Design and nonlinear analysis of a dual-band Doherty power amplifier for ISM and LMDS applications

Taghian, Fatemeh; Abdipour, Abdolali; Mohammadi, Abbas; Roodaki, Parisa Momen

doi:10.1109/aemc.2011.6256883

Cited by 6 publications

(5 citation statements)

References 12 publications

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“…These new types of PAs can effectively improve the efficiency at the cost of higher nonlinear distortion. In communication systems, the nonlinear distortion in PAs can be corrected by linearization techniques [57][58][59][60]. In this paper, we restrict our discussions on classic Class A and Class B PAs, noting that the efficiency of Class AB PAs is between Class A and Class B.…”

Section: Calculation Of Pa Efficiencymentioning

confidence: 99%

Performance Tradeoff Analysis of Hybrid Signaling SWIPT Systems with Nonlinear Power Amplifiers

Chen

Wang

et al. 2021

Electronics

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Simultaneous wireless information and power transfer (SWIPT) is a promising technology to achieve wide-area energy transfer by sharing the same radio frequency (RF) signal and infrastructure of legacy wireless communication systems. To enlarge the effective range of energy transfer in practice, it is desirable to have a hybrid signaling SWIPT scheme, which combines a high-power multitone energy signal with a low-power broadband information signal. This paper presents a systematic study on the performance of hybrid signaling SWIPT systems with memoryless nonlinear transmitter power amplifiers (PAs). Using PA efficiency and signal-to-noise-and-distortion ratio (SNDR) as the metrics to measure the efficiency of energy transfer and information transmission, respectively, we derive the tradeoff between these two metrics for two PA classes, two nonlinear PA models, and two SNDR definitions. Our results reveal insights into the fundamental performance tradeoff inherent in SWIPT systems using hybrid signaling schemes.

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Section: Calculation Of Pa Efficiencymentioning

confidence: 99%

Performance Tradeoff Analysis of Hybrid Signaling SWIPT Systems with Nonlinear Power Amplifiers

Chen

Wang

et al. 2021

Electronics

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“…The usefulness of the 28 GHz band is limited, in particular, because of requirements applying to transmission between the user and the base station (the "upstream" link). The 28 GHz frequency band has been made available by the Federal Communications Commission (FCC) by reallocating the local multipoint block distribution service (LMDS) A1, which is 850 MHz wide and lies between 27.50 and 28.35 GHz bands [8][9][10].…”

Section: Frequency Range For Local Multipoint Distribution Servicementioning

confidence: 99%

“…The UMFUS bands are currently maintained and used by national mobile phone operators, innovative mobile phone companies, regional phone operators, and other organizations wishing to implement mobile networks or provide fixed wireless access (FWA) services [8][9][10].…”

Section: Frequency Range For Local Multipoint Distribution Servicementioning

confidence: 99%

Broadband Microstrip Antenna for 5G Wireless Systems Operating at 28 GHz

2020

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Communication systems have been driven towards the fifth generation (5G) due to the demands of compact, high speed, and large bandwidth systems. These types of radio communication systems require new and more efficient antenna designs. This article presents a new design solution of a broadband microstrip antenna intended for use in 5G systems. The proposed antenna has a central operating frequency of 28 GHz and can be used in the LMDS (local multipoint distribution service) frequency band. The dimensions of the antenna and its parameters have been calculated, simulated, and optimized using the FEKO software. The antenna has a compact structure with dimensions (6.2 × 8.4 × 1.57) mm. Rogers RT Duroid 5880 material was used as a substrate for the antenna construction, which has a dielectric coefficient of 2.2 and a thickness of 1.57 mm. The antenna described in the article is characterized by a low reflection coefficient of −22.51 dB, a high energy gain value of 3.6 dBi, a wide operating band of 5.57 GHz (19.89%), and high energy efficiency.

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“…At the same time, a switched capacitor is used because of its good performance in terms of linearity and efficiency. Another attempt targeting mm-wave was done by [54]. A simulation and detailed passive design are discussed in this paper for mm-wave: the lower band was 24 GHz and the upper bad was 28 GHz with a bandwidth of 1 GHz.…”

Section: Dual-band Design Improvementsmentioning

confidence: 99%

Recent Developments of Dual-Band Doherty Power Amplifiers for Upcoming Mobile Communications Systems

Abdulkhaleq

Yahya

McEwan³

et al. 2019

Electronics

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Power amplifiers in modern and future communications should be able to handle different modulation standards at different frequency bands, and in addition, to be compatible with the previous generations. This paper reviews the recent design techniques that have been used to operate dual-band amplifiers and in particular the Doherty amplifiers. Special attention is focused on the design methodologies used for power splitters, phase compensation networks, impedance inverter networks and impedance transformer networks of such power amplifier. The most important materials of the dual-band Doherty amplifier are highlighted and surveyed. The main problems and challenges covering dual-band design concepts are presented and discussed. In addition, improvement techniques to enhance such operations are also exploited. The study shows that the transistor parasitic has a great impact in the design of a dual-band amplifier, and reduction of the transforming ratio of the inverter simplifies the dual-band design. The offset line can be functionally replaced by a Π-network in dual-band design rather than T-network.

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Design and nonlinear analysis of a dual-band Doherty power amplifier for ISM and LMDS applications

Cited by 6 publications

References 12 publications

Performance Tradeoff Analysis of Hybrid Signaling SWIPT Systems with Nonlinear Power Amplifiers

Performance Tradeoff Analysis of Hybrid Signaling SWIPT Systems with Nonlinear Power Amplifiers

Broadband Microstrip Antenna for 5G Wireless Systems Operating at 28 GHz

Recent Developments of Dual-Band Doherty Power Amplifiers for Upcoming Mobile Communications Systems

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