Physics of Wave Processes and Radio SystemsPhysics of Wave Processes and Radio Systems1810-31892782-294XPovolzhskiy State University of Telecommunications and Informatics1091510.18469/1810-3189.2022.25.4.46-51Research ArticlePhase frequency characteristics evaluation for E-class devices output circuitsBaranovAlexander V.baranov.micros@yandex.ruJSC «RPE “Salute”»31122022254465125122022Copyright © 2022, Baranov A.V.2022<p>Based on the unitarity of the E-class device circuit [S]-matrix, the phase frequency characteristics are estimated for the output circuit at any harmonic of the fundamental frequency. Formulas are derived for approximate phase frequency characteristics of an E-class device model with a switch that operates in two states corresponding to either zero or infinite active resistances. Using the example of the presented phase-frequency characteristics of the E-class power amplifier layout, the validity of the formulas obtained is confirmed. Taking into account the conclusions drawn from the formulas, recommendations are formulated for making additions to the well-known methods of designing E-class devices. These techniques can be supplemented by the introduction of parameter settings of the elements of the output circuits, for which the established estimated values of the phase frequency characteristics of the output circuit on harmonics are most respected with the maximum possible number of them.</p>E-class devicesoutput circuitphase frequency characteristicsустройства Е-классавыходная цепьфазочастотная характеристика[Kozyrev V.B. et al. Transistor Generators of Harmonic Oscillations in Key Mode. Ed. by I.A. Popov. Moscow: Radio i svyaz’, 1985, 192 p. (In Russ.)][Artym A.D. et al. Improving the Efficiency of High-Power Radio Transmitting Devices. Ed. by A.D. Artym. Moscow: Radio i svyaz’, 1987, 176 p. (In Russ.)][Kryzhanovskiy V.G. High Efficiency Transistor Amplifiers. Donetsk: Apeks, 2004, 448 p. (In Russ.)][Grebennikov A.V., Sokal N.O. Switchmode RF Power Amplifiers. Burlington: Newnes, Elsevier, 2007, 424 p.][Baranov A.V., Morugin S.L. Transistor Amplifiers-Power Limiters of Harmonic Microwave Oscillations. Moscow: Goryachaya liniya – Telekom, 2019, 332 p. (In Russ.)][Baranov A.V., Krevskiy M.A. Transistor Self-Oscillators of Harmonic Microwave Oscillations. Moscow: Goryachaya liniya – Telekom, 2021, 276 p. (In Russ.)][Kryzhanovskiy V.G., Printsovskiy V.A. Class E microwave oscillator. Izv. vysshikh uchebnykh zavedeniy. Radioelektronika, 2006, vol. 49, no. 11, pp. 43–51. (In Russ.)][Vil’mitskiy D.S., Devyatkov G.N. Mathematical model of an ideal class E device. Izv. vuzov Rossii. Radioelektronika, 2010, no. 3,][pp. 16–25. (In Russ.)][Fel’dshteyn A.L., Yavich L.R. Synthesis of Quadripoles and Eight-Poles at Microwave. Moscow: Svyaz’, 1965, 352 p. (In Russ.)][Matthaei D.L., Young L., Jones E.M.T. Microwave Filters, Impedance-Matching Networks, and Coupling Structures. Ed. by L.V. Alekseev, F.V. Kushnir. Moscow: Svyaz’, 1971, 440 p. (In Russ.)][Baranov A.V. Designing high-power microwave amplifiers in class «Е». Radiotekhnika, 2006, no. 12, pp. 65–70. (In Russ.)][Razevig V.D., Potapov Yu.V., Kurushin A.A. Designing Microwave Devices with Microwave Office. Ed. by V.D. Razevig. Moscow: Solon-Press, 2003, 496 p. (In Russ.)]