Low-noise correlation measurements based on software-defined-radio receivers and cooled microwave amplifiers

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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We present a microwave correlation measurement system based on two low-cost USB-connected software defined radio dongles modified to operate as coherent receivers by using a common local oscillator. Existing software is used to obtain I/Q samples from both dongles simultaneously at a software tunable frequency. To achieve low noise, we introduce an easy low-noise solution for cryogenic amplification at 600-900 MHz based on single discrete HEMT with 21 dB gain and 7 K noise temperature. In addition, we discuss the quantization effects in a digital correlation measurement and determination of optimal integration time by applying Allan deviation analysis.

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AlkuperäiskieliEnglanti
Artikkeli114706
Sivut1-5
JulkaisuReview of Scientific Instruments
Vuosikerta87
Numero11
TilaJulkaistu - 1 marraskuuta 2016
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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