Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Scott F. Griffiths"'
Autor:
Douglas H. Werner, Joshua Pompeii, David Law, J. Daniel Binion, Pingjuan L. Werner, Sawyer D. Campbell, Ronald P. Jenkins, Colin A. Mussman, Scott F. Griffiths, Eric B. Whiting, Galestan Mackertich-Sengerdy, Ryan J. Chaky, Steven Parrish, Ryan J. Beneck
Publikováno v:
2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting.
A slotted waveguide antenna array (SWAA) has been optimized for high power microwave (HPM) applications in the L-band. Through the use of global optimization, the dimensions of the feed layer and radiating slots were fine-tuned to minimize S11 and el
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1edbed6a40bc896f8e2aac606fc8b85c
https://doi.org/10.1109/ieeeconf35879.2020.9330128
https://doi.org/10.1109/ieeeconf35879.2020.9330128
Autor:
Matthew L. Ketner, Joshua Pompeii, Danny Z. Zhu, Micah D. Gregory, Zachary C. P. O. Morgan, John D. Binion, Scott F. Griffiths, Pingjuan L. Werner, Cooper S. Cicero, John A. Easum, Clinton P. Scarborough, Douglas H. Werner, Jeremy A. Bossard
Publikováno v:
IEEE Transactions on Antennas and Propagation. 66:1545-1548
The design of an efficient, metamaterial-based reflector antenna capable of operation at high power is presented. Metamaterial unit cells are comprised of end-loaded dipoles (ELDs) with capacitive lumped elements at their center. Enhanced power handl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c727d08f75403b52378d10fc8a6265b7
https://doi.org/10.1109/tap.2017.2781151
https://doi.org/10.1109/tap.2017.2781151
Mitigating Field Enhancement in Metasurfaces and Metamaterials for High-Power Microwave Applications
Autor:
Pingjuan L. Werner, Matthew L. Ketner, Sawyer D. Campbell, Douglas H. Werner, Jeremy A. Bossard, Qi Wu, Scott F. Griffiths, Clinton P. Scarborough
Publikováno v:
IEEE Transactions on Antennas and Propagation. 64:5309-5319
Metasurfaces and metamaterials have been explored extensively in recent years for their ability to enable a variety of innovative microwave devices. However, because their exotic properties often arise from resonant structures, the large field enhanc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f9efd04317fb754719f0a5724499f5a
https://doi.org/10.1109/tap.2016.2623643
https://doi.org/10.1109/tap.2016.2623643
Autor:
Danny Z. Zhu, John D. Binion, Douglas H. Werner, Clinton P. Scarborough, Pingjuan L. Werner, J. Pompeii Joint, John A. Easum, Scott F. Griffiths, Micah D. Gregory
Publikováno v:
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting.
A metamaterial design that can rapidly reconfigure its reflection phase angle and safely operate under high incident field strengths is presented for use in a high power microwave (HPM) reflectarray system. The design offers switching between reflect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad07a7c433539abe502c46e493328e0a
https://doi.org/10.1109/apusncursinrsm.2017.8072561
https://doi.org/10.1109/apusncursinrsm.2017.8072561
Autor:
Clinton P. Scarborough, P.L. Werner, Scott F. Griffiths, Jeremy A. Bossard, Joshua Pompeii, Sawyer D. Campbell, Micah D. Gregory, Douglas H. Werner
Publikováno v:
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting.
Through the careful consideration of field enhancement observed in individual unit cells, metamaterials can be designed for use in high power microwave (HPM) applications. However, power handling considerations are only one aspect of any metamaterial
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f4d8b474dbb33a8c7a0f2d5cdeeeaeb
https://doi.org/10.1109/apusncursinrsm.2017.8072088
https://doi.org/10.1109/apusncursinrsm.2017.8072088
Autor:
Cooper S. Cicero, Matthew L. Ketner, Scott F. Griffiths, Douglas H. Werner, Micah D. Gregory, Jeremy A. Bossard, Clinton P. Scarborough, Pingjuan L. Werner
Publikováno v:
2016 IEEE International Symposium on Antennas and Propagation (APSURSI).
A tunable metasurface unit cell that is based on counter-rotating end-loaded dipole (ELD) elements is proposed for high-power reflector antennas. The metasurface is tuned by mechanically rotating the ELD elements and thus avoids the power handling li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d06881b7aed724566b169789489e9d8d
https://doi.org/10.1109/aps.2016.7696362
https://doi.org/10.1109/aps.2016.7696362
Autor:
Douglas H. Werner, John D. Binion, Jeremy A. Bossard, Cooper S. Cicero, P.L. Werner, Micah D. Gregory, Clinton P. Scarborough, Matthew L. Ketner, Scott F. Griffiths
Publikováno v:
2016 IEEE International Symposium on Antennas and Propagation (APSURSI).
A metamaterial design that can rapidly reconfigure its reflection phase angle and safely operate under high incident field strengths is presented for use in a high power microwave (HPM) reflectarray system. The design offers switching between three s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe37e6cc3b752e74b75d43595efaa41d
https://doi.org/10.1109/aps.2016.7696066
https://doi.org/10.1109/aps.2016.7696066
Autor:
John D. Binion, Jeremy A. Bossard, Cooper S. Cicero, Pingjuan L. Werner, Douglas H. Werner, Matthew L. Ketner, Zachary C. P. O. Morgan, Danny Z. Zhu, Scott F. Griffiths, Clinton P. Scarborough, Micah D. Gregory, John A. Easum
Publikováno v:
2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES).
Most often, transmission and reflection properties and geometrical constraints (such as size) are the sole considerations in metamaterials design. Typically, power handling is of little concern as most applications are very low power. Here, we consid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6c887b84f41d158bc81f75c05083872
https://doi.org/10.1109/ropaces.2016.7465319
https://doi.org/10.1109/ropaces.2016.7465319
Autor:
Matthew L. Ketner, Douglas H. Werner, Micah D. Gregory, Clinton P. Scarborough, Scott F. Griffiths, Cooper S. Cicero, Jeremy A. Bossard
Publikováno v:
2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting.
A metamaterial reflector antenna is designed for robustness under high-power operating conditions by synthesizing pixelized metasurface geometries with minimized maximum field enhancement factor (MFEF) using a binary genetic algorithm (GA) stochastic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0158b5b1dbfd38198aedca3518bde101
https://doi.org/10.1109/aps.2015.7304931
https://doi.org/10.1109/aps.2015.7304931
Autor:
Douglas H. Werner, Pingjuan L. Werner, Cooper S. Cicero, Micah D. Gregory, Matthew L. Ketner, Jeremy A. Bossard, Scott F. Griffiths, Zachary C. P. O. Morgan, Kenneth L. Morgan
Publikováno v:
2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting.
There are often discrepancies between the behavior of a metamaterial reflector unit cell in an infinitely periodic environment and in a non-ideal environment in which the reflection phase varies across a metamaterial reflector. This work considers th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00ba57fe5d7d9d9c4682fbface311439
https://doi.org/10.1109/aps.2015.7304981
https://doi.org/10.1109/aps.2015.7304981