Design of a novel dielectric resonator antenna using MgTiO3–CoTiO3 for wideband applications

Ullah, Ubaid; Ali, Wan Fahmin Faiz Wan; Ain, Mohd Fadzil; Mahyuddin, Nor Muzlifah; Ahmad, Zainal Arifin

doi:10.1016/j.matdes.2015.07.026

Cited by 36 publications

(15 citation statements)

References 23 publications

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“…To date, very little research has been published in which the dielectric resonator physical shape and geometry is maintained while the permittivity is altered [25,26]. In this work, novel inhomogeneous nested square-shape dielectric resonators (NSDR) are proposed, in which inhomogeneity (air-gap) will be introduced in the azimuth (ϕ) direction so that the original shape of the resonator and its radiating characteristics remain uninterrupted.…”

Section: Introductionmentioning

confidence: 99%

A nested square-shape dielectric resonator for microwave band antenna applications

Ullah

Mabrouk

Al‐Hasan

et al. 2021

IJECE

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In this paper, a nested square-shape dielectric resonator (NSDR) has been designed and investigated for antenna applications in the microwave band. A solid square dielectric resonator (SSDR) was modified systematically by introducing air-gap in the azimuth (ϕ-direction). By retaining the square shape of the dielectric resonator (DR), the well-known analysis tools can be applied to evaluate the performance of the NSDR. To validate the performance of the proposed NSDR in antenna applications, theoretical, simulation, and experimental analysis of the subject has been performed. A simple microstrip-line feeding source printed on the top of Rogers RO4003 grounded substrate was utilized without any external matching network. Unlike solid square DR, the proposed NSDR considerably improves the impedance bandwidth. The proposed antenna has been prototyped and experimentally validated. The antenna operates in the range of 12.34GHz to 21.7GHz which corresponds to 56% percentage bandwidth with peak realized gain 6.5dB. The antenna has stable radiation characteristics in the broadside direction. A close agreement between simulation and experimental results confirms the improved performance of NSDR in antenna applications.

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Section: Introductionmentioning

confidence: 99%

A nested square-shape dielectric resonator for microwave band antenna applications

Ullah

Mabrouk

Al‐Hasan

et al. 2021

IJECE

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“…Most importantly, the presence of Dirac magnons at symmetry protected points in k-space was observed [15] which makes CoTiO 3 a model system to study non-trivial magnon band topology [10]. Application wise, CoTiO 3 has been studied in the past for its adaptability as high-κ dielectrics [17,18], resonator antennas [19] and more recently for its significant magnetodielectric coupling properties [20,21]. The mechanism yielding the observed significant magnetodielectric coupling in CoTiO 3 is however unclear.…”

Section: Introductionmentioning

confidence: 99%

Magnetic phase diagram, magnetoelastic coupling and Grüneisen scaling in CoTiO$_3$

Hoffmann¹,

Dey

Werner³

et al. 2021

Preprint

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High-quality single crystals of CoTiO 3 are grown and used to elucidate in detail structural and magnetostructural effects by means of high-resolution capacitance dilatometry studies in fields up to 15 T which are complemented by specific heat and magnetization measurements. In addition, we refine the singlecrystal structure of the ilmenite (R 3) phase. At the antiferromagnetic ordering temperature T N pronounced λ-shaped anomaly in the thermal expansion coefficients signals shrinking of both the c and b axes, indicating strong magnetoelastic coupling with uniaxial pressure along c yielding six times larger effect on T N than pressure applied in-plane. The hydrostatic pressure dependency derived by means of Grüneisen analysis amounts to ∂T N /∂p ≈ 2.7(4) K/GPa. The high-field magnetization studies in static and pulsed magnetic fields up to 60 T along with high-field thermal expansion measurements facilitate in constructing the complete anisotropic magnetic phase diagram of CoTiO 3 . While the results confirm the presence of significant magnetodielectric coupling, our data show that magnetism drives the observed structural, dielectric and magnetic changes both in the short-range ordered regime well-above T N as well as in the long-range magnetically ordered phase.

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“…DRA can provide a wide range of permittivities or dielectric constants, variety of shapes, and different kind of feeding mechanisms to integrate with the complex wireless system, and owns low losses at high frequency. [8][9][10] The above properties of the DRA make it to be a better choice in the design of antenna over the others. With the rapid development of modern wireless system, wideband antennas are more extensively applied than ever.…”

Section: Introductionmentioning

confidence: 99%

Thermally tunable slot-coupled dielectric resonator antenna

Chen

Wang

et al. 2017

AIP Advances

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Absorption enhancement and total absorption in a graphene-waveguide hybrid structure AIP Advances 7, 025101 (2017); https://doi.org/10.1063/1.4975706The influence of the edge effect on the skyrmion generation in a magnetic nanotrack AIP Advances 7, 025105 (2017) A thermally tunable slot-coupled dielectric resonator antenna (DRA) has been designed and prepared by placing a thermosensitive ceramic resonator onto the slot. Typical magnetic resonance occurs in the resonator, which is closely related to its dielectric constant. Because the dielectric constant of the ceramic resonator decreases as the temperature increases, the resonance frequency of the proposed DRA increases as the temperature increases. The simulated results are in good agreement with the measured ones, which confirms the thermally tunable behavior. This approach provides a way for designing the frequency tunable antennas. © 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license

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Design of a novel dielectric resonator antenna using MgTiO3–CoTiO3 for wideband applications

Cited by 36 publications

References 23 publications

A nested square-shape dielectric resonator for microwave band antenna applications

A nested square-shape dielectric resonator for microwave band antenna applications

Magnetic phase diagram, magnetoelastic coupling and Grüneisen scaling in CoTiO$_3$

Thermally tunable slot-coupled dielectric resonator antenna

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