Radio astronomy ultra-low-noise amplifier for operation at 91 cm wavelength in high RFI environment

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• 作者：A. M. Korolev ; V. V. Zakharenko ; O. M. Ulyanov
• 关键词：Ultra ; low ; noise amplifier ; High ; electron ; mobility transistor ; Radio telescope ; Noise temperature
• 刊名：Experimental Astronomy
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：41
• 期：1-2
• 页码：215-221
• 全文大小：735 KB
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• 作者单位：A. M. Korolev (1)
  V. V. Zakharenko (1)
  O. M. Ulyanov (1)
  
  1. Institute of Radio Astronomy, NAS of Ukraine, Chervonopraporna St. 4, Kharkov, 61002, Ukraine
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Astronomy
  Statistics for Engineering, Physics, Computer Science, Chemistry and Geosciences
  
• 出版者：Springer Netherlands
• ISSN：1572-9508

文摘

An ultra-low-noise input amplifier intended for a use in a radio telescope operating at 91 cm wavelength is presented. The amplifier noise temperatures are 12.8 ± 1.5 and 10.0 ± 1.5 K at ambient temperatures of 293 and 263 K respectively. The amplifier does not require cryogenic cooling. It can be quickly put in operation thus shortening losses in the telescope observation time. High linearity of the amplifier (output power at 1 dB gain compression P_1dB ≥ 22 dBm, output third order intercept point OIP3 ≥ 37 dBm) enables the telescope operation in highly urbanized and industrialized regions. To obtain low noise characteristics along with high linearity, high-electron-mobility field-effect transistors were used in parallel in the circuit developed. The transistors used in the amplifier are cost-effective and commercially available. The circuit solution is recommended for similar devices working in ultra-high frequency band. Keywords Ultra-low-noise amplifier High-electron-mobility transistor Radio telescope Noise temperature