A Wide-Bandwidth Digital Filterbank

1996 ◽  
Vol 160 ◽  
pp. 25-26
Author(s):  
R. S. Foster ◽  
P. S. Ray ◽  
S. C. Lundgren ◽  
D. C. Backer ◽  
M. R. Dexter ◽  
...  
Keyword(s):  
Dynamic Range ◽  
Complete System ◽  
Power Level ◽  
Input Power ◽  
Maximum Speed ◽  
Search Mode ◽  
Data Acquisition Software ◽  
System Clock ◽  
Penn State ◽  
The University

The Navy/Berkeley Pulsar Processor (NBPP) is a digital filterbank which is based on the successful Digital Filter Boards constructed for the University of California Coherent Dispersion Removal Processor (CDRP). One 9U VME crate holds a complete system with 96 channels × 2 polarizations. Running at maximum speed, the full crate will cover 1.8 MHz/channel = 172 MHz total bandwidth. Narrower bandwidths are available by running the system clock slower. The digitization has 4 bits of precision for good dynamic range and minimal quantization effects. The output data has variable time resolution; typically 50-100μs for search mode, and 2.4μs for timing mode. A flexible analog mixer/filter front end provides variable width filters, programmable attenuators, and input power level measurements, along with IF-to-baseband mixing and amplification capability. Data acquisition software running on a Sun Sparcstation-20 is based on software developed for controlling the Penn State Pulsar Machine (PSPM).

scholarly journals Self-Adaptive Rectenna with High Efficiency over a Wide Dynamic Range for RF Energy Harvesting Applications

2021 ◽  
pp. 67-75
Author(s):  
Eman M. Abdelhady ◽  
◽  
Hala M. Abdelkader ◽  
Amr A. Al-Awamry
Keyword(s):  
Power Distribution ◽  
Adaptive Design ◽  
High Efficiency ◽  
Dynamic Range ◽  
Power Level ◽  
Input Power ◽  
Distribution Method ◽  
High Input Power ◽  
Wide Range ◽  
Voltage Doubler

This paper presents a novel simple adaptive and efficient rectenna with automatic power distribution to achieve high radio frequency-direct current (RF-DC) power conversion efficiency (PCE) over a wide range of RF input power. This design employs two rectifier paths operating at low and high-power levels, respectively. Automatic power distribution method exploits the power-dependent input impedance of the rectifier and routes the RF input power into the assigned path according to the input power level. A distinctive enhancement in the rectifier dynamic range is achieved when dividing the high path power equally into two or more parallel diode cells, which helps the high path to camouflage the diode breakdown voltage in case of high input power level. The proposed adaptive design applies two different rectifier topologies, one by using shunt diode topology and the other by using voltage doubler topology at 2.45 GHz. Simulated PCE of this work is kept above 50% over a range of 25.1 dBm from -5.7 to 19.4 dBm of RF input power using shunt diode topology and over a range of 30 dBm from -6.3 to 23.7 dBm of RF input power using voltage doubler topology.

scholarly journals RF Small and large signal characterization of a 3D integrated GaN/RF-SOI SPST switch

2021 ◽  
pp. 1-6
Author(s):  
Frédéric Drillet ◽  
Jérôme Loraine ◽  
Hassan Saleh ◽  
Imene Lahbib ◽  
Brice Grandchamp ◽  
...  
Keyword(s):  
Power Level ◽  
Coplanar Waveguide ◽  
Average Power ◽  
Input Power ◽  
Capacitive Coupling ◽  
Rf Switch ◽  
Large Signal ◽  
Waveguide Transmission ◽  
Signal Characterization

Abstract This paper presents the radio frequency (RF) measurements of an SPST switch realized in gallium nitride (GaN)/RF-SOI technology compared to its GaN/silicon (Si) equivalent. The samples are built with an innovative 3D heterogeneous integration technique. The RF switch transistors are GaN-based and the substrate is RF-SOI. The insertion loss obtained is below 0.4 dB up to 30 GHz while being 1 dB lower than its GaN/Si equivalent. This difference comes from the vertical capacitive coupling reduction of the transistor to the substrate. This reduction is estimated to 59% based on a RC network model fitted to S-parameters measurements. In large signal, the linearity study of the substrate through coplanar waveguide transmission line characterization shows the reduction of the average power level of H2 and H3 of 30 dB up to 38 dBm of input power. The large signal characterization of the SPST shows no compression up to 38 dBm and the H2 and H3 rejection levels at 38 dBm are respectively, 68 and 75 dBc.

