Results 161 to 170 of about 1,717 (209)
Multiband Doherty RF power amplifier
IEEE Africon '11, 2011 In era of exploding energy consumption and thus equipment operating cost as well as the parallel environmental need to reduce the carbon footprint, energy efficient mobile radio is a very important issue and future challenge. Additionally, increased number of standards, frequency bands and applications require flexible and sustainable solutions.
Patrick Jueschke +5 more
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A 6W uneven doherty power amplifier in GaN technology
2007 European Microwave Conference, 2007 In this paper the design of a 6 W uneven GaN Doherty power amplifier is presented. The Doherty PA is designed to achieve high efficiency for modulated signals with high peak to average power ratio used in modern wireless communication systems. The Doherty amplifier has been designed using two equal sized GaN devices for the Main Class AB and Peaking ...
Markos, AZ +5 more
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Compact harmonic control network for Doherty power amplifier
Microwave and Optical Technology Letters, 2008 AbstractIn this contribution, an innovative design solution to realize small size Doherty power amplifier is presented. The idea consists in the realization of a unique output matching network for both carrier and peaking devices without losing the Doherty behavior.
COLANTONIO, PAOLO +3 more
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A Saturated Doherty Power Amplifier Based On Saturated Amplifier
IEEE Microwave and Wireless Components Letters, 2010 A saturated Doherty power amplifier (PA) based on the saturated PA tuned by the self-generated harmonic currents is presented. When driven with mobile WiMAX 1FA signal, this Doherty PA demonstrates high efficiency performance (average 57%) over the WiMAX band from 2.5 GHz to 2.7 GHz.
Kim, J, Son, J, Moon, J, Kim, B
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The Doherty Power Amplifier: Design strategy
2015 IEEE Thirty Fifth Central American and Panama Convention (CONCAPAN XXXV), 2015 This paper shows a proposal of methodology for designing Doherty Power Amplifiers (DPAs) with arbitrary output-back-off (OBO), main and peak devices. As a demonstration, a 7.5dB OBO DPA has been designed, using two devices from Cree Inc, and simulated in Advanced Design System 2014.
Jorge Julián Moreno-Rubio +1 more
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Voltage Mode Doherty Power Amplifier
IEEE Journal of Solid-State Circuits, 2017This paper presents a new wideband Doherty amplifier technique that can achieve high efficiency while maintaining excellent linearity. By modifying a “forgotten” topology originally proposed by Doherty, a new Doherty amplifier architecture is realized with two voltage mode power amplifiers (PAs) and transformers, thus eliminating a narrowband impedance
Voravit Vorapipat +2 more
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Broadband Doherty power amplifiers
2013 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications, 2013In this paper, the transformer-less load-modulated (TLLM) architecture for designing broadband Doherty amplifiers is presented. In this architecture, the quarter-wave impedance transformers of the Doherty amplifier are not used. As a result, the design will be much more compact and large operational bandwidths can be obtained.
Mohammadhassan Akbarpour +2 more
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2015 IEEE MTT-S International Microwave Symposium, 2015
The Doherty power amplifier (DPA) architecture, in various formats using different technologies, has been a very popular means of providing high conversion efficiencies from raw electrical power to sophisticated modulated RF and microwave signals ever since the requirements for very high power amplitude modulated (AM) radio transmitters in the mid-1930'
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The Doherty power amplifier (DPA) architecture, in various formats using different technologies, has been a very popular means of providing high conversion efficiencies from raw electrical power to sophisticated modulated RF and microwave signals ever since the requirements for very high power amplitude modulated (AM) radio transmitters in the mid-1930'
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A Wideband High-efficiency Doherty Power Amplifier for LTE
2023 33rd International Conference Radioelektronika (RADIOELEKTRONIKA), 2023This article describes a broadband Doherty power amplifier designed with a class AB and class C PA that is suitable for LTE Band-7 and Wi-Fi applications. The output matching network is theoretically analyzed, with emphasis on the effect of the auxiliary amplifier's non-ideal infinite output impedance on parasitic devices.
Kaan Koca +2 more
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Doherty CMOS power amplifiers for 5G technology
2017 24th IEEE International Conference on Electronics, Circuits and Systems (ICECS), 2017Currently, there is a large move towards 5G wireless technology beyond the existing, widely used 4G technology due to an increased use of smart devices, and multimedia content. 5G technology is expected to operate at high frequencies between 15 GHz and 100 Ghz opening up a new horizon for spectrum constrained future wireless communications.
Nourhan Elsayed +3 more
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