Theory and Implementation of RF-Input &lt;newline/&gt;Outphasing Power Amplification

Barton, Taylor W.; Perreault, David J.

doi:10.1109/tmtt.2015.2495358

Cited by 61 publications

(26 citation statements)

References 33 publications

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“…The instantaneous arbitrary input signal S in is divided into two signals S 1 and S 2 of constant amplitudes and variable angles by a signal conditioning circuit. If the gain and phase of the two branches are well balanced, the original signal is reconstructed at the output as S out after elevating the scales of the two branch signals . The specific equations regarding its operation are as follows:

S_{in} = v ((), t) \cdot \cos ((), ω ((), t) + φ ((), t)),

S_{1} = v_{0} \cdot \cos ((), ω ((), t) + φ ((), t) + θ ((), t)),

S_{2} = v_{0} \cdot \cos ((), ω ((), t) + φ ((), t) - θ ((), t)),

θ ((), t) = \arccos ((), \frac{v (t)}{v_{0}}),

where v ( t ) and φ ( t ) are the initial amplitude and phase of the input signal, while v 0 and θ ( t ) stand for the signal amplitude and modulated phase, respectively.…”

Section: Theoretical Analysismentioning

confidence: 99%

See 1 more Smart Citation

A compact outphasing power amplifier with integrated reactive compensation

Wang

Chen

Cai

et al. 2019

Micro & Optical Tech Letters

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An innovative design methodology is presented to simplify the architecture of outphasing power amplifier (PA). The proposed design, by absorbing transistor parasitic capacitance into reactance compensating network intrinsic for a Chireix outphasing amplifier, greatly reduces the complexity of impedance modulation network at the output side, hence reducing the overall circuit size. Theoretical formulations regarding the introduced design technique are fully described and the effectiveness is verified through the implementation of a 2.6‐GHz PA prototype intended for long term evolution application. The realized circuit achieves maximum power of 44.8 dBm based on two 10‐W gallium nitride (GaN) high electron mobility transistor (HEMTs), accompanying maximum 73.3% drain efficiency between the saturation point and 6‐dB output back‐off point. At the 6‐dB output back‐off point, the drain efficiency reaches 63.5%.

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S_{in} = v ((), t) \cdot \cos ((), ω ((), t) + φ ((), t)),

S_{1} = v_{0} \cdot \cos ((), ω ((), t) + φ ((), t) + θ ((), t)),

S_{2} = v_{0} \cdot \cos ((), ω ((), t) + φ ((), t) - θ ((), t)),

θ ((), t) = \arccos ((), \frac{v (t)}{v_{0}}),

where v ( t ) and φ ( t ) are the initial amplitude and phase of the input signal, while v 0 and θ ( t ) stand for the signal amplitude and modulated phase, respectively.…”

Section: Theoretical Analysismentioning

confidence: 99%

“…If the gain and phase of the two branches are well balanced, the original signal is reconstructed at the output as S out after elevating the scales of the two branch signals. 7,8 The specific equations regarding its operation are as follows:…”

Section: Outphasing Pa Principlesmentioning

confidence: 99%

A compact outphasing power amplifier with integrated reactive compensation

Wang

Chen

Cai

et al. 2019

Micro & Optical Tech Letters

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“…Recent attempts to design voltage-mode Class-D GaN PAs can be found in the literature [107,108]. However, most realizations of GaN outphasing PAs are currently based on saturated Class-B [101,109] or on Class-F PAs [110][111][112], with consequent sub-optimal efficiency curve.…”

Section: The Voltage Source Issuementioning

confidence: 99%

“…These components should have an effective resistance that depends on the input power, according to an appropriate law. These non-linear variable resistances can be practically realised exploiting either a diode-based network [112] or the intrinsic input impedance variation with the drive level that affects non-ideal active devices [118]. …”

Section: Single-input Architecturesmentioning

confidence: 99%

High Efficiency Power Amplifiers for Modern Mobile Communications: The Load-Modulation Approach

et al. 2017

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Abstract:Modern mobile communication signals require power amplifiers able to maintain very high efficiency in a wide range of output power levels, which is a major issue for classical power amplifier architectures. Following the load-modulation approach, efficiency enhancement is achieved by dynamically changing the amplifier load impedance as a function of the input power. In this paper, a review of the widely-adopted Doherty power amplifier and of the other load-modulation efficiency enhancement techniques is presented. The main theoretical aspects behind each method are introduced, and the most relevant practical implementations available in recent literature are reported and discussed.

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“…It shows that even at mm-Wave the outphasing TX is able to perform linear amplification using switching or saturated power amplifiers (PAs), achieving nearly two times better average efficiency [6] than that of a conventional / TX. Therefore, it is essential to develop a highspeed outphasing modulator to facilitate a fully integrated outphasing TX [7,8]. The work in [9] presents an outphasing TX for 2.4-GHz WLAN with a delay-based phase modulator.…”

Section: Introductionmentioning

confidence: 99%

CORDIC‐Based Multi‐Gb/s Digital Outphasing Modulator for Highly Efficient Millimeter‐Wave Transmitters

Zhao

2018

Wireless Communications and Mobile Computing

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This paper describes a high-speed CORDIC-based digital outphasing modulator. Fixed-point Matlab model of the outphasing modulator is developed to evaluate the system performance and define the circuit design parameters. Design issues such as signal quantization error, delay mismatch, and phase overflowing are addressed to enable hardware implementation. The complete outphasing modulator is fully custom designed in 40 nm CMOS, which can be integrated in a millimeter-wave outphasing transmitter to enhance the system average efficiency. Tested with 10.56 Gb/s 64-QAM, this work achieves an EVM of 3.2% and fulfils the IEEE 802.11ad spectral mask requirements.

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Theory and Implementation of RF-Input <newline/>Outphasing Power Amplification

Cited by 61 publications

References 33 publications

A compact outphasing power amplifier with integrated reactive compensation

A compact outphasing power amplifier with integrated reactive compensation

High Efficiency Power Amplifiers for Modern Mobile Communications: The Load-Modulation Approach

CORDIC‐Based Multi‐Gb/s Digital Outphasing Modulator for Highly Efficient Millimeter‐Wave Transmitters

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