Analysis and Measurement of Two Tone intermodulation distortion in Wideband Power Amplifier

Rajbir Kaur; M.S. Patterh

doi:https://doi.org/10.14445/22315381/IJETT-V29P235

Research Article | Open Access | Download PDF

Volume 29 | Number 1 | Year 2015 | Article Id. IJETT-V29P235 | DOI : https://doi.org/10.14445/22315381/IJETT-V29P235

Analysis and Measurement of Two Tone intermodulation distortion in Wideband Power Amplifier

Rajbir Kaur, M.S. Patterh

Citation :

Rajbir Kaur, M.S. Patterh, "Analysis and Measurement of Two Tone intermodulation distortion in Wideband Power Amplifier," International Journal of Engineering Trends and Technology (IJETT), vol. 29, no. 1, pp. 189-191, 2015. Crossref, https://doi.org/10.14445/22315381/IJETT-V29P235

Abstract

Wideband power amplifiers (PAs) generally have large memory effect and high nonlinearity. In non-linearity, Inter modulation distortion (IMD) is an important metric. For a wide range of RF components, the usual AM-AM and AMPM data cannot properly describe the large distortion characteristics. So an accurate amplifier behavioral modeling method based on two-tone transfer characteristics is presented, which is quite useful to analyze memory effects for third and fifth order harmonic in terms of intercept points, and these are calculated using the harmonic balance test. PA gain for harmonic level simulation and circuit level simulation is calculated. The memory effects are analyzed up to 5th order and the dominance of memory effects in third order has been verified with the simulation results.

Keywords

Behavioral Model, Gain compression, Inter modulation distortion, Memory effects.

References

[1] Hyunchul Ku, J. Stevenson Kenney, “Behavioral modeling of nonlinear RF power amplifiers considering memory effects, IEEE transactions on microwave theory and techniques, vol 51, pp. 2495-2503, 2003.

[2] P. B. Kenington, High-linearity RF amplifier design, Artech House, Boston, London, 2000.

[3] F. H. Raab, P. Asbeck, S. Cripps, P. B. Kenington, Z. B. Popovic, N. Pothecary, J.F. Sevic, N. O. Sokal, “Power amplifiers and transmitters for RF and microwave,” IEEE Transactions on Microwave Theory and Techniques, vol. 50, pp. 814–826, Mar. 2002.

[4] Singla, R., & Sharma, S., ?Digital predistortion of power amplifiers using look-up table method with memory effects for LTE wireless systems, EURASIP Journal on Wireless Communications and Networking, pp. 1-8, 2012.

[5] H. Ku, M. D. McKinley, and J. S. Kenney, ?Quantifying memory effects in RF power amplifiers, IEEE Trans. Microwave Theory Tech., vol. 50, pp. 2843–2849, Dec. 2002.

[6] N. Borges De Carvalho and J. C. Pedro, “Two-tone IMD asymmetry in microwave power amplifiers, IEEE MTT-S Int. Microwave Symp. Dig, pp. 445–448, 2000.

[7] H. Ku, M. D. Mckinley, and J. S. Kenney, ?Extraction of accurate behavioral models for power amplifiers with memory effects using two-tone measurements, IEEE MTT-S Int. Microwave Symp. Dig., pp.139–142, 2002.

[8] D. Wisell, M. Isaksson and N. Keskitalo, ?A general evaluation criteria for behavioral power amplifier modeling, in ARFTG 69, Honolulu, USA, pp. 251-255, 2007.

[9] S. C. Cripps, RF Power Amplifiers for Wireless Communications, 2nd ed. Boston: Artech House, 2006.