On the Design of Class-J Microwave Power Amplifier

Abdulhamid, Mohanad; Karugu, James; Farhan, Muaayed

doi:10.1515/sbeef-2019-0002

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…The Class-J PA presented in Ref. 20 designed with GaAs technology shows its linearity by delivering the OP1dB of 20 dBm that is almost nearer to the Psat of 21dBm similarly, the Class-JPA of this work delivers an OP1dB of 26.2 dBm that is almost nearer to the Psat of 27dBm to exhibits its linearity. A 130 nm CMOS-based 2-stage stacked Class-J PA delivers an OP1dB of 18 dBm, and a Psat of 20.2dBm with a max power gain of 15 dB is presented in Ref.…”

Section: Simulation Resultsmentioning

confidence: 52%

A low power, highly efficient, linear, enhanced wideband Class-J mode power amplifier for 5G applications

Sridhar

Senthilpari

Roslee

et al. 2022

Sci Rep

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In wireless communication networks, the necessity for high-speed data rates has increased in emerging 5G application areas. The Power Amplifier (PA) topologies reported to date achieved desired Power Added Efficiency (PAE) and linearity. However, these harmonically tuned switching PAs are less appealing for broadband applications as they are restricted to narrow bandwidth (BW). Therefore, to meet the 5G requirements, the challenge of designing a PA with improved efficiency and linearity for a dynamic range of BW becomes critical for PA designers. Recently developed Class-J PA topology can obtain good efficiency while maintaining linearity for wide BW applications. This research work presents a methodology to design a 5 GHz Class-J mode PA topology using Silterra 0.13 μm CMOS technology. This research's main objectives are to determine the Ropt of the transistor and design a proper Output Matching Network (OMN) for obtaining Class-J PA operation to make it suitable for 5G wireless applications. The simulation results represent that the designed Class-J PA provides 27 dBm of maximum power output with a maximum power gain of 13.7 dB and the small-signal gain of 17 dB for a BW of around 500 MHz with a 5 V power supply into a 50Ω load.

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Section: Simulation Resultsmentioning

confidence: 52%

A low power, highly efficient, linear, enhanced wideband Class-J mode power amplifier for 5G applications

Sridhar

Senthilpari

Roslee

et al. 2022

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Finally, the improved performance parameters of the proposed Class-J PA with L-type input and π-type output matching networks are compared with similar Class-J PAs in the literature. [30][31][32][33][34] As these PAs were designed at different frequencies and technologies, it is difficult to compare their performances. However, it can be noted that the Class-J PA design is proposed with a compact transmission line-based output matching network (OMN) in 30 that uses the same transistor technology (GaN) of this work to obtain broadband and highly efficient amplification and achieves a maximum drain efficiency of 75%.…”

Section: Discussionmentioning

confidence: 99%

“…Although our proposed PA is designed at different frequencies, its bandwidth is the same as that of this PA, and its transmission line-based M. Ns use a large chip area compared to the M. Ns of our work. A microwave Class-J PA for Wi-Fi IEEE802.11a Bluetooth applications designed with a methodology similar to that of this work in the same ADS EDA tool is presented in, 31 which uses a GaAs transistor as an active device but achieves a power output of 21 dBm and D. E of 69%. A fully integrated Class-J PA designed at 5 GHz for WLAN 802.11ax applications was presented in 32 that uses GaN on SiC technology with the same V dd=28 V to provide a maximum PAE of 55% and output power of 38 dBm, and it was mentioned that the performance of this PA can be enhanced further by employing DPD.…”

Section: Discussionmentioning

confidence: 99%

An enhanced broadband class-J mode power amplifier for 5G smart meter applications

et al. 2021

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Background: With the tremendous increase in the usage of smart meters for industrial/ household purposes, their implementation is considered a crucial challenge in the Internet of Things (IoT) world, leading to a demand for emerging 5G technology. In addition, a large amount of data has to be communicated by smart meters efficiently, which needs a significant enhancement in bandwidth. The power amplifier (PA) plays a major role in deciding the efficiency and bandwidth of the entire communication system. Among the various modes of PAs, a newly developed Class-J mode PA has been proven to achieve high efficiency over a wide bandwidth by maintaining linearity. Methods: This paper proposes a Class-J mode PA design methodology using a CGH40010F-GaN device that operates at a 3.5 GHz frequency to meet the requirements of 5G wireless communication technology for the replacement of existing 4G/LTE technology used for advanced metering infrastructure (AMI) in smart grids. This research's main objective is to design the proper matching networks (M.Ns) to achieve Class-J mode operation that satisfies the bandwidth requirements of 5G smart grid applications. With the target impedances obtained using the load-pull simulation, lumped element matching networks are analyzed and designed in 3 ways using the ADS EDA tool. Results: The simulation results reveal that the proposed Class-J PA provides a maximum drain efficiency (D.E) of 82%, power added efficiency (PAE) of 67% with 13 dB small-signal gain at 3.5 GHz, and output power of 40 dBm (41.4 dBm peak) with a power gain of approximately 7 dB over a bandwidth of approximately 400 MHz with a 28 V power supply into a 50 Ω load. Conclusion: The efficiency and bandwidth of the proposed Class-J PA can be enhanced further by fine-tuning the matching network design to make it more suitable for 5G smart meter/grid applications.

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Combiners/dividers systems of solid-state transmitting devices of modern radar systems

Pshenichkin¹,

Pjsc²,

Suchkov³

et al. 2020

T-Comm

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One of the most important components of the radar system, which determines its potential characteristics, is the transmitting device. It is known that the advantage of constructing transmitting devices based on the principle of coherent summation of the power of solid-state amplifier modules is that they allow obtaining the required output power level and ensuring the operation of the radar in the "smooth failure" mode with the possibility of prompt replacement of faulty amplifier modules during operation. At the same time, an urgent task is to increase the output power level of the transmitting device by reducing losses in its microwave path, caused by the spread of the amplitudes and phases of the summed signals. This article provides a brief overview of materials from open Russian and foreign sources on methods for summing the power of microwave oscillations, as well as possible ways to implement combiners/dividers of power of solid-state amplifying modules, on the basis of which the output stages of transmitting devices of modern radar systems are built. The advantages and disadvantages of Wilkinson combiners, waveguide traveling wave combiners, as well as problems arising in their development are discussed. The main issues related to increasing the efficiency when summing the power of several amplifying modules of the same type of the transmitting device are considered. It is shown that the choice of the summation/division scheme and its constructive implementation are determined by the range of operating frequencies, the output pulse and average power of the transmitting device, and the permissible weight and dimensions. The rationality of methods for obtaining the required output power in each specific case is analyzed, including the most promising ones based on special correction schemes that reduce the phase errors of the distribution-summing system.

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On the Design of Class-J Microwave Power Amplifier

Cited by 3 publications

References 7 publications

A low power, highly efficient, linear, enhanced wideband Class-J mode power amplifier for 5G applications

A low power, highly efficient, linear, enhanced wideband Class-J mode power amplifier for 5G applications

An enhanced broadband class-J mode power amplifier for 5G smart meter applications

Combiners/dividers systems of solid-state transmitting devices of modern radar systems

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