UWB radar: vision through a wall

Sisma, Ondrej; Gaugue, Alain; Liebe, Christophe; Ogier, Jean-Marc

doi:10.1007/s11235-008-9087-z

Cited by 20 publications

(3 citation statements)

References 9 publications

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“…As a result, FMCW and SFCW radar technologies were proposed to address the drawbacks [26][27][28]. Nevertheless, CW, FMCW, and SFCW radars suffer from limited penetration capability [29].…”

Section: Introductionmentioning

confidence: 99%

IR-UWB Pulse Generation Using FPGA Scheme for through Obstacle Human Detection

Tantiparimongkol

Phasukkit

2020

Sensors

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This research proposes a scheme of field programmable gate array (FPGA) to generate an impulse-radio ultra-wideband (IR-UWB) pulse. The FPGA scheme consists of three parts: digital clock manager, four-delay-paths stratagem, and edge combiner. The IR-UWB radar system is designed to detect human subjects from their respiration underneath the rubble in the aftermath of an earthquake and to locate the human subjects based on range estimation. The proposed IR-UWB radar system is experimented with human subjects lying underneath layers of stacked clay bricks in supine and prone position. The results reveal that the IR-UWB radar system achieves a pulse duration of 540 ps with a bandwidth of 2.073 GHz (fractional bandwidth of 1.797). In addition, the IR-UWB technology can detect human subjects underneath the rubble from respiration and identify the location of human subjects by range estimation. The novelty of this research lies in the use of the FPGA scheme to achieve an IR-UWB pulse with a 2.073 GHz (117 MHz–2.19 GHz) bandwidth, thereby rendering the technology suitable for a wide range of applications, in addition to through-obstacle detection.

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“…As a result, FMCW and SFCW radar technologies were proposed to address the drawbacks [26][27][28]. Nevertheless, CW, FMCW, and SFCW radars suffer from limited penetration capability [29].…”

Section: Introductionmentioning

confidence: 99%

IR-UWB Pulse Generation Using FPGA Scheme for through Obstacle Human Detection

Tantiparimongkol

Phasukkit

2020

Sensors

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“…Recently, UWB technology has been applied for various applications due to its advantages such as low cost, low power consumption, precise localization, and high penetration. Local and personal area networks, military communications, vehicular radar , ground‐penetrating radar , through wall imaging , medical imaging , and precision locations systems are good examples of such applications.…”

Section: Introductionmentioning

confidence: 99%

Wide‐Beam UWB Antenna with A Couch‐Like Reflector for use in an Indoor Home Security Service

Moon

Choi

2013

Micro & Optical Tech Letters

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An impulse radar‐UWB antenna for home security service application is proposed. The antenna consists of a partially elliptical monopole and a couch‐like reflector. The couch‐like reflector creates an antenna beam wide enough to be used for home security service applications. In addition, the antenna can be inconspicuously installed in the upper corner of a room. The dimension of the proposed antenna is 21 × 38 × 20 mm3. The measured H‐plane beam width is wider than 130° over the 10 dB return loss bandwidth of the antenna (6.7–10.33 GHz). The peak gain is greater than 4 dBi in the frequency band of interest. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1721–1724, 2013

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“…Being capable of detecting human beings, it can also be applied to medicine for diagnosis of diseases [3,4] or to security service for through wall surveillance [5,6]. Based on the similar principles, another important application of UWB radar is to detect survivors buried under earthquake rubbles, which microwave pulses transmitted by the radar can penetrate through earthquake rubbles to detect survivors' chest-wall motion mainly caused by respiration [7].…”

Section: Introductionmentioning

confidence: 99%

A new ultra‐wideband radar for detecting survivors buried under earthquake rubbles

Lü

Jing

et al. 2010

Micro & Optical Tech Letters

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converter. The MMW module is composed two parts, which is the transmitter part and receiver part. The transmitter module consists of a waveguide voltage controlled oscillator (VCO) and a magic-T to operate at 94 GHz. The receiver module consists of a monolithic down-converter and a sapphire substrate that was made by using flip chip technology. The fabricated VCO has a waveguide structure for low phase noise and good linearity, which determine the performance of the FMCW radar [9]. The fabricated MMW module is shown in Figure 7.The MMW module was measured using the WR-10 waveguide measurement system. The bandwidth of the Tx output signal is 705 MHz from 93.66 to 94.365 GHz. As shown in Figure 8, the output power changed from 10.76 to 11.56 dBm through the variation of the varactor diode voltage. And then, the conversion loss of the MMW module exhibited excellent performance of 7-8.5 dB. CONCLUSIONSIn this article, we fabricated the MMIC 94 GHz monolithic down-converter to apply the 94 GHz FMCW radar sensor module, by using the 0.1 lm MHEMT technology. The down-converter circuit, which consists of a two stage amplifier and a single balanced diode mixer, showed good characteristics in conversion loss and LO-to-RF isolation because of good phase balance of the tandem coupler with CPW transmission lines of k/4 short stubs, MIM capacitors, and thin film resistors.Also, we fabricated the MMW module for 94 GHz FMCW radar system using the fabricated monolithic down-converter. The fabricated MMW module showed a high output power, low phase noise, good linearity, a low conversion loss, and high LO to RF isolation. These results represent that the MMW module can be applied anti collision systems for cars and military systems. REFERENCES 1. J.D. Park and W.J. Kim, An effective method of eliminating the range ambiguity for a low-cost FMCW radar using VCO tuning characteristics, IEEE Trans Microwave Theory Tech 54 (2006), 3623-3629. 2. A. Tessmann, S. Kudszus, T. Feltgen, M. Riessle, C. Sklarcayk, and W.H. Haydl, Compact single-chip W-band FMCW radar modules for commercial high-resolution sensor applications, IEEE Two-stage broadband high-gain W-band amplifier using 0.1-lm metamorphic HEMT technology, IEEE Electron Device Lett 25 (2004), 766-768. 7. S.W. Moon, M. Han, J.H. Oh, J.K. Rhee, and S.D. Kim, V-band CPW 3-dB tandem coupler using air-bridge structure, IEEE Microwave Wireless Compon Lett 16 (2006), 149-151. 8. A novel 94-GHz MHEMT-based diode mixer using