L-band radiometer design for long-term stability measurement of one-port devices
Published online by Cambridge University Press: 14 December 2011
Abstract
The design of a high-stability radiometer is presented in this paper. It is used to characterize the stability of a microwave active cold load at L-band. The two-load radiometer takes advantage of a noise injection technique to improve its sensitivity. A temperature-stabilized enclosure is used to minimize gain and noise temperature fluctuations of the receiver. The radiometer sensitivity is 0.031 K and the gain fluctuations are less than 0.005 dB during 1 day. The total gain and the receiver noise temperature of the radiometer exhibit very small variations (<0.03 dB and 1 K, respectively) on the long term.
Keywords
- Type
- Research Papers
- Information
- International Journal of Microwave and Wireless Technologies , Volume 4 , Special Issue 1: IJMWT Special Issue on the 2011 National Microwave Days in France , February 2012 , pp. 119 - 126
- Copyright
- Copyright © Cambridge University Press and the European Microwave Association 2011
References
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