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1/f-Noise Analysis in Passive Millimeter Wave Imaging Front End Using Zero Biased Detector
Ist Teil von
Journal of infrared, millimeter and terahertz waves, 2015-12, Vol.36 (12), p.1176-1181
Ort / Verlag
New York: Springer US
Erscheinungsjahr
2015
Link zum Volltext
Quelle
2022 ECC(Springer)
Beschreibungen/Notizen
Noise equivalent temperature difference (NETD) is the critical parameter for passive imaging detection. A modelling of the sensitivity performance including the
f
-1
-type low flicker noise (1/
f
-noise) influence is presented, specifically investigated on the 1/
f
-noise to the sensitivity performance and the trade-offs between the low-noise amplifier (LNA)’s gain and the video frequency bandwidth. Measurement bench is set up, and results confirm that low-frequency modulation to the signal helps in improving the sensitivity performance. Based on the measurement results, it is concluded that signal power influences the 1/
f
-noise properties in detection diode. The amplifier’s output power is suggested to be lower than −30 dBm at least. This level is much lower than the point of P
1dB
(1 dB compressed point of the LNA).