Fast Parametric Modeling of Radio Astronomy Reflector Antenna Noise Temperature
نویسندگان
چکیده
منابع مشابه
Simple nonlinearity evaluation and modeling of low-noise amplifiers with application to radio astronomy receivers.
This paper describes a comparative nonlinear analysis of low-noise amplifiers (LNAs) under different stimuli for use in astronomical applications. Wide-band Gaussian-noise input signals, together with the high values of gain required, make that figures of merit, such as the 1 dB compression (1 dBc) point of amplifiers, become crucial in the design process of radiometric receivers in order to gu...
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Two packaged low noise amplifiers for the 0.3-4 GHz frequency range are described. The amplifiers can be operated at temperatures of 300-4 K and achieve noise temperatures in the 5 K range (<0.1 dB noise figure) at 15 K physical temperature. One amplifier utilizes commercially available, plastic-packaged SiGe transistors for first and second stages; the second amplifier is identical except it u...
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ژورنال
عنوان ژورنال: IEEE Transactions on Antennas and Propagation
سال: 2016
ISSN: 0018-926X,1558-2221
DOI: 10.1109/tap.2016.2543801