Harmonics Amplitude Measurement in UHF Band by Multi Harmonic Multiplication
Keywords:
Conversion loss, harmonics amplitude, single diode mixerAbstract
Analysis of a system to measure the amplitude of harmonics of a signal in UHF band is presented. First, analytical considerations are proposed, in which multi harmonic signal is used as local oscillator signal. The results are used to obtain optimal implementation by which conversion loss of mixer becomes minimal. The proposed method is implemented by single diode mixer. In mixer, harmonics of the desired signal to be measured are fed into RF port and a comb signal is synthesized to be fed into LO port to down convert the desired signal. Bottle neck is the amplitude of each harmonic in comb signal fed in LO port of mixer. The proposed design is validated and optimized by ADS (a full wave electromagnetic simulator). Optimization of conversion loss of the mixer boots the system bandwidth.
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References
Application Note 150, Agilent Spectrum Analysis Basics, Agilent Technologies, Inc., Aug. 2006.
J. Wood and D. E. Root, Fundamentals of Nonlinear Behavioral Modeling for RF and Microwave Design, Norwood, MA: Artech House, 2005.
J. Wood, M. LeFevre, D. Runton, J. C. Nanan, B. H. Noori, and P. H. Aaen, “Envelope-domain time series (ET) behavioral model of a doherty RF power amplifier for system design,” IEEE Trans. Microwave Theory and Techniques, vol. 54, no. 8, Aug. 2006.
F. Macraigne, T. Reveyrand, G. Neveux, D. Barataud, J. M. Nebus, A. Soury, and E. N. Goya, “Time-domain envelope measurements for characterization and behavioral modeling of nonlinear devices with memory,” IEEE Trans. Microwave Theory and Techniques, vol. 54, no. 8, Aug. 2006.
D. Barataud, A. Mallet, M. Campovecchio, J. M. Nebus, J. P. Villotte, and J. Verspecht, “Measurements of time domain voltage/current waveforms at R.F. and microwave frequencies for the characterization of nonlinear devices,” Proc. IEEE Instrum. Meas. Technol. Conf., vol. 2, pp. 1006–1010, May 1998.
W. V. Moer and Y. Rolain, “A large-signal network analyzer: Why is it needed?,” IEEE Microwave Mag., vol. 76, pp. 46-62, Dec. 2006.
W. V. Moer and L. Gomme, “NVNA Versus LSNA: Enemies or Friends?,” IEEE Microwave Mag., vol. 11, no. 1, pp. 97–103, Feb. 2010.
Application Note 1408-19, High Power Amplifier Measurements Using Agilent’s Nonlinear Vector Network Analyzer, Agilent Technologies Inc., 26 Jan. 2010.
J. Verspecht and D. E. Root “Poly harmonic distortion modeling,” IEEE Microwave Mag., vol. 7, no. 3, pp. 44-57, June 2006.
Application Note 1408-22, An Evaluation of Xparameter, P2D and S2D Models for Characterizing Nonlinear Behavior in Active Devices, Agilent Technologies Inc., 29 Aug. 2011.
R. Gilmore and L. Besser, Practical RF Circuit Design for Modern Wireless Systems, Volume II , Active Circuits and Systems, chapter 7, Artech House, 2003.
