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Keywords
(15)
Behavior Modeling
Circuit Design
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Practical waveform engineering
Practical waveform engineering,10.1109/MMM.2009.934518,IEEE Microwave Magazine,Paul J. Tasker
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Practical waveform engineering
(
Citations: 6
)
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Paul J. Tasker
RF IV waveform measurement and engineering systems are now finally enabling practical waveform engineering to be directly undertaken with systems capable of supporting
continuous wave
stimulus reaching a high level of maturity. Ongoing
research and development
activities are presently addressing the multitone requirement. The availability of RF IV measurement and engineering capability extends the characterization opportunities for both highfrequency/speed transistor technology developers and circuit/system designers; terminal waveforms are the unifying theoretical link between transistor technology, circuit design, and system performance.
Design support
can involve the direct utilization of such a
measurement system
in the design investigation/evaluation loop of either power transistor technology or PAs. This eliminates the black box design processes and allows for the development of new
intelligent design
processes that are completely founded on theoretical waveform analysis. Alternatively, it can also indirectly support the amplifier investigation/evaluation loop by supporting the development or improving the accuracy of nonlinear transistor models or by providing CADaccessible behavioral or behavioral model parameter datasets. W can now only hope that, triggered by the availability of RF waveform measurement and engineering systems, we will see a renaissance in theoretical waveform
mathematical analysis
addressing not only power and efficiency but also design sensitivity and linearity.
Journal:
IEEE Microwave Magazine  IEEE MICROW MAG
, vol. 10, no. 7, pp. 6576, 2009
DOI:
10.1109/MMM.2009.934518
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Citation Context
(5)
...To demonstrate the chosen measurement approach, results were taken from a 10x75µm GaAs pHEMT device, operating at 9GHz using a waveform measurement system described in [
11
]...
J. J Bell
,
et al.
Behavioral model analysis using simultaneous active fundamental loadp...
...In the present case, a 4V amplitude of the gate input voltage is imposed, which leads to a peakvalue equal to 0 V. In Fig. 4(a), the device dc characteristics V V are shown: it is well evident that, due to the current collapse [7], the loadline is not able to dynamically reach the draincurrent values corresponding to the dc characteristic at V. Moreover, an important knee walkout [7], [
9
] is present...
...Moreover, also the knee walkout [7], [
9
] can be simply characterized...
Antonio Raffo
,
et al.
Characterization of GaN HEMT LowFrequency Dispersion Through a Multih...
...This paper is based around measurements carried out using the Open Loop Active Loadpull system, developed in Cardiff University and described in [I] and [
2
], with phase coherent Signal Generators...
R. S. Saini
,
et al.
An intelligence driven active loadpull system
...The socalled “waveform engineering” technique [
1
] may represent a valid alternative to classical PA design approaches [2][3]...
A. Raffo
,
et al.
“Hybrid” approach to microwave power amplifier design
...A linear network can be fully described by the use of S parameters [
6
], which are made up of the ratios of incident and scattered voltage traveling waves at a single frequency...
...To demonstrate the necessary measurement approach, results were taken for a lOx7Sflm GaAs HEMT device, operating at 9GHz using the waveform measurement system developed at Cardiff Uni versity [
6
]...
S. Woodington
,
et al.
Behavioral model analysis of active harmonic loadpull measurements
References
(49)
A theoretical analysis and experimental confirmation of the optimally loaded and overdriven RF power amplifier
(
Citations: 78
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Journal:
IEEE Transactions on Electron Devices  IEEE TRANS ELECTRON DEVICES
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IEEE Transactions on Microwave Theory and Techniques  IEEE TRANS MICROWAVE THEORY
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(
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IEEE Transactions on Microwave Theory and Techniques  IEEE TRANS MICROWAVE THEORY
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Sort by:
Citations
(6)
GaAs Xband high efficiency (>65%) Broadband (>30%) amplifier MMIC based on the Class B to Class J continuum
J. R. Powell
,
M. J. Uren
,
T. Martin
,
A. McLachlan
,
P. Tasker
,
S. Woodington
,
J. Bell
,
R. Saini
,
J. Benedikt
,
S. C. Cripps
Conference:
Microwave, MTTS International Symposium  MTT
, pp. 14, 2011
Behavioral model analysis using simultaneous active fundamental loadpull and harmonic sourcepull measurements at Xband
J. J Bell
,
R. Saini
,
S. Woodington
,
J. Lees
,
J. Benedikt
,
S. Cripps
,
P. J. Tasker
Conference:
Microwave, MTTS International Symposium  MTT
, pp. 14, 2011
Characterization of GaN HEMT LowFrequency Dispersion Through a Multiharmonic Measurement System
(
Citations: 2
)
Antonio Raffo
,
Sergio Di Falco
,
Valeria Vadala
,
Giorgio Vannini
Journal:
IEEE Transactions on Microwave Theory and Techniques  IEEE TRANS MICROWAVE THEORY
, vol. 58, no. 9, pp. 24902496, 2010
An intelligence driven active loadpull system
(
Citations: 1
)
R. S. Saini
,
S. Woodington
,
J. Lees
,
J. Benedikt
,
P. J. Tasker
Conference:
ARFTG Conference  ARFTG
, 2010
“Hybrid” approach to microwave power amplifier design
(
Citations: 1
)
A. Raffo
,
V. Vadalà
,
S. Di Falco
,
F. Scappaviva
,
G. Vannini
Conference:
International Workshop on Integrated Nonlinear Microwave and Millimeterwave Circuits  INMMIC
, 2010