Design of a polarisation reconfigurable patch antenna using ferrimagnetic materials

Zervos, T.; Alexandridis, Antonis A.; Lazarakis, F.; Pissas, M.; Σταμόπουλος, Δ.; Angelopoulos, E.; Dangakis, K.

doi:10.1049/iet-map.2011.0224

Cited by 23 publications

(9 citation statements)

References 15 publications

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“…7a, which featured BWs of 3.3% and 2.8% at −6 dB reflection. In these two bands, the biased MDA was circularly polarized [12], [13]. Efficiency was characterized in a 35% BW (4.2-6.0 GHz, m = 901).…”

Section: B Dual-band Circularly-polarized Biased Mdamentioning

confidence: 99%

“…The S 11 data produced by multiband and/or circularly polarized magneto-dielectric antennas (MDAs) built on externally biased ferrimagnetic compounds [12], [13] are such that almost none of the above PPAs can extract their true efficiency. The complementary Q-factor method (CQFM) [10], [11], is able to characterize the efficiency of multiband and/or CP antennas, but it is sensitive to the size of the cavity.…”

Section: Introductionmentioning

confidence: 99%

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Efficiency measurements of multiband and circularly polarized magneto-dielectric antennas by the equivalent-circuit wheeler cap

Kakoyiannis

Zervos

Fikioris

et al. 2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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Accurate Wheeler cap measurements, either in a narrow or a wide band, are critically affected by the postprocessing method employed to deduce efficiency values from raw data. Stringent cases like multiband or circularly polarized (CP) antennas cannot be handled accurately by typical postprocessing methods, but lend themselves to post-processing based on equivalent circuits. This paper revisits the equivalent-circuit Wheeler cap (EC-WCap) and modifies all steps of the algorithm, thus significantly enhancing its simplicity and speed, while maintaining a wideband measurement capacity. This enhancement of EC-WCap was driven by the need to accurately characterize multiband CP magneto-dielectric antennas built on externally biased ferrimagnetic compounds, which resist characterization by other Wheeler-cap-related post-processing methods.

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Section: B Dual-band Circularly-polarized Biased Mdamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficiency measurements of multiband and circularly polarized magneto-dielectric antennas by the equivalent-circuit wheeler cap

Kakoyiannis

Zervos

Fikioris

et al. 2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

View full text Add to dashboard Cite

show abstract

“…High dielectric constant of the substrate material is always desired for high frequency application to increased amounts of directivity and more centralized results. For a higher frequency resonator, the authors used a ferromagnetic compound as substrate material [ 23 ]. The material was chosen because the curie temperature of the material is greater than the room temperature, which indicates that the magnetic properties of the material remain intact at the operating temperature.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized Dual Band Multislotted Patch Antenna on Polytetrafluoroethylene Glass Microfiber Reinforced for C/X Band Applications

Islam

Samsuzzaman

2014

The Scientific World Journal

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This paper introduces a new configuration of compact, triangular- and diamond-slotted, microstrip-fed, low-profile antenna for C/X band applications on polytetrafluoroethylene glass microfiber reinforced material substrate. The antenna is composed of a rectangular-shaped patch containing eight triangles and two diamond-shaped slots and an elliptical-slotted ground plane. The rectangular-shaped patch is obtained by cutting two diamond slots in the middle of the rectangular patch, six triangular slots on the left and right side of the patch, and two triangular slots on the up and down side of the patch. The slotted radiating patch, the elliptical-slotted ground plane, and the microstrip feed enable the matching bandwidth to be widened. A prototype of the optimized antenna was fabricated on polytetrafluoroethylene glass microfiber reinforced material substrate using LPKF prototyping machine and investigated to validate the proposed design. The simulated results are compared with the measured data, and good agreement is achieved. The proposed antenna offers fractional bandwidths of 13.69% (7.78–8.91 GHz) and 10.35% (9.16–10.19 GHz) where S11 < −10 dB at center frequencies of 8.25 GHz and 9.95 GHz, respectively, and relatively stable gain, good radiation efficiency, and omnidirectional radiation patterns in the matching band.

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“…CM were tasted to show the dependence of composition over pressure, enthalpy, and heat flux. A ferrimagnetic compound (Y 3 Fe 5 O 12 ) is used as substrate material for a high frequency resonator in [ 2 ]. The material is chosen because the Curie temperature of the material is greater than the room temperature which indicates that the magnetic properties of the material remain intact at the operating temperature.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Glass-Reinforced Epoxy Material for Radio Frequency Resonator

Zaman

Islam

Misran

et al. 2014

The Scientific World Journal

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A radio frequency (RF) resonator using glass-reinforced epoxy material for C and X band is proposed in this paper. Microstrip line technology for RF over glass-reinforced epoxy material is analyzed. Coupling mechanism over RF material and parasitic coupling performance is explained utilizing even and odd mode impedance with relevant equivalent circuit. Babinet's principle is deployed to explicate the circular slot ground plane of the proposed resonator. The resonator is designed over four materials from different backgrounds which are glass-reinforced epoxy, polyester, gallium arsenide (GaAs), and rogers RO 4350B. Parametric studies and optimization algorithm are applied over the geometry of the microstrip resonator to achieve dual band response for C and X band. Resonator behaviors for different materials are concluded and compared for the same structure. The final design is fabricated over glass-reinforced epoxy material. The fabricated resonator shows a maximum directivity of 5.65 dBi and 6.62 dBi at 5.84 GHz and 8.16 GHz, respectively. The lowest resonance response is less than −20 dB for C band and −34 dB for X band. The resonator is prototyped using LPKF (S63) drilling machine to study the material behavior.

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Design of a polarisation reconfigurable patch antenna using ferrimagnetic materials

Cited by 23 publications

References 15 publications

Efficiency measurements of multiband and circularly polarized magneto-dielectric antennas by the equivalent-circuit wheeler cap

Efficiency measurements of multiband and circularly polarized magneto-dielectric antennas by the equivalent-circuit wheeler cap

Miniaturized Dual Band Multislotted Patch Antenna on Polytetrafluoroethylene Glass Microfiber Reinforced for C/X Band Applications

Analysis of Glass-Reinforced Epoxy Material for Radio Frequency Resonator

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