Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Zachary Hays"'
Autor:
Ed Viveiros, Sarvin Rezayat, Christopher Kappelmann, Abigail Hedden, Zachary Hays, John Penn, Matthew Fellows, Robert J. Marks, Charles Baylis, Lucilia Lamers
Publikováno v:
IEEE Transactions on Aerospace and Electronic Systems. 55:160-169
Future radar transmitters will need to be able to quickly reconfigure their radio-frequency circuitry to change operating frequency and spectral output while maintaining high power-added efficiency (PAE). In this paper, fast tuning of a tunable-varac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3cb79313720bd29be62d14de205f23b8
https://doi.org/10.1109/taes.2018.2849198
https://doi.org/10.1109/taes.2018.2849198
Autor:
Joseph Barkate, Matthew Flachsbart, Zachary Hays, Matthew Fellows, Jennifer Barlow, Charles Baylis, Lawrence Cohen, Robert J. Marks
Publikováno v:
IEEE Transactions on Aerospace and Electronic Systems. 52:928-937
Reconfigurable adaptive amplifiers are expected to be a critical component of future adaptive and cognitive radar transmitters. This paper details an algorithm to simultaneously optimize input power and load reflection coefficient of a power amplifie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::efb41ae52019cc64c38a93e52e1337c2
https://doi.org/10.1109/taes.2015.150335
https://doi.org/10.1109/taes.2015.150335
Autor:
Ed Viveiros, Chris Kappelmann, Dimitrios Peroulis, Charles Baylis, Lucilia Hays, Zachary Hays, Abbas Semnani, Sarvin Rezayat
Publikováno v:
2018 IEEE/MTT-S International Microwave Symposium - IMS.
In the dynamic spectrum access paradigm, operating frequency and bandwidth are assigned in real time. Presently the S-band radar allocation is highly coveted for spectrum sharing with wireless communications. To share the band with wireless systems,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13ec4a69b702a31bd9f0462fe944ec51
https://doi.org/10.1109/mwsym.2018.8439251
https://doi.org/10.1109/mwsym.2018.8439251
Autor:
Christopher Kappelmann, Lucilia Hays, Zachary Hays, Edward Viveiros, Austin Egbert, Robert J. Marks, Charles Baylis
Publikováno v:
2018 Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS).
Frequency-agile wireless transmitters require tunable power amplifiers that can reconfigure to maximize gain, efficiency, and spectral performance at changing operating frequencies and spectral output requirements. However, stability of the amplifier
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03cda01a9fc45506d7332c08b4ebc6b0
https://doi.org/10.1109/wmcas.2018.8400651
https://doi.org/10.1109/wmcas.2018.8400651
Autor:
Robert J. Marks, Lucilia Hays, Charles Baylis, Zachary Hays, Edward Viveiros, Sarvin Rezayat, Dimitrios Peroulis, Abbas Semnani, Christopher Kappelmann, Mohammad Abu Khater
Publikováno v:
2018 IEEE Radar Conference (RadarConf18).
The design and implementation of a first generation evanescent-mode cavity impedance tuner for reconfigurable radar transmitters is presented. The impedance tuner is capable of handling 90 W of radio-frequency (RF) power. The tuner can be used as a r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61a71a7aaa18adfa0ed9cb74ccddbefa
https://doi.org/10.1109/radar.2018.8378607
https://doi.org/10.1109/radar.2018.8378607
Autor:
John Penn, Ed Viveiros, Abbas Semnani, Dimitrios Peroulis, Charles Baylis, Lucilia Lamers, Christopher Kappelmann, Mohammad Abu Khater, Zachary Hays
Publikováno v:
RWS
A fast interval-halving search is demonstrated that can be used to optimize power-amplifier load impedance in real-time with a high-power evanescent-mode cavity tuner, consisting of two evanescent-mode resonant cavities. The power-added efficiency is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d912e1e04fc59e9c64cbae7cb88c1433
https://doi.org/10.1109/rws.2018.8305003
https://doi.org/10.1109/rws.2018.8305003
Autor:
Eric Walden, Christopher Kappelmann, Robert J. Marks, Sarvin Rezayat, Ali M. Darwish, Zachary Hays, Ed Viveiros, John Penn, Austin Egbert, Matthew Fellows, Abigail Hedden, Charles Baylis, Lucilia Lamers
Publikováno v:
2017 IEEE 18th Wireless and Microwave Technology Conference (WAMICON).
For future adaptive radio and radar transmission in a dynamic spectrum access environment, the radio-frequency circuitry will be need to be reconfigurable to allow adjustment of the operating frequency and the transmission spectrum in a congested env
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6158c1cc65a3692e6331969c5255958
https://doi.org/10.1109/wamicon.2017.7930258
https://doi.org/10.1109/wamicon.2017.7930258
Autor:
Dimitrios Peroulis, Charles Baylis, Zachary Hays, Ed Viveiros, Abbas Semnani, Mohammad Abu Khater, Robert J. Marks
Publikováno v:
2017 Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS).
Fast tuning of a new evanescent-mode cavity tuner is demonstrated to optimize amplifier device power-added efficiency in simulations. The tuning is accomplished by adjusting the two resonant frequencies of the two-element tuner network with a modifie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e6aa45c0e700b03fb3d41646b8b47f6
https://doi.org/10.1109/wmcas.2017.8070702
https://doi.org/10.1109/wmcas.2017.8070702
Autor:
Charles Baylis, Lucilia Lamers, Sarvin Rezayat, Zachary Hays, John Penn, Ali M. Darwish, Christopher Kappelmann, Robert J. Marks, Abigail Hedden, Edward Viveiros, Matthew Fellows, Matthew Flachsbart, Jennifer Barlow
Publikováno v:
RWS
Fast load impedance tuning of a varactor diode matching network to maximize amplifier gain in real-time reconfigurable circuitry is demonstrated. A published tunable varactor-diode matching topology is designed for operation at 1.3 GHz to provide sig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee5044ec88e6465a72b4e46114e6c570
https://doi.org/10.1109/rws.2017.7885991
https://doi.org/10.1109/rws.2017.7885991
Publikováno v:
Justice Quarterly. 32:255-287
Homelessness is a persistent problem facing offenders returning to the community from prison. Many offenders were homeless prior to incarceration, and often return to homelessness after release. Additionally, the costs of incarceration have led polic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0194ffddbc3fc41c8cd09a5722b2b73a
https://doi.org/10.1080/07418825.2012.761720
https://doi.org/10.1080/07418825.2012.761720