Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Bruce Veidt"'
Publikováno v:
IEEE Transactions on Antennas and Propagation. 70:2499-2509
We describe a new type of ultra-wideband feed antenna based on nested coaxial waveguides. The feed is for radio astronomy applications and covers two closely spaced bands: 400–800 MHz and 900–1800 MHz. New design techniques are described for a th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce62adfab40190099ebdca3a4fcd2b7e
https://doi.org/10.1109/tap.2021.3125423
https://doi.org/10.1109/tap.2021.3125423
Publikováno v:
2022 International Conference on Electromagnetics in Advanced Applications (ICEAA).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::328bbded4aff133e4bedf31b73cebcbe
https://doi.org/10.1109/iceaa49419.2022.9900055
https://doi.org/10.1109/iceaa49419.2022.9900055
Autor:
Sara Salem Hesari, Doug W. Henke, Vladimir Reshetov, Bruce Veidt, Alireza Seyfollahi, Nianhua Jiang, Lewis B. G. Knee
Publikováno v:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a1eb771f649a0ed2578d4a1e9f50f2c
https://doi.org/10.1117/12.2627870
https://doi.org/10.1117/12.2627870
Autor:
Doug W. Henke, Nianhua Jiang, Sara Salem Hesari, Alireza Seyfollahi, Bruce Veidt, Lewis B. G. Knee
Publikováno v:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53973181ab85c102cc1064e78224638c
https://doi.org/10.1117/12.2630537
https://doi.org/10.1117/12.2630537
Publikováno v:
2021 IEEE 19th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM).
A compact front-end design, including an axial-ring corrugated feed horn and a vacuum window, has been designed for a proposed ngVLA Band-5/ Q-band receiver. The electromagnetic performance, optical propagation, and mechanical analysis of the propose
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1732048eed0ad805eaf491c9358eea48
https://doi.org/10.1109/antem51107.2021.9518730
https://doi.org/10.1109/antem51107.2021.9518730
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 15:1719-1722
The University of Calgary and the National Research Council (NRC) of Canada are developing a low-noise ambient-temperature phased-array demonstrator for possible use in the Square Kilometer Array radio telescope. In December 2014, NRC made noise meas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a185e809ecb3b860a0696b6cc809772
https://doi.org/10.1109/lawp.2016.2528818
https://doi.org/10.1109/lawp.2016.2528818
Publikováno v:
2018 18th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM).
We are designing ultra-wideband feed antennas for radio astronomy using nested coaxial waveguide horns. A limitation of coaxial waveguide horns is their poor matching to free space, and thus high reflection coefficient. In this work, we use an iris m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9adf7dd852fe194a36de021fe94e06e1
https://doi.org/10.1109/antem.2018.8572876
https://doi.org/10.1109/antem.2018.8572876
Publikováno v:
2018 18th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM).
An automated system for measuring the sensitivity of microwave radiometers with a free-space input port is described. The Hot/Cold Test Facility (HCTF) exposes a test radiometer to two free-space loads: a hot load formed by ambient-temperature microw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a54f728eed83a8b2981ce34625359643
https://doi.org/10.1109/antem.2018.8572850
https://doi.org/10.1109/antem.2018.8572850
Publikováno v:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX.
Phased array feeds (PAFs) are an active research area in radio astronomy, as they offer potential advantages over traditional single-pixel feeds. Their key advantage is increased field of view and survey speed, however they also permit tailoring the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a11778510c400eb439937d2e3e55be0
https://doi.org/10.1117/12.2311504
https://doi.org/10.1117/12.2311504
Publikováno v:
12th European Conference on Antennas and Propagation (EuCAP 2018).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5363dac99a402814e4b0160184e0302
https://doi.org/10.1049/cp.2018.0913
https://doi.org/10.1049/cp.2018.0913