Journal ArticleDOI
Two-dimensional microwave band-gap structures of different dielectric materials
TLDR
In this paper, the use of low dielectric constant materials to form two-dimensional microwave band-gap structures for achieving high gap-to-midgap ratio was reported.Abstract:
We report the use of low dielectric constant materials to form two-dimensional microwave band-gap structures for achieving high gap-to-midgap ratio. The variable parameters chosen are the lattice spacing and the geometric structure. The selected geometries are square and triangular and the materials chosen are PTFE (e = 2.1), PVC (e = 2.38) and glass (e = 5.5). Using the plane-wave expansion method, proper lattice spacing is selected for each structure and material. The observed experimental results are analyzed with the help of the theoretical predictionread more
Citations
More filters
Journal ArticleDOI
Experimental and Numerical Study of Sensitivity Improvement in Near-Field Probes Using Single-Negative Media
TL;DR: In this article, an experimental verification of the sensitivity improvement of evanescent-field probes using single-negative (SNG) metamaterials is presented, and the deviation in the phase of reflection coefficient due to the target is measured.
Journal ArticleDOI
Linearization of power amplifiers by second harmonics and fourth-order nonlinear signals
TL;DR: In this article, a single-stage power amplifier and two-way Doherty amplifier are linearized by the technique that uses second harmonics and fourth-order nonlinear signals.
Patent
Sandwich vehicle structure having integrated electromagnetic radiation pathways
Jason P. Bommer,Travis G. Olson +1 more
TL;DR: In this paper, the authors propose a sandwich vehicle structure that allows for the confined propagation of electromagnetic radiation within the sandwich vehicle, where the core is composed of a core medium and a plurality of spaced apart core members embedded in the core medium.
Journal ArticleDOI
Nonlinear properties of a graded-index photonic heterostructure
TL;DR: In this article, the optical properties of a one-dimensional (1D) photonic heterostructure with graded-index nonlinear materials are analyzed theoretically and the influence of the gradation profile of the nonlinear layers on the linear and nonlinear responses of the structure is analyzed.
Dissertation
Sensitivity Enhancement of Near Field Probes Using Negative Materials
TL;DR: In this paper, the effect of placing DNG and SNG layers between the near field probes and the targets is investigated theoretically, and it is shown using quantitative measures that the sensitivity can be increased using double negative and single negative (SNG) materials for a target in vacuum and for a buried target.
References
More filters
Journal ArticleDOI
Photon band structures: The plane-wave method
K. M. Leung,Y. F. Liu +1 more
TL;DR: The optimal volume- filling fraction of spheres for the creation of a gap in the photon density of states is found to vary substantially with the relative dielectric constant r, and this gap persists for r as small as 3.
Journal ArticleDOI
Large electromagnetic stop bands in metallodielectric photonic crystals
Elliott R. Brown,O. B. McMahon +1 more
TL;DR: In this paper, an electromagnetic stop band spanning about one octave is observed in a periodic structure consisting of a face-centered cubic Bravais lattice of metal spheres supported by a low-loss dielectric.
Journal ArticleDOI
Drilled alternating-layer three-dimensional photonic crystals having a full photonic band gap
TL;DR: In this paper, the authors proposed a three-dimensional photonic crystal structure having a wide full photonic band gap in the optical regime, which can be fabricated by an alternating-layer deposition and etching (drilling) process.
Journal ArticleDOI
Microwave measurements of the photonic band gap in a two-dimensional photonic crystal slab
TL;DR: In this article, the authors measured the photonic band gap in the transmission of microwaves through a two-dimensional photonic crystal slab, which was constructed by cementing acrylic rods in a hexagonal array to form rectangular stacks.
Journal ArticleDOI
Microwave measurements of the photonic bandgap in a two-dimensional photonic crystal slab
TL;DR: In this article, the authors measured the photonic bandgap in the transmission of microwaves through a two-dimensional photonic crystal slab, which was constructed by cementing acrylic rods in a hexagonal closed-packed array to form rectangular stacks.
Related Papers (5)
Dielectric Permittivity of Semiconductors with Narrow Forbidden Gap in the Long‐Wave Limit
D. I. Sheka,A. N. Korol +1 more