High-performance microwave photonic true time delays based on an integrated optical micro-comb source

2019 ◽  
Author(s):  
Jiayang Wu ◽  
Xingyuan Xu ◽  
Mengxi Tan ◽  
Thach Nguyen ◽  
Sai Tak Chu ◽  
...  
Keyword(s):  
Time Delays ◽  
High Performance ◽  
Microwave Photonic ◽  
Integrated Optical ◽  
True Time

Photonic microwave true time delays for phased array antennas using a 49  GHz FSR integrated optical micro-comb source [Invited]

2018 ◽  
Vol 6 (5) ◽  
pp. B30 ◽  
Author(s):  
Xingyuan Xu ◽  
Jiayang Wu ◽  
Thach G. Nguyen ◽  
Tania Moein ◽  
Sai T. Chu ◽  
...  
Keyword(s):  
Time Delays ◽  
Phased Array ◽  
Phased Array Antennas ◽  
Array Antennas ◽  
Integrated Optical ◽  
True Time

scholarly journals A Review on the Development of Rotman Lens Antenna

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Shruti Vashist ◽  
M. K. Soni ◽  
P. K. Singhal
Keyword(s):  
High Performance ◽  
Beam Steering ◽  
Phase Error ◽  
Antenna System ◽  
Surveillance Systems ◽  
Electronic Warfare ◽  
Design Concepts ◽  
Low Profile ◽  
True Time ◽  
The One

Rotman lenses are the beguiling devices used by the beamforming networks (BFNs). These lenses are generally used in the radar surveillance systems to see targets in multiple directions due to its multibeam capability without physically moving the antenna system. Now a days these lenses are being integrated into many radars and electronic warfare systems around the world. The antenna should be capable of producing multiple beams which can be steered without changing the orientation of the antenna. Microwave lenses are the one who support low-phase error, wideband, and wide-angle scanning. They are the true time delay (TTD) devices producing frequency independent beam steering. The emerging printed lenses in recent years have facilitated the advancement of designing high performance but low-profile, light-weight, and small-size and networks (BFNs). This paper will review and analyze various design concepts used over the years to improve the scanning capability of the lens developed by various researchers.

The Formation of Plasma Acid at Atmospheric Pressure and its Application in Hydrolysis of Microcrystalline Cellulose

2013 ◽  
Vol 750-752 ◽  
pp. 1626-1629
Author(s):  
Bo Yuan ◽  
Ying Wang ◽  
Ying Chao Ji ◽  
Qiu Hong Wang
Keyword(s):  
Microcrystalline Cellulose ◽  
Atmospheric Pressure ◽  
High Performance ◽  
Barrier Discharge ◽  
Ph Value ◽  
Reducing Sugar ◽  
Dielectric Barrier ◽  
Integrated Optical ◽  
Hydrolysis Of ◽  
Single Factor Experiment

In this paper, plasma acid was obtained by treating distilled water with dielectric barrier discharge at atmospheric pressure in order to hydrolyze cellulose. The acidity of plasma acid was studied through a single factor experiment. A plasma acid with pH value of 1.42 was obtained and used to hydrolyze microcrystalline cellulose at 80°C for 60min. Under this condition, the integrated optical density (IOD) of the hydrolysis sample was 0.589. Based on standard glucose curve, the total reducing sugar (TRS) was calculated to be 53.75mg and the TRS yield was 53.75%. The filtrate was evaporated to get the solid hydrolysis sample to be analyzed by High-performance liquid chromatography (HPLC). The results showed that the sample mainly consisted of glucose, which proved that microcrystalline cellulose could be hydrolyzed by plasma acid. Therefore, it could be concluded that it was an environmentally friendly and economical method to hydrolyze the microcrystalline cellulose by plasma acid.

Integrated Optical True Time Delay Module Based on Optical Wavelength Router

2017 ◽  
Vol 37 (2) ◽  
pp. 0223001
Author(s):  
陈 阳 Chen Yang ◽  
郎婷婷 Lang Tingting ◽  
何建军 He Jianjun
Keyword(s):  
Time Delay ◽  
Wavelength Router ◽  
Optical Wavelength ◽  
True Time Delay ◽  
Integrated Optical ◽  
True Time

Parity-Time and anti-Parity-Time-Symmetry Integrated Optical Gyroscopes: A Perspective for High Performance Devices

2020 ◽  
Author(s):  
Vittorio M. N. Passaro ◽  
Martino de Carlo ◽  
Francesco de Leonardis ◽  
Giansergio Menduni ◽  
Luciano Lamberti ◽  
...  
Keyword(s):  
High Performance ◽  
Time Symmetry ◽  
Integrated Optical
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