The Design of a 0.35THz Microstrip Patch Antenna on LTCC Substrate

El-Nawawy, M. S.; Allam, A. M. M. A.; Korzec, A. Allam

doi:10.5923/j.eee.20110101.01

Cited by 15 publications

(11 citation statements)

References 13 publications

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“…The theoretical resonant frequency of the SRR/TW unit cell is 10 GHz, according to the theories developed in Ref. , which is matched with the operating frequency of the patch antenna. The transversal periodicity is a = 3.5 mm, which is less than 1/8 of the free space wavelength at resonance, which is used to construct the 2D MTM periodic structure to employ the MTM lens as will be illustrated in the next section.…”

Section: Analysis and Design Of Proposed Antennamentioning

confidence: 93%

“…Here, a unit cell of SRR/TW with negative effective permittivity ( ε r ) and negative effective permeability (μ r ) is designed. The dimensions of the SRR/TW unit cell are designed and optimized in order to give a simultaneous negative permittivity and negative permeability in a frequency range to be matched with the bandwidth of the patch antenna designed in the last subsection , to achieve an optimal beam focusing when it is integrated with the patch antenna. The SRR is a copper layer with thickness t of 35 μm mounted on the top side of a RT/Duriod 5880 dielectric substrate with relative dielectric permittivity ε r of 2.2 and height h = 1.57 mm, and the TW is mounted on the other side, i.e.…”

Section: Analysis and Design Of Proposed Antennamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High performance terahertz antennas based on split ring resonator and thin wire metamaterial structures

Abdelrehim

Ghafouri‐Shiraz

2015

Micro & Optical Tech Letters

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In this letter, the left‐handed metamaterial (LH‐MTM) which has a negative refractive index (NRI) is employed to improve the performance of microstrip patch antenna. The LH‐MTM used in this work is a 3D periodic structure which consists of split ring resonators and thin wires (SRR/TW). The LH‐MTM is placed in front of the microstrip patch antenna and due to the NRI property of the LH‐MTM; the radiated electromagnetic beam size reduces which results in a highly focused beam. The proposed antenna has been designed and simulated using CST microwave studio and the MTM effective parameters are extracted from the s parameters by using Nicolson–Ross–Weir (NRW) algorithm. A parametric analysis has been performed to study the effects of the patch antenna and LT‐MTM lens separation and the size of the 3D LH‐MTM structure on the radiating properties and the impedance matching of the proposed antenna. For the experimental verification, the proposed antenna operating at 10 GHz is fabricated, the return loss and the gain for the proposed antenna with and without MTM are measured. Furthermore, the results show the antenna gain improved by 1.5 dB which validate the concept of beam focusing using NRI MTM structure, while the return loss and the bandwidth are slightly reduced. However, the idea has been extended to the terahertz frequency range by designing and simulating a 303 GHz antenna for heartbeat rate (HR) measurement. For 303 GHz patch antenna, the results demonstrate an improvement in the gain by 1.1 dB, in the bandwidth by 14.73 GHz, and in the return loss by 12.62 dB over their original values without MTM lens, while the beam size is slightly reduced. The simulation and experimental results investigated the idea of the beam focusing using NRI MTM for wide frequency ranges including microwaves and terahertz. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:382–389, 2016

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Section: Analysis and Design Of Proposed Antennamentioning

confidence: 93%

Section: Analysis and Design Of Proposed Antennamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High performance terahertz antennas based on split ring resonator and thin wire metamaterial structures

Abdelrehim

Ghafouri‐Shiraz

2015

Micro & Optical Tech Letters

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“…It was shown that the electromagnetic waves in the media can be congregated in a narrow rectangle area properly when applied to a monopole antenna; this structure can greatly improve the directivity of the antenna. Also, metamaterials have been designed and investigated in the THz frequency range for developing new THz devices such as antennas, filters, sensors, and absorbers [31][32][33][34]. Furthermore, metamaterial structures composed of 3-D metal grid superstrate have been used to improve the directivity of the antenna [35,36].…”

