Low-loss large-bandwidth fiber-chip edge couplers on a SOI platform

2020 ◽  
Author(s):  
Xuhan Guo ◽  
An He ◽  
Yong Zhang ◽  
Yikai Su
Keyword(s):  
Low Loss ◽  
Large Bandwidth

Design, Fabrication and Test of Modified Septum Antennas for Satellite Telecommunication

Frequenz ◽  
2018 ◽  
Vol 72 (7-8) ◽  
pp. 301-313 ◽  
Author(s):  
Mohammad Fazaelifar ◽  
Shahrokh Jam ◽  
Raheleh Basiri ◽  
H. Reza Azadi
Keyword(s):  
Axial Ratio ◽  
Beam Width ◽  
Center Frequency ◽  
Low Loss ◽  
Ground Station ◽  
Large Bandwidth ◽  
Low Weight ◽  
Measurement Results ◽  
Novel Design ◽  
Better Than

Abstract In this paper at first, the ordinary septum polarizer has been designed and used for parabolic reflector feed in Ground station antenna. Next, a novel design of modified septum polarizer with wider beam-width is proposed for satellite antenna. Compactness, low weight, large bandwidth, high TX/RX isolation, low axial ratio as well as low loss are the advantages of the septum polarizer. The designed antenna has high purity circular polarization ( $\left| {AR} \right| \le 1.6dB$ ) and low return loss. The frequency bandwidth of the antenna is about 27 % in the center frequency 11 GHz and the TX/RX isolation is better than 32 dB. Finally the septum polarizer, modified septum polarizer and reflector are fabricated and tested and there were good agreement between simulation and measurement results.

Low Loss, Large Bandwidth Antiresonant Hollow-Core Fiber Design for Short-Reach Links

2020 ◽  
Author(s):  
William Shere ◽  
Gregory T. Jasion ◽  
Eric Numkam Fokoua ◽  
Francesco Poletti
Keyword(s):  
Hollow Core ◽  
Low Loss ◽  
Large Bandwidth ◽  
Fiber Design ◽  
Core Fiber

Large-bandwidth, low-loss, efficient mode mixing using long-period mechanical gratings

2017 ◽  
Vol 42 (18) ◽  
pp. 3594 ◽  
Author(s):  
Bin Huang ◽  
Haoshuo Chen ◽  
Nicolas K Fontaine ◽  
Roland Ryf ◽  
Ian Giles ◽  
...  
Keyword(s):  
Low Loss ◽  
Long Period ◽  
Large Bandwidth ◽  
Mode Mixing

Applications of Electromagnetic Bandgap Structure in Microwave Photonics

2019 ◽  
pp. 1-24
Author(s):  
Arpan Deyasi ◽  
Pampa Debnath ◽  
Siddhartha Bhattacharyya
Keyword(s):  
Low Cost ◽  
Optoelectronic Devices ◽  
Microwave Photonics ◽  
Physical Realization ◽  
Electromagnetic Bandgap ◽  
Low Loss ◽  
Large Bandwidth ◽  
Thz Applications ◽  
The Physical Realization ◽  
Electromagnetic Bandgap Structure

Microwave photonics is the arena of research in the 21st century due to ever-increasing ultra-large bandwidth and the meticulous availability of data with very low cost. In this context, conventional optoelectronic devices are replaced by novel photonic counterparts, both in transreceiver design as well as devices and systems. The major objective of this replacement is to reduce noise by means of lower scattering, where photons are only responsible for propagation of electromagnetic wave. With introduction of novel materials, low-loss communication system can now be designed at beyond THz range, mainly due to the physical realization of electromagnetic bandgap structure. This chapter is extended towards plasmonics with the intension of making sensors for beyond THz applications.

scholarly journals Realization of trophy shaped flexible wearable antenna based on foam substrate

2018 ◽  
Vol 7 (2.12) ◽  
pp. 222
Author(s):  
Reema Dubey ◽  
Vinod Kumar Singh ◽  
Akash Kumar Bhoi ◽  
Zakir Ali
Keyword(s):  
Dielectric Constant ◽  
Reflection Coefficient ◽  
Loss Tangent ◽  
Low Dielectric Constant ◽  
Polystyrene Foam ◽  
Low Loss ◽  
Wearable Antenna ◽  
Low Dielectric ◽  
Large Bandwidth ◽  
Flexible Antenna

The endeavor of this paper is to analyze a light weighted flexible antenna for modern communication system. There are three different patch designs with operating frequency 4GHz. These proposed antennas are compact in size, shows high directivity and large bandwidth. Ex-pandable polystyrene foam is used as a substrate because such antenna are bendable, wearable, cheap, require less attention and having good features like low dielectric constant, low loss tangent and better efficiency. The antenna parameters like reflection coefficient, gain, band-width, radiation pattern are analyzed. The reflection coefficient of anticipated antenna provides a good concurrence between simulated and measured result. Foam based design is simulated by using CST studio. 

Large-bandwidth ultra-low-loss guiding in bi-periodic photonic crystal waveguides

2004 ◽  
Vol 79 (4) ◽  
pp. 409-414 ◽  
Author(s):  
A. Jafarpour ◽  
E. Chow ◽  
C.M. Reinke ◽  
J. Huang ◽  
A. Adibi ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Waveguides ◽  
Low Loss ◽  
Large Bandwidth

Low Loss, Large Bandwidth Fiber-Chip Edge Couplers Based on Silicon-on-Insulator Platform

2020 ◽  
Vol 38 (17) ◽  
pp. 4780-4786
Author(s):  
An He ◽  
Xuhan Guo ◽  
Kangnian Wang ◽  
Yong Zhang ◽  
Yikai Su
Keyword(s):  
Silicon On Insulator ◽  
Low Loss ◽  
Large Bandwidth

scholarly journals IF Fiber Optics and Digital Correlating Spectrometer on the JCMT-CSO Interferometer

1994 ◽  
Vol 140 ◽  
pp. 117-118
Author(s):  
O.P. Lay ◽  
R.E. Hills ◽  
J. Carlstrom
Keyword(s):  
Spectral Line ◽  
Fiber Optics ◽  
Delay Line ◽  
Fiber Optic ◽  
Coaxial Cable ◽  
Delay Lines ◽  
Low Loss ◽  
Line System ◽  
Large Bandwidth ◽  
Electrical Interference

This paper describes the delay lines designed and built for the JCMT-CSO submillimeter interferometer located on the summit of Mauna Kea, Hawaii and described in the paper by Carlstrom et al. in these proceedings.One of the major features of the project is the use of fiber optics instead of coaxial cable to bring the IF signals (l-2GHz) from the receivers to the spectral line correlator via a set of fiber optic delay lines. Optical fiber now has many advantages over coax including very large bandwidth, low loss, economical cost and size and immunity to electrical interference.Soares et al. (these proceedings) describe a delay line system that can be used with a broadband continuum correlator requiring very fine delay steps The JCMT-CSO interferometer was intended to be used primarily with a digital correlating spectrometer that has a range of built-in delays, greatly easing the demand on delay line resolution.

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