Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Ahmed Akgiray"'
Autor:
Jacob W. Kooi, Melissa Soriano, James Bowen, Zubair Abdulla, Lorene Samoska, Andy K. Fung, Raju Manthena, Daniel Hoppe, Hamid Javadi, Timothy Crawford, Darren J. Hayton, Inmaculada Malo-Gomez, Juan Daniel Gallego-Puyol, Ahmed Akgiray, Bekari Gabritchidze, Kieran A. Cleary, Christopher Jacobs, Joseph Lazio
Publikováno v:
IEEE Journal of Microwaves, Vol 3, Iss 2, Pp 570-586 (2023)
Accurate measurement of angular positions on the sky requires a well-defined system of reference, something that in practice is realized by the International Celestial Reference Frame (ICRF) with observations of distant (typical redshift $\sim$1) Act
Externí odkaz:
https://doaj.org/article/b5ca83678ec34f78ae86ee483e60b504
Autor:
Dogancan Turt, Ahmed Akgiray
Publikováno v:
2021 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2cb34d9196447f671f0479749edc9e8
https://doi.org/10.1109/icramet53537.2021.9650475
https://doi.org/10.1109/icramet53537.2021.9650475
Autor:
Michael E. Barsky, James Bowen, Andy Fung, Raju Manthena, Steven Montanez, Melissa Soriano, Jacob Kooi, Lorene Samoska, Ahmed Akgiray, Daniel J. Hoppe, Xiaobing Mei, Richard Lai, Christopher S. Jacobs
Publikováno v:
2020 IEEE/MTT-S International Microwave Symposium (IMS).
We report a new result of a packaged low noise amplifier (LNA) module with wide bandwidth of 5 to 35 GHz and low noise temperature performance of 10 -18 K, while operated at 10 K ambient. The LNA used 3-stages of sub-50 nm gate length, 100% indium ch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d6b35947b53dc6617a753a1de899ad5
https://doi.org/10.1109/ims30576.2020.9224106
https://doi.org/10.1109/ims30576.2020.9224106
Autor:
Wasim Nawaz, Ahmed Akgiray
Publikováno v:
2019 Fifth International Electromagnetic Compatibility Conference (EMC Turkiye).
In modern radar and communication systems, high gain, high power capability and low-profile front-end antenna systems are frequently utilized. In this paper, a compact, lightweight, high reflection bandwidth and high gain slotted wave guide array ant
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1eba4a918b1ad0da323417fbe07018e8
https://doi.org/10.1109/emcturkiye45372.2019.8976024
https://doi.org/10.1109/emcturkiye45372.2019.8976024
Autor:
Joseph Lazio, Melissa Soriano, Ahmed Akgiray, James Bowen, Lorene Samoska, Sander Weinreb, Luis Ledezma, Jose Velazco
We have implemented a single wideband receiver package that could cover the 8 to 48 GHz frequency range of the ngVLA. The current JVLA covers this frequency range employing five distinct receiver packages. We estimate that reducing the number of rece
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78fb1a7a805b260178f01933f12391a7
https://resolver.caltech.edu/CaltechAUTHORS:20190710-160001424
https://resolver.caltech.edu/CaltechAUTHORS:20190710-160001424
Autor:
Peter Frijlink, Michel Renvoise, Ahmed Akgiray, Remy Leblanc, Richard Lai, Stephen Sarkozy, Sander Weinreb
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 61:3285-3297
The noise models of InP and GaAs HEMTs are compared with measurements at both 300 and 20 K. The critical parameter, Tdrain, in the Pospieszalski noise model is determined as a function of drain current by measurements of the 1-GHz noise of discrete t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18f0ee038b39b97a44fc413ebb171bfa
https://doi.org/10.1109/tmtt.2013.2273757
https://doi.org/10.1109/tmtt.2013.2273757
Publikováno v:
IEEE Transactions on Antennas and Propagation. 61:1099-1108
A circular quadruple-ridged flared horn achieving almost-constant beamwidth over 6:1 bandwidth is presented. This horn is the first demonstration of a wideband feed for radio telescopes which is capable of accommodating different reflector antenna op
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9672b8c7b790d15c086c3f520b095441
https://doi.org/10.1109/tap.2012.2229953
https://doi.org/10.1109/tap.2012.2229953
Autor:
Rodrigo Reeves, Charles R. Lawrence, Todd Gaier, Stephen Sarkozy, Kieran Cleary, Jacob Kooi, Anthony C. S. Readhead, Ahmed Akgiray, Sander Weinreb, Lorene Samoska, Pekka Kangaslahti, Richard Lai, Rohit Gawande, Andy Fung, Mikko Varonen
Due to copyright restrictions, the access to the full text of this article is only available via subscription. In this paper we discuss the design of low-noise amplifiers (LNAs) for both cryogenic and room-temperature operation in general and take th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::afeae784a3f37d37edc1a6a2bba77511
https://hdl.handle.net/10679/4445
https://hdl.handle.net/10679/4445
Publikováno v:
IEEE Transactions on Antennas and Propagation. 59:1954-1962
A wideband Radio Telescope was designed and built for use in the Goldstone Apple Valley Radio Telescope (GAVRT) program. It uses an existing 34-m antenna retrofitted with a tertiary offset mirror placed at the vertex of the main reflector. It can be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe88fe0ba99dbb7afc48ec0f56e21862
https://doi.org/10.1109/tap.2011.2123863
https://doi.org/10.1109/tap.2011.2123863
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 47:3347-3364
Characteristics of the Ku-band polarimetric scatterometer (POLSCAT) data acquired from five sets of aircraft flights in the winter months of 2006-2008 for the second Cold Land Processes Experiment (CLPX-II) in Colorado are described in this paper. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0f734ad50aa1838b07f52074a082a82
https://doi.org/10.1109/tgrs.2009.2022945
https://doi.org/10.1109/tgrs.2009.2022945