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Artykuły w czasopismach na temat "Doherty power amplifiers"

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Sajedin, Maryam, I. T. E. Elfergani, Jonathan Rodriguez, Raed Abd-Alhameed, and Monica Fernandez Barciela. "A Survey on RF and Microwave Doherty Power Amplifier for Mobile Handset Applications." Electronics 8, no. 6 (2019): 717. http://dx.doi.org/10.3390/electronics8060717.

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This survey addresses the cutting-edge load modulation microwave and radio frequency power amplifiers for next-generation wireless communication standards. The basic operational principle of the Doherty amplifier and its defective behavior that has been originated by transistor characteristics will be presented. Moreover, advance design architectures for enhancing the Doherty power amplifier’s performance in terms of higher efficiency and wider bandwidth characteristics, as well as the compact design techniques of Doherty amplifier that meets the requirements of legacy 5G handset applications,
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Shi, Weimin, and Songbai He. "Design of a Tri-Band Doherty Amplifier Based on Generalized Impedance Inverter." Journal of Circuits, Systems and Computers 28, no. 10 (2019): 1950170. http://dx.doi.org/10.1142/s0218126619501706.

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This paper introduces a methodology for implementing multi-band Doherty power amplifiers. Traditionally, a 90∘ impedance inverter line is required in Doherty architecture. In this contribution, a generalized impedance inverter line is utilized to construct multi-band Doherty power amplifiers. A tri-band Doherty power amplifier operating at 1.15, 1.85 and 2.55[Formula: see text]GHz is designed to validate the proposed method. Measurement results show the fabricated Doherty power amplifier achieves 6[Formula: see text]dB output back-off drain efficiencies of 62.3%, 49.3% and 50.5% at 1.15, 1.85
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Barmala, Ehsan. "Design and simulate a doherty power amplifier using GaAs technology for telecommunication applications." Indonesian Journal of Electrical Engineering and Computer Science 15, no. 2 (2019): 845. http://dx.doi.org/10.11591/ijeecs.v15.i2.pp845-854.

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<span>In this paper, a Doherty power amplifier was designed and simulated at 2.4 GHz central frequency which has high efficiency. A Doherty power amplifier is a way to increase the efficiency in the power amplifiers. OMMIC ED02AH technology and PHEMT transistors, which is made of gallium arsenide, have been used in this simulation. The Doherty power amplifier unique feature is its simple structure which is consisting of two parallel power amplifiers and transmission lines. In order to integrate the circuit, the Doherty power transmission amplifier lines were implemented using an inductor
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Choi, Hojong. "A Doherty Power Amplifier for Ultrasound Instrumentation." Sensors 23, no. 5 (2023): 2406. http://dx.doi.org/10.3390/s23052406.

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The ultrasound instrumentation uses linear power amplifiers with low power efficiency, generating unwanted heat and resulting in the deterioration of the echo signal quality of measured targets. Therefore, this study aims to develop a power amplifier scheme to increase power efficiency while maintaining appropriate echo signal quality. In communication systems, the Doherty power amplifier has shown relatively good power efficiency while producing high signal distortion. The same design scheme cannot be directly applied to ultrasound instrumentation. Therefore, the Doherty power amplifier needs
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Yan, Jonmei J., Paul Draxler, Calogero D. Presti, Donald F. Kimball, and Peter M. Asbeck. "Digital predistortion of envelope-tracking power amplifiers under average power back-off and long-term average power efficiency for base-station applications." International Journal of Microwave and Wireless Technologies 5, no. 2 (2013): 171–77. http://dx.doi.org/10.1017/s1759078713000147.

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In many base-station applications, the load/usage fluctuates over time periods of hours to days, thereby varying the required transmit power by as much as 10 dB. It is desirable to maintain high efficiency and linearity in the power amplifier under these back-off conditions in order to achieve high long-term efficiency. This paper demonstrates a scalable digital predistortion (DPD) approach that can be applied under different power back-off levels in envelope-tracking (ET) amplifiers and quantifies the associated efficiency. Efficiency comparisons are made with other amplifier configurations s
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Darraji, Ramzi, Pedram Mousavi, and Fadhel M. Ghannouchi. "Doherty Goes Digital: Digitally Enhanced Doherty Power Amplifiers." IEEE Microwave Magazine 17, no. 8 (2016): 41–51. http://dx.doi.org/10.1109/mmm.2016.2561478.

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McKnight, Ken, Ali Darwish, and Mona Zaghloul. "A Compact Output Power Combiner for Broadband Doherty Power Amplifiers." Electronics 8, no. 3 (2019): 275. http://dx.doi.org/10.3390/electronics8030275.

