The CDMA standard operating over the wireless environment along with various other
wireless standards places stringent specifications on the RF Front end. Due to possible
large interference signal tones at the receiver end along with the carrier, the Low Noise
Amplifier (LNA) is expected to provide high linearity, thus preventing the intermodulation
tones created by the interference signal from corrupting the carrier signal.
The research focuses on designing a novel LNA which achieves high linearity without
sacrificing any of its specifications of gain and Noise Figure (NF). The novel LNA
proposed achieves high linearity by canceling the IM3 tones in the main transistor in both
magnitude and phase using the IM3 tones generated by an auxiliary transistor. Extensive
Volterra series analysis using the harmonic input method has been performed to prove the
concept of third harmonic cancellation and a design methodology has been proposed. The
LNA has been designed to operate at 900MHz in TSMC 0.35um CMOS technology. The
LNA has been experimentally verified for its functionality. Linearity is usually measured
in terms of IIP3 and the LNA has an IIP3 of +21dBm, with a gain of 11 dB, NF of 3.1 dB
and power consumption of 22.5 mW.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/5928 |
| Date | 17 September 2007 |
| Creators | Ganesan, Sivakumar |
| Contributors | Sanchez-Sinencio, Edgar, Silva-Martinez, Jose |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Thesis, text |
| Format | 3293507 bytes, electronic, application/pdf, born digital |
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