Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Islam AF"'
Publikováno v:
IEEE Access, Vol 11, Pp 97435-97444 (2023)
A wideband periodic leaky-wave antenna (LWA) is proposed in this paper. By using lossy dielectric material inside the wedge-like guide as medium for wave propagation, a leaky mode is excited and results in widening the bandwidth. For certain tangenti
Externí odkaz:
https://doaj.org/article/84607753222a4168ae1de37d64c5dc8d
Autor:
Campbell Aj, Gillespie Ld, Wardlaw D, Gillespie Wj, Staehelin Hb, Kavouras Sa, Cuoco A, Fielding Ra, Hulme Pa, Osborne Rh, Verschueren Sm, Whiteford J, Gunter K, Sellmeyer De, O’Neill Ef, Rubenstein Lz, Howe Te, Dick Im, Fiatarone Ma, Vanbillemont G, Barrett-Connor E, Orr R, de Vries Pj, Heaney Rp, Islam Af, Massey Lk, Mirwald Rl, Morton Sc, Kanis Ja, Hallstrom H, Dhaliwal S, Murray Gr, Claessens Al, Lyon Aw, Ebeling Pr, Shea B, Fenton Tr, Johnell O, Melby Mk, Robertson Mc, Chang Jt, Ackland T, Cummings, Liu Cj, Body Jj, Weaver Cm, Baxter-Jones Ad, Cameron Id, Carroll S, Yannakoulia M, Ferguson Sj, Poupin N, Bischoff-Ferrari Ha, Dawson Lj, Ryan Nd, Taes Y, LeBrasseur Nk, Bergmann P, Pilbrow L, Magkos F, Gardner Mm, Stone Kl, Delecluse C, Premaor Mo
Publikováno v:
Osteoporosis. :40-54
Publikováno v:
IEEE Access, Vol 10, Pp 90706-90714 (2022)
A compact ultra-wideband printed ridge gap waveguide directional couplers for millimeter-wave applications are presented in this paper. A multi-layer coupling technique between two resonant patches is adopted to achieve a wider operating bandwidth wi
Externí odkaz:
https://doaj.org/article/a162fc62b9574d18968bee1c24e9764e
Publikováno v:
IEEE Access, Vol 9, Pp 113393-113402 (2021)
The millimeter-wave (mm-wave) band is expected to be the optimal solution for future wireless communication systems as it provides a wide bandwidth, which enhancing data transmission rate. Therefore, high-directive antennas, principal elements for mm
Externí odkaz:
https://doaj.org/article/6416ce0ac78445a6892ed1ccc63f601d
Autor:
Islam Afifi, Abdel Razik Sebak
Publikováno v:
IEEE Access, Vol 8, Pp 78228-78235 (2020)
In this paper, a wideband 3 dB hybrid 180° rat-race coupler is introduced in the printed ridge gap waveguide technology. It has simultaneous wide matching and isolation bandwidth with low output amplitude imbalance. It operates in the millimeter wav
Externí odkaz:
https://doaj.org/article/cc726f12c35041078c423f5bf0741f7e
Publikováno v:
IEEE Access, Vol 8, Pp 80673-80683 (2020)
A wideband differential fed patch antenna with high cross-polarization discrimination is proposed at mm-wave range. For the purpose of increasing antenna bandwidth, capacitive coupling technique is used. Also, the differential feeding is utilized to
Externí odkaz:
https://doaj.org/article/225b9796d6244bf0ba2595b4d049c217
Autor:
Chris Kite, Ian M. Lahart, Islam Afzal, David R. Broom, Harpal Randeva, Ioannis Kyrou, James E. Brown
Publikováno v:
Systematic Reviews, Vol 8, Iss 1, Pp 1-28 (2019)
Abstract Background Typically, management of PCOS focuses on lifestyle changes (exercise and diet), aiming to alleviate symptoms, and lower the associated risk of type 2 diabetes and cardiovascular disease. Our objective was to analyse evidence on th
Externí odkaz:
https://doaj.org/article/97ae228a5b714afbb8c57306c5f952d4
Publikováno v:
IEEE Access, Vol 7, Pp 48185-48195 (2019)
A differential feeding for a cavity slot antenna is presented. The proposed feeding is based on a simple mechanism rather than the traditional complex networks that suffer from high losses. It is based on exciting the first higher order mode (TE10) o
Externí odkaz:
https://doaj.org/article/65ca9fe4c2e14e6bb87814fe7f1159b5
Publikováno v:
IEEE Access, Vol 7, Pp 52226-52237 (2019)
A broadband high-gain millimeter-wave (mmWave) array beamforming network (BFN) design, analysis, and implementation based on the Rotman lens antenna array feeding are presented. The BFN is intended for operation in the (26-40) GHz frequency band for
Externí odkaz:
https://doaj.org/article/bcfac41aa59b44edb10fbf88eda00fb3
Publikováno v:
Clinical Rehabilitation; Nov2014, Vol. 28 Issue 11, p1115-1124, 10p, 1 Diagram, 2 Charts, 1 Graph