An Analytic Formula of the Current Distribution for the VLF Horizontal Wire Antenna Above Lossy Half-Space

Chen, Hai; Luo, Jianxin; Zhang, and Da-Kui

doi:10.2528/pierl07112904

Cited by 12 publications

(6 citation statements)

References 13 publications

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“…Theoretically, the dipole antenna is a resonance structure and supports a standing wave of current. However, the current distribution can be altered to support a traveling wave with attenuation while traveling from the feed point to the terminations of the dipole arms [23,24]. This is true for photoconductive antennas possessing very long DC bias striplines with open-circuited terminations in a high dielectric constant substrate, because there is little current to be reflected back owing to the radiation as the current travels along the long striplines.…”

Section: Introductionmentioning

confidence: 99%

Effects of Antenna Design Parameters on the Characteristics of a Terahertz Coplanar Stripline Dipole Antenna

Nguyen¹

2013

PIER M

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Abstract-This paper presents the antenna design parameter dependency on the impedance and radiation characteristics of a terahertz coplanar stripline dipole antenna. The antenna response is numerically investigated by applying a semi-infinite substrate and by generating a constant voltage source to drive a signal on the antenna. In this way, we can analyze the antenna characteristics without the photoconductive material response and the substrate lens geometrical effects. Further, we explain the mechanism underlying the preferable uses of several millimeter length DC bias striplines in a typical THz coplanar stripline dipole antenna design. The antenna, consisting of a center dipole connected to long bias striplines, has a traveling wave characteristic supporting an attenuated current, rather than a resonant characteristic supporting a standing wave of current. The traveling wave behavior produces stable antenna input impedances and minimal changes in the antenna radiation patterns. We also found that the length of the center dipole has a prominent effect on the antenna gain response.

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Section: Introductionmentioning

confidence: 99%

Effects of Antenna Design Parameters on the Characteristics of a Terahertz Coplanar Stripline Dipole Antenna

Nguyen¹

2013

PIER M

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“…The problem of calculating the radiated fields from a horizontal electric dipole antenna over a halfspace is a classical problem in electromagnetics and is often the starting point for many simulations of Ground Penetrating Radar (GPR). It has been extensively studied, beginning with Sommerfeld in 1909 [26,27], with further work by [1,13,29], and more recently [2,4,8,16,17,21,22]. The aim of this research is to compare solutions to this problem using current implementations of the most commonly used numerical techniques, namely: the Finite-Difference Time-Domain (FDTD) method; the Finite-Integration Technique (FIT); and Time-Domain Integral Equation (TDIE) methods.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Time-Domain Finite-Difference, Finite-Integration, and Integral-Equation Methods for Dipole Radiation in Half-Space Environments

Warren¹,

Šesnić

Ventura

et al. 2017

PIER M

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In this paper we compare current implementations of commonly used numerical techniques-the Finite-Difference Time-Domain (FDTD) method, the Finite-Integration Technique (FIT), and Time-Domain Integral Equations (TDIE)-to solve the canonical problem of a horizontal dipole antenna radiating over lossless and lossy half-spaces. These types of environment are important starting points for simulating many Ground Penetrating Radar (GPR) applications which operate in the nearfield of the antenna, where the interaction among the antenna, the ground, and targets is important. We analysed the simulated current at the centre of the dipole antenna, as well as the electric field at different distances from the centre of the antenna inside the half-space. We observed that the results from the simulations using the FDTD and FIT methods agreed well with each other in all of the environments. Comparisons of the electric field showed that the TDIE technique agreed with the FDTD and FIT methods when observation distances were towards the far-field of the antenna but degraded closer to the antenna. These results provide evidence necessary to develop a hybridisation of current implementations of the FDTD and TDIE methods to capitalise on the strengths of each technique.

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“…The variety of available vibrator structures and also creation of new constructions on their basis stipulate constant interest of investigators to the problems of their analysis and synthesis. So, for example, location of different active and passive elements in definite points along the length of a vibrator's antenna and also vibrator's excitation in a distinctive from its centre point create additional opportunities to form the set electrodynamic characteristics of vibrator radiators [1][2][3][4][5]. From our point of view, thin vibrators, on the surface of which impedance boundary conditions are performed, can serve these aims [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Impedance Vibrator With Arbitrary Point of Excitation

Nesterenko¹,

Katrich²,

Dakhov³

et al. 2008

PIER B

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Abstract-The approximate analytical solution of the integral equation concerning the current in a thin straight vibrator with complex surface impedance has been obtained. The vibrator is located in unlimited space and is excited in an arbitrary point along its length. The calculations have been made and the plots of electrodynamic characteristics of the vibrator, depending of the value and the type of its surface impedance and the excitation point location, are represented. The comparative analysis between the calculated and the experimental data and also the results, obtained by the method of moments, are represented for perfectly conducting vibrators.

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An Analytic Formula of the Current Distribution for the VLF Horizontal Wire Antenna Above Lossy Half-Space

Cited by 12 publications

References 13 publications

Effects of Antenna Design Parameters on the Characteristics of a Terahertz Coplanar Stripline Dipole Antenna

Effects of Antenna Design Parameters on the Characteristics of a Terahertz Coplanar Stripline Dipole Antenna

Comparison of Time-Domain Finite-Difference, Finite-Integration, and Integral-Equation Methods for Dipole Radiation in Half-Space Environments

Impedance Vibrator With Arbitrary Point of Excitation

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