Abstract
We have developed a SiGe HBT low-noise amplifier (LNA) for ultra-wideband (UWB) systems. We reduced the noise figure (NF) over the frequency range from 3.1 to 10.6 GHz (the FCC-specified UWB range) by using a novel LNA structure with an inductor-terminated, common-base input stage in front of a resistive-feedback amplifier. The circuit topology simultaneously enables increased gain for the input stage and wideband noise matching. On-chip measurement using microwave probes has shown that the LNA - fabricated using commercially available 0.25-μm SOI SiGe BiCMOS technology provides a wide 3-dB bandwidth of 14.5 GHz, an S21 of 22 dB, and a low noise figure ranging from 2.7 dB to 3.9 dB, along with low power consumption of 13.2 mW. Deviation of the S21 group delay is kept within 25 ps to ensure faithful signal amplification. The LNA occupies a chip area of 0.49 mm2.
Original language | English |
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Article number | RMO1B-3 |
Pages (from-to) | 39-42 |
Number of pages | 4 |
Journal | Digest of papers - IEEE Radio Frequency Integrated Circuits Symposium |
Publication status | Published - 2005 Nov 15 |
Externally published | Yes |
Event | 2005 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium - Digest of Papers - Long Beach, CA, United States Duration: 2005 Jun 12 → 2005 Jun 14 |
Keywords
- Low noise amplifier
- SiGe HBT
- Ultra-wideband
ASJC Scopus subject areas
- Engineering(all)