Design of an S-band Ultra-low-noise Amplifier with Frequency Band Switching Capability

Shakibmehr, M.; Lotfizad, M.

doi:10.22061/jecei.2017.624

Document Type : Original Research Paper

Authors

Department of electrical Engineering, Damavand Branch,Islamic Azad University, Damavand, Iran

https://doi.org/10.22061/jecei.2017.624

Abstract

In this paper, an ultra-low-noise amplifier with frequency band switching capability is designed, simulated and fabricated. The two frequency ranges of this amplifier consist of the 2.4 to 2.5 GHz and 3.1 GHz to 3.15 GHz frequency bands. The designed amplifier has a noise figure of less than 1dB, a minimum gain of 23 dB and a VSWR of less than 2 in the whole frequency band. The design process starts with increasing the stability factor in the source through manipulating the inductor placement technique. Then the input and output matching circuits for the first frequency band are designed. This process is completed by utilizing two similar stages placed successively in order to achieve the desired gain level. Since no degradation of the noise figure is observed and acceptable values are also obtained for other parameters, switching the elements in the output matching circuit can be a good idea for avoiding the use of a similar circuit for the second frequency band. The optimum secondary values for the mentioned elements are obtained through the analyses performed using the ADS software. For changing the values of the mentioned elements two MOSFETs are used for adding capacitance and inductance to the matching circuit. In the next step, the designed amplifier is finalized and optimized after adding a suitable bias circuit to it. Moreover, The designed amplifier is fabricated and a good agreement between the measurement, analysis, and simulation results is observed.

Graphical Abstract

Keywords

20.1001.1.23223952.2017.5.1.3.1

References

[1] G. Gonzalez, Microwave transistor amplifiers: Analysis and design, Prentice-Hall, 1996, USA.[2] R. Panchal and H. Gupta, “Design and simulation of low noise amplifier at 2.3 GHz frequency for 4G technology,” International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, vol.4, no. 6, June 2015.

[3] Y. Taryana, “Design of two stage low noise amplifier using double stub matching network,” in Proc. IEEE International Conference on Aerospace Electronics and Remote Sensing Technology, Bali, Indonesia, 2015.

[4] H. Eslahi, A. Jalali, S. Nateghi, and J. Mazloum, “A reconfigurable LNA with single switched input matching network for S-band (WiMAX/WLAN) applications,” Microelectronics Journal, vol. 46, no. 10, pp. 956-962, 2015.

[5] Agilent(avago)’s ATF-34143 LNA datasheet .

[6] P. Bishoyi and S. S. Karthikeyan, “Design of a two stage Ku band low noise amplifier for satellite applications,” in Proc. IEEE ICCSP conf., Melmaruvathur, India , 2015.

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Journal of Electrical and Computer Engineering Innovations (JECEI)

Design of an S-band Ultra-low-noise Amplifier with Frequency Band Switching Capability

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Volume 5, Issue 1 - Serial Number 9
January 2017
Pages 13-18

Design of an S-band Ultra-low-noise Amplifier with Frequency Band Switching Capability

References

References

Send comment about this article

Volume 5, Issue 1 - Serial Number 9January 2017Pages 13-18

Volume 5, Issue 1 - Serial Number 9
January 2017
Pages 13-18