Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Morteza Shahpari"'
Autor:
R. Baghlani, A. Nooraei Yeganeh, F. Mazlumi, Morteza Shahpari, R. Salimi Nejad, Hadi Aliakbarian, Sayed Hesamoddin Najmolhoda, M. Khak
Publikováno v:
Radioengineering. 2019 vol. 28, č. 1, s. 84-91. ISSN 1210-2512
Radioengineering, Vol 28, Iss 1, Pp 84-91 (2019)
Radioengineering, Vol 28, Iss 1, Pp 84-91 (2019)
In this paper, the design and fabrication of a large array antenna with three required, Sum, Difference and Control beams for a monopulse Secondary Surveillance Radar (SSR) is presented. A special array element, which is a high gain dual dipole struc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cc0f61bacc8d2b89955d7bc5b7c700fa
https://doi.org/10.13164/re.2019.0084
https://doi.org/10.13164/re.2019.0084
Publikováno v:
Microwave and Optical Technology Letters. 61:1747-1754
Graphene has excellent mechanical and conducting properties. Scattering parameter measurements were made in W‐band (75‐110 GHz) on 25 mm × 25 mm monolayer graphene film printed on polyethylene terephthalate (PET) substrate. From near field measu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4a933db8cab1cdd797938b2d8034382
https://doi.org/10.1002/mop.31826
https://doi.org/10.1002/mop.31826
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 18:462-466
The fundamental properties of carbon nanotube (CN) loop antennas have been determined using numerical modeling in both transmitting and receiving modes. The variation of the antenna impedance, reflection coefficient, radiation efficiency, Q- factor,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02243333c48e55fe36f341fb235ba289
https://doi.org/10.1109/lawp.2019.2894292
https://doi.org/10.1109/lawp.2019.2894292
Publikováno v:
2020 4th Australian Microwave Symposium (AMS).
A new method to measure the surface conductivity $\sigma_{s}$ of thin conductors has been recently proposed, that requires placement of a narrow strip inside a rectangular waveguide. Infinite series appear in the calculations required to extract $\si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0808bb3aa1723da11ceb0185ec43298e
https://doi.org/10.1109/ams48904.2020.9059362
https://doi.org/10.1109/ams48904.2020.9059362
Publikováno v:
2018 Australian Microwave Symposium (AMS).
Polyethylene teraphthalate (PET). Multiple reflections due to substrate-air interface and horn antenna(s) were eliminated using a time gated Fourier transformed pulse excitation. The graphene film on PET substrate increased the reflection (S 11 ) by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc11edfe3f40ed7a3247326e81fcce09
https://doi.org/10.1109/ausms.2018.8346983
https://doi.org/10.1109/ausms.2018.8346983
Autor:
David V. Thiel, Morteza Shahpari
Publikováno v:
IEEE Transactions on Antennas and Propagation. 63:4686-4692
Low cost methods of antenna production primarily aim to reduce the cost of metalization. This might lead to a reduction in conductivity. A systematic study on the impact of conductivity is presented. The efficiency, gain and bandwidth of cylindrical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d07e9303af446f363b9b372310c1455a
https://doi.org/10.1109/tap.2015.2479241
https://doi.org/10.1109/tap.2015.2479241
Publikováno v:
ICCS
This paper presents a generalised parametrisation as well as an approach to computational optimisation for small, planar antennas. A history of previous, more limited antenna optimisation techniques is discussed and a new parametrisation introduced i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::80f95ba38d3390314704e7f23574890c
https://doi.org/10.1016/j.procs.2015.05.394
https://doi.org/10.1016/j.procs.2015.05.394
Autor:
David V. Thiel, Morteza Shahpari
Publikováno v:
IEEE Transactions on Antennas and Propagation. 67:6229-6229
Recently, a fundamental limit for antenna radiation efficiency was proposed in [1] . Although valid for most antenna applications, a clarification is needed with regard to the fundamental limit expressed by [1 eqs. (14) and (15)] . This clarification
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67ac9fa647ad79039f48daf5b4316eb4
https://doi.org/10.1109/tap.2019.2925274
https://doi.org/10.1109/tap.2019.2925274
Publikováno v:
2016 International Conference on Electromagnetics in Advanced Applications (ICEAA).
The fundamental properties of carbon nanotube straight wire antennas were determined using theoretical and numerical modelling. The reflection coefficient, radiation efficiency and Q-factor have been reported using classical Hallen's-type integral eq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::787c881da0f00d7151e56c58e396afd5
https://doi.org/10.1109/iceaa.2016.7731526
https://doi.org/10.1109/iceaa.2016.7731526
Autor:
Morteza Shahpari
Publikováno v:
Electronics Letters. 53:1345-1346
The nature of the squint problem in the electrically tilted phased arrays (e.g. base transceiver station antennas) is explored based on the antenna theory and array theory. The antenna elements in the horizontal, vertical, or slant polarisations are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5dc4c68660cab1381c382d35c5809bdc
https://doi.org/10.1049/el.2017.1688
https://doi.org/10.1049/el.2017.1688