Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Darko Kajfez"'
Publikováno v:
IET Microwaves, Antennas & Propagation, Vol 15, Iss 12, Pp 1529-1536 (2021)
Abstract A design procedure is described which enables simultaneous control of the input‐impedance match, directivity, and bandwidth of segmented antennas. Their impedance properties can be accurately determined by a straightforward multiport analy
Externí odkaz:
https://doaj.org/article/ad9f05d483cd42e89649836f0a9cfc7f
Publikováno v:
International Journal of Antennas and Propagation, Vol 2011 (2011)
The idea of using a cylindrical dielectric resonator antenna for mechanical direction finding and target tracking is presented. The hybrid feeding network of the receiving antenna comprised two ports: one for the broadside-type sum pattern and anothe
Externí odkaz:
https://doaj.org/article/b857465c4fa54677b180e8b82964f328
Publikováno v:
IET Microwaves, Antennas & Propagation, Vol 15, Iss 12, Pp 1529-1536 (2021)
A design procedure is described which enables simultaneous control of the input‐impedance match, directivity, and bandwidth of segmented antennas. Their impedance properties can be accurately determined by a straightforward multiport analysis, whic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8db9fe66f8303a61d315f8cd88a20257
https://doi.org/10.1049/mia2.12159
https://doi.org/10.1049/mia2.12159
Autor:
Darko Kajfez
Publikováno v:
Applied Computational Electromagnetics Society. 35:1105-1112
A frequently used Q factor measurement procedure consists of determining the values of the input reflection coefficient vs. frequency with the use of a network analyzer, and processing the measured values with a data-fitting procedure to evaluate the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e77f0a7ad638e14dde91489551554287
https://doi.org/10.47037/2020.aces.j.351001
https://doi.org/10.47037/2020.aces.j.351001
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 15:846-849
A square loop antenna of circumference about one free-space wavelength displays an omnidirectional radiation pattern when its conductor is partitioned into five segments that are interconnected by four small capacitances. The optimization process for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b324be6c5200f2226c75c686e14b44db
https://doi.org/10.1109/lawp.2015.2476665
https://doi.org/10.1109/lawp.2015.2476665
Autor:
Darko Kajfez, Atef Z. Elsherbeni
Publikováno v:
IEEE Antennas and Propagation Magazine. 55:154-162
Equivalent circuits containing frequency-variable radiation resistances are postulated for small monopole and small loop antennas above a ground plane. The equivalent circuits are valid below the first natural resonance frequency. By adding an extern
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48b606221b277578f93575ee87a18b2c
https://doi.org/10.1109/map.2013.6645158
https://doi.org/10.1109/map.2013.6645158
Publikováno v:
Progress In Electromagnetics Research B. 56:387-407
Some new focusing properties of time-domain ultra wide band (UWB) focusing array antennas are presented. The large current radiator (LCR) is considered as the UWB antenna element. Each LCR is replaced by a set of inflnitesimal dipoles modeling both t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31efdb1cfd27566c769fdcfee9b49143
https://doi.org/10.2528/pierb13080609
https://doi.org/10.2528/pierb13080609
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 11:1402-1405
A planar segmented circular loop antenna is designed for operation at 5.8 GHz with omnidirectional radiation pattern. This novel printed antenna, fabricated on a low-loss substrate, is composed of alternating top- and bottom-layer conducting segments
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4a4e5a72db1f37649da158f2aba1e8e
https://doi.org/10.1109/lawp.2012.2226862
https://doi.org/10.1109/lawp.2012.2226862
Publikováno v:
IEEE Transactions on Antennas and Propagation. 59:3112-3116
A very fast and efficient method for designing compact antenna arrays preserving the maximum channel capacity of multi input multi output (MIMO) systems using infinitesimal dipole model (IDM) theory is presented. Using this method each antenna elemen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eda2b55f6bcd3d071678c9b18f0ca27a
https://doi.org/10.1109/tap.2011.2158976
https://doi.org/10.1109/tap.2011.2158976
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 57:3404-3409
The use of whispering-gallery mode dielectric resonator (WGMDR) in the design of X -band five-way power divider is presented. Different excitation techniques are proposed to excite the higher order whispering-gallery H-polarized resonating mode such
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fca48e686ce4cc7603c8e1657b205214
https://doi.org/10.1109/tmtt.2009.2033884
https://doi.org/10.1109/tmtt.2009.2033884