Characteristics of a Circular Loop Antenna in the Presence of a Coaxial Conducting BOR Attached to a Planar Reflector

Hamed, Sameir M. Ali; Bashir, Saad Osman

doi:10.1109/lawp.2013.2270949

Cited by 5 publications

(4 citation statements)

References 14 publications

(18 reference statements)

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“…Research on the loop antenna analysis method has been conducted by Sen et al, about the general method of current excitation reconstruction in cylindrical antenna arrays [13], Joshi and Behera about the method of moment analysis in circular loop linear arrays and loop arrays [14]. Research on the characteristics of circular loop antennas has been carried out by Hamed and Bashir on the characteristics of circular loop antennas [15], Salem, and Caloz about the emission of electromagnetic fields by arbitrary currents in circular loops [16]. Research on loop antenna applications has been conducted by Vembarasi et al regarding the design of bi-circular antennas as wideband antennas [17], Zheng et al about the use of loop wire antenna as an orbital angular momentum generator [18].…”

Section: The Increasing Need Of Modern Society For Communication and mentioning

confidence: 99%

Analysis of Bandwidth and Working Frequency of Bi-circular Antenna

2021

IJATCSE

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This paper discusses the analysis results of determining the bandwidth and working frequency of a bi-circular antenna design. The analysis was carried out using three approaches, namely the FDTD simulation method, the measurement method using a network analyzer on the fabrication results of the antenna design, and the method of applying the bi-polygonal antenna model to the bi-circular antenna design. The novelty in this research is the application of the bi-polygonal antenna model and the comparison of the results of determining the bandwidth and working frequency of a bi-circular antenna with these three methods. Based on the results of the analysis using these three methods, it was found that different bandwidth values and the same antenna working frequency value were 2.45 GHz. The modeling results give a narrow and symmetrical form of return loss vs. frequency curve, the simulation results give a wide and slightly symmetrical form of return loss vs. frequency curve, and the measurement results give a wide and asymmetrical shape of return loss vs. frequency curve.

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Section: The Increasing Need Of Modern Society For Communication and mentioning

confidence: 99%

Analysis of Bandwidth and Working Frequency of Bi-circular Antenna

2021

IJATCSE

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“…The study of the performance of CLAs carrying different forms of current and in the presence of discontinuities has been considered in many studies such as the loop near a planar interface [1,2], the loop in front of a resistive sheet [3], the loop above a lossless ground plane [4] and a circular loop on a lossy half space [5]. Investigation of the performance of CLAs around conducting body has been conducted for a thin loop on multilayered spheroid media [6], a single CLA neighbouring a cylinder, a sphere or a cone in [7], a CLA in the presence of a coaxial conducting body of revolution attached to a planar reflector in [8] and multiple circular loops around a conducting cone in [9].…”

Section: Introductionmentioning

confidence: 99%

“…The spatial dyadic Green's has been proposed to investigate the patch antennas in a layered spherical media [18,19]. Despite the accuracy and efficiency of these integral methods, a few of them have been interested in the analysis of CLA around multilayer dielectric sphere [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

WCIP method for multiple‐loop antennas around a spherical media

Ammar

Baudrand

2019

IET Microwaves, Antennas & Propagation

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In this study, the wave concept iterative process method is developed in a spherical coordinate system in order to investigate the characteristic of multiple‐loop antennas around a multilayer sphere. The analysis method is based on the incoming and outgoing waves defined from the tangential electromagnetic fields at the interfaces of the layers. The iterative process is governed by two systems of equations linking the waves in spectral and spatial domains. The toggling between the two domains is insured by the Legendre transformation. Numerical results consider single and multiple loops (both activated and parasitic loops) around a metallic sphere coated by one or several dielectric layers. The mutual coupling and the radiation characteristic of a loop excited by two feeding sources are analysed. The influence of parasitic loops on the return loss of the activated loop is extensively investigated including the number and the position of the loops on the sphere. The coupling sensitivity between two activated feeding sources is also investigated. The presented results agree very well with the simulation and the literature.

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“…al. [11,12] have shown that the presence of a conducting body of revolution type reflectors near a loop antenna can improve both antenna directivity and VSWR. Even though extensive research is conducted on loop antenna arrays and systems as Yagi-Uda and log periodic arrays, seldom published work on concentric loop array configuration can be found.…”

Section: Introductionmentioning

confidence: 99%

Design Formulas for Broadband Concentric Circular-Loops Antennas

Hamed¹,

Osman²

2015

AEM

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This paper presents a simple formulas for designing broadband concentric circular-loops antennas (CCLAs). The loop dimensions for widest bandwidth are derived and expressed in terms of driven loop resonance frequency. The analysis addresses CCLAs with and without ground planes senarios.The derived formulas are used to design multiple CCLAs. For example, a 3-elements CCLA of a maximum radius of 6.34 cm can be designed to operate with a voltage standing wave ratio (VSWR) < 2 over the frequency band with fractional bandwidth of 16.9% with a minimum directivity of 3.9 dB. Addionationally, a 4-elements CCLA of maximum radius of 15 cm can be design to operate in the frequency band extending from 825 MHz to 991 MHz (fractional bandwidth of 18.3%) with a VSWR < 2 and directivity higher than 5.2 dB over the entire band. Furthermore, the analysis shows that a 3-elements CCLA backed with a conducting ground plane improves the fractional bandwidth to 19.6% and directivity to 9.15 dB over the band of interest. The analytical results on designed antennas are validated with simulation results obtained by using the AN-SOF antenna simulation software. An excellent agreement is observed between analytical and AN-SOF simulations results.

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Characteristics of a Circular Loop Antenna in the Presence of a Coaxial Conducting BOR Attached to a Planar Reflector

Cited by 5 publications

References 14 publications

Analysis of Bandwidth and Working Frequency of Bi-circular Antenna

Analysis of Bandwidth and Working Frequency of Bi-circular Antenna

WCIP method for multiple‐loop antennas around a spherical media

Design Formulas for Broadband Concentric Circular-Loops Antennas

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