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- Title
Design and Analysis of a Continuously Tunable Low Noise Amplifier for Software Defined Radio.
- Authors
Aneja, Aayush; Li, Xue Jun
- Abstract
This paper presents the design and analysis of a continuously tunable low noise amplifier (LNA) with an operating frequency from 2.2 GHz to 2.8 GHz. Continuous tuning is achieved through a radio frequency impedance transformer network in the input matching stage. The proposed circuit consists of four stages, namely transformer stage, tuning stage, phase shifter and gain stage. Frequency tuning is controlled by varying output current through bias voltage of tuning stage. The circuit includes an active phase shifter in the feedback path of amplifier to shift the phase of the amplified signal. Phase shift is required to further achieve tunability through transformer. The LNA achieves a maximum simulated gain of 18 dB. The LNA attains a perfect impedance match across the tuning range with stable operation. In addition, it achieves a minimum noise figure of 1.4 dB.
- Subjects
LOW noise amplifiers; SOFTWARE radio; ELECTRIC transformers; PHASE shifters; SIGNAL processing
- Publication
Sensors (14248220), 2019, Vol 19, Issue 6, p1273
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s19061273