Inverse class-f power amplifier using slot resonators as a harmonic filter

Yu. V. Rassokhina; V. G. Krizhanovski; V. A. Kovalenko; P. Colantonio; R. Giofre

doi:10.15222/TKEA2014.2-3.18

Yu. V. Rassokhina Donetsk National University, Donetsk, Ukraine
V. G. Krizhanovski Donetsk National University, Donetsk, Ukraine
V. A. Kovalenko Donetsk National University, Donetsk, Ukraine
P. Colantonio University of Rome Tor Vergata, Roma, Italy
R. Giofre University of Rome Tor Vergata, Roma, Italy

DOI: https://doi.org/10.15222/TKEA2014.2-3.18

Keywords: power amplifiers, class F, inverse class F, microstrip line, slot resonator

Abstract

The authors proposed and experimentally verified the power amplifier circuit of inverse class F (F–1) based on GaN transistor NPTB00004, operating at 1,7 GHz. The novelty of this scheme is the application of a three-layer structure based on slot rectangular shaped resonators in the ground plane of the microstrip transmission line as a filter of higher harmonics. To control the levels of the second and third harmonics in the output signal spectrum and simultaneously to match the 50 ohm load at the operating frequency of the amplifier, a planar periodic structure is used, consisting of two slot resonators of different lengths. Power added efficiency for experimental model of the amplifier is 60% at an output power of 3.9 W and a gain factor of 13 dB.

References

Colantonio F., Giannini F., Limiti E. High efficiency RF and microwave solid state power amplifiers. Hoboken, NJ, Wiley, 2009.

Raab F. H. Class-F power amplifiers with maximally flat waveforms. IEEE Trans. Microwave Theory Tech., 1997, vol. 45, N 11, pp. 2007-2012. https://doi.org/10.1109/22.644215

Raab F. H. Maximum efficiency and output of class-F power amplifiers. IEEE Trans. Microwave Theory Tech., 2001, vol. 49, no 6, pp. 1162-1166. https://doi.org/10.1109/22.925511

Kim J. H., Do Jo G., Oh J. H. et al. Modeling and design methodology of high-efficiency class-F and class-F-1 power amplifiers. IEEE Trans. Microwave Theory Tech., 2011, vol. 59, no 1, pp. 153-165.

Woo Y. I. N., Yang Y., Kim B. Analysis and experiments for high-efficiency class-F and inverse class-F power amplifiers. IEEE Trans. Microwave Theory Tech., 2006, vol. 54, no 5, pp. 1969-1974.

Woo Y. I. N., Yang Y., Kim I., Kim B. Efficiency comparison between highly efficient class-F and inverse class-F power amplifiers. IEEE Microwave Mag., 2007, vol. 8, no 3, pp. 100-110.

Cipriani E., Colantonio P., Giannini F., Giofrè R. Theoretical and experimental comparisons of class F vs. class F-1 PAs. Proc. of the Microwave Integrated Circuits Conference (EuMIC), Paris, France, 2010, pp. 428-431.

Carrubba V., Clarke A. L., Akmal M., Lees J., Benedikt J., Tasker P.J., Cripps S.C. On the extension of the continuous class-F mode power amplifier. IEEE Trans. Microwave Theory Tech., 2011, vol. 59, no 5, pp. 1294-1303. https://doi.org/10.1109/TMTT.2011.2117435

Dupuy A., Leong K. M. K. H., Staraj R., Jacquemod G., Itoh T. Inverse class-F power amplifier using composite right/left-handed transmission lines as a harmonic trap. Proc. of the 36th European Microwave Conference, Manchester, UK, 2006, pp. 360–363. https://doi.org/10.1109/EUMC.2006.281348

Krizhanovski V. G., Rassokhina Yu. V. The transverse resonance technique modification for analysis of slot resonators in microstrip line ground plane. Proc. of the 21th International Crimean Conference Microwave and Telecommunication Technology (CriMiCo), 2011, vol. 2, pp. 601–602.

Rassokhina Yu. V., Krizhanovski V.G. Periodic structure on the slot resonators in microstrip transmission line. IEEE Transactions on Microwave Theory and Techniques, 2009, vol. 57, no 7, pp. 1694–1699. https://doi.org/10.1109/TMTT.2009.2022814

Rassokhina Yu. V., Krizhanovski V. G. Analysis of coupled slot resonators of complex shape in metalization plane of a micro-strip transmission line using the transversal resonance techniques. Radioelectron. Commun. Syst., 2012, vol. 55, no 5, рр . 214-222. https://doi.org/10.3103/S0735272712050032

Krizhanovski V.G., Rassokhina Yu.V., Colantonio P. The output circuit of inverse class F power amplifier with slot resonators in the microstrip line ground plane. Proc. of the 21th International Crimean Conference Microwave and Telecommunication Technology (CriMiCo), 2011, vol. 1, pp. 141–142.

Nemati H. M., Saad P., Fager Ch., Andersson K. Highefficiency power amplifier, IEEE Microwave Magazine, 2011, vol. 12, no 1, pp. 81–84. https://doi.org/10.1109/MMM.2010.939314