Analysis of Systematic Losses in Hybrid Envelope Tracking Modulators

Renaud, Luke; Baylon, Joseph; Gopal, Srinivasan; Hoque, Aminul; Heo, Deukhyoun

doi:10.1109/tcsi.2018.2883531

Cited by 8 publications

(2 citation statements)

References 12 publications

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“…Loss analysis for a signal with a Rayleigh amplitude distribution for an envelope amplifier with a combination of linear and switching channels is given in [ 20 ].…”

Section: Discussion: Aisq For Modern Telecommunication Signalsmentioning

confidence: 99%

Broadband and Efficient Envelope Amplifier for Envelope Elimination and Restoration/Envelope Tracking Higher-Efficiency Power Amplifiers

Varlamov

Nguyen

Grebennikov³

2022

Sensors

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Increasing the efficiency of transmitters, as the largest consumers of energy, is relevant for any wireless communication devices. For higher efficiency, a number of methods are used, including envelope tracking and envelope elimination and restoration. Increasing the bandwidth of used frequencies requires expanding envelope modulators bandwidth up to 250–500 MHz or more. The possibility of using amplifiers with input signal quantization (AISQ), as an alternative to the most common hybrid envelope tracking modulators, is considered. An approach has been developed for optimizing AISQ characteristics according to the criterion of minimum loss when amplifying modern telecommunication signals with Rayleigh envelope distribution. The optimal quantization levels are determined and the energy characteristics of AISQ are calculated. AISQ loss power is shown to decrease by 1.66 times with two-level quantization, by 2.4 times with three-level quantization, and by a factor of 3.0–3.7 for four–five quantization levels compared to a class B amplifier. With these parameters, AISQ becomes competitive with respect to hybrid envelope tracking modulators but does not have electromagnetic interference from the pulse width modulation (PWM) path.

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“…Loss analysis for a signal with a Rayleigh amplitude distribution for an envelope amplifier with a combination of linear and switching channels is given in [ 20 ].…”

Section: Discussion: Aisq For Modern Telecommunication Signalsmentioning

confidence: 99%

Broadband and Efficient Envelope Amplifier for Envelope Elimination and Restoration/Envelope Tracking Higher-Efficiency Power Amplifiers

Varlamov

Nguyen

Grebennikov³

2022

Sensors

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show abstract

“…Therefore, the performance of the designed power amplifier directly affects the performance of the entire system [1][2][3][4]. Up to now, envelope tracking technology (ET) [4][5][6][7] has been the main technology used to improve the efficiency of power amplifiers. The basic architecture of ET technology is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

A Maximum Efficiency-86% Hybrid Power Modulator for 5G New Radio(NR) Applications

et al. 2022

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A hybrid power modulator is presented for the radio frequency (RF) power amplifiers of 5th generation mobile communication technology (5G) new radio (NR) applications. A hybrid power modulator utilizing a two-level switching converter and a broadband and high-efficiency linear amplifier is presented. A further improvement in the efficiency of the circuit is achieved by using an optimized supply voltage of the two-level switching converters of 4.5 V. In this way, the overall efficiency is improved by more than 5% compared to using a 5 V supply voltage. The linear amplifier consists of four stages. In order to improve bandwidth and circuit stability, a compensation circuit is added to the linear amplifier that eliminates the poles of the main amplifier by introducing additional zeros, indirectly pushing the pole distribution out of the bandwidth. Using this approach, the linear amplifier achieves a 3-dB bandwidth of 180 MHz and an efficiency of 51%. The hybrid power modulator achieves a maximum output power of 2.4 W and an efficiency of 86% when tracking a 100 MHz 5G-NR signal under a 4 Ω load in a 180 nm CMOS package.

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Hierarchical Design Methodology and Optimization for Proximity Communication based Contactless 3D ThruChip Interface

Gopal

Heo

Karnik

2019

2019 International 3D Systems Integration Conference (3DIC)

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Analysis of Systematic Losses in Hybrid Envelope Tracking Modulators

Cited by 8 publications

References 12 publications

Broadband and Efficient Envelope Amplifier for Envelope Elimination and Restoration/Envelope Tracking Higher-Efficiency Power Amplifiers

Broadband and Efficient Envelope Amplifier for Envelope Elimination and Restoration/Envelope Tracking Higher-Efficiency Power Amplifiers

A Maximum Efficiency-86% Hybrid Power Modulator for 5G New Radio(NR) Applications

Hierarchical Design Methodology and Optimization for Proximity Communication based Contactless 3D ThruChip Interface

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