scholarly journals Implementation of Resonant Electric Based Metamaterials for Electromagnetic Wave Manipulation at Microwave Frequencies

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8452
Author(s):  
Stylianos D. Assimonis ◽  
Sandhya Chandravanshi ◽  
Okan Yurduseven ◽  
Dmitry Zelenchuk ◽  
Oleksandr Malyuskin ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Microwave Frequency ◽  
Wireless Power ◽  
Microwave Frequencies ◽  
Wireless Applications ◽  
Cell Structures ◽  
Reflecting Surfaces ◽  
Single Pixel ◽  
Sub Wavelength ◽  
Transmission And Reflection

In this paper, we present the application of a resonant electric based metamaterial element and its two-dimensional metasurface implementation for a variety of emerging wireless applications. Metasurface apertures developed in this work are synthesized using sub-wavelength sampled resonant electric-based unit-cell structures and can achieve electromagnetic wave manipulation at microwave frequencies. The presented surfaces are implemented in a variety of forms, from absorption surfaces for energy harvesting and wireless power transfer to wave-chaotic surfaces for compressive sensing based single-pixel direction of arrival estimation and reflecting surfaces. It is shown that the resonant electric-synthesized metasurface concept offers a significant potential for these applications with high fidelity absorption, transmission and reflection characteristics within the microwave frequency spectrum.

CLASSICAL ELECTROMAGNETICALLY-INDUCED TRANSPARENCY-LIKE SWITCHING CONTROLLED BY POLARIZATION IN METAMATERIALS

2013 ◽  
Vol 22 (01) ◽  
pp. 1350004 ◽  
Author(s):  
XING RI JIN ◽  
JINWOO PARK ◽  
HAIYU ZHENG ◽  
YOUNGPAK LEE ◽  
JOO YULL RHEE ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Electromagnetically Induced Transparency ◽  
Microwave Frequency ◽  
Dielectric Substrate ◽  
Frequency Region ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Incident Electromagnetic Wave ◽  
Induced Transparency

The classical electromagnetically-induced transparency (EIT)-like switching in metamaterials was experimentally demonstrated in the microwave-frequency region. The metameterial unit cell consists of two identical split-ring resonators, which are arranged on both sides of a dielectric substrate with 90°-rotation asymmetry. In our scheme, the classical EIT-like switching can be achieved by changing the polarization of the incident electromagnetic wave.

scholarly journals A Compact 5.5 GHz Band-Rejected UWB Antenna Using Complementary Split Ring Resonators

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
M. M. Islam ◽  
M. R. I. Faruque ◽  
M. T. Islam
Keyword(s):  
Ground Plane ◽  
Substrate Material ◽  
Ring Resonators ◽  
Uwb Antenna ◽  
Split Ring ◽  
Microwave Frequencies ◽  
Split Ring Resonators ◽  
Wireless Applications ◽  
Low Dielectric ◽  
Compact Dimension

A band-removal property employing microwave frequencies using complementary split ring resonators (CSRRs) is applied to design a compact UWB antenna wishing for the rejection of some frequency band, which is meanwhile exercised by the existing wireless applications. The reported antenna comprises optimization of a circular radiating patch, in which slotted complementary SRRs are implanted. It is printed on low dielectric FR4 substrate material fed by a partial ground plane and a microstrip line. Validated results exhibit that the reported antenna shows a wide bandwidth covering from 3.45 to more than 12 GHz, with a compact dimension of 22 × 26 mm2, and VSWR < 2, observing band elimination of 5.5 GHz WLAN band.

Sub-wavelength transmission and reflection mode tabletop imaging with 13nm illumination via ptychography CDI

2017 ◽  
Author(s):  
Michael Tanksalvala ◽  
Christina L. Porter ◽  
Dennis F. Gardner ◽  
Michael Gerrity ◽  
Giulia F. Mancini ◽  
...  
Keyword(s):  
Reflection Mode ◽  
Sub Wavelength ◽  
Transmission And Reflection

The Effect of Drop-Size Distribution Variability on Radiometric Estimates of Rainfall Rates for Frequencies from 3 to 10 GHz

1991 ◽  
Vol 30 (7) ◽  
pp. 1025-1033 ◽  
Author(s):  
A. R. Jameson
Keyword(s):  
Absorption Coefficient ◽  
Size Distribution ◽  
Drop Size ◽  
Radiative Transfer Equation ◽  
Microwave Frequency ◽  
Drop Size Distribution ◽  
Rainfall Rate ◽  
Field Of View ◽  
Ice Clouds ◽  
Microwave Frequencies

Abstract The substantial upwelling microwave radiation emitted by rain, as well as the relative simplicity of radiometers, guarantees their continuing important role in measuring rain from space. However, for frequencies greater than around 20 GHz, ice clouds overlying rain often scatter much of the upwelling radiation out of the field of view. In addition, at these frequencies raindrops scatter so well that oven when a few more are added to an already low concentration of drops, the additional drops actually scatter away more radiation than they contribute to the field of view. Because of these two effects, the direct measurement of rainfall rate at high microwave frequencies using upwelling radiation is restricted to low rainfall rates. In contrast, from 3 to 10 GHz emissions from raindrops and from clouds dominate the radiative transfer equation. Because emission and absorption are reciprocal, the combined absorption coefficient of the cloud and the rain can be estimated from the upwelling radiation at these frequencies. After extracting the component due to rain (ka), it may be used to estimate the rainfall rate ξ(R). It is important, therefore, that R depend as strongly as possible on ka. The physical link between R and ka varies depending upon the microwave frequency. The weaker the relation the more sensitive ka and ξ(R) are to variations in the drop-size distribution. In this study it is shown that the scatter in ka and ξ(R), in response to variations in the drop-size distribution, is greatest at 8 and smallest at 3 GHz.

scholarly journals The first family of application-specific integrated circuits for programmable metasurfaces

2021 ◽  
Author(s):  
Loukas Petrou ◽  
Kypros Kossifos ◽  
Marco Antoniades ◽  
Julius Georgiou
Keyword(s):  
Integrated Circuits ◽  
Electromagnetic Waves ◽  
Low Cost ◽  
Microwave Frequencies ◽  
Digital Devices ◽  
Application Specific Integrated Circuits ◽  
Control Circuits ◽  
User Friendly ◽  
Application Specific ◽  
Sub Wavelength

Abstract Reconfigurable metasurfaces are man-made surfaces, which consist of sub-wavelength periodic elements - meta-atoms - that can be reconfigured to manipulate incoming electromagnetic waves. However, reconfigurable metasurfaces developed to-date, have limitations in terms of impedance range, reconfiguration delay and power consumption. Also, these systems are costly and they require bulky electronics and complex control circuits, which makes them unattractive for commercial use. Here, we report the first family of CMOS application-specific integrated circuits (ASICs) that enable microsecond and microwatt reconfiguration of complex impedances at microwave frequencies. Our approach utilizes asynchronous digital control circuitry, with networking capabilities, allowing simple and fast reconfiguration via digital devices and user-friendly software. Our solution is low-cost and can cover arbitrary metasurfaces, with different sizes and shapes.

Sign in / Sign up

Export Citation Format

Share Document