An 8-20-GHz wide-band LNA design and the analysis of its input matching mechanism

Shu-I Hu*

*Corresponding author for this work

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

In this letter, a wide-band low-noise amplifier (LNA) design is presented with -10 dB input reflection coefficient and - 100-K noise temperature over the 8-20-GHz frequency range at room temperature. This LNA can be cooled down in a liquid Helium cryostat to have 10-K noise temperature for the purpose of radio-astronomy application. To achieve its wide-band characteristics, a novel input matching mechanism is proposed, which combines the high-frequency inductive feedback and the low-frequency capacitive feedback. The recognition and comprehensive interpretation of this new input matching mechanism is crucial for future development of ultra-wide-band LNAs.

Original languageEnglish
Pages (from-to)528-530
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume14
Issue number11
DOIs
StatePublished - 1 Nov 2004

Keywords

  • Input matching
  • Low-noise amplifier (LNA)
  • Wide-band

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