PERFORMANCE STABILIZATION OF STEEP GAIN GRADIENT CLASS ULTRA-WIDEBAND DIRECT CONVERSION IFM RECEIVER OF HOMODYNING BASED SYSTEMS

Authors

  • Mahadev Sarkar 5Central D&E, Bharat Electronics Bangalore-560013
  • Vipin Kumar Central D&E, Bharat Electronics Bangalore-560013
  • Sivakumar R Central D&E, Bharat Electronics Bangalore-560013
  • Manjunath R Central D&E, Bharat Electronics Bangalore-560013
  • Nagarjuna Charlu S Central D&E, Bharat Electronics Bangalore-560013

DOI:

https://doi.org/10.53555/eijas.v3i2.45

Keywords:

Homodyning down conversion, Instantaneous Frequency Measurement (IFM), Direction Finding (DF), Direction of Arrival (DOA), Gain slopes and Domain based equalizers

Abstract

This article explains finding of power issues and the methodology of giving a suitable solution for performance stabilization of an ultra-wideband very high gain receiver with steep gain gradient.  The origin of this problem lies in homodyning down conversion technique itself. Its LO is derived from input RF source. Varieties of frequency band limited equalizers like RC, RL and RLC are examined to overcome initial gain fluctuations at low frequencies as well as region based gain humps to reduce slope gradient. Thereby at the same time it helps to enhance practically achievable gain against theoretical gain at around highest frequencies by reducing power distribution among all harmonic and spurious components caused by lower frequency elements.

References

W. F. Egdan, “Practical RF System Design”, Wiley-IEEE Press, 2003

B. Razavi, "Design considerations for direct - conversion receivers, " IEEE Trans Circuits System-II, Analog and Digital Signal Processing, vol. 44, pp. 428-435, June 1997

J. Crols, M.S. Steyaert, "Low-IF topologies for high-performance analog front ends of fully integrated receivers," IEEE Trans Circuits Syst. -II, Analog and Digital Signal Processing, vol. 45, pp. 269-282, March 1998.

J.C. & Carvalho, N.B. “Designing Multisine Excitations for Nonlinear Model Testing, IEEE Transactions Microwave Theory and Techniques, Vol. 53, No. 1, pp. 45- 54, January 2005, ISSN: 0018-9480, 2005.

J. C. and Carvalho, N. B. “Intermodulation Distortion in Microwave and Wireless Circuits”, Artech House, ISBN 1-58053-356-6, Norwood, USA, 2003

P. I. Mak, S. P. U, and R. P. Martins, “Transceiver architecture selection: Review, State-of-the-Art Survey and Case Study”, IEEE Circuits and Systems Magazine, vol. 7, 2nd quarter 2007, pp. 6-25.

Zhou, T.-F., Y. Zhang, and R.-M. Xu, “Research on the millimeter wave gain equalizer," IEEE International Conference on Microwave echnology & Computational Electromagnetics (ICMTCE), 180-182, May 2011

Thornber M., “Amplitude Equalizer Flattens Gain from 50 MHz to 7 GHz” Microwaves & RF, Vol. 46, No. 10, October 2007.

H Wang, B. Yan, Z. Wang, and R. Xu, “A Broadband Microwave Equalizer” Progress In Electromagnetics Research Letters, vol. 33, pp. 63 – 72, 2012.

G. Gonzalez, “Microwave Transistor Amplifier Analysis and Design”, Prentice Hall Inc, 1994.

Downloads

Published

2017-06-27

Issue

Vol. 3 No. 2 (2017): EPH - International Journal of Applied Science ( ISSN: 2208-2182 )

Section

Articles

License

Copyright (c) 2017 EPH - International Journal of Applied Science (ISSN: 2208-2182)

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.