A Ku-band three-stage mmic low-noise amplifier with superiorly low thermal-sensitivity coefficients
✍ Scribed by Shu-Jenn Yu; Wei-Chou Hsu; Ching-Sung Lee; Chian-Sern Chang; Chang-Luen Wu; Ching-Hsueh Chang
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 228 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
A three‐stage monolithic microwave integrated‐circuit (MMIC) low‐noise amplifier (LNA) design with superiorly low thermal‐sensitivity coefficients in both the small‐signal gain and noise figure characteristics is reported. The amplifier is constituted by using the AlGaAs/GaAs pseudomorphic high electron mobility transistors (pHEMTs). It is suitable for the commercial applications at Ku‐band frequencies. Besides, a compact self‐biased structure with a single‐bias supply was employed to simplify the circuit and improve thermal stability. A noise figure of 2.3 dB with an associated gain of 22 dB is achieved at 16 GHz, and the output power, P~1~~dB~, is 17 dBm. The proposed LNA has demonstrated excellent thermal stability. The thermal‐sensitivity coefficients for the small‐signal gain and the noise figure are superiorly as low as 0.023 and 0.003 dB/°C, respectively, with respect to the temperature variation from −15 to 85°C. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1637–1641, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22543