Development of a high-speed modulator for a W-band millimetre-wave imaging system

2009 ◽  
Author(s):  
Peng Yao ◽  
Christopher A. Schuetz ◽  
Shouyuan Shi ◽  
Julien Macario ◽  
Rownak Shireen ◽  
...  
Keyword(s):  
High Speed ◽  
Imaging System ◽  
Millimetre Wave ◽  
W Band ◽  
Wave Imaging

W-band beam-steerable MEMS-based reflectarray

2011 ◽  
Vol 3 (5) ◽  
pp. 521-532 ◽  
Author(s):  
Simone Montori ◽  
Elisa Chiuppesi ◽  
Paola Farinelli ◽  
Luca Marcaccioli ◽  
Roberto Vincenti Gatti ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Imaging System ◽  
Elementary Cell ◽  
Control Architecture ◽  
Micro Electro Mechanical Systems ◽  
Concealed Weapons ◽  
W Band ◽  
Innovative Solutions ◽  
Wave Imaging ◽  
The University

This paper presents recent advances on reconfigurable reflectarrays at the University of Perugia. In particular, the activities carried out in the framework of the FP7 project ARASCOM (“MEMS and Liquid Crystal based” Agile Reflectarray Antennas for Security and COMmunication). As for ARASCOM outcomes, the purpose of the project is the design of a very large reconfigurable reflectarray controlled with micro-electro-mechanical systems (MEMS) for mm-wave imaging system at 76.5 GHz. A system with sufficient resolution to detect concealed weapons impose challenging requirements on the antenna, which shall be made of hundreds of thousands elements. The problem has been addressed by exploiting some innovative solutions and architectures that will be described in this document. In particular, the dimensioning of the reflectarray, the proposed 1-bit geometry of elementary cell, and the innovative biasing control architecture are reported together with the MEMS design and fabrication and the experimental results of a demonstrating board that validated the adopted procedure.

An all electronic passive millimetre wave imaging system

2005 ◽  
Author(s):  
Neil A. Salmon ◽  
John Beale ◽  
Andy Beard ◽  
Mike Dean ◽  
Steve Hayward ◽  
...  
Keyword(s):  
Imaging System ◽  
Millimetre Wave ◽  
Wave Imaging

94 GHz millimetre-wave imaging system implementing optical upconversion

2008 ◽  
Author(s):  
Jesse P. Samluk ◽  
Christopher A. Schuetz ◽  
Richard D. Martin ◽  
E. Lee Stein, Jr. ◽  
Daniel G. Mackrides ◽  
...  
Keyword(s):  
Imaging System ◽  
Millimetre Wave ◽  
Wave Imaging ◽  
Optical Upconversion

Millimetre wave imaging system for the detection of hidden elements in artwork

2014 ◽  
Author(s):  
Carlos V azquez ◽  
Rene Camblor ◽  
Samuel Ver Hoeye ◽  
Andreea Hadarig ◽  
George Hotopan ◽  
...  
Keyword(s):  
Imaging System ◽  
Millimetre Wave ◽  
Wave Imaging

scholarly journals Quality Mapping of Offset Lithographic Printed Antenna Substrates and Electrodes by Millimeter-Wave Imaging

Electronics ◽  
2019 ◽  
Vol 8 (6) ◽  
pp. 674
Author(s):  
Jiao Zhang ◽  
Jianhua Tang ◽  
Wenfeng Sun ◽  
Yan Zhang ◽  
Xinke Wang ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
Time Scale ◽  
High Speed ◽  
Large Scale ◽  
Imaging System ◽  
Inspection Time ◽  
Large Area ◽  
Terahertz Time Domain Spectroscopy ◽  
Antenna Performance ◽  
Wave Imaging

Offset lithographic printed flexible antenna substrate boards and electrodes have attracted much attention recently due to the boost of flexible electronics. Unmanned quality inspection of these printed substrate boards and electrodes demands high-speed, large-scale and nondestructive methods, which is highly desired for manufacturing industries. The work here demonstrates two kinds of millimeter (mm)-wave imaging technologies for the quality (surface uniformity and functionality parameters) inspection of printed silver substrates and electrodes on paper and thin polyethylene film, respectively. One technology is a mm-wave line scanner system and the other is a terahertz-time domain spectroscopy-based charge-coupled device (CCD) imaging system. The former shows the ability of detecting transmitted mm-wave amplitude signals only; its detection is fast in a second time scale and the system shows great potential for the inspection of large-area printed surface uniformity. The latter technology achieves high spatial resolution images of up to hundreds of micrometers at the cost of increased inspection time, in a time scale of tens of seconds. With the exception of absorption rate information, the latter technology offers additional phase information, which can be used to work out 2D permittivity distribution. Moreover, its uniformity is vital for the antenna performance. Additionally, the results demonstrate that compression rolling treatment significantly improves the uniformity of printed silver surfaces and enhances the substrate’s permittivity values.

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