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Low-noise correlation measurements based on software-defined-radio receivers and cooled microwave amplifiers.
- Source :
-
The Review of scientific instruments [Rev Sci Instrum] 2016 Nov; Vol. 87 (11), pp. 114706. - Publication Year :
- 2016
-
Abstract
- 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.
Details
- Language :
- English
- ISSN :
- 1089-7623
- Volume :
- 87
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- The Review of scientific instruments
- Publication Type :
- Academic Journal
- Accession number :
- 27910622
- Full Text :
- https://doi.org/10.1063/1.4966971