13.56 MHz class E power amplifier with 94.6% efficiency and 31 watts output power for RF heating applications

Srimuang, Pattrawut; Puangngernmak, Nutdechatorn; Chalermwisutkul, Suramate

doi:10.1109/ecticon.2014.6839809

Cited by 21 publications

(6 citation statements)

References 11 publications

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“…Class-E/F PAs have received much attention as amplifiers for wireless power transmission systems due to their ease of use, heat dissipation, and simple structure. However, compared to other PAs, they are less efficient at utilizing high power and require switch elements with high breakdown voltages due to their high drain-source peak voltages [ 18 ]. Unlike Class-E/F PAs, the Class-D PAs have a lower output current as the load impedance increases.…”

Section: Class-d Power Amplifier Overviewmentioning

confidence: 99%

A 2.4 GHz Wide-Range CMOS Current-Mode Class-D PA with HD2 Suppression for Internet of Things Applications

Kim

2024

Sensors

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Short-range Internet of Things (IoT) sensor nodes operating at 2.4 GHz must provide ubiquitous wireless sensor networks (WSNs) with energy-efficient, wide-range output power (POUT). They must also be fully integrated on a single chip for wireless body area networks (WBANs) and wireless personal area networks (WPANs) using low-power Bluetooth (BLE) and Zigbee standards. The proposed fully integrated transmitter (TX) utilizes a digitally controllable current-mode class-D (CMCD) power amplifier (PA) with a second harmonic distortion (HD2) suppression to reduce VCO pulling in an integrated system while meeting harmonic limit regulations. The CMCD PA is divided into 7-bit slices that can be reconfigured between differential and single-ended topologies. Duty cycle distortion compensation is performed for HD2 suppression, and an HD2 rejection filter and a modified C-L-C low-pass filter (LPF) reduce HD2 further. Implemented in a 28 nm CMOS process, the TX achieves a wide POUT range of from 12.1 to −31 dBm and provides a maximum efficiency of 39.8% while consuming 41.1 mW at 12.1 dBm POUT. The calibrated HD2 level is −82.2 dBc at 9.93 dBm POUT, resulting in a transmitter figure of merit (TX_FoM) of −97.52 dB. Higher-order harmonic levels remain below −41.2 dBm even at 12.1 dBm POUT, meeting regulatory requirements.

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Section: Class-d Power Amplifier Overviewmentioning

confidence: 99%

A 2.4 GHz Wide-Range CMOS Current-Mode Class-D PA with HD2 Suppression for Internet of Things Applications

Kim

2024

Sensors

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“…Chen et al [30] and Srimuang et. al [67] used 25 V and 32 V drain voltages respectively in their previous works. However, that 32 V and 25 V DC were not practical as most of the smartphones today use 5 V with 2 A (10 W) for charging of the battery.…”

Section: Figure 7 Zvs and Zcs Current Voltage Waveformmentioning

confidence: 99%

A Critical Analysis of a Wireless Power Transmission (WPT) with an Improvement Method for a Non-Radiative WPT

Ali

Ramli

Nugroho

2020

IJEEI

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This paper describes the analysis of the wireless power transmission including recent progress in non-radiative wireless power transmission (WPT) and the improvement methods. Generally, the WPT transmitter side consists of a DC supply voltage source, inverter/power amplifier, transmitter impedance matching device (IMD), source resonator and primary coil. The WPT receiver meanwhile consists of the secondary coil, device resonator, receiver IMD, rectifier and load. In order to achieve an efficient WPT, the WPT transmitter must transmit energy with minimum loss at the receiver side. This setup can be achieved by employing the power amplifier (PA). In this paper, the power amplifier in wireless power transmission for portable devices was designed. A Class E power amplifier was proposed and designed to improve the WPT transmitter side. The effects of zero voltage and zero derivative voltage switching on PA with optimization method was also discussed.

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“…Since the power amplifier is located at the final stage of the transmitter, its efficiency influences the system's overall efficiency. PAs are found in the realization of the many microwaves and millimeter-wave systems including radar and antenna systems [2][3][4][5][6][7][8], cellular phones [9][10][11], electronic warfare [12,13], heating [14,15], and also many other applications that highlight the importance of such component. Due to the wide variety of PA applications, from wireless communication handsets to heating and electronic warfare, PA is designed and biased in a suitable class to satisfy the desired parameters.…”

Section: Introductionmentioning

confidence: 99%

Design and fabrication of a GaN HEMT power amplifier based on hidden Markov model for wireless applications

et al. 2023

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Improvement of power amplifier’s performance is the desired topic in communication systems. There are many efforts are made to provide good input and output matching, high efficiency, sufficient power gain and appropriate output power. This paper presents a power amplifier with optimized input and output matching networks. In the proposed approach, a new structure of the Hidden Markov Model with 20 hidden states is used for modeling the power amplifier. The widths and lengths of the microstrip lines in the input and output matching networks are defined as the parameters that the Hidden Markov Model should optimize. For validating our algorithm, a power amplifier has been realized based on a 10W GaN HEMT with part number CG2H40010F from the Cree corporation. Measurement results have shown a PAE higher than 50%, a Gain of about 14 dB, and input and output return losses lower than -10 dB over the frequency range of 1.8–2.5 GHz. The proposed PA can be used in wireless applications such as radar systems.

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13.56 MHz class E power amplifier with 94.6% efficiency and 31 watts output power for RF heating applications

Cited by 21 publications

References 11 publications

A 2.4 GHz Wide-Range CMOS Current-Mode Class-D PA with HD2 Suppression for Internet of Things Applications

A 2.4 GHz Wide-Range CMOS Current-Mode Class-D PA with HD2 Suppression for Internet of Things Applications

A Critical Analysis of a Wireless Power Transmission (WPT) with an Improvement Method for a Non-Radiative WPT

Design and fabrication of a GaN HEMT power amplifier based on hidden Markov model for wireless applications

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