Parametric Analysis of Negative and Positive Refractive Index Lens Antenna by ANSYS HFSS

Hung, Phan Van; Dinh, Nguyen Quoc; Yamada, Yoshıhıde; Michishita, Naobumi; Islam, Mohammad Tariqul

doi:10.1155/2020/9128921

Cited by 9 publications

(1 citation statement)

References 27 publications

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“…A lens antenna is usually made from low refractive index material that can minimize the reflection at the lens surface. It has no aperture blockage issue caused by the feed radiator and can be designed to have low sidelobe levels [13][14][15][16][17][18][19][20][21]. There are many types of lens antennas with different characteristics.…”

Section: Introductionmentioning

confidence: 99%

Design of Bifurcated Beam using Convex Bent Array Feed for Satellite Mobile Earth Station Application

Tengah¹,

Rahman²,

Yamada³

et al. 2022

RADIOENGINEERING

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For multibeam operation at the satellite mobile earth station and telecommunication base stations, a cylindrical lens antenna with multi-feed is a promising candidate due to the simple antenna configuration and good scanning performance to produce multi beams. However, efficient illumination at the lens surface is critical. Previously, the present antennas were used; however, a significant tapered distribution is observed, resulting in underillumination at the lens edges. The feed positions are requested to be placed near the lens to achieve a slender lens form. Therefore, the feed radiation pattern should have high radiations at the wide-angle region. This paper proposes a bifurcated beam array antenna to alter the amplitude distribution. This method is expected to improve the radiation pattern coverage area. In designing a bifurcated beam antenna, the important parameter is to ensure that the separated beams have the same current phase excitations at each radiating element and a precise patch arrangement to achieve the targeted radiation pattern. The differences in surface current will affect the radiation patterns due to the significant interference and cancellation effects which will contribute to high losses. This paper forms the array by a convex bent array with the same phase excitation for all patch elements. The feed performances are also verified by the good agreement between simulated and measured results. An improved aperture distribution is demonstrated for array feed having 0.7λo spacing compared to the tapered distribution by a single patch design with the hyperbolic lens through detailed analysis and comparative study. By changing the spacing distance of the convex bent array, many radiation patterns are observed, such as strong radiation in the wide-angle region, the uniform radiation level in a wide-angle region, and the tapered radiation pattern. Thus, many aperture distributions of center-dip, uniform and tapered, are achieved.

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Section: Introductionmentioning

confidence: 99%

Design of Bifurcated Beam using Convex Bent Array Feed for Satellite Mobile Earth Station Application

Tengah¹,

Rahman²,

Yamada³

et al. 2022

RADIOENGINEERING

View full text Add to dashboard Cite

show abstract

Crosstalk analysis of twisted bundle of twisted wire pairs (TBTWPs) and star‐quad cables under the effect of inner and outer excitations

Su,

Gassab,

Zhang

et al. 2023

Int J Numerical Modelling

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In this article, deep neural network (DNN) and chain parameter methods are used to analyze the crosstalk coupling of a star‐quad and a twisted bundle of twisted wire pairs (TBTWP) cables for different excitations, respectively. A DNN is used to extract the per‐unit‐length (p.u.l) resistance, inductance, capacitance, and conductance (RLCG) parameters at any position for the star‐quad and TBTWP cables. The induced common mode (CM) and differential mode (DM) currents due to crosstalk are calculated by combining the obtained RLCG parameters with the chain parameter method. The obtained results show good agreement with that of FEKO software. Moreover, it is found that the star‐quad cable can reduce the external coupling more effectively than that of the TBTWP cable. Finally, measurements are performed to further validate the accuracy of our proposed algorithm.

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Implementation of a Logarithmic Antenna at a Frequency of 2.4 GHz for a Low-Cost Laboratory

Morales,

Beltrán,

González

et al. 2024

Lecture Notes in Networks and Systems

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Parametric Analysis of Negative and Positive Refractive Index Lens Antenna by ANSYS HFSS

Cited by 9 publications

References 27 publications

Design of Bifurcated Beam using Convex Bent Array Feed for Satellite Mobile Earth Station Application

Design of Bifurcated Beam using Convex Bent Array Feed for Satellite Mobile Earth Station Application

Crosstalk analysis of twisted bundle of twisted wire pairs (TBTWPs) and star‐quad cables under the effect of inner and outer excitations

Implementation of a Logarithmic Antenna at a Frequency of 2.4 GHz for a Low-Cost Laboratory

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