Fractal antennas: An historical perspective

J Anguera, A Andújar, J Jayasinghe… - Fractal and …, 2020‏ - mdpi.com
Fractal geometry has been proven to be useful in several disciplines. In the field of antenna
engineering, fractal geometry is useful to design small and multiband antenna and arrays …

Planar achiral metasurfaces-induced anomalous chiroptical effect of optical spin isolation

AS Rana, I Kim, MA Ansari, MS Anwar… - … Applied Materials & …, 2020‏ - ACS Publications
Planar chiral structures respond differently for oppositely handed incident light, and thus can
produce extraordinary chiroptical effects such as circular conversion dichroism (CCD) and …

Broadband asymmetric transmission of linearly polarized electromagnetic waves based on chiral metamaterial

L Stephen, N Yogesh, V Subramanian - Journal of Applied Physics, 2018‏ - pubs.aip.org
The giant optical activity of chiral metamaterials (CMMs) holds great potential for tailoring the
polarization state of an electromagnetic (EM) wave. In controlling the polarization state, the …

Miniaturization of 3-D anistropic zero-refractive-index metamaterials with application to directive emissions

HX Xu, GM Wang, T Cai - IEEE transactions on antennas and …, 2014‏ - ieeexplore.ieee.org
Several strategies are explored for the first time toward the miniaturization of three-
dimensional (3-D) anistropic zero-refractive-index metamaterials (AZIM). By incorporating …

Reciprocal circular polarization handedness conversion using chiral metamaterials

O Fernández, A Gomez… - IEEE Antennas and …, 2017‏ - ieeexplore.ieee.org
Chiral metamaterials (CMMs) are widely used to implement devices that transform the
polarization of an incident electromagnetic wave, such as polarization rotators and linear to …

Wideband and high-efficiency planar chiral structure design for asymmetric transmission and linear polarization conversion

F Long, S Yu, N Kou, C Zhang, Z Ding… - Journal of Applied …, 2020‏ - pubs.aip.org
The phenomenon of asymmetric transmission (AT) means the existence of a giant difference
in transmittance after the incident waves pass through the special slab in two opposite …

Polarization Plane Rotation by Arbitrary Angle Using Symmetrical Structures

N Kolmakova, S Prikolotin, A Perov… - IEEE Transactions …, 2015‏ - ieeexplore.ieee.org
A compact waveguide polarization rotator, able to turn the polarization plane by an arbitrary
angle, is proposed. Its operational principle is based on a strong electromagnetic coupling …

[HTML][HTML] Highly efficient polarization converter with wide angular stability

C Ghobadi, M Karamirad, J Nourinia - Scientific Reports, 2025‏ - nature.com
This paper presents a multi-band polarization converter using spoof surface plasmon
polaritons (SSPP), addressing the growing demand for efficient polarization control in …

Cross polarization converter formed by rotated-arm-square chiral metamaterial

R Rajkumar, N Yogesh, V Subramanian - Journal of Applied Physics, 2013‏ - pubs.aip.org
Optical activity and cross polarization conversion (CPC) of a rotated-arm-square chiral
metamaterial (CMM) is reported in this work. Proposed CMM shows strong chirality owing to …

Dual-band circular polarizer and asymmetric spectrum filter using ultrathin compact chiral metamaterial

HX Xu, GM Wang, MQ Qi, T Cai - Progress In Electromagnetics Research, 2013‏ - jpier.org
A compact chiral metamaterial is proposed and comprehensively investigated that can
achieve circularly polarized wave emission from linearly polarized incident wave (giant …