Inhomogeneous wave penetration in lossy media

Baccarelli, Paolo; Frezza, Fabrizio; Simeoni, Patrizio; Tedeschi, Nicola

doi:10.1109/ursi-emts.2016.7571523

Cited by 3 publications

(17 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is mainly due to the very low amplitude of the attenuation vector for the antenna chosen [12]. An alternative antenna design was proposed in [13] to allow the deep-penetration condition. The designed antenna was based on uniform and mono-dimensional LWAs, in particular, a microstrip LWA [14] derived from the Menzel antenna [15] was considered and designed using the method proposed in [16].…”

Section: Large Em Penetration Employing Leaky-wave Antennasmentioning

confidence: 99%

“…[14], but this value was not sufficient for deep-penetration. Therefore in [13] the design of the antenna was optimised for deep penetration, obtaining β 1n = 1.0028 at a maximum radiation angle of 45 • . This value, according to Eqs.…”

Section: Large Em Penetration Employing Leaky-wave Antennasmentioning

confidence: 99%

“…(12)- (13) of [4] allowed the deep-penetration condition on a medium with conductivity σ 2 = 0.05 S/m. While we cannot exclude the possibility of realizing a conventional LWA [8], [17] that may provide even higher amplitudes of attenuation and phase vectors, the design proposed in [13] shows evident limits in the deep penetration achievable by means of a uniform LWA. Therefore, we propose a different, innovative approach that promises better results.…”

Section: Large Em Penetration Employing Leaky-wave Antennasmentioning

confidence: 99%

“…In numerical simulations reflections can be neglected choosing suitable values for the medium characteristics of the lossy prism. A similar approach was taken in [11], [13], where unitary values for both permittivity and permeability of the lossy medium were chosen, and the conductivity σ was assumed sufficiently low (σ = 0.05 S/m). This kind of medium adaptation is useful in numerical simulations, because it allows to isolate the transmission problem from the reflection problem, but such an approach may result in strong restrictions on the prototyping and manufacturing processes of the lossy prism.…”

Section: The Lossy Prismmentioning

confidence: 99%

“…As a consequence, the structure proposed in this paper is designed to radiate in a vacuum. The amplitude of the phase vector generated by this structure is compared against the one obtained in [13] (that was also designed to radiate in a vacuum). A higher value of the phase vector, for a given incidence angle, implies higher penetration.…”

Section: The Lossy Prismmentioning

confidence: 99%

See 4 more Smart Citations

Analytical Investigation on a New Approach for Achieving Deep Penetration in a Lossy Medium: The Lossy Prism

Frezza

Simeoni²,

Tedeschi³

2017

JTIT

View full text Add to dashboard Cite

Abstract-Recent studies highlighted deep-penetration properties of inhomogeneous waves at the interface between a lossless and a lossy medium. Such waves can be generated by means of radiating structures known as Leaky-Wave Antennas (LWAs). Here, a different approach is proposed based on the use of a lossy prism capable to generate an inhomogeneous wave when illuminated by a homogeneous wave. The lossy prism is conceived and designed thinking of GroundPenetrating Radar (GPR). The results achieved by the lossy prism will be compared with those obtained by means of a previously designed LWA that was created with the identical objective. The approach of this paper is purely theoretical, and it aims at providing basic ideas and preliminary results useful for an innovative LWA design.

show abstract

Section: Large Em Penetration Employing Leaky-wave Antennasmentioning

confidence: 99%

Section: Large Em Penetration Employing Leaky-wave Antennasmentioning

confidence: 99%

Section: Large Em Penetration Employing Leaky-wave Antennasmentioning

confidence: 99%

Section: The Lossy Prismmentioning

confidence: 99%

Section: The Lossy Prismmentioning

confidence: 99%

See 3 more Smart Citations

Analytical Investigation on a New Approach for Achieving Deep Penetration in a Lossy Medium: The Lossy Prism

Frezza

Simeoni²,

Tedeschi³

2017

JTIT

View full text Add to dashboard Cite

show abstract

Verification of the electromagnetic deep-penetration effect in the real world

Baccarelli

Calcaterra

Frezza

et al. 2021

Sci Rep

View full text Add to dashboard Cite

The deep penetration of electromagnetic waves into lossy media can be obtained by properly generating inhomogeneous waves. In this work, for the very first time, we demonstrate the physical implementation and the practical relevance of this phenomenon. A thorough numerical investigation of the deep-penetration effects has been performed by designing and comparing three distinct practical radiators, emitting either homogeneous or inhomogeneous waves. As concerns the latter kind, a typical Menzel microstrip antenna is first used to radiate improper leaky waves. Then, a completely new approach based on an optimized 3-D horn TEM antenna applied to a lossy prism is described, which may find applications even at optical frequencies. The effectiveness of the proposed radiators is measured using different algorithms to consider distinct aspects of the propagation in lossy media. We finally demonstrate that the deep penetration is possible, by extending the ideal and theoretical evidence to practical relevance, and discuss both achievements and limits obtained through numerical simulations on the designed antennas.

show abstract

Numerical Evaluation of Electromagnetic-wave Penetration at Normal Incidence through an Inhomogeneous-wave Approach

Calcaterra¹,

Frezza²,

Simeoni³

et al. 2018

JTIT

View full text Add to dashboard Cite

Abstract-This paper presents numerical scenarios concerning penetration in a lossy medium that can be obtained by radiating inhomogeneous electromagnetic waves. Former papers approached this problem, both analytically and numerically, finding requirements and limits of the so-called "deeppenetration" condition, which consists of a wave transmitted in a lossy medium having an attenuation vector whose direction forms the angle of ninety degrees with the normal to the separation surface. The deep-penetration condition always requires an oblique incidence, therefore is not practical in many applications. For this reason, we are interested here in finding whether an inhomogeneous wave guarantees larger penetration than the one obtainable with homogeneous waves, even when the incident wave is normal to the separation surface between two media, i.e. when the deep-penetration condition is not satisfied. We are also interested in verifying numerically whether the lossy-prism structure may achieve larger penetration than the one obtainable through traditional leakywave antennas, and we also wish to propose a lossy-prism design more realistic than the one previously presented in the literature.

show abstract

Inhomogeneous wave penetration in lossy media

Cited by 3 publications

References 5 publications

Analytical Investigation on a New Approach for Achieving Deep Penetration in a Lossy Medium: The Lossy Prism

Analytical Investigation on a New Approach for Achieving Deep Penetration in a Lossy Medium: The Lossy Prism

Verification of the electromagnetic deep-penetration effect in the real world

Numerical Evaluation of Electromagnetic-wave Penetration at Normal Incidence through an Inhomogeneous-wave Approach

Contact Info

Product

Resources

About