Design of a Selective Filter based on 2D Photonic Crystals Materials

Two dimensional finite differences temporal domain (2D-FDTD) numerical simulations are performed in cartesian coordinate system to determine the dispersion diagrams of transverse electric (TE) of a two-dimension photonic crystal (PC) with triangular lattice. The aim of this work is to design a filter with maximum spectral response close to the frequency 1.55 μm. To achieve this frequency, selective filters PC are formed by combination of three waveguides W1K A wherein the air holes have of different normalized radii respectively r1/a=0.44, r2/a=0.288 and r3/a= 0.3292 (a: is the periodicity of the lattice with value 0.48 μm). Best response is obtained when we insert three small cylindrical cavities (with normalized radius of 0.17) between the two half-planes of photonic crystal strong lateral confinement

NEW DESIGN OF LEAKY WAVE ANTENNA BASED ON SIW TECHNOLOGY FOR BEAM STEERING

ABSTRACT This paper presents the results of an investigation of a new version of a leaky wave antenna that is based on a substrate integrated waveguide (SIW). The structure of SIW is composed of two rows of cylinders between metal plates; it can be easily produced by the standard method PCB" circuit" or LTCC method, the antenna is designed so that it can radiate in C-band. The direction of the main lobe of the antenna radiation pattern can be steered by changing the frequency in the band from backward direction to forward direction; the effect of increasing the number of slot arrays has also been analyzed to study the effect on radiation patterns. The numerical simulations have been performed using a commercial CST Microwave studio. KEY WORDS Leaky wave antenna, substrate integrated waveguide, slots, C-band, CST, moment's method

SUBSTRATE INTEGRATED WAVEGUIDE DESIGN USING THE TWO DIMENTIONNAL FINITE ELEMENT METHOD

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Miniaturized half‐mode SIW band‐pass filter design integrating dumbbell DGS cells

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