Referenced Items are not available for this document.
Push-pull power amplifiers (PAs) operating at HF through to GHz frequencies typically employ a transmission line balun structure. This letter demonstrates that their performance characteristics in high efficiency PA applications are critically different from conventional transformers. For the first time, the effect of the even-mode open-circuit termination on the output waveforms is measured. A novel mathematical formulation is proposed to describe the time-domain waveforms by defining the harmonic impedance environment in terms of odd and even mode excitation rather than tuned harmonics. Experimental verification using harmonic load-pull measurements showed good agreement with the theoretical waveforms generated from factorized waveform expressions.
Published in:
Microwave and Wireless Components Letters, IEEE
(Volume:22
,
Issue:
5
)
Date of Publication: May 2012
- Page(s):
- 257 - 259
- ISSN :
- 1531-1309
- INSPEC Accession Number:
- 12711796
- Digital Object Identifier :
- 10.1109/LMWC.2012.2191273
- Product Type:
- Journals & Magazines
- Date of Publication :
- 16 April 2012
- Date of Current Version :
- 04 May 2012
- Issue Date :
- May 2012
- Sponsored by :
- IEEE Microwave Theory and Techniques Society
About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies
A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2013 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.
