Dual-Mode CMOS Doherty LTE Power Amplifier With Symmetric Hybrid Transformer

Kaymaksüt, Ercan; Reynaert, Patrick

doi:10.1109/jssc.2015.2422819

Cited by 61 publications

(18 citation statements)

References 18 publications

(21 reference statements)

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“…[119] have designed the Doherty power amplifiers by invoking the different sizes of CMOS, but their PAEs both achieve 34%. Similarly, Takenaka et al[126], Kang et al[127] and Cho et al[128] have all implemented Indium gallium phosphide (InGaP) or Gallium Arsenide (GaAs) based heterojunction bipolar transistor (HBT) into their Doherty power amplifiers for the sake of further improving their PAEs.…”

mentioning

confidence: 99%

Integrated Data and Energy Communication Network: A Comprehensive Survey

Yang

Wen

et al. 2018

IEEE Commun. Surv. Tutorials

130

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In order to satisfy the power thirsty of communication devices in the imminent 5G era, wireless charging techniques have attracted much attention both from the academic and industrial communities. Although the inductive coupling and magnetic resonance based charging techniques are indeed capable of supplying energy in a wireless manner, they tend to restrict the freedom of movement. By contrast, RF signals are capable of supplying energy over distances, which are gradually inclining closer to our ultimate goal -charging anytime and anywhere. Furthermore, transmitters capable of emitting RF signals have been widely deployed, such as TV towers, cellular base stations and Wi-Fi access points. This communication infrastructure may indeed be employed also for wireless energy transfer (WET). Therefore, no extra investment in dedicated WET infrastructure is required. However, allowing RF signal based WET may impair the wireless information transfer (WIT) operating in the same spectrum. Hence, it is crucial to coordinate and balance WET and WIT for simultaneous wireless information and power transfer (SWIPT), which evolves to Integrated Data and Energy communication Networks (IDENs). To this end, a ubiquitous IDEN architecture is introduced by summarising its natural heterogeneity and by synthesising a diverse range of integrated WET and WIT scenarios. Then the inherent relationship between WET and WIT is revealed from an information theoretical perspective, which is followed by the critical appraisal of the hardware enabling techniques extracting energy from RF signals. Furthermore, the transceiver design, resource allocation and user scheduling as well as networking aspects are elaborated on. In a nutshell, this treatise can be used as a handbook for researchers and engineers, who are interested in enriching their knowledge base of IDENs and in putting this vision into practice.Index Terms-RF signals, wireless energy transfer (WET), wireless information transfer (WIT), simultaneous wireless information and power transfer (SWIPT), wireless powered communication networks (WPCNs), integrated data and energy communication networks (IDENs).an increasing research interest from both the electronic and communication engineering communities. C. Near-field Wireless Energy TransferAt the time of writing, resonant inductive coupling [35] and magnetic resonance coupling [36] emerge as flexible wireless charging options for electronic devices in the nearfield. Resonant inductive coupling based wireless charging relies on the magnetic coupling that delivers electrical energy between two coils tuned to resonate at the same frequency. This technique has already been commercialised for small electronic appliances [37], such as mobile phones, electric toothbrushes and smart watches etc. However, the coupling coils only support near-field wireless power transfer over a distance spanning from a few millimetres to a few centimetres [38], while achieving a power transfer efficiency as high as 56.7%, when operating at a frequency of 508 kHz [...

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confidence: 99%

Integrated Data and Energy Communication Network: A Comprehensive Survey

Yang

Wen

et al. 2018

IEEE Commun. Surv. Tutorials

130

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“…From the measured results, we successfully verify the feasibility of the proposed split cascode structure for RF CMOS power amplifier applications. One of the key components of wireless communications system is the power amplifier [1][2][3][4][5]. In particular, the linearity of the power amplifier becomes increasingly important to guarantee the high data rate of the sophisticated modern wireless communication systems [1][2][3].…”

Section: Received 17 June 2015mentioning

confidence: 99%

“…There has been tremendous growth in unlicensed national information infrastructure (U-NII) radio band applications, including WLAN (2.4 and 5 GHz), WiMAX (3.5 GHz), and also satellite network applications [1][2][3]. A microwave filter is an essential component in modern communication system; it usually requires compact size, low in-band insertion loss, and high out-of-band rejection skirts [4,5]. Planer microstrip bandpass filters (BPFs) have been attracting much attention among the different types of microwave filters because of their inherent light weight, low cost, and easy fabrication [6].…”

Section: Introductionmentioning

confidence: 99%

A CMOS power amplifier using a split cascode structure to enhance its efficiency

Sim

Kang

Park

2015

Micro & Optical Tech Letters

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In this study, we propose a simple technique to enhance the efficiency of RF CMOS power amplifiers in which a cascode structure is utilized. To increase the efficiency in the low‐output‐power region, we split a common gate transistor into two parts. For the low‐output‐power mode, one of the common gate transistors is turned off to reduce the amount of DC power consumed. To verify the feasibility of the proposed split cascode structure, we designed a 2.2‐GHz CMOS power amplifier using the 180‐nm RF CMOS process. With a WCDMA modulated signal, we obtain a maximum‐output power of 23.4 dBm with 20.8% power‐added efficiency (PAE). At an output power of 16 dBm, the PAE is enhanced by the mode change of the designed power amplifier. From the measured results, we successfully verify the feasibility of the proposed split cascode structure for RF CMOS power amplifier applications. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:309–312, 2016

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“…One solution for enhancing PA performance is a power combining technique . Besides increasing the output power, this technique has the additional advantage of allowing multi‐mode operation by turning off one side stage.…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8][9] One solution for enhancing PA performance is a power combining technique. [10][11][12][13][14][15] Besides increasing the output power, this technique has the additional advantage of allowing multi-mode operation by turning off one side stage. This creates two or more peaks for the output power and efficiency, so the performance of the low output power region can be increased, as shown in Figure 1.…”

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confidence: 99%

A study comparing current and voltage combining techniques for CMOS power amplifiers for WLAN applications

Park

Lee

Park

2019

Micro & Optical Tech Letters

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This article presents CMOS power amplifiers for WLAN applications. These power amplifiers use current and voltage combining techniques for simultaneous improvement of the output power and efficiency, respectively, and are analyzed to determine which technique is more suitable for WLAN applications. The power amplifiers are fabricated with a 180 nm CMOS process. Their performance is verified using an 802.11 g modulated signal with 64 QAM, 20 MHz of bandwidth, and 54‐Mbps at 2.7 GHz. The measurements of the current and voltage combining power amplifiers show about 21.9 and 21.8 dBm of average output power, respectively, at −25 dB error vector magnitude (EVM), and about 20.2 and 18 dBm of average output power, respectively, at −30 dB EVM for a commercial specification. In addition, the current combining PA is operated in a multi‐mode manner, which saves the power stage current about 225 mA of the power stage current at low power mode. No pre‐distortion technique is required and all components are integrated on the chip.

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Dual-Mode CMOS Doherty LTE Power Amplifier With Symmetric Hybrid Transformer

Cited by 61 publications

References 18 publications

Integrated Data and Energy Communication Network: A Comprehensive Survey

Integrated Data and Energy Communication Network: A Comprehensive Survey

A CMOS power amplifier using a split cascode structure to enhance its efficiency

A study comparing current and voltage combining techniques for CMOS power amplifiers for WLAN applications

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