Open Access
Design and Test of an L-Band (GNSS) Low Noise Amplifier and Limiter
Navneeta Deo,Master Thesis,Johan Wernehag,Joakim Thelberg,Jonas Larsson,Pietro Andreani,Robert Petersson +6 more
TLDR
In this paper, a low-noise amplifier for GNSS applications is proposed, which is powered by a single positive supply of +5 V and has very low DC power consumption of 15 mW.Abstract:
Abstract This thesis work was performed at RUAG Space AB, Goteborg, Sweden. The aim of this thesis is to test the performance boundaries of SiGe based heterojunction bipolar transistor in designing a low noise amplifier meant for GNSS applications. After careful consideration of different alternatives for active components in SiGe HBT process, BFY640-04 from Infineon was selected as the active component for the design. Later, different topologies have been evaluated in Advanced Design System (ADS) software and finally a common emitter topology is selected considering cost-effectiveness, performance and simplicity. Apart from this, the functionality of a limiter component namely, GG-77015-01 from Microsemi has been tested by placing it in front of the LNA. The purpose of this is to know if it can prevent the LNA from high power levels and to study its overall effect on noise figure, gain and linearity. The prototypes were fabricated on a hardback PCB consisting of Roger Duroid 6002 substrate. The designed LNA has less than 1 dB (excluding limiter) noise figure, gain of 17-13 dB and input return loss of 6 dB. It is powered by a single positive supply of +5 V and has very low DC power consumption of 15 mW. Also, the noise figure is fairly low in the entire L-band apart from current GNSS bands, which provides possibility of this design to be useful in future GNSS applications too. (Less)read more
Citations
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Journal ArticleDOI
Design of 2.4 GHz Low Noise Amplifiers for Wireless Communication System
Nataraj. B,Arthi. G,Deepa. D +2 more
TL;DR: Advanced design system (ADS) tool was used for design and simulation of LNA and performance of different design is compared with respective noise figure, gain, input and output reflection coefficient.
References
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Book
Microwave Transistor Amplifiers: Analysis and Design
TL;DR: In this article, the authors derived the Input and Output Stability Circles and the Unilateral Constant-Gain Circles from two-port Matching Networks and Signal Flow Graphs.
Proceedings ArticleDOI
The S-probe-a new, cost-effective, 4-gamma method for evaluating multi-stage amplifier stability
TL;DR: A generalized, automated, noninvasive, 4-gamma technique for stability analysis of multistage active circuits that can detect special cases of instability involving active terminations, often missed using conventional stability analysis approaches.
Journal ArticleDOI
Designing FET's for broad noise circles
TL;DR: In this article, it was shown that the key to broader noise circles are a lower minimum noise figure and a small optimum generator reflector coefficient, and an expression was derived showing that the optimum gate width is inversely proportional to frequency.