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A novel compact output power combiner for broadband Doherty Power Amplifiers is proposed in this paper. The proposed output power combiner avoids the use of quarter-wave impedance transformers as they are sizable and work over narrow bandwidths. Instead, the proposed combiner utilizes a distributed Brune Section to implement a compact broadband impedance inverter. The final area of the proposed output combiner is λ2/48. When compared to the conventional broadband Doherty structure, which has an approximate area of λ2/16, this structure offers an approximate size reduction of 67%. The proposed
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Parisi, Alessandro, Giuseppe Papotto, Claudio Nocera, Alessandro Castorina, and Giuseppe Palmisano. "A Ka-Band Doherty Power Amplifier in a 150 nm GaN-on-SiC Technology for 5G Applications." Electronics 12, no. 17 (2023): 3639. http://dx.doi.org/10.3390/electronics12173639.

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This paper presents a Ka-band three-stage power amplifier for 5G communications, which has been implemented in a 150 nm GaN-on-SiC technology and adopts a Doherty architecture. The amplifier is made up of a 50 Ω input buffer, which drives a power splitter, thanks to which it delivers its output power to the two power amplifier units of the Doherty topology, namely the main and auxiliary amplifier. Finally, the outputs of the two power amplifiers are properly arranged in a current combining scheme that enables the typical load modulation of the Doherty architecture, alongside allowing power com
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Santhanam, Suganthi, and Palavesam Selvan. "New Approach of Efficiency Improvement in 10 dB Doherty Power Amplifier for 4G LTE and 5G Wireless Applications." Applied Computational Electromagnetics Society 36, no. 4 (2021): 379–85. http://dx.doi.org/10.47037/2020.aces.j.360403.

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In this research article, the design procedure and comparative analysis of the 10 dB Doherty power amplifier (DPA) with single and double auxiliary amplifier for maximum efficiency has been presented. A new Doherty amplifier structure with parallel two auxiliary amplifiers based on conventional design having optimum value of load resistance of 3.162 ohm has been proposed with higher efficiency of 85.803% and analyzed with n-tone sinusoidal signal. The proposed Doherty power amplifier can achieve drain efficiency of 83.299% & with single and 85.803% with dual auxiliary amplifier at the outp
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Abdulkhaleq, Ahmed M., Maan A. Yahya, Neil McEwan, et al. "Recent Developments of Dual-Band Doherty Power Amplifiers for Upcoming Mobile Communications Systems." Electronics 8, no. 6 (2019): 638. http://dx.doi.org/10.3390/electronics8060638.

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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
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Rozprawy doktorskie na temat "Doherty power amplifiers"

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Brand, Konrad Frederik. "The experimental design and characterisation of Doherty power amplifiers." Thesis, Link to the online version, 2006. http://hdl.handle.net/10019.1/2594.

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Shao, Jin. "Advanced Power Amplifiers Design for Modern Wireless Communication." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc804973/.

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Modern wireless communication systems use spectrally efficient modulation schemes to reach high data rate transmission. These schemes are generally involved with signals with high peak-to-average power ratio (PAPR). Moreover, the development of next generation wireless communication systems requires the power amplifiers to operate over a wide frequency band or multiple frequency bands to support different applications. These wide-band and multi-band solutions will lead to reductions in both the size and cost of the whole system. This dissertation presents several advanced power amplifier solut
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Jansen, Roelof. "Evaluation of Doherty Amplifier Implementations." Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/20445.

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Thesis (MScIng)--Stellenbosch University, 2008.<br>ENGLISH ABSTRACT: Modern communication systems demand efficient, linear power amplifiers. The amplifiers are often operated in the backed-off power levels at which linear amplifiers such as class B amplifier are particularly inefficient. The Doherty amplifier provides an improvement as it increases efficiency at backed of power levels. Doherty amplifiers consists of two amplifiers, a carrier amplifier and a peaking amplifier, of which the output is combined in a novel way. Implementation of the Doherty amplifier with transistors is not id
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Barthwal, Ayushi. "Bandwidth and dynamic range extension of load modulation in doherty pa architecture." Thesis, IIT Delhi, 2019. http://eprint.iitd.ac.in:80//handle/2074/8049.

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Yahyavi, Mehran. "On the design of high-efficiency RF Doherty power amplifiers." Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/398236.

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Power amplifiers (PAs) are one of the most crucial elements in wireless standards becasue they are the most power hungry subsystems. These elements have to face an important issue, which is the power efficiency, a fact related with the output back-off (OBO). But the OBO depends on the kind of modulated signal, in proportion to the modulated signal peak-to-average power ratio (PAPR). The higuer is the data rate, the higer is the OBO, and consequently the lower is the efficiency. A low efficiency of PAs causes the waste of energy as heat. Furthermore, the trade-off between linearity and effic
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Viswanathan, Vani. "Efficiency Enhancement of Base Station Power Amplifiers Using Doherty Technique." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/9907.

