Journal ArticleDOI
Microwave Propagation in a Square Lattice Using Different Dielectric Materials for Device Applications
Reads0
Chats0
TLDR
In this article, the authors investigated the propagation of microwaves through the square lattice structure constructed by two different materials, glass (ϵ r = 5.5) and poly vinyl chloride (PVC) and reported the transmission spectra of these structures that were recorded between 7 and 20 GHz.Abstract:
This paper presents the investigation on the propagation of microwaves through the square lattice structure constructed by two different materials, glass (ϵ r = 5.5) and poly vinyl chloride (PVC) (ϵ r = 2.38). We report the transmission spectra of these structures that were recorded between 7 and 20 GHz. It is observed that the glass structure of lattice constant 1.4 cm gave a band gap centered around 17 GHz with a gap width of 3.5 GHz and attenuation of 30 dB. With PVC rods, the spectra were recorded for two different lattice constants 1.4 cm and 1.1 cm. The structure of 1.4 cm shows a band gap centered at 16.8 GHz with a gap width of 1.48 GHz where as the structure of 1.1 cm lattice constant shows a band gap centered at 11.17 GHz with a gap width of 2.67 GHz. The attenuation in both cases is around 25 dB. The analysis shows that the gap width is low for structures made of PVC rods when compared to structure made of glass as expected because of the low dielectric constant of PVC. It is also observed that...read more
Citations
More filters
Journal ArticleDOI
Dielectric matrices with air cavities as a waveguide photonic crystal
TL;DR: In this paper, the frequency dependences of the transmission coefficient of a microwave photonic crystal that represents a structure containing alternating layers of ceramic material (Al2O3) with a relatively large number of cavities and foam plastic are studied in the presence and absence of distortions of the periodicity of a photonic structure.
Journal ArticleDOI
Photonic crystal analysis for multiplexer and de-multiplexer applications
TL;DR: In this paper , the authors have made an investigation of several theoretical tools using the finite element method depending on the COMSOL MULTIPHYSICS program, for intuitive insight into the optical properties of the optical crystal.
References
More filters
Journal ArticleDOI
Inhibited Spontaneous Emission in Solid-State Physics and Electronics
TL;DR: If a three-dimensionally periodic dielectric structure has an electromagnetic band gap which overlaps the electronic band edge, then spontaneous emission can be rigorously forbidden.
Book
Photonic Crystals: Molding the Flow of Light
TL;DR: In this paper, the authors developed the theoretical tools of photonics using principles of linear algebra and symmetry, emphasizing analogies with traditional solid-state physics and quantum theory, and investigated the unique phenomena that take place within photonic crystals at defect sites and surfaces, from one to three dimensions.
Journal ArticleDOI
Donor and acceptor modes in photonic band structure.
Eli Yablonovitch,T. J. Gmitter,R. D. Meade,Andrew M. Rappe,K. D. Brommer,John D. Joannopoulos +5 more
TL;DR: Three-dimensionally periodic dielectric structures, photonic crystals, possessing a forbidden gap for electromagnetic wave propagation, a photonic band gap, are known, and it is now possible to make high-Q electromagnetic cavities of \ensuremath{\sim}1 cubic wavelength, for short wavelengths at which metallic cavities are useless.
Journal ArticleDOI
Photonic band structure: The face-centered-cubic case.
TL;DR: This work has identified one particular dielectric ``crystal'' which actually has a ``photonic band gap'' and requires a refractive index contrast greater than 3 to 1, which happens to be readily obtainable in semiconductor materials.