Results 31 to 40 of about 7,494 (288)
DESIGN AND FABRICATION OF ULTRA-WIDEBAND LEAKY WAVE METAMATERIAL ANTENNAS [PDF]
Jordanian Journal of Computers and Information Technology, 2019 This article is devoted to the design, analysis and fabrication of conventional and metamaterial leaky wave antennas. The effects of utilizing composite right/left handed structure on bandwidth, gain and beam steering are reflected.
Mohamed Fathy Abo Sree +5 more
doaj +1 more source
Leaky wave antenna for millimeter wave utilization
Journal of Physics: Conference Series, 2021 Abstract The simulation of planar periodic leaky-wave antenna for ultra-wideband application is introduced here. The antenna proposed here comprises 15 matched unit cells with high directivity which provides a backward to forward beam scanning range of 80° with frequency from 24.4GHz to 27.5GHz and has filtering capability making the ...
Ruchi Agarwal +3 more
openaire +1 more source
Leaky Horns: A New Paradigm of Developing Electromagnetic Horns Based on Leaky-Wave Structures
Electromagnetic ScienceMore than one-century history of microwaves has witnessed two seemingly unrelated developments of leaky-wave and horn antennas. While conventional horns cannot be made free from phase error even though the optimum horn criterion is adopted, this problem ...
Dongze Zheng, Ke Wu, Wei Hong
doaj +1 more source
Directive Emission from Defect-Free Dodecagonal Photonic Quasicrystals: A Leaky-Wave Characterization [PDF]
, 2009 In this paper, we study the radiation from embedded sources in two-dimensional finite-size "photonic-quasicrystal" (PQC) slabs made of dielectric rods arranged according to a 12-fold symmetric aperiodic tiling.
Capolino, Filippo +6 more
core +3 more sources
Mixer-Duplexer-Antenna Leaky-Wave System Based on Periodic Space-Time Modulation
, 2016 We present a mixer-duplexer-antenna leaky-wave system based on periodic space-time modulation. This system operates as a full transceiver, where the upconversion and downconversion mixing operations are accomplished via space-time transitions, the ...
Caloz, Christophe, Taravati, Sajjad
core +1 more source
INPUT IMPEDANCE OF PLANAR FP AND EBG ANTENNAS [PDF]
, 2007 International audienceThe theoretical study of the input impedance for Fabry-Perot (FP), Electromagnetic Band Gap (EBG) or Leaky Wave (LW) antennas is a real challenge from mathematical and electromagnetic modelling point of view and is very rarely ...
Collardey, Sylvain +3 more
core +4 more sources
Flexible Design of Broadside-Radiating Linearly-Polarized Edge-Fed Metasurface Antennas
IEEE AccessIn this work, we design and fabricate broadside-radiating edge-fed metasurface antennas with linear polarization employing a spatially-varying isotropic reactance; in order to avoid losses, the antenna is not terminated on a matched load.
Lucia Teodorani +4 more
doaj +1 more source
Tomorrow's Metamaterials: Manipulation of Electromagnetic Waves in Space, Time and Spacetime
, 2016 Metamaterials represent one of the most vibrant fields of modern science and technology. They are generally dispersive structures in the direct and reciprocal space and time domains.
Caloz, Christophe
core +1 more source
, 2017 The paper demonstrates that double unit-cell asymmetry in periodic leaky-wave antennas (P-LWAs), i.e. asymmetry with respect to both the longitudinal and transversal axes of the structure -- or longitudinal asymmetry (LA) and transversal asymmetry (TA) --
Al-Bassam, Amar +3 more
core +1 more source
General Mapping between Complex Spatial and Temporal Frequencies by Analytical Continuation
, 2020 This paper introduces a general technique for inter-mapping the complex spatial frequency (or propagation constant) $\gamma=\alpha+j\beta$ and the temporal frequency $\omega = \omega_\text{r}+j\omega_\text{i}$ of an arbitrary electromagnetic structure ...
Caloz, Christophe, Dehmollaian, Mojtaba
core +2 more sources