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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