1,720,957 research outputs found
A 5.1–10.5 GHz SiGe BiCMOS Power Amplifier for 6GNR with 29 dBm PSAT and 40.1% PAE
No full textThis work presents a Watt-level 2-stage differential power amplifier (PA) implemented in a 130nm SiGe BiCMOS technology. The PA leverages a stacked topology to achieve large power over a wide bandwidth while employing only low-voltage high-speed bipolar devices and using a 3.3V supply. The measured small signal gain is 34.2 dB, with a 3 dB bandwidth ranging from 4 to 11 GHz, resulting in a large coverage of the 6G new radio (NR) FR3 spectrum. The saturated power is 29dBm with a peak power added efficiency larger than 40%. The PA is tested with a 5G NR-FR1 modulation, achieving 6.4% EVM and -33 dBc ACLR with 15.6% PAE at 21.5dBm average output power
Analysis and Design of a SiGe BiCMOS PA for 6G FR3 Band With 29-dBm PSAT and 40.1% PAE
No full textThis work presents a watt-level two-stage differential power amplifier (PA) implemented in a 130-nm SiGe BiCMOS technology. The PA leverages a stacked topology to achieve high power over a wide bandwidth while employing only low-voltage high-speed (HS) bipolar devices and using a 3.3-V supply. The measured small-signal gain is 34.2 dB, with a 3-dB bandwidth ranging from 4 to 11 GHz, covering a large portion of the sixth generation (6G) new radio (NR) FR3 spectrum. The PA is capable of delivering a measured peak saturated output power of 29 dBm without the need of power combining, leading to a compact area of 1.35 mm2 , including the pads. A peak power-added efficiency (PAE, PAEPEAK) larger than 40% is measured at 5 GHz. The PA is tested with a 5G NR-FR1 modulation, achieving 6.4% error vector magnitude (EVM) and -33-dBc adjacent channel leakage ratio (ACLR) with 15.6% of average PAE (PAEAVG) at 21.5 dBm of average output power (PAVG). When tested with the 100-MHz 256 QAM signal for 5G, the PA is compliant with the 5G NR-FR1 standard up to 20 dBm of PAVG
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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