Results 31 to 40 of about 16,741 (297)
Exact off-resonance near fields of small-size extended hemielliptic 2-D lenses illuminated by plane waves [PDF]
, 2009 The near fields of small-size extended hemielliptic lenses made of rexolite and isotropic quartz and illuminated by E- and H-polarized plane waves are studied.
Alexander I. Nosich +23 more
core +3 more sources
Experimental Test of a Two-dimensional Approximation for Dielectric Microcavities
, 2009 Open dielectric resonators of different shapes are widely used for the manufacture of microlasers. A precise determination of their resonance frequencies and widths is crucial for their design. Most microlasers have a flat cylindrical geometry, and a two-
A. Richter +12 more
core +1 more source
A singly fed rectangular dielectric resonator antenna with a wideband circular polarization [PDF]
, 2010 A rectangular dielectric resonator antenna (DRA) that is excited using an outer-fed square spiral strip has been studied theoretically and experimentally. Utilizing such excitation has provided a circular polarization over a broad bandwidth of ${sim 14}%$
Khamas, S.K., Sulaiman, M.I.
core +1 more source
IEEE Open Journal of Antennas and Propagation, 2023 The utilization of additive manufacturing (AM) to engineer the permittivity profile of dielectric resonator antennas (DRAs) is considered. For the first time, the capabilities of AM are exploited to create continuously swept permittivity profiles and ...
Simon P. Hehenberger +2 more
doaj +1 more source
Moment method analysis of an archimedean spiral printed on a layered dielectric sphere [PDF]
, 2008 A method of moments model is presented to analyze Archimedean spirals that are printed on a layered dielectric sphere. The model is derived assuming an arbitrary location of the spiral.
Khamas, S.K.
core +1 more source
Perforated dielectric resonator antennas
Electronics Letters, 2002 A dielectric resonator antenna (DRA) is formed by perforating a dielectric substrate with a lattice of holes. The performance of several perforated DRA prototypes is compared to a conventional DRA and the results demonstrate better gain and cross-polarisation levels.
A. Petosa, A. Ittipiboon, S. Thirakoune
openaire +1 more source
Cost-efficient modeling of antenna structures using Gradient Enhanced Kriging [PDF]
, 2015 Reliable yet fast surrogate models are indispensable in the design of contemporary antenna structures. Data-driven models, e.g., based on Gaussian Processes or support-vector regression, offer sufficient flexibility and speed, however, their setup cost ...
Bekasiewicz, A +5 more
core +2 more sources
Polarisation reconfigurable anisotropic dielectric resonator antenna. [PDF]
Sci RepAbstract A novel polarization reconfigurable anisotropic dielectric resonator antenna (ADRA) is presented utilizing a new modulation scheme to exploit the degree of freedom in the polarization domain. The ADRA comprises periodic assembly dielectric resonators with two different dielectrics constant, equal in size, a vertically positioned ...
Danesh S +5 more
europepmc +4 more sources
Broadbeam Cylindrical Dielectric Resonator Antenna
IEEE Access, 2019 A novel widebeam aperture-coupled cylindrical dielectric resonator antenna is proposed, which consists of multi-layered cylindrical ceramic disks joined together to achieve the required height.
Syeda H. H. Mashhadi +2 more
doaj +1 more source
Технічна інженерія, 2020 The characteristics of the horn antenna based on the foreign rectangular waveguide with partial dielectric filling (PDF) and the communication loop are considered.
N.M. Каrashchuk +4 more
doaj +1 more source