Results 161 to 170 of about 5,033,045 (217)
Prospective evaluation of spinal reflex excitability and perceived ankle instability following acute lateral ankle sprain in collegiate basketball players. [PDF]
BMC Sports Sci Med RehabilTerada M, Taniyama D, Isaka T.
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IEEE Microwave Magazine, 2006
In this article, we show that the Doherty amplifier is capable of delivering the stringent requirements of the base station power amplifiers. We explain the operation principles, including both linearity and efficiency improvements, and the basic circuit configuration of the amplifier.
Bumman Kim, Jangheon Kim, Ildu Kim
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In this article, we show that the Doherty amplifier is capable of delivering the stringent requirements of the base station power amplifiers. We explain the operation principles, including both linearity and efficiency improvements, and the basic circuit configuration of the amplifier.
Bumman Kim, Jangheon Kim, Ildu Kim
exaly +3 more sources
Designing a Doherty power amplifier
Melecon 2010 - 2010 15th IEEE Mediterranean Electrotechnical Conference, 2010 The aim of this paper is to present an easy and rigorous way to design a Doherty power amplifier (DPA) starting from the requirements of the wireless system, in which it has to be integrated. In particular, accounting for the value of the pick to average power ratio (PAPR) of the system, design guidelines will be given to correctly address each design ...
COLANTONIO, PAOLO +3 more
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Design of an E-band Doherty Power amplifier
2018 14th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME), 2018 This paper demonstrates the design of an E-band Doherty power amplifier (PA) based in an 130nm SiGe BiCMOS process. This design includes main and auxiliary amplifiers, lange coupler and a pre-amplifier. The designed power amplifier exhibits a saturated output power of 14.4 dBm and output referred P1dB of 11.7 dBm.
Ahamed, Raju +5 more
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Multiband Doherty RF power amplifier
IEEE Africon '11, 2011In 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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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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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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2009
The Doherty power amplifier (DPA) is hereby presented and described starting from the basic idea up to more advanced and state-of-art results and guidelines. The DPA historical aspect is also covered, describing the timeline of its evolution. Moreover, the reasons related to why this architecture, roughly 80 years after its invention, is still on its ...
COLANTONIO, PAOLO +3 more
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The Doherty power amplifier (DPA) is hereby presented and described starting from the basic idea up to more advanced and state-of-art results and guidelines. The DPA historical aspect is also covered, describing the timeline of its evolution. Moreover, the reasons related to why this architecture, roughly 80 years after its invention, is still on its ...
COLANTONIO, PAOLO +3 more
openaire +5 more sources
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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