ultra-broadband multi-stage down-conversion. By using low-loss components, the system noise floor power spectral density is decreased to below -150 dBm/Hz, yielding an ultra-low noise floor of typically below -115 dBm with a 9 kHz IF-filter. The high system sensitivity allows for the characterization of broadband, low-level signals near the noise floor, like ultra-wideband (UWB) communication. Defected ground structures increase the return loss of the low insertion loss SP5T PIN-diode switches. The system IF dynamic range exceeds the requirements of CISPR 16-1-1 by over 20 dB and allows for the measurement of high-dynamic range signals like radar pulses. Scan time is decreased by several orders of magnitude. A scan from 9 kHz to 26 GHz with a 9 kHz IF-filter bandwidth is completed in under 200 s, while over 5·106 frequency points are calculated.
AB - In this paper, a low-noise time-domain EMI measurement system for the frequency range from 9 kHz-26 GHz is presented. It combines ultra-fast analog-to-digital-conversion and real-time digital signal processing on a field-programmable-gate-array (FPGA) with ultra-broadband multi-stage down-conversion. By using low-loss components, the system noise floor power spectral density is decreased to below -150 dBm/Hz, yielding an ultra-low noise floor of typically below -115 dBm with a 9 kHz IF-filter. The high system sensitivity allows for the characterization of broadband, low-level signals near the noise floor, like ultra-wideband (UWB) communication. Defected ground structures increase the return loss of the low insertion loss SP5T PIN-diode switches. The system IF dynamic range exceeds the requirements of CISPR 16-1-1 by over 20 dB and allows for the measurement of high-dynamic range signals like radar pulses. Scan time is decreased by several orders of magnitude. A scan from 9 kHz to 26 GHz with a 9 kHz IF-filter bandwidth is completed in under 200 s, while over 5·106 frequency points are calculated.
UR - http://www.scopus.com/inward/record.url?scp=81255154095&partnerID=8YFLogxK
U2 - 10.1109/URSIGASS.2011.6050731
DO - 10.1109/URSIGASS.2011.6050731
M3 - Conference contribution
AN - SCOPUS:81255154095
SN - 9781424451173
T3 - 2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011
BT - 2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011
T2 - 2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011
Y2 - 13 August 2011 through 20 August 2011
ER -