scholarly journals Quantum dot SOA input power
dynamic range improvement for
differential-phase encoded signals

2010 ◽  
Vol 18 (6) ◽  
pp. 6270 ◽  
Author(s):  
T. Vallaitis ◽  
R. Bonk ◽  
J. Guetlein ◽  
D. Hillerkuss ◽  
J. Li ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Dynamic Range ◽  
Input Power ◽  
Power Dynamic ◽  
Differential Phase

scholarly journals Stormwater Biofilter Media Performance Updates for WinSLAMM: Data Summary for Unit Process Components, Example Calculations and Model Use

2021 ◽  
Author(s):  
Robert E. Pitt ◽  
◽  
Shirley Clark ◽  
Redahegn Sileshi ◽  
J. Voorhees ◽  
...  
Keyword(s):  
Research Group ◽  
Field Research ◽  
White Paper ◽  
Specific Information ◽  
Unit Process ◽  
Wisconsin Department ◽  
Penn State ◽  
The Media ◽  
Maintenance Requirements ◽  
The University

This paper focuses on specific information needed to model various aspects of the pollutant retention processes in stormwater biofilters. Updates currently being incorporated in WinSLAMM (Source Loading and Management Model) are building on expanded data from laboratory and field research mostly conducted by Pitt’s research group at the University of Alabama, Tuscaloosa, by Dr. Shirley Clark’s research group at Penn State–Harrisburg, and the Wisconsin Department of Natural Resources and the U.S. Geological Survey (DNR/USGS). These processes and data can be used in manual calculations or other models. Extensive summaries of these data sources and associated statistical analyses, plus additional references, are included in an online white paper available at the PV & Assoc. website. These tests were conducted to provide the details needed for modeling the performance of biofilters, specifically focusing on: methods to predict treatment flow rates through the media; particulate and associated particulate bound pollutant retention for several particle sizes; maintenance requirements due to sediment clogging and pollutant breakthrough; and retention of filterable pollutants. This multiyear research program also examined issues not commonly described in the biofilter performance literature, such as failure due to excessive salt loadings on media having large amounts of fines, problems associated with compaction of the media, and leaching of previously captured material from the media.

scholarly journals International design collaboration and mentoring for tertiary students through Facebook

2012 ◽  
Vol 28 (5) ◽  
Author(s):  
Josh McCarthy
Keyword(s):  
United States ◽  
Digital Media ◽  
Undergraduate Students ◽  
The United States ◽  
State University ◽  
Postgraduate Students ◽  
Student Cohorts ◽  
Penn State ◽  
The University ◽  
Industry Professionals

<span>This study explores the efficacy of the online social networking site </span><em>Facebook</em><span>, for linking international digital media student cohorts through an e-mentoring scheme. It reports on the 2011 collaboration between the University of Adelaide in Australia, and Penn State University in the United States. Over one semester, twelve postgraduate students in Australia and ten undergraduate students in the United States took part in an online mentor scheme hosted by </span><em>Facebook</em><span>. Students were required to submit work-in-progress imagery each week to a series of galleries within the forum. Postgraduate students from Adelaide mentored the undergraduate students at Penn State, and in turn, staff and associated industry professionals mentored the Adelaide students. Interaction between the two student cohorts was consistently strong throughout the semester, and all parties benefitted from the collaboration. Students from Penn State University were able to receive guidance and critiques from more experienced peers, and responded positively to the continual feedback over the semester. Students from the University of Adelaide received support from three different groups: Penn State staff and associated professionals; local industry professionals and recent graduates; and peers from Penn State. The 2011 scheme highlighted the efficacy of </span><em>Facebook</em><span> as a host site for e-mentoring and strengthened the bond between the two collaborating institutions.</span>

scholarly journals Receiver Designs for Electronic Toll Collection Systems : A Survey

2020 ◽  
pp. 576-581
Author(s):  
Rarika Ravi ◽  
Anu Assis
Keyword(s):  
Dynamic Range ◽  
Supply Voltage ◽  
Automatic Gain Control ◽  
Power Level ◽  
Cmos Technology ◽  
Electronic Toll Collection ◽  
Chip Area ◽  
Advantages And Disadvantages ◽  
Digitally Controlled ◽  
Toll Collection