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The power amplifiers are typically the most power-consuming block in wireless communication systems. Spectrum is expensive, and newer technologies demand transmission of maximum amount of data with minimum spectrum usage. This requires sophisticated modulation techniques, leading to wide, dynamic signals that require linear amplification. Although linear amplification is achievable, it always comes at the expense of efficiency. Most of the modern wireless applications such as WCDMA use non-constant envelope modulation techniques with a high peak to average ratio. Linearity being a critical iss
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Nunes, Luís Carlos Cótimos. "Nonlinear distortion generation mechanisms in Doherty amplifiers." Doctoral thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/15944.

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Doutoramento em Engenharia Electrotécnica<br>Nowadays, wireless communications systems demand for greater mobility and higher data rates. Moreover, the need for spectral efficiency requires the use of non-constant envelope modulation schemes. Hence, power amplifier designers have to build highly efficient, broadband and linear amplifiers. In order to fulfil these strict requirements, the practical Doherty amplifier seems to be the most promising technique. However, due to its complex operation, its nonlinear distortion generation mechanisms are not yet fully understood. Currently, only heurist
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Jang, Haedong. "NONLINEAR EMBEDDING FOR HIGH EFFICIENCY RF POWER AMPLIFIER DESIGN AND APPLICATION TO GENERALIZED ASYMMETRIC DOHERTY AMPLIFIERS." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406269587.

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Markos, Asdesach Zena. "Efficiency enhancement of linear GaN RF power amplifiers using the Doherty technique." Kassel Kassel Univ. Press, 2008. http://d-nb.info/99160427X/04.

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Baker, Bryant. "A 3.6 GHz Doherty Power Amplifier with a 40 dBm Saturated Output Power using GaN on SiC HEMT Devices." PDXScholar, 2014. https://pdxscholar.library.pdx.edu/open_access_etds/1781.

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This manuscript describes the design, development, and implementation of a linear high efficiency power amplifier. The symmetrical Doherty power amplifier utilizes TriQuint's 2nd Generation Gallium Nitride (GaN) on Silicon Carbide (SiC) High Electron Mobility Transistor (HEMT) devices (T1G6001032-SM) for a specified design frequency of 3.6 GHz and saturated output power of 40 dBm. Advanced Design Systems (ADS) simulation software, in conjunction with Modelithic's active and passive device models, were used during the design process and will be evaluated against the final measured results. The
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Książki na temat "Doherty power amplifiers"

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Doherty Power Amplifiers. Elsevier, 2018. http://dx.doi.org/10.1016/c2015-0-06808-3.

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Kim, Bumman. Doherty Power Amplifiers: From Fundamentals to Advanced Design Methods. Elsevier Science & Technology Books, 2018.

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Kim, Bumman. Doherty Power Amplifiers: From Fundamentals to Advanced Design Methods. Elsevier Science & Technology Books, 2018.

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Części książek na temat "Doherty power amplifiers"

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Wang, Hua. "Doherty Architecture for mm-wave/RF Digital and Analog Power Amplifiers." In IC Design Insights - from Selected Presentations at CICC 2017. River Publishers, 2022. http://dx.doi.org/10.1201/9781003338499-9.

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Sajedin, Maryam, Issa Elfergani, Abubakar Sadiq Hussaini, Jonathan Rodriguez, Ayman Radwan, and Raed Abd-Alhameed. "Design of Asymmetrical Doherty GaN HEMT Power Amplifiers for 4G Applications." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-05195-2_45.

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Zhang, Zhifan, Anna Piacibello, and Vittorio Camarchia. "Challenges of 9-dB Back-Off Doherty Power Amplifiers with 20% Fractional Bandwidth." In Lecture Notes in Electrical Engineering. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-71518-1_16.

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Elsayed, Nourhan, Hani Saleh, Baker Mohammad, Mohammed Ismail, and Mihai Sanduleanu. "Doherty Power Amplifier." In Analog Circuits and Signal Processing. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-92746-2_3.

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Pradeep, Deepa, and B. Ananda Venkatesan. "All-Digital RF Transmitter with Highly Power-Efficient Doherty Power Amplifier." In Lecture Notes in Electrical Engineering. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7251-2_3.

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Shahmordi, Mohammad, Sayyed-Hossein Javid-Hosseini, Vahid Nayyeri, Rocco Giofrè, and Paolo Colantonio. "A Broadband Doherty Power Amplifier for Sub-6 5G Applications." In Proceedings of SIE 2022. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-26066-7_11.

