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

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2015 by IJETT Journal
Volume-29 Number-4
Year of Publication : 2015
Authors : Rajbir Kaur, M.S. Patterh
DOI :  10.14445/22315381/IJETT-V29P235


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), V29(4),189-191 November 2015. ISSN:2231-5381. published by seventh sense research group

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.


[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.

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