Journal ArticleDOI
Improving the Graceful-Degradation Performance of Combined Power Amplifiers
TLDR
In this paper, two schemes are discussed that improve the graceful-degradation performance of hybrid power dividers/combiners when one or more of the amplifiers fails, by replacing each failed amplifier by an equal-delay "through" connection and by using a resistor-free combiner.Abstract:
The standard method of employing n-way hybrid power divider/combiner to combine n amplifiers offers some sort of graceful-degradation performance when one or more of the amplifiers fail. Two schemes are discussed that improve that performance significantly. The first, which was proposed previously, involves replacing each failed amplifier by an equal-delay "through" connection. The second involves using a resistor-free combiner, and seperating each failed amplifier from the combiner by an appropriately placed short or open circuit.read more
Citations
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Journal ArticleDOI
Millimeter-Wave Power-Combining Techniques
Kai Chang,Cheng Sun +1 more
TL;DR: In this article, the authors summarized different power-combining techniques and their performance, with particular emphasis on millimeter-wave developments, and discussed the tradeoffs of these techniques and future trends predicted.
Book
High Efficiency RF and Microwave Solid State Power Amplifiers
TL;DR: In this paper, the authors present an overview of power amplifiers and their application in the context of load-pulling and power-combiner networks, as well as their properties.
Journal ArticleDOI
A simplified design approach for radial power combiners
TL;DR: In this article, a step-by-step design procedure for a radial power combiner was developed, including both the initial approximate design formulas and suitable models for final accurate design optimization purposes.
Journal ArticleDOI
Some considerations for optimal efficiency and low noise in large power combiners
TL;DR: In this paper, the authors examined some relationships between important design parameters in large combiner systems and key performance objectives such as power, efficiency, noise, and graceful degradation, showing that phase errors are the dominant factor in power degradation.
References
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Journal ArticleDOI
An N-Way Hybrid Power Divider
TL;DR: In this article, a circularly symmetric power divider is described which splits a signal into n equiphase equiamplitude parts where n can be odd or even.
Journal ArticleDOI
Planar Electrically Symmetric n-Way Hybrid Power Dividers/Combiners
TL;DR: In this paper, the match and isolation properties of planar electrically symmetric n-way hybrid power dividers/combiners are studied, which resemble the Wilkinson hybrid, are named the "radial" hybrid, and the "fork" hybrid.
Journal ArticleDOI
New n-Way Hybrid Power Dividers
N. Nagai,E. Maekawa,K. Ono +2 more
TL;DR: In this paper, a new n-way planar hybrid power divider (henceforth HPD) and an nway coaxial-type HPD are proposed, and the synthesis methods of three-way and four-way HPD's are shown.
Proceedings ArticleDOI
A wideband radial power combiner for FET amplifiers
J. Schellenberg,M. Cohn +1 more
TL;DR: A power combining technique for GaAs FET amplifiers using a 12-way divider-combiner has demonstrated a 31% 1dB bandwidth with an insertion loss of 0.25dB and a CW output power of 4.4W at 8.5GHz.
Proceedings ArticleDOI
Graceful Degradation Properties of Matched N-Port Power Amplifier Combiners
TL;DR: In this article, the graceful degradation properties of matched isolated power combiners as a function of amplifier failures of the same type was determined using general techniques applicable to all such circuits and the effects of complete amplifier failures, amplitude and phase imbalances and poor VSWRs on overall combiner system output power, combining efficiency and input-output impedances can be determined by the resulting equations and plots.