scholarly journals Optical Yagi-Uda nanoantennas

Nanophotonics ◽  
2012 ◽  
Vol 1 (1) ◽  
pp. 65-81 ◽  
Author(s):  
Ivan S. Maksymov ◽  
Isabelle Staude ◽  
Andrey E. Miroshnichenko ◽  
Yuri S. Kivshar
Keyword(s):  
Radio Frequency ◽  
Optical Communications ◽  
Light Emission ◽  
Antenna Design ◽  
Photovoltaic Devices ◽  
Nonclassical Light ◽  
High Permittivity ◽  
Nanometer Size ◽  
Nanophotonic Circuits ◽  
Optical Nanoantennas

AbstractConventional antennas, which are widely employed to transmit radio and TV signals, can be used at optical frequencies as long as they are shrunk to nanometer-size dimensions. Optical nanoantennas made of metallic or high-permittivity dielectric nanoparticles allow for enhancing and manipulating light on the scale much smaller than wavelength of light. Based on this ability, optical nanoantennas offer unique opportunities regarding key applications such as optical communications, photovoltaics, nonclassical light emission, and sensing. From a multitude of suggested nanoantenna concepts the Yagi-Uda nanoantenna, an optical analogue of the well-established radio-frequency Yagi-Uda antenna, stands out by its efficient unidirectional light emission and enhancement. Following a brief introduction to the emerging field of optical nanoantennas, here we review recent theoretical and experimental activities on optical Yagi-Uda nanoantennas, including their design, fabrication, and applications. We also discuss several extensions of the conventional Yagi-Uda antenna design for broadband and tunable operation, for applications in nanophotonic circuits and photovoltaic devices.

scholarly journals Inverted F Type Antenna Design for the Cattle Activity and Estrus Detection Sensor Module

2020 ◽  
Vol 11 (1) ◽  
pp. 298
Author(s):  
Youchung Chung
Keyword(s):  
Radio Frequency ◽  
Return Loss ◽  
Antenna Design ◽  
Sensor Module ◽  
Estrus Detection ◽  
Communication Module ◽  
Frequency Module ◽  
Rf Transmission ◽  
Main Station

In this paper, an inverted F type antenna (IFA) for ZigBee communication of a sensor board has been designed and optimized, and it replaces the chip antenna on an RF (Radio Frequency) module that is not performing well enough for the ZigBee communication. The sensor board detects cattle behavior and identifies the breeding (estrus) period and transmits the data to the main station by the RF (Radio Frequency) module and IFA antenna. The proposed and optimized TRx (transmitting/receiving) IFA antenna of the ZigBee communication module has a return loss of −19 dB and a gain of 1.6 dB at 2.45 GHz. The size is about 2.5 × 0.5 cm in width and vertical length, and the height is 0.55 cm. The strength of signals with the chip antenna and the IFA antenna have been measured and compared. There is about a 20 dB enhancement with the IFA antenna compared to the chip antenna. The antenna is designed and applied to the RF transmission and reception (TRx) module. This antenna and sensor module can be applied to livestock in general as well as cattle.

Stochastic model of nonclassical light emission from a microcavity

1998 ◽  
Vol 57 (3) ◽  
pp. 2046-2055 ◽  
Author(s):  
Seiji Miyashita ◽  
Hiromi Ezaki ◽  
Eiichi Hanamura
Keyword(s):  
Stochastic Model ◽  
Light Emission ◽  
Nonclassical Light

Multi-factor product authentication using integrated Quick Response (QR) code pixelated antenna

2017 ◽  
Vol 2017 (1) ◽  
pp. 000608-000612
Author(s):  
John Doroshewitz ◽  
Amanpreet Kaur ◽  
Jeffrey Nanzer ◽  
Premjeet Chahal
Keyword(s):  
Genetic Algorithm ◽  
Radio Frequency ◽  
Design Process ◽  
Patch Antenna ◽  
Microstrip Patch Antenna ◽  
Antenna Design ◽  
Qr Code ◽  
Quick Response ◽  
Microstrip Patch

Abstract A Quick Response (QR) Code style antenna is presented. Such an antenna can provide two-level authentication, both optically through the current QR technology, plus a radio frequency (RF) signature from microstrip patch antenna designed from the QR signature using copper patterning. The antenna is designed through the pixilation of a patch antenna where conductor is present in the dark regions of the optical QR code. The QR based antenna design has a unique frequency and radiation signature and can be used for RF authentication of products. The design process for the pixilation is presented as well as fabrication and measured results of a QR code antenna design. The possibility of using a Genetic Algorithm to create a “library” of acceptable antenna results in accordance with the QR data it represents is also discussed.

Enhancing Magnetic Light Emission with Optical Nanoantennas

2019 ◽  
Author(s):  
Maria Sanz-Paz ◽  
Maria F. Garcia-Parajo ◽  
Sebastien Bidault ◽  
Mathieu Mivelle ◽  
Cyrine Ernandes ◽  
...  
Keyword(s):  
Light Emission ◽  
Optical Nanoantennas

scholarly journals A broadband tapered nanocavity for efficient nonclassical light emission

2016 ◽  
Vol 24 (18) ◽  
pp. 20904 ◽  
Author(s):  
Niels Gregersen ◽  
Dara P. S. McCutcheon ◽  
Jesper Mørk ◽  
Jean-Michel Gérard ◽  
Julien Claudon
Keyword(s):  
Light Emission ◽  
Nonclassical Light

scholarly journals Design of a miniaturized wideband disc monopole antenna used in RFID systems

2021 ◽  
Vol 21 (2) ◽  
pp. 994
Author(s):  
Sufyan Hazzaa Ali ◽  
Ahmed Hameed Reja ◽  
Yousif Azzawi Hachim
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Microstrip Antenna ◽  
Substrate Material ◽  
Antenna Design ◽  
Automatic Identification ◽  
Network Analyzer ◽  
Rfid Technology ◽  
Dielectric Thickness ◽  
Frequency Identification

Radio-frequency identification (RFID) is an important wireless technology which utilizes radio frequencies (RFs) for exchanging data between two or more points (tags and readers), that represent an automatic identification (Auto-ID) system. This paper introduces an omnidirectional microstrip antenna operates at 2.45 GHz used for a radio-frequency identification (RFID) technology. The length of the proposed antenna is 36.5 mm and the width is 27 mm. The substrate material which has been used as a base of antenna is FR4 that has dielectric constant value of 4.3 and dielectric thickness value of 1.6 mm. Regarding the resonance frequency, return loss of the proposed antenna design is -34.8 dB. A promising directivity outcome of 2.8 dB has been achieved with omnidirectional radiation pattern as well as an acceptable efficiency of 66%. The proposed antenna design accomplishes a wideband frequency of 1.21 GHz in the frequency range of (2.14  3.35) GHz. The computer simulation technology (CST) microwave studio software has been used for implementing the proposed antenna design. The antenna design fabricatation and its characteristics have been measured using vector network analyzer (type MS4642A). The obtained results of the experimental design achieve a little bit differences as compared with the simulation results

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