On Optimal Truncated Biharmonic Current Waveforms for Class-F and Inverse Class-F Power Amplifiers
Joint Authors
Juhas, Anamarija
Novak, Ladislav A.
Dautovic, Stanisa
Source
Mathematical Problems in Engineering
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-19, 19 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-03-16
Country of Publication
Egypt
No. of Pages
19
Main Subjects
Abstract EN
In this paper, two-parameter families of periodic current waveforms for class-F and inverse class-F power amplifiers (PAs) are considered.
These waveforms are obtained by truncating cosine waveforms composed of dc component and fundamental and either second (k=2) or third (k=3) harmonic.
In each period, waveforms are truncated to become zero outside of a prescribed interval (so-called conduction angle).
The considered families of waveforms include both discontinuous and continuous waveforms.
Fourier series expansion of truncated waveform contains an infinite number of harmonics, although a number of harmonics may be missing.
Taking into account common assumptions that for class-F PA the third (n=3) harmonic is missing in current waveform and for inverse class-F PA the second (n=2) harmonic is missing in current waveform, we consider the following four cases: (i) n=k=3, (ii) n=3, k=2, (iii) n=k=2, and (iv) n=2, k=3.
We show that, in each of these cases, current waveform enabling maximal efficiency (optimal waveform) of class-F and inverse class-F PA is continuous for all conduction angles of practical interest.
Furthermore, we provide closed-form expressions for parameters of optimal current waveforms and maximal efficiency of class-F (inverse class-F) PA in terms of conduction angle only.
Two case studies of practical interest for PA design, involving suboptimal current waveforms, along with the results of nonlinear simulation of inverse class-F PA, are also presented.
American Psychological Association (APA)
Juhas, Anamarija& Dautovic, Stanisa& Novak, Ladislav A.. 2017. On Optimal Truncated Biharmonic Current Waveforms for Class-F and Inverse Class-F Power Amplifiers. Mathematical Problems in Engineering،Vol. 2017, no. 2017, pp.1-19.
https://search.emarefa.net/detail/BIM-1189505
Modern Language Association (MLA)
Juhas, Anamarija…[et al.]. On Optimal Truncated Biharmonic Current Waveforms for Class-F and Inverse Class-F Power Amplifiers. Mathematical Problems in Engineering No. 2017 (2017), pp.1-19.
https://search.emarefa.net/detail/BIM-1189505
American Medical Association (AMA)
Juhas, Anamarija& Dautovic, Stanisa& Novak, Ladislav A.. On Optimal Truncated Biharmonic Current Waveforms for Class-F and Inverse Class-F Power Amplifiers. Mathematical Problems in Engineering. 2017. Vol. 2017, no. 2017, pp.1-19.
https://search.emarefa.net/detail/BIM-1189505
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1189505