Wideband PA Design: The "Continuous" Mode of Operation

Tasker, P.J.; Carrubba, V.; Wright, Peter; Lees, J.; Benedikt, J.; Cripps, Steve C.

doi:10.1109/csics.2012.6340118

Cited by 19 publications

(14 citation statements)

References 12 publications

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“…The conventional PA generally considers one isolated point among the load impedances , but the load impedances of continuous PA are a family of inherently linked values. In [2][3] the drain voltage formula of the continuous Class-B mode PA is given as follows:…”

Section: A the Optimum Load Impedances Of Continuous Pamentioning

confidence: 99%

“…When D=-1 and D=1, the equation (1) corresponds to Class-J and Class-J* mode, respectively. In [3] the equations of the fundamental and second harmonic impedances defined at the current generator plane are derived, which can maintain the same output power and drain efficiency of the continuous Class -B mode PA.…”

Section: A the Optimum Load Impedances Of Continuous Pamentioning

confidence: 99%

“…In [2][3] the real part of fundamental impedance is obtained as R opt =35.2Ω. Because the voltage waveforms of equation (1) are positive, so ±35.2Ω should be the min imu m and maximu m of the reactance of fundamental impedances [3]. The equivalent network of output parasitics of GaN HEMT device CGH40010F is constructed [6], as shown in Figure 1 and C ds is drain-source capacitance.…”

Section: A the Optimum Load Impedances Of Continuous Pamentioning

confidence: 99%

“…It is a good way to reduce the production and operating cost of the wireless communicat ion equipments, and promote the min iaturization of mu lti-mode wireless system by doing research on the design of high efficiency and wideband power amplifier. In [1][2][3] Cripps proposed a theory on the continuous PA and derived some design equations, which could achieve an octave bandwidth and provide a new method to design broadband PA. Carrubba [4] and Neal Tuffy [5] designed continuous class F mode amp lifiers to verify the feasibility of continuous PA theory. However, their output power was limited to tens of watts and the applications on hundreds of watts remains to be verified.…”

Section: Introductionmentioning

confidence: 99%

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A new method of designing high efficiency and wideband power amplifier

Shao

You

et al. 2014

2014 IEEE International Conference on Communiction Problem-Solving

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This paper presents a new method to design high efficiency and wideband power amplifier (PA). Based on the output parasitics network of MOS FET, this method shifts the optimum load impedances from the intrinsic plane to the package plane, which are obtained by the continuous PA theory and then rectified elaborately by multi-harmonic bilateral-pull technology, in order to make the second harmonic load impedances in high efficient region as well as the fundamental load impedances with high power added efficiency (PAE) and output power. A simulated example based on the GaN HEMT device CGH40010F is designed to verify the proposed method.Index termshigh efficiency; wideband; continuous PA; multi-harmonic bilateral-pull technology ____________________________________ 978-1-4799-44-/14/$31.00 ©2014 IEEE

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Section: A the Optimum Load Impedances Of Continuous Pamentioning

confidence: 99%

Section: A the Optimum Load Impedances Of Continuous Pamentioning

confidence: 99%

Section: A the Optimum Load Impedances Of Continuous Pamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A new method of designing high efficiency and wideband power amplifier

Shao

You

et al. 2014

2014 IEEE International Conference on Communiction Problem-Solving

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“…The reconstructed signal resemblance to the original signal is also assessed in the time domain using the normalized mean-squared error (NMSE) figure of merit. The calculated NMSE values that correspond to the cases where 2 , respectively. This level of NMSE shows that the effect of the proposed technique can be neglected and not compensated for without any significant impact on the characterization accuracy for both behavioral modeling and digital predistortion applications.…”

Section: Theoretical Background and Performance Analysismentioning

confidence: 99%

Extending the Characterization Bandwidth of Dynamic Nonlinear Transmitters With Application to Digital Predistortion

Bensmida

Hammi

Kwan

et al. 2016

IEEE Trans. Microwave Theory Techn.