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Abdulkhaleq, Ahmed M., Yasir Al-Yasir, Naser Ojaroudi Parchin, et al. "A 70-W Asymmetrical Doherty Power Amplifier for 5G Base Stations." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-05195-2_44.

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Singh, Sukhpreet, and Paras Chawla. "A Highly Efficient and Broadband Doherty Power Amplifier Design for 5G Base Station." In Proceedings of International Conference on Data Science and Applications. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5120-5_16.

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Singh, Sukhpreet, Atul Babbar, Ahmed Alkhayyat, Ganesh Gupta, Sandeep Singh, and Jasgurpreet Singh Chohan. "High Performance RF Doherty Power Amplifier for Future Wireless Communication Applications—Review, Challenges, and Solutions." In Advances in Data and Information Sciences. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-6906-7_45.

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Kim, Bumman. "Introduction to Doherty Power Amplifier." In Doherty Power Amplifiers. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-12-809867-7.00001-6.

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Streszczenia konferencji na temat "Doherty power amplifiers"

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Fietta, Edoardo Baiesi, David Seebacher, Davide Ponton, and Andrea Bevilacqua. "On the Efficiency Enhancement of Voltage Mode Digital Doherty Power Amplifiers." In 2024 IEEE Nordic Circuits and Systems Conference (NorCAS). IEEE, 2024. http://dx.doi.org/10.1109/norcas64408.2024.10752466.

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Akbarpour, Mohammadhassan, Mohamed Helaoui, and Fadhel M. Ghannouchi. "Broadband Doherty power amplifiers." In 2013 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications (PAWR). IEEE, 2013. http://dx.doi.org/10.1109/pawr.2013.6490169.

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Kang, Daehyun, Daekyu Yu, Kyoungjoon Min, et al. "Class-AB/F Doherty Power Amplifiers." In 2008 38th European Microwave Conference (EuMC). IEEE, 2008. http://dx.doi.org/10.1109/eumc.2008.4751430.

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Shao, Jin, Rongguo Zhou, Han Ren, et al. "Design of broadband GaN doherty power amplifiers." In 2014 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications (PAWR). IEEE, 2014. http://dx.doi.org/10.1109/pawr.2014.6825728.

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Wang, Hua, Song Hu, and Shouhei Kousai. "Mixed-signal Doherty power amplifiers in CMOS." In 2016 IEEE/MTT-S International Microwave Symposium (IMS). IEEE, 2016. http://dx.doi.org/10.1109/mwsym.2016.7540207.

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Cahuana, Jessica Chani, Per Landin, David Gustafsson, Christian Fager, and Thomas Eriksson. "Linearization of dual-input Doherty power amplifiers." In 2014 International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMiC). IEEE, 2014. http://dx.doi.org/10.1109/inmmic.2014.6815085.

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Boumaiza, Slim, Hamed Golestaneh, Mehdi Naseri Ali Abadi, Ahmed M. M. Mohamed, and David Y. Wu. "Broadband Doherty power amplifiers: Advances and challenges." In 2014 IEEE 15th Annual IEEE Wireless and Microwave Technology Conference (WAMICON). IEEE, 2014. http://dx.doi.org/10.1109/wamicon.2014.6857793.

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Fares, Marie-Claude, David Yu-Ting Wu, Slim Boumaiza, and John Wood. "Inward nonlinear characterization of Doherty Power Amplifiers." In 2009 IEEE MTT-S International Microwave Symposium Digest (MTT). IEEE, 2009. http://dx.doi.org/10.1109/mwsym.2009.5166004.

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Piacibello, Anna, Ricardo Figueiredo, Vittorio Camarchia, Marco Pirola, and Nuno Borges Carvalho. "Linearity-aware design of Doherty power amplifiers." In 2019 IEEE MTT-S International Microwave Conference on Hardware and Systems for 5G and Beyond (IMC-5G). IEEE, 2019. http://dx.doi.org/10.1109/imc-5g47857.2019.9160390.

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Elsayed, Nourhan, Hani Saleh, Baker Mohammad, and Mohammed Ismail. "Doherty CMOS power amplifiers for 5G technology." In 2017 24th IEEE International Conference on Electronics, Circuits and Systems (ICECS). IEEE, 2017. http://dx.doi.org/10.1109/icecs.2017.8292114.

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Raporty organizacyjne na temat "Doherty power amplifiers"

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Baker, Bryant. A 3.6 GHz Doherty Power Amplifier with a 40 dBm Saturated Output Power using GaN on SiC HEMT Devices. Portland State University Library, 2000. http://dx.doi.org/10.15760/etd.1780.

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