Abstract
AbstractA closed‐form solution for the continuous inverse class E (class E−1) design space is presented for the first time1. Analogous to the class‐E power amplifier (PA) modes, the zero current and its derivative conditions needed for the class E−1 switching action can also be shown to be satisfied with any second harmonic susceptance. The complementary relationship between the continuous PA modes for class E and class E−1 are analytically proven. Signal integrity limitations on the continuous class E and class E−1 PA modes are demonstrated to exist and to limit the useful range of solutions of the design space. 2Consequently, the maximum achievable bandwidth using the continuum of solutions in both class E/E−1 is not 2 octaves as previously reported but only 1 octave.
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