Hardware concepts for the sequential sampling of repetitive pulse radar echoes in cost-efficient ultra-wideband transceivers

2010 ◽  
Vol 52 (3) ◽  
pp. 585-591 ◽  
Author(s):  
Sebastian Hantscher ◽  
Alexander Reisenzahn ◽  
Harald Kainmüller ◽  
Christian G. Diskus
Keyword(s):  
Sequential Sampling ◽  
Ultra Wideband ◽  
Pulse Radar ◽  
Radar Echoes ◽  
Cost Efficient ◽  
Ultra Wideband Transceivers

EXPERIMENTAL STUDY ON RADAR-BASED BREAST CANCER DETECTION USING UWB ANTENNAS WITHOUT BACKGROUND SUBTRACTION

2011 ◽  
Vol 23 (05) ◽  
pp. 383-391 ◽  
Author(s):  
Dan Zhang ◽  
Atsushi Mase
Keyword(s):  
Breast Cancer ◽  
Cancer Detection ◽  
Background Subtraction ◽  
Breast Cancer Detection ◽  
Ultra Wideband ◽  
Breast Cancer Patients ◽  
Uwb Antennas ◽  
Pulse Radar ◽  
Reflection Data ◽  
Cancer Tumor

An ultrashort-pulse radar using ultra-wideband (UWB) antennas such as compact Vivaldi antennas has been applied to the simulation experiment of breast cancer detection. A cooking-oil model and a commercial-made synthetic breast phantom model, which have been developed, as well as with real breast cancer patients during initial clinical trials have been used in our experiment. We detect the breast cancer tumor without using the background subtraction method. Image reconstructions of the breast models using reflection data have been performed by use of confocal microwave imaging (CMI) technique.

Ultra-Wideband Pulse Radar Mounted on an Unmanned Aerial Vehicle for the Monitoring of Moving Objects

2021 ◽  
Vol 55 (4) ◽  
pp. 396-405
Author(s):  
V. Aristov ◽  
E. Lobanovs ◽  
R. Maliks ◽  
M. Celitans ◽  
J. Simanovichs ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Moving Objects ◽  
Ultra Wideband ◽  
Pulse Radar ◽  
Aerial Vehicle

scholarly journals Geopolymer Carbon-Based for Ultra-Wideband Absorbent Applications

Molecules ◽  
2020 ◽  
Vol 25 (18) ◽  
pp. 4218 ◽  
Author(s):  
Ioana Nicoleta Vlasceanu ◽  
Ameni Gharzouni ◽  
Olivier Tantot ◽  
Edson Martinod ◽  
Sylvie Rossignol
Keyword(s):  
Carbon Content ◽  
Nonionic Surfactant ◽  
Environmental Sustainability ◽  
Cost Efficiency ◽  
Ultra Wideband ◽  
Magnetic Characteristics ◽  
Dielectric Characteristics ◽  
Cost Efficient ◽  
Tan Δ ◽  
Reduction Cost

Dimension reduction, cost efficiency, and environmental sustainability are important factors in absorbent designs. Geopolymers represent an eco-friendly and cost-efficient solution for such applications, and the objective of this study is to develop new geopolymer-based composites with tailored dielectric properties. To develop such composites, different formulations based on three types of carbon and various surfactants are tested. The nonionic surfactant is preferred over the anionic surfactant. Dielectric investigations between 2 and 3.3 GHz are performed. The results reveal that the carbon content and its type (origin) have significant effects on the dielectric characteristics and less on the magnetic characteristics. Indeed, an increase in permittivity from 2 to 24 and an increase from 0.09 to 0.6 for loss tangent are shown with changes in the carbon content and type. A permittivity (ε) of 2.27 and loss (tan δ) of 0.19 are obtained for a pore size of 1.6 mm, for the carbon type with the lowest purity, and with a nonionic surfactant. Finally, it is shown that the addition of magnetite has little impact on the overall magnetic properties of the geopolymer.

scholarly journals Feasibility Study and Design of a Wearable System-on-a-Chip Pulse Radar for Contactless Cardiopulmonary Monitoring

2008 ◽  
Vol 2008 ◽  
pp. 1-10 ◽  
Author(s):  
Domenico Zito ◽  
Domenico Pepe ◽  
Bruno Neri ◽  
Fabio Zito ◽  
Danilo De Rossi ◽  
...  
Keyword(s):  
Feasibility Study ◽  
System Analysis ◽  
Ieee 802.15.4 ◽  
Building Blocks ◽  
Ultra Wideband ◽  
Radar Sensor ◽  
Pulse Radar ◽  
Wideband Signals ◽  
Cardiopulmonary Monitoring ◽  
System On A Chip

A new system-on-a-chip radar sensor for next-generation wearable wireless interface applied to the human health care and safeguard is presented. The system overview is provided and the feasibility study of the radar sensor is presented. In detail, the overall system consists of a radar sensor for detecting the heart and breath rates and a low-power IEEE 802.15.4 ZigBee radio interface, which provides a wireless data link with remote data acquisition and control units. In particular, the pulse radar exploits 3.1–10.6 GHz ultra-wideband signals which allow a significant reduction of the transceiver complexity and then of its power consumption. The operating principle of the radar for the cardiopulmonary monitoring is highlighted and the results of the system analysis are reported. Moreover, the results obtained from the building-blocks design, the channel measurement, and the ultra-wideband antenna realization are reported.

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