<p>This paper discusses about different receiver designs adopted so far for various electronic toll collection systems. A comparative analysis based on the discussions is also provided. It shows that each design has it's own advantages and disadvantages compared to others. The main aim of this paper is to identify the most suitable design. The researches shows that the receiver design described in the 5.8GHz digitally controlled DSRC receiver for Chinese electronic toll collection system is the most suitable one. Here all RF, IF blocks and digital baseband for on-chip automatic gain control, are integrated on an RF-SoC. The proposed digitally controlled LNA and mixer circuits are elaborated. The technology used is 0.13μm CMOS technology. The RF block occupies a chip area of 0.75mm2. It consumes 22mA under a 1.5V supply voltage. The bit error rate maintains better than 10-6, the input power level varies from -75dBm to -8dBm. This design provides a receiver sensitivity improvement of at least 25%, and a dynamic range enhancement of at least 12%.</p>

Learning Management Systems

2011 ◽  
pp. 1223-1230
Author(s):  
Diane Chapman
Keyword(s):  
New York ◽  
Liberal Arts ◽  
Educational Institutions ◽  
State University ◽  
Yale University ◽  
Cornell University ◽  
Penn State ◽  
Nontraditional Learning ◽  
The University ◽  
Learning Options

Formal university-based distance education has been around for over 100 years. For example, Cornell University established the Correspondence University in 1882, and Chautauqua College of Liberal Arts in New York was awarding degrees via correspondence courses in 1883 (Nasseh, 1997). Soon many other educational institutions, including the University of Chicago, Penn State University, Yale University, and John Hopkins University, were offering these nontraditional learning options for their students. Many institutions then moved to instructional telecommunications as the technology matured. With the entry of the personal computer into homes and workplaces in the 1980s, learning started to become more technology driven. But it was not until the 1990s, with the proliferation of the World Wide Web, that the concept of technology-enhanced education began to change drastically.

Introduction to Learning Management Systems

2011 ◽  
pp. 1280-1286 ◽  
Author(s):  
Diane D. Chapman
Keyword(s):  
New York ◽  
Liberal Arts ◽  
Educational Institutions ◽  
Traditional Learning ◽  
State University ◽  
Yale University ◽  
Cornell University ◽  
Johns Hopkins University ◽  
Penn State ◽  
The University

Formal university-based distance education has been around for over 100 years. For example, Cornell University established the Correspondence University in 1882, and Chautauqua College of Liberal Arts in New York was awarding degrees via correspondence courses in 1883 (Nasseh, 1997). Soon many other educational institutions, including the University of Chicago, Penn State University, Yale University, and Johns Hopkins University were offering these non-traditional learning options for their students. With the entry of the personal computer into homes and workplaces in the 1980s, learning started to become more technologydriven. However, it was not until the 1990s, with the proliferation of the World Wide Web, that the concept of technology-enhanced education began to change drastically.

Low loss, fully-printed, ferroelectric varactors for high-power impedance matching at low ISM band frequency

2019 ◽  
Vol 11 (7) ◽  
pp. 658-665
Author(s):  
Daniel Kienemund ◽  
Nicole Bohn ◽  
Thomas Fink ◽  
Mike Abrecht ◽  
Walter Bigler ◽  
...  
Keyword(s):  
High Power ◽  
Power Level ◽  
Impedance Matching ◽  
Input Power ◽  
Low Loss ◽  
Band Frequency ◽  
Power Matching ◽  
Metal Insulator Metal ◽  
Ferroelectric Varactors ◽  
Suppression Technique

AbstractLow loss, ferroelectric, fully-printed varactors for high-power matching applications are presented. Piezoelectric-induced acoustic resonances reduce the power handling capabilities of these varactors by lowering the Q-factor at the operational frequency of 13.56 MHz. Here, a quality factor of maximum 142 is achieved with an interference-based acoustic suppression approach utilizing double metal–insulator–metal structures. The varactors show a tunability of maximum 34% at 300 W of input power. At a power level of 1 kW, the acoustic suppression technique greatly reduces the dissipated power by 62% from 37 W of a previous design to 14.2 W. At this power level, the varactors remain tunable with maximum 18.2% and 200 V of biasing voltage.

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