Section: Introductionmentioning

confidence: 99%

Performance Improvement of Patch Antenna Using Circular Split Ring Resonators and Thin Wires Employing Metamaterials Lens

Abdelrehim¹,

Ghafouri‐Shiraz²

2016

PIER B

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In this paper, the left-handed metamaterial which acts as a lens is employed to improve the performance of a microstrip patch antenna. The left-handed metamaterial used in this work is a three-dimensional periodic structure which consists of circular split ring resonators and thin wires. The three-dimensional periodic metamaterial structure shows angular independency characteristics in wide range angles, so it acts as a metamaterial lens. However, the MTM structure infinite periodicity truncation has no impacts on the MTM lens scattering, effective parameters and homogeneity. The lefthanded metamaterial is placed in front of the microstrip patch antenna and due to the negative refractive index property of the left-handed metamaterial; the radiated electromagnetic beam size decreases which results in a highly focused beam. The proposed antenna has been designed and simulated using CST microwave studio, and the metamaterial effective parameters are extracted from the S parameters by using Nicolson-Ross-Weir algorithm and by selecting the appropriate ambiguity branch parameter. Furthermore, the angular independency of the metamaterial lens has been verified by rotating the metamaterial structure with respect to the excitation probe of the transverse electromagnetic waves and extracting the S-parameters and the effective parameters for each rotation angle. A parametric analysis has been performed to study the effects of the patch antenna and left-handed metamaterial lens separation and the size of the three-dimensional left-handed metamaterial structure on the radiating properties and the impedance matching of the proposed antenna. For the experimental verification, the proposed antenna operating at 10 GHz is fabricated; the return loss, radiation pattern and gain for the proposed antenna with and without metamaterial are measured. Furthermore, the results show that the antenna gain is improved by 4.6 dB which validates the concept of beam focusing using negative refractive index metamaterial structure, while the return loss and bandwidth are slightly reduced. The simulation and experiment investigated the idea of the beam focusing using negative refractive index metamaterial lens in microwave regime.

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“…The terahertz spectrum has many unique radiation characteristics as high image resolution, high level of wave penetration and low ionization in biological tissues [2]. Microstrip antenna has been introduced to terahertz communication because of its simplicity of fabrication and compactness [3,4]. The microstrip antenna has small-size, low-cost, reliability configurability and suitability for diversity.…”

Section: Introductionmentioning

confidence: 99%

B9. Equivalent circuit with frequency-independent lumped elements for plasmonic graphene patch antenna using particle swarm optimization technique

Malhat

2015

2015 32nd National Radio Science Conference (NRSC)

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Graphene patch microstrip antenna has been investigated for 600 GHz applications. The graphene material introduces a reconfigurable surface conductivity in terahertz frequency band. The input impedance is calculated using the finite integral technique. A five-lumped elements equivalent circuit for graphene patch microstrip antenna has been investigated. The values of the lumped elements equivalent circuit are optimized using the particle swarm optimization techniques. The optimization is performed to minimize the mean square error between the input impedance of the fmite integral technique and that calculated by the equivalent circuit model. The effect of varying the graphene material chemical potential and relaxation time on the radiation characteristics of the graphene patch microstrip antenna has been investigated. An improved new equivalent circuit model has been introduced to best fitting the input impedance using a rational function and PSO. The Cauer's realization method is used to synthesize a new lumped-elements equivalent circuits.

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The Design of a 0.35THz Microstrip Patch Antenna on LTCC Substrate

Cited by 15 publications

References 13 publications

High performance terahertz antennas based on split ring resonator and thin wire metamaterial structures

High performance terahertz antennas based on split ring resonator and thin wire metamaterial structures

Performance Improvement of Patch Antenna Using Circular Split Ring Resonators and Thin Wires Employing Metamaterials Lens

B9. Equivalent circuit with frequency-independent lumped elements for plasmonic graphene patch antenna using particle swarm optimization technique

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