Fast Analysis of Photonic Crystal Structures With Mixed-Order Prism Macroelements

Karatzidis, Dimitrios I.; Yioultsis, Traianos V.; Kriezis, Emmanouil E.

doi:10.1109/jlt.2008.922209

Cited by 17 publications

(22 citation statements)

References 32 publications

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“…The unit cell's length that sets the operating frequency region is chosen to be 6 mm, whereas an 1.5-mm-thick FR-4 dielectric substrate with a relative dielectric permittivity of e r ¼ 4.4 and tan d ¼ 0.025 is used. To simulate the device, under study, a FE formulation is implemented along with the proper periodic boundary conditions [15] that allow the derivation of the EBG unit cell's dispersion diagram in the OFF state. The latter is presented in Figure 2, which indicates that eigenfrequencies from DC to 7.78 GHz lie very close to the light cone, indicating a transverse electric and magnetic (TEM) propagation mode.…”

Section: Resultsmentioning

confidence: 99%

Reconfigurable bowtie electromagnetic bandgap‐based microwave filters

Assimonis

Lalas

Kantartzis

et al. 2011

Micro & Optical Tech Letters

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A controllable bowtie-like electromagnetic bandgap (EBG)-based microwave filter is proposed in this article. The device exploits EBG properties to form the desired stopband, whereas tunability is used by means of switching elements. Numerical analysis is performed by a finite element scheme revealing the DC-extending bandstop behavior of the structure. In addition, a prototype of the proposed filter is constructed and measured. Experimental data demonstrate the robustness of the conducted simulations, while an adequate tuning range is observed. The simple, yet efficient and easily fabricated, design promises operational reconfigurability combined with amplitude tunability.

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Section: Resultsmentioning

confidence: 99%

Reconfigurable bowtie electromagnetic bandgap‐based microwave filters

Assimonis

Lalas

Kantartzis

et al. 2011

Micro & Optical Tech Letters

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“…To achieve uniplanarity and compactness the antenna feed is a 50 Ω impedance CPW line. The initial dimensions of the CSRR needed to achieve resonance in the vicinity of 2.45 GHz were estimated by the simulation of its complementary SRR in [15], using a finite element based code [44]. The CSRR and its dual counterpart, i.e., the SRR, are expected to have resonances at frequencies that are close but not exactly the same, due to finite copper thickness and losses [20].…”

Section: Basic Antenna Designmentioning

confidence: 99%

Efficient Isolation Between Electrically Small Metamaterial-Inspired Monopole Antennas

Bourgis¹,

Yioultsis²

2014

PIER B

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In this paper, a new electrically small metamaterial-inspired monopole antenna is presented. It consists of a simple square-shaped coplanar waveguide (CPW-fed) monopole with an embedded complementary split ring resonator (CSRR). It operates at three distinct frequency ranges around 2.45, 4.2, and 5.8 GHz, with low return loss and uniform radiation patterns, making it a perfect candidate for modern wireless applications. Furthermore, using this as a primary unit to construct two different 2 × 2 MIMO configurations, we achieve systematic minimization of mutual coupling, using additional single negative (SNG) metamaterial-inspired resonators. Mutual coupling is reduced by as much as 27 dB at the frequency of interest. Simulated and measured results of all antennas are in good agreement.

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“…1a (inset), having a considerable versatility in determining its resonance frequency by proper parameter choices. First, it is simulated using a finite element-based code [28] to approximately determine initial design parameters for a 2.45 GHz resonance. The ring structure is printed on a standard 1.6 mm FR-4 substrate (ε r = 4.4 and tan δ = 0.02).…”

Section: Design and Layout Of Antenna Elementsmentioning

confidence: 99%

“…2 (inset), which can also be a basis of more complex settings, such as cubic ones [31]. The antenna simulation is also performed via a finite-element code [28]. For all designs, the approximate SRR parameters are chosen via a ring-specific analysis with additional fine-tuning, since the antenna-ring couplings induce slight shifts to resonant frequencies.…”

Section: Design and Layout Of Antenna Elementsmentioning

confidence: 99%

Compact split‐ring resonator‐loaded multiple‐input–multiple‐output antenna with electrically small elements and reduced mutual coupling

Νταϊκος

Yioultsis

2013

IET Microwaves, Antennas & Propagation

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The authors present a compact four‐element multiple‐input–multiple‐output antenna with the potential to operate in WiMAX frequency bands, with its elements being not only closely spaced but also electrically small. Split‐ring resonators or metal stipes are utilised to achieve both goals, that is element miniaturisation and reduction of mutual coupling. The design process is systematic, as it deals with both issues quite separately. Very low values of the envelope correlation coefficient and overall good performance are obtained, without compromising planarity and simplicity.

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Fast Analysis of Photonic Crystal Structures With Mixed-Order Prism Macroelements

Cited by 17 publications

References 32 publications

Reconfigurable bowtie electromagnetic bandgap‐based microwave filters

Reconfigurable bowtie electromagnetic bandgap‐based microwave filters

Efficient Isolation Between Electrically Small Metamaterial-Inspired Monopole Antennas

Compact split‐ring resonator‐loaded multiple‐input–multiple‐output antenna with electrically small elements and reduced mutual coupling

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