학술논문
Low-noise receiver for microwave ozone measurements.
Document Type
Article
Source
Subject
*SUPERHETERODYNE receivers
*NOISE
*MICROWAVES
*SCHOTTKY barrier diodes
*STRATOSPHERE
*MESOSPHERE
*GAUSSIAN beams
*TEMPERATURE effect
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Language
ISSN
0033-8443
Abstract
We describe a low-noise superheterodyne receiver with a Schottky-diode for a new mobile microwave ozonometer operated at a frequency of 142.2 GHz, which is designed to measure the vertical profile of ozone distribution in the stratosphere and mesosphere. Calculated and experimental characteristics of the input quasioptical units of the receiver at the Gaussian beams and the measurement results for the directional pattern of the receiver antenna and the noise temperature of the receiver are presented. [ABSTRACT FROM AUTHOR]