scispace - formally typeset
Journal ArticleDOI

Reflection phase characterizations of the EBG ground plane for low profile wire antenna applications

Reads0
Chats0
TLDR
In this article, the authors focus on the reflection phase feature of EBG surfaces, which can be used to identify the input-match frequency band inside of which a low profile wire antenna exhibits a good return loss.
Abstract
Mushroom-like electromagnetic band-gap (EBG) structures exhibit unique electromagnetic properties that have led to a wide range of electromagnetic device applications. This paper focuses on the reflection phase feature of EBG surfaces: when plane waves normally illuminate an EBG structure, the phase of the reflected field changes continuously from 180/spl deg/ to -180/spl deg/ versus frequency. One important application of this feature is that one can replace a conventional perfect electric conductor (PEC) ground plane with an EBG ground plane for a low profile wire antenna design. For this design, the operational frequency band of an EBG structure is defined as the frequency region within which a low profile wire antenna radiates efficiently, namely, having a good return loss and radiation patterns. The operational frequency band is the overlap of the input-match frequency band and the surface-wave frequency bandgap. It is revealed that the reflection phase curve can be used to identify the input-match frequency band inside of which a low profile wire antenna exhibits a good return loss. The surface-wave frequency bandgap of the EBG surface that helps improve radiation patterns is very close to its input-match frequency band, resulting in an effective operational frequency band. In contrast, a thin grounded slab cannot work efficiently as a ground plane for low profile wire antennas because its surface-wave frequency bandgap and input-match frequency band do not overlap. Parametric studies have been performed to obtain design guidelines for EBG ground planes. Two novel EBG ground planes with interesting electromagnetic features are also presented. The rectangular patch EBG ground plane has a polarization dependent reflection phase and the slotted patch EBG ground plane shows a compact size.

read more

Content maybe subject to copyright    Report

Citations
More filters
Proceedings ArticleDOI

A low-profile dual-band antenna loaded with the AMC surface

TL;DR: In this article, a low profile dual-band antenna with an AMC surface is proposed, which can offer an impedance band from 2.25 GHz to 2.60 GHz and 5.00 GHz to 5.36 GHz when the S11 is larger than 10dB.

Comparison between Two Methods for Directivity Enhancement of Antennas through 2-D EBGs

TL;DR: In this paper, the authors compare the performance of two-dimensional EBG structures, consisting of either triangular or square arrangements of dielectric cylinders, excited by a 8GHz, TM-polarized, line source.

Miniaturisedmultibandpifaantenna usinga frequency selectivesurface(fss) ground plane

TL;DR: In this article, a low-cost, easily fabricated, miniaturized multiband PIFAantenna with a frequency selective surface (FSS) asabottom layer is presented.
Journal ArticleDOI

Perturbation method to study scattering from a dielectric-chiral rough interface

TL;DR: In this article, an extension of the problem of reflection from a flat dielectric-chiral interface is presented, where a dielectricschiral rough interface is assumed and scattered field is calculated using small perturba...
Proceedings ArticleDOI

Structural modification of mushroom EBG for wider band gap, reduced design complexity and compactness

TL;DR: In this article, a modified EBG structure with wider band gap and compact size is proposed to suppress side lobe levels and is utilized to enhance such antenna performance, but it significantly enlarges overall antenna size.
References
More filters
Journal ArticleDOI

Negative Refraction Makes a Perfect Lens

TL;DR: The authors' simulations show that a version of the lens operating at the frequency of visible light can be realized in the form of a thin slab of silver, which resolves objects only a few nanometers across.
Journal ArticleDOI

Experimental Verification of a Negative Index of Refraction

TL;DR: These experiments directly confirm the predictions of Maxwell's equations that n is given by the negative square root ofɛ·μ for the frequencies where both the permittivity and the permeability are negative.
Journal ArticleDOI

High-impedance electromagnetic surfaces with a forbidden frequency band

TL;DR: In this paper, a new type of metallic structure has been developed that is characterized by having high surface impedance, which is analogous to a corrugated metal surface in which the corrugations have been folded up into lumped-circuit elements and distributed in a two-dimensional lattice.
Proceedings Article

Photonic crystals

TL;DR: In this paper, the authors describe photonic crystals as the analogy between electron waves in crystals and the light waves in artificial periodic dielectric structures, and the interest in periodic structures has been stimulated by the fast development of semiconductor technology that now allows the fabrication of artificial structures, whose period is comparable with the wavelength of light in the visible and infrared ranges.
Related Papers (5)