28 July 2000 IF amplifier stability for the heterodyne instrument for FIRST (HIFI)
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Abstract
The Heterodyne Instrument for FIRST (HIFI) is a heterodyne receiver system which has an intermediate frequency (IF) amplifier that will likely exhibit 1/f-type gain fluctuations. Although the level of fluctuation is very small, wideband spectral observations require exceptional stability. A methodology for measuring 1/f fluctuations is described along with measurements of two amplifiers. Comparisons are made with previous 1/f measurements of HEMT amplifiers. The implications for HIFI are described.
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Michael D. Seiffert, Michael D. Seiffert, Juan Daniel Gallego-Puyol, Juan Daniel Gallego-Puyol, Isaac Lopez Fernandez, Isaac Lopez Fernandez, Nick D. Whyborn, Nick D. Whyborn, John C. Pearson, John C. Pearson, } "IF amplifier stability for the heterodyne instrument for FIRST (HIFI)", Proc. SPIE 4013, UV, Optical, and IR Space Telescopes and Instruments, (28 July 2000); doi: 10.1117/12.393986; https://doi.org/10.1117/12.393986
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