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pro vyhledávání: '"David B. Davidson"'
Autor:
David B. Davidson
Publikováno v:
South African Journal of Science, Vol 108, Iss 1/2 (2012)
Externí odkaz:
https://doaj.org/article/5eacfb78a60142a190f67bf59e3c08c7
Autor:
David B. Davidson, Karl F. Warnick
Publikováno v:
Antenna and Array Technologies for Future Wireless Ecosystems. :285-303
Autor:
David B. Davidson
Publikováno v:
IEEE Transactions on Antennas and Propagation. 69:7073-7078
Convergence studies of the Method of Moments solution of thin wires have long been handicapped by the issue of conditional convergence: when the segment length approaches the wire radius, the approximations typically made result in exponentially dive
Publikováno v:
2022 International Conference on Electromagnetics in Advanced Applications (ICEAA).
Autor:
Daniel C. X. Ung, David B. Davidson
Publikováno v:
2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI).
Antenna array mutual impedances are measured from embedded element patterns. To do this practically, additional relationships are developed for Thevenin-driven embedded element patterns where the driven element has a different source impedance from t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60fb2f6a01b997f69544b137378aa380
https://doi.org/10.36227/techrxiv.19694797
https://doi.org/10.36227/techrxiv.19694797
Publikováno v:
IEEE Transactions on Antennas and Propagation. 69:1769-1774
Embedded element patterns (EEPs) depend on the loads attached to elements in an antenna array. When modeling antenna arrays, the loading condition used in numerically simulations may be different from the loads used in the operating environment. The
Autor:
David B Davidson, Daniel C X Ung
Publikováno v:
2022 16th European Conference on Antennas and Propagation (EuCAP).
Publikováno v:
Experimental Astronomy. 51:1-16
The new generation radio telescopes, such as the Square Kilometre Array (SKA) currently under construction, will use aperture array, technology for the low frequency regime. For SKA2, the second phase scheduled after the realization of SKA1, aperture
Publikováno v:
IEEE Transactions on Antennas and Propagation. 68:5395-5404
This paper presents a framework to compute the receiver noise temperature (Trcv) of two low-frequency radio telescopes, the Murchison Widefield Array (MWA) and the Engineering Development Array (EDA). The MWA was selected because it is the only opera