Journal ArticleDOI
The Best of Both Worlds: The Dynamic Load-Modulation Power Amplifier
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TLDR
Although highly spectrally efficient, OFDM suffers from a large peak-to-average power ratio (PAPR), where the transmit signal peak envelope power can be 12 dB greater than the average value.Abstract:
Mobile data traffic is expected to triple between 2018 and 2021 [1]. To meet past and future growth targets in an increasingly limited electromagnetic spectrum, wireless communications systems have evolved at a staggering rate. Current mobile phone standards like 3rd Generation Partnership Project LTE and Wi-Fi exploit orthogonal frequencydivision multiplexing (OFDM) as a means of achieving the required wireless data rates. OFDM is also a potential candidate for future 5G services. Although highly spectrally efficient, OFDM suffers from a large peak-to-average power ratio (PAPR), where the transmit signal peak envelope power can be 12 dB greater than the average value.read more
Citations
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Proceedings ArticleDOI
A 28-GHz Passive Outphasing Load Modulator in 40-nm GaN
Cameron Hill,James F. Buckwalter +1 more
TL;DR: In this paper, a passive tunable matching network for load-modulation of a power amplifier (PA) is presented, where different real impedance transformations can be realized to optimize the loadline match of the PA for output power and/or efficiency.
Journal ArticleDOI
Analysis and Design of Broadband Outphasing Power Amplifier Based on Complex Combining Impedance
TL;DR: In this article , a complex combining method for designing wideband OPAs is presented, where complex combining impedance is adopted to compensate the frequency dispersion of the active load modulation in the OPA, leading to an extended bandwidth.
Journal ArticleDOI
Analysis and Design of Broadband Outphasing Power Amplifier Based on Complex Combining Impedance
TL;DR: In this paper , a complex combining method for designing wideband OPAs is presented, where complex combining impedance is adopted to compensate the frequency dispersion of the active load modulation in the OPA, leading to an extended bandwidth.
References
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Journal ArticleDOI
A New High Efficiency Power Amplifier for Modulated Waves
TL;DR: In this paper, a new form of linear power amplifier for modulated radio-frequency waves was introduced, which achieved a plate circuit efficiencies of sixty to sixty-five per cent independent of modulation.
Journal ArticleDOI
Single-Sideband Transmission by Envelope Elimination and Restoration
TL;DR: In this article, a new type of single-sideband transmitter is described, which does not require the use of linear radio-frequency amplifiers, and is especially suitable for high-power operation.
Journal ArticleDOI
A new high-efficiency power amplifier for modulated waves
TL;DR: The use of increasingly higher power levels in broadcasting in the last few years has attached new importance to the matter of more efficient operation of the high-power stages in radio transmitters and the resulting reductions in cost of power, size of high-voltage transformers and rectifier, and water cooling requirements, are of particular importance in transmitters having outputs of 50 kilowatts or more as discussed by the authors.
Proceedings ArticleDOI
High-efficiency linear amplification by dynamic load modulation
TL;DR: Load modulation is a new technique in which amplitude-modulated signals are produced with high efficiency by dynamic variation of the load impedance of the power amplifier as discussed by the authors, which is achieved by a T network with a pair of highvoltage MOSFETs that act as a voltage-variable capacitor.