Double Frequency Filtering by Photonic Comb-Like

Ben-Ali, Youssef; Tahri, Zakaria; Ouariach, Abdelaziz; Bria, Driss

doi:10.1109/isaect.2018.8618798

Cited by 20 publications

(13 citation statements)

References 23 publications

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“…In recent years, one-dimensional electromagnetic star waveguides structures (SWGs) have attracted close attention of several researchers. This is associated with wide possibilities of their practical use in the creation of numerous devices to guide, control, and manipulates electromagnetic waves in various frequencies ranges [11][12][13][14]. These wired SWGs systems based on coaxial cables are composed of periodicity of cells, and each cell is constituted by segments and grafted in each site by a finite number of resonators.…”

Section: Introductionmentioning

confidence: 99%

High Quality Factor Microwave Multichannel Filter Based on Multi-Defectives Resonators Inserted in Periodic Star Waveguides Structure

Ben-Ali¹,

Kadmiri²,

Tahri³

et al. 2020

PIER C

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The transmission spectrum of electromagnetic waves through a one-dimensional photonic star waveguides (SWGs) structure is obtained using the Green function method (GFM). The proposed structure is composed of a finite number of periodic cells; each cell contains a segment of length d 1 grafted in its extremity by resonators of length d 2. This periodic system is altercated by insertion of defects resonators located in three different sites which have lengths d 02 , d 04 , and d 06 different from that of the perfect resonators. The properties of such a multi-defects structure are suitable for tunable very narrow band multichannel filter applications in microwave domain. The perfect photonic structure demonstrates large microwave photonic band gaps (PBGs) in which the propagation of electromagnetic waves is prohibited. For the sake of comparison, we first introduce single defect resonators located in one site; this defect creates hence two transmission peaks (defect modes) in the gaps. These induced modes of noticeable transmissions and good quality factors permit our proposed SWGs to behave like a single narrow band channel filter. Several localized modes appear in the band gaps when we introduce three resonators defects of different lengths and located in three different sites. With an appropriate choice of the geometrical parameters d 1 = 1 m, d 2 = 0.5 m, d 02 = d 04 = d 06 = 2 m, our thrice defectives system can create, in the microwave frequencies range, till eight transmission peaks in the gaps when the defects are located in three consecutive sites. These peaks have very high values of transmission rates and important quality factors reaching Q = 610000. Therefore, our proposed system acts as very narrow band multichannel filters for which defects modes shift towards the low frequencies when the defects resonators lengths increase. The results obtained demonstrate the dependence of the defect modes frequencies, transmission coefficient, and the quality factor on the resonators defects lengths, their numbers, and their positions inside the defective structure.

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Section: Introductionmentioning

confidence: 99%

High Quality Factor Microwave Multichannel Filter Based on Multi-Defectives Resonators Inserted in Periodic Star Waveguides Structure

Ben-Ali¹,

Kadmiri²,

Tahri³

et al. 2020

PIER C

Self Cite

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“…The latter originates both from the periodicity of the structure, related to the length d 1 , and from the resonant behavior of the lateral branches, related to the length d 2 . In particular, the resonators give rise to zeros of transmission through the waveguide at frequencies such that cos(ωd 2 √ ε 1 /c) [27]. Fig.…”

Section: Electromagnetic Band Structure Of a Perfect Comb-like Structurementioning

confidence: 99%

“…Three previous papers [25][26][27] proposed a model of a one-dimensional (1D) photonic comb-like structure (also called star waveguide) exhibiting electromagnetic bands separated by large gaps (zeros of transmission). This system is composed by an infinite 1D segment (the backbone) along which a finite site of resonators are grafted periodically.…”

Section: Introductionmentioning

confidence: 99%

“…These frequencies are broadened into gaps when several side branches are grafted at equidistant nodes along the waveguide. Using these gaps, the electromagnetic waves can be controlled and manipulated effectively, so gaps materials have been found to have a wider range of applications [25][26][27][28]. When left-handed materials are introduced into these systems, some unusual band gaps can also be found [29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

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Electromagnetic Filters Based on a Single Negative Photonic Comb-Like Structure

Ben-Ali¹,

Tahri²,

Bria³

2019

PIER C

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This work describes a theoretical study of filters using a defect in one-dimensional photonic comb-like structure. This photonic comb-like structure is constituted by finite or infinite segments which have negative permeability and grafted in each site by a finite number of lateral branches (play the role of the resonators), which consists of a negative permittivity. Numerical results exhibit the permissible bands which are separated by gaps (forbidden band). These gaps originate not only from the periodicity of the system but also from the resonance states of the grafted lateral branches. We study the effect of the presence of a resonator defect on the transmission behavior, phase, and phase time. The electromagnetic band structure shows that there is a defect mode in the gap. The transmission rate and the reduced frequency of this mode are related to the variation of defect length. Similarly, we calculate, for the first time, the quality factor evolution of this defect mode when the defect length varies. This structure can be used as a new optical filter in the microwave range with a high factor of quality and of transmission.

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“…The design of the device based on a one-dimensional photonic periodic system (such as star waveguides consisting on coaxial cables) is extremely interesting for designers of integrated circuits used in the telecommunication field (filters, couplers, switches, etc.) [22][23][24]. Recent works show a great tendency in these photonic star waveguides because of their outstanding electromagnetic properties.…”

Section: Introductionmentioning

confidence: 99%

Two-Channel Demultiplexer Based on 1d Photonic Star Waveguides Using Defect Resonators Modes

Ben-Ali¹,

Kadmiri²,

Ghadban³

et al. 2021

PIER B

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In this work, we give a theoretical demonstration of the possibility to realize a photonic demultiplexer. The demultiplexer consists of Y-shaped waveguides with one input line and two output lines. We consider a demultiplexer composed of a segment and two asymmetric resonators, grafted at the same position in each channel. This system creates the resonance modes that have a maximum transmission rate and low Q quality factors. To improve these results, we take each output line consisting of a periodicity of segments and grafted at its extremities by a single resonator. Such a system creates passbands separated by band gaps. On the other hand, the presence of a resonator defect in the middle of each output line allows us to create defect modes inside the gaps. The results show that our proposed demultiplexer system manages to separate two incoming mixed signals of frequencies f 1 = 204.75 MHz and f 2 = 208.75 MHz and guide each one of them into two different channels.

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Double Frequency Filtering by Photonic Comb-Like

Cited by 20 publications

References 23 publications

High Quality Factor Microwave Multichannel Filter Based on Multi-Defectives Resonators Inserted in Periodic Star Waveguides Structure

High Quality Factor Microwave Multichannel Filter Based on Multi-Defectives Resonators Inserted in Periodic Star Waveguides Structure

Electromagnetic Filters Based on a Single Negative Photonic Comb-Like Structure

Two-Channel Demultiplexer Based on 1d Photonic Star Waveguides Using Defect Resonators Modes

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