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A High-Order L-Band HTS Filter for Sensitive Detecting.
- Source :
- Journal of Superconductivity & Novel Magnetism; Sep2019, Vol. 32 Issue 9, p2849-2856, 8p
- Publication Year :
- 2019
-
Abstract
- In this paper, a new high-temperature superconducting (HTS)-based microwave radiometer with an improved sensitivity is presented. The cryogenic receiver front end consists of an HTS filter and a cryogenic low noise amplifier (LNA). The cryogenic receiver front end shows an ultra-low noise figure and can suppress radio frequency interference (RFI) effectively. The proposed HTS filter works at a center frequency of 1.4135 GHz with a bandwidth of 25 MHz. The measured mid-band insertion loss, side band steepness, and out-of-band attenuation of the HTS filter are 0.14 dB, 35 dB/MHz, and 80 dB, respectively. The noise figure of the cryogenic LNA is about 0.27 dB at a temperature of 77 K. Compared with other total power radiometers, the proposed radiometer has a lower receiver noise temperature, which can improve the sensitivity with a short integration time of the satellite-based salinity meter. In addition, since the bandwidth of the salinity meter is fixed and the integration time of satellite-based equipment is limited, such a low receiver noise temperature can increase the flexibility of future satellite payload configuration program. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15571939
- Volume :
- 32
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Journal of Superconductivity & Novel Magnetism
- Publication Type :
- Academic Journal
- Accession number :
- 138812263
- Full Text :
- https://doi.org/10.1007/s10948-019-5070-z