Comparison of IMD Symmetry and Asymmetry Model in Power Amplifier Based on Multisine Excitation

Abstract:

This paper proposes system level behavior model of a nonlinear power amplifier that exhibit the IMD asymmetry effect based on multisine excitation. For this work, a third order power series coefficients are originatively represented with both the system level circuit features such as a second output intercept point (OIP₂), a third output intercept point (OIP₃), amplifier gain and its excitation amplitudes. In addition, the memory effect like the asymmetry in lower and upper intermodulation products are distinguished through the analytic description and measurement. The main advantage of the proposed theory is able to analyze the composition of the nonlinear response in power amplifier. This paper also presents the measured results to validate the analytic expressions.

• Periodical: Advanced Materials Research (Volume 717)
• Pages: 328-332
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.717.328
• Online since: July 2013
• Authors: Yong Kuk Park, Min Goo Lee, Kyung Kwon Jung, Jun Jae Yoo
• Keywords: IMD Asymmetry, IMD Symmetry, Nonlinear Response, System Level Behavior Model

References

[1] J.C. Pedro and N.B. De Carvalho, in: On the use of multitone technique for assessing RF components' intermodulation distortion, volume 45 of IEEE Trans. Microwave Theory Tech(1999).

DOI: 10.1109/22.808986

[2] J.H.K Vuolevi, T. Rahkonen and J.P.A Manninen, in: Measurement technique for characterizing memory effects in RF power amplifiers, volume 49 of IEEE Trans. Microwave Theory Tech(2001).

DOI: 10.1109/22.939917

[3] N. Boulejfen, A. Harguem and F.A. Ghannouchi, in: New closed-form expressions for the prediction of multitone intermodulation distortion in fifth-order nonlinear RF circuits/systems, volume 52 of IEEE Trans. Microwave Theory Tech(2004).

DOI: 10.1109/tmtt.2003.821259

[4] J.P. Martins, N.B Carvalho and J.C Pedro, in: Intermodulation Distortion of Third-Order Nonlinear Systems With Memory Under Multisine Excitations, volume 55 of IEEE Trans. Microwave Theory Tech(2007).

DOI: 10.1109/tmtt.2007.896794

[5] A. Walker, M. Steer and K.G Gard, in: A Vector intermodulation analyzer applied to behavioral modeling of nonlinear amplifiers with memory, volume 54 of IEEE Trans. Microwave Theory Tech(2006).

DOI: 10.1109/tmtt.2006.872810

[6] B. Razavi: RF Microelectronics (Prentice-Hall Publication, USA 1998).