An 18–38-GHz K-/Ka-Band Reconfigurable Chireix Outphasing GaAs MMIC Power Amplifier

Martin, Daniel; Falco, Paolo Enrico de; Roberg, Michael; Lasser, Gregor; Barton, Taylor W.

doi:10.1109/tmtt.2020.2992029

Cited by 12 publications

(9 citation statements)

References 41 publications

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“…where C 1 and C 2 are constants that do not depend on x, and ϕ is the phase of the voltage across the output load. It should be noted, that in the case r X = 0, the solution (12) coincides with the solution derived in [44]. The constants C 1 and C 2 can be defined from the initial conditions for the moment when x = π.…”

Section: A Peak Power Operation (Ideal Class-e Operation)supporting

confidence: 59%

“…Combined with nonconstant envelope input signal techniques and drain supply modulation, the outphasing PA can demonstrate high drain efficiency and power added efficiency (PAE) for wide range of output power levels [8]- [11]. Several techniques have been proposed in order to achieve broadband operation of outphasing PA [12]- [14]. All these features make the outphasing PA an attractive solution for efficient RF transmitters for the 5G communication systems.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Design of Outphasing Transmitter Using Class-E Power Amplifiers With Shunt Capacitances and Shunt Filters

et al. 2020

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In this paper, a novel outphasing power amplifier (PA) based on class-E amplifiers with shunt capacitances and shunt filters is proposed. The new design provides high drain efficiency for both peak and back-off power levels. A mathematical model for the class-E power amplifier with shunt capacitance and shunt filter is presented. The proposed model enables derivation of load circuit parameters that provide optimum drain efficiency for the peak and back-off power levels using closed form mathematical expressions. Based on this model, an outphasing power amplifier is designed and subsequently implemented using microstrip transmission lines and a GaN HEMT devices. The fabricated power amplifier prototype is optimized for 2.14 GHz and provides drain efficiency of over 60% for back-off power levels up to 8.5 dB. The amplifier demonstrates a 44.3% drain efficiency for 64QAM OFDM modulated signal with 20 MHz bandwidth. Adjacent channel leakage ratio (ACLR) of-39.5 dB and error vector magnitude (EVM) of 0.9 % were achieved after the application of a memory polynomial linearization algorithm.

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Section: A Peak Power Operation (Ideal Class-e Operation)supporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Analysis and Design of Outphasing Transmitter Using Class-E Power Amplifiers With Shunt Capacitances and Shunt Filters

et al. 2020

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“…Re-configurable Chireix reactive compensations are achieved at L-band and Ka-band in [18], [19]. These reconfigurable compensations are used to switch between frequency bands and achieve high bandwidth compared to the other methods.…”

Section: Outphasing With Non-isolated Combinersmentioning

confidence: 99%

“…These reconfigurable compensations are used to switch between frequency bands and achieve high bandwidth compared to the other methods. In [19], high bandwidth is obtained due to the use of coupled line structures instead of quarter-wave sections for combining.…”

Section: Outphasing With Non-isolated Combinersmentioning

confidence: 99%

Outphasing Methods for Beyond-5G Millimeter-Wave Base Station Applications

Versluis

Smolders

Bude

et al. 2021

2021 15th European Conference on Antennas and Propagation (EuCAP)

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“…Integrating two of those PAs with a series combiner and an impedance transformer, a 12.2 dB PAPR 10 MHz LTE signal was reproduced with an average efficiency above 45%. Due to the narrowband nature of the Chireix architecture, attention is being paid to multi-band or reconfigurable topologies [5]. Interest has also appeared on its combination with the Doherty technique [6] in order to achieve very high efficiency over a much larger OPBO range.…”

Section: Introductionmentioning

confidence: 99%

Outphasing Class-E/ F₂ Power Amplifier using a Quadrature Hybrid as Non-Isolating Combiner

Cordero

Ruiz

David

et al. 2021

2021 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR)

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This paper presents a GaN HEMT outphasing power amplifier (PA), based on a class-E/F2 topology with reduced sensitivity to variable resistive load operation, designed to provide output power control over an extended range with high efficiency. A 90-degree hybrid coupler is used as non-isolating combiner, incorporating an appropriate reactive termination on its fourth port. Besides its many intrinsic advantages, the mutual load modulation trajectories may be rotated by simply adjusting a capacitor value or alternatively the length of an open-circuited transmission line. Once implemented at UHF band, the outphasing PA provides a drain efficiency higher than 70% up to an output power 10 dB below its peak value (42.2 dBm).

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An 18–38-GHz K-/Ka-Band Reconfigurable Chireix Outphasing GaAs MMIC Power Amplifier

Cited by 12 publications

References 41 publications

Analysis and Design of Outphasing Transmitter Using Class-E Power Amplifiers With Shunt Capacitances and Shunt Filters

Analysis and Design of Outphasing Transmitter Using Class-E Power Amplifiers With Shunt Capacitances and Shunt Filters

Outphasing Methods for Beyond-5G Millimeter-Wave Base Station Applications

Outphasing Class-E/ F₂ Power Amplifier using a Quadrature Hybrid as Non-Isolating Combiner

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An 18–38-GHz K-/Ka-Band Reconfigurable Chireix Outphasing GaAs MMIC Power Amplifier

Cited by 12 publications

References 41 publications

Analysis and Design of Outphasing Transmitter Using Class-E Power Amplifiers With Shunt Capacitances and Shunt Filters

Analysis and Design of Outphasing Transmitter Using Class-E Power Amplifiers With Shunt Capacitances and Shunt Filters

Outphasing Methods for Beyond-5G Millimeter-Wave Base Station Applications

Outphasing Class-E/ F2 Power Amplifier using a Quadrature Hybrid as Non-Isolating Combiner

Contact Info

Product

Resources

About

Outphasing Class-E/ F₂ Power Amplifier using a Quadrature Hybrid as Non-Isolating Combiner