Analysis and design of microstrip antenna array using interdigital capacitor with CRLH-TL ground plane for multiband applications

Madany, Yasser M.; Mohamed, Darwish A. E.; Halim, Bishoy I.

doi:10.1109/eucap.2014.6901913

Cited by 12 publications

(3 citation statements)

References 13 publications

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“…The magnetic field causes the parasitic inductance due to the surface current motion on the capacitor digits. At the same time, the parasitic capacitance is caused by the electric field gradients between the ground and the traces [29], see Fig. 2(b).…”

Section: A Crlh-mtm Designmentioning

confidence: 99%

A Miniaturized Printed Circuit CRLH Antenna-based Hilbert Metamaterial Array

Ismail

Elwi

Salim

2022

JCOMSS

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With the development of communication systems and antennas, various challenges arise that require antennas of small size with enhanced performance. Metamaterials (MTM) defects introduced a considerable solution to such a challenge. Therefore, in this paper, a lightweight with low profile antenna is designed based on a novel design of a Composite Right/Left-Handed CRLH-MTM Hilbert array. The proposed CRLH-MTM unit cell consists of a T-symmetric CRLH unit cell conjugated to the 3rdorder Hilbert on the ground plane through a T-stub structure to enhance the gain-bandwidth product. CST-MWS is used to stimulate and design the proposed antenna structure. The antenna parameters are optimized to evaluate the antenna performance in gain and S11. As a result, the antenna can operate forward and backwards with a large scanning angle ranging from +34 o to -134 o with changing frequency, and dual-band extended from 3.3GHz to 4.2GHz 4.86GHz 5.98GHz with a maximum gain of 7.24dBi and 3.74dBi, respectively. The beam steering is achieved by trough controlling the switching operation of PIN diodes. As a result, the antenna can scan up to 8° from 34° to 42° at 3.5GHz with constant gain along with the operating range.

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Section: A Crlh-mtm Designmentioning

confidence: 99%

A Miniaturized Printed Circuit CRLH Antenna-based Hilbert Metamaterial Array

Ismail

Elwi

Salim

2022

JCOMSS

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“…The measured return loss is -21dB at 4.2GHz. The paper [2] introduces a wearable microstrip patch antenna featuring an interdigital capacitor and rectangular stub. The inclusion of the rectangular stub provides inductance, while the interdigital capacitor contributes capacitance.…”

Section: Literature Reviewmentioning

confidence: 99%

Wearable T – Shaped Metamaterial Microstrip Patch Antenna with Split Ring Resonators for Wi-Fi Applications

Mehaboob Mujawar

2024

jes

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This paper presents the design of a T-shaped metamaterial microstrip patch antenna integrated with split ring resonators, tailored for IEEE 802.11a Wi-Fi applications. The antenna utilizes a non-woven polypropylene geotextile substrate, measuring 1.9 mm thick with a dielectric constant of 2.2, while the copper sheet thickness is 0.1 mm. Performance metrics such as reflection coefficient, antenna gain, and VSWR are evaluated. Simulated results show a reflection coefficient of -21 dB at 5 GHz, which closely matches the measured value of -22 dB. VSWR values of 1.5 and 1.3 are obtained through simulation and measurement respectively. Additionally, SAR analysis indicates suitability for wearable applications, with the SAR value exceeding 10 grams of tissue falling within acceptable limits.

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“…The interdigitated capacitor probe is a traveling wave probe, and as such needs appropriate resistive loading to eliminate a standing wave across the probe. Reactive loading can also be used, [24], but is prohibitively large for this application and number of radiating elements. Simulations show that a 25Ω load would allow 30% of the power to be dissipated in the load.…”

Section: B Interdigitated Capacitor Probementioning

confidence: 99%

Excitation and RF Field Control of a Human-Size 10.5-T MRI System

Bluem

Moortele

Adriany

et al. 2019

IEEE Trans. Microwave Theory Techn.

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This paper presents an investigation of methods for improving homogeneity inside various dielectric phantoms situated in a 10.5 T human-sized MRI. The transmit B 1 (B 1 +) field is excited with a quadrature fed circular patch-probe and a 12 element capacitively-loaded microstrip array. Both simulations and measurements show improved homogeneity in a cylindrical water phantom, an inhomogeneous phantom (pineapple), and a NIST standard phantom. The simulations are performed using a full-wave finite-difference time-domain solver (Sim4Life) in order to find the B 1 + field distribution and compared to the gradient recalled echo image and efficiency result. For additional field uniformity, the wall electromagnetic boundary conditions are modified with a passive quadrifilar helix. Finally, these methods are applied in simulation to head imaging of an anatomically correct human body model (Duke, IT'IS Virtual Population) showing improved homogeneity and specific absorption rate for various excitations.

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Analysis and design of microstrip antenna array using interdigital capacitor with CRLH-TL ground plane for multiband applications

Cited by 12 publications

References 13 publications

A Miniaturized Printed Circuit CRLH Antenna-based Hilbert Metamaterial Array

A Miniaturized Printed Circuit CRLH Antenna-based Hilbert Metamaterial Array

Wearable T – Shaped Metamaterial Microstrip Patch Antenna with Split Ring Resonators for Wi-Fi Applications

Excitation and RF Field Control of a Human-Size 10.5-T MRI System

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