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Abstract-This paper reports a new measurement method for wideband radiofrequency power amplifier characterization and digital predistortion. The proposed measurement procedure relaxes significantly the sampling rate requirement on the analog to digital converters of the feedback path. Successful PA linearizations were achieved in the presence of 20 MHz, 40 MHz, and 60 MHz LTE-A signals using a vector signal analyzer with sampling speeds equal to only 24 Msps, 40.96 Msps, and 61.44 Msps, respectively. Despite these very low sampling rates, a quasi perfect cancellation of the PA distortions was achieved (more than 50 dBc in terms of ACLR), in all tests, over bandwidths including up to fifth order intermodulation distortions. Such correction bandwidth is much wider than the observation bandwidths associated with the receiver sampling rates.Index Terms-Digital predistortion, dynamic distortions, LTEadvanced, memory effects, power amplifier, vector signal analysis, wideband. I. INTRODUCTIONODERN and future wireless communication systems provide high data rate capability. For this reason, transmitter architectures evolved to accommodate complex modulation schemes with high spectral efficiency. These architectures are designed to ensure the transmission of Manuscript submitted January 13, 2015, re-submitted July 27, 2015, revised December 5, 2015, revised February 7, 2016, revised June 21, 2016. This work was supported by the University of Bristol and King Fahd University of Petroleum and Minerals (KFUPM). The work of the iRadio Laboratory was supported mainly by Alberta Innovates -Technology Futures (AITF), Canada Research Chair (CRC) Program, and Natural Science and Engineering Council of Canada (NSERC).S. Bensmida and K.A. Morris are with are with the Communications Systems and Networks Group, University of Bristol, Bristol BS8 1UB, U.K. (e-mail: {s.bensmida, Kevin.Morris}@bristol.ac.uk).O. Hammi is with the Department of Electrical Engineering, American University of Sharjah, Sharjah, United Arab Emirates (e-mail: ohammi@ieee.org)A. Kwan and F.M. Ghannouchi are with the iRadio Laboratory, Department of Electrical and Computer Engineering, Schulich School of Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada (e-mail: {akckwan, fadhel.ghannouchi}@ucalgary.ca).M.S. Sharawi is with the Department of Electrical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia (e-mail: msharawi@kfupm.edu.sa).wideband signals in a linear manner. Any nonlinear behavior in the transmitter will distort the transmitted signal and hence corrupt the transmitted data. Radio frequency power amplifiers (RFPAs) are the most nonlinear and power consuming blocks in a transmitter's architecture. Therefore, special measures are taken to increase an RFPA linearity and efficiency. Significant research efforts have led to highly efficient RFPA architectures [1]- [7]. These architectures require linearization procedures to ensure compliance with the mandatory and well regulated linearity requirements of...

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Hybrid Microwave Power Amplifier Design

Colantonio

Cipriani

Giofrè

et al. 2014

Wiley Encyclopedia of Electrical and Electronics Engineering

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This article is dedicated to the hybrid microwave power amplifiers and to their design. It aims at giving an overview of the topic as complete as possible, although it does not expect to be exhaustive, given the complexity of the subject. Thus, an attempt was made to collect any useful information about hybrid power amplifiers from the designer's point of view. A summary of applications of hybrid power amplifiers is then provided, giving a comprehensive idea of the diffusion of such systems and of their employment according to different power level and frequency bands at which they are required to operate. From a strictly theoretical point of view, this article reports the main characteristic parameters of power amplifiers and their classification as derived from the traditional theory. A distinction between bias classes and operating classes is provided, recalling with some mathematical details different operating modes, in particular current mode and switched mode operations. Apart from mathematical‐based statements, this article addresses practical aspects that are essential in the design of a hybrid power amplifier, considering its elementary components and providing a description and an essential bibliography for each of them. Starting from the printed circuit board, which physically constitutes the amplifier, the active components (transistors) and passive components (discrete and distributed) are described, and some considerations about the final assembly are given. Finally, some design examples are provided: In particular, the design of a hybrid microwave power amplifier is detailed step by step, from theoretical aspects to the realization process.

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Wideband PA Design: The "Continuous" Mode of Operation

Cited by 19 publications

References 12 publications

A new method of designing high efficiency and wideband power amplifier

A new method of designing high efficiency and wideband power amplifier

Extending the Characterization Bandwidth of Dynamic Nonlinear Transmitters With Application to Digital Predistortion

Hybrid Microwave Power Amplifier Design

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