Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Sara Salem Hesari"'
Autor:
Sara Salem Hesari, Jens Bornemann
Publikováno v:
Applied Sciences, Vol 8, Iss 12, p 2625 (2018)
This paper describes a novel feed system for compact antipodal Vivaldi antenna arrays on a single layer of substrate integrated waveguide (SIW) by using SIW H-plane right-angled power dividers. The proposed antenna systems are composed of a Vivaldi a
Externí odkaz:
https://doaj.org/article/6c520f31f66749ddb867ae04c304e446
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 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS).
We present an improved axial ring feed horn using a logarithmic spiral flare opening and tapered groove geometry that is suitable for wide-angle feeding, as required for offset Gregorian telescopes. To enable a design with maximum aperture efficiency
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d0ba7d08399e931550f61e4005dc6a0
https://doi.org/10.23919/ursigass51995.2021.9560330
https://doi.org/10.23919/ursigass51995.2021.9560330
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
Autor:
Lewis B. G. Knee, Lynn Baker, Sara Salem Hesari, Alireza Seyfollahi, Dean Chalmers, Douglas Henke, Vladimir Reshetov, Jens Bornemann, Frank Jiang
Publikováno v:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X.
A compact front-end system is presented for a dual-linear polarization cryogenic Q-band receiver. This receiver will be used to demonstrate the high frequency performance of the Dish Verification Antenna 2 (DVA-2) composite reflector telescope betwee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::657c1916ee791c8b7c795a122b6241e8
https://doi.org/10.1117/12.2562751
https://doi.org/10.1117/12.2562751
Autor:
Sara Salem Hesari, Krzysztof Caputa
This paper identifies sources of EMI emissions of the SKA-mid Receiver Sampler for SKA frequency Bands 1 to 3 (RXS123) and describes the EMI test facilities and test process for the digitizer prototype. The RXS123 must satisfy very strict EMI radiati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7273ba57ae28147d036875dbe5f2ec3
https://doi.org/10.23919/usnc/ursi49741.2020.9321632
https://doi.org/10.23919/usnc/ursi49741.2020.9321632
Autor:
Sara Salem Hesari, Lewis B. G. Knee
Publikováno v:
2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium).
Three different feed horn antennas for radio astronomy applications are presented in this paper. Feed structures including Choked ring horn, conical corrugated horn, and exponentially shaped quad-ridged horn are designed and simulated. Circular waveg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89c830d969b30349dbcea4d288931e21
https://doi.org/10.23919/usnc/ursi49741.2020.9321636
https://doi.org/10.23919/usnc/ursi49741.2020.9321636
Autor:
Jens Bornemann, Sara Salem Hesari
Publikováno v:
IET Microwaves, Antennas & Propagation. 12:1620-1624
A K-band frequency-selective front-end system for monopulse tracking applications is presented on a single layer of a substrate-integrated waveguide (SIW). The circuit comprises an antenna array of two Vivaldi antennas, a frequency-selective power co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5359c5f0374932c21c89a1763f70b704
https://doi.org/10.1049/iet-map.2018.0035
https://doi.org/10.1049/iet-map.2018.0035
Autor:
Sara Salem Hesari, Jens Bornemann
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 16:2262-2265
A K-band endfire substrate integrated waveguide (SIW) circularly polarized (CP) antenna system on a single-layer printed-circuit board is proposed. A high-gain SIW H-plane horn and a Vivaldi antenna are developed to produce two orthogonal polarizatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f3ebb62dc4829a3e9645a118a70575c
https://doi.org/10.1109/lawp.2017.2713720
https://doi.org/10.1109/lawp.2017.2713720