TY - GEN
T1 - Harmonic othogonality condition in RF Class-E Power Amplifiers
AU - Medina, M. A.Yarleque
AU - Schreurs, D.
AU - Nauwelaers, B.
PY - 2006
Y1 - 2006
N2 - Conventionally, it is stated that Class-E Power Amplifiers provide 100% efficiency because there is no overlapping between the current and the voltage time-domain waveforms, i.e., zero device power dissipation. A further frequency-domain analysis establishes that the condition for 100% efficiency requires the previous time-domain condition plus the orthogonality of the current and voltage harmonic components higher than the first harmonic. This paper presents this harmonic analysis for the typical class E PA with linear output capacitance and extends the study to the class E PA with non-linear output capacitance. According to our results, the latter case does not fulfill the orthogonality condition and therefore it cannot be established that DC power is equal to the fundamental output power as it is assumed in other research works.
AB - Conventionally, it is stated that Class-E Power Amplifiers provide 100% efficiency because there is no overlapping between the current and the voltage time-domain waveforms, i.e., zero device power dissipation. A further frequency-domain analysis establishes that the condition for 100% efficiency requires the previous time-domain condition plus the orthogonality of the current and voltage harmonic components higher than the first harmonic. This paper presents this harmonic analysis for the typical class E PA with linear output capacitance and extends the study to the class E PA with non-linear output capacitance. According to our results, the latter case does not fulfill the orthogonality condition and therefore it cannot be established that DC power is equal to the fundamental output power as it is assumed in other research works.
KW - Class-E
KW - Harmonic ortogonality
KW - Non-linear capacitance
KW - Zero voltage switching (ZVS)
UR - https://www.scopus.com/pages/publications/44849083919
U2 - 10.1109/APMC.2006.4429457
DO - 10.1109/APMC.2006.4429457
M3 - Conference contribution
AN - SCOPUS:44849083919
SN - 4902339080
SN - 9784902339086
T3 - Asia-Pacific Microwave Conference Proceedings, APMC
SP - 437
EP - 440
BT - 2006 Asia-Pacific Microwave Conference Proceedings, APMC
T2 - 2006 Asia-Pacific Microwave Conference, APMC
Y2 - 12 December 2006 through 15 December 2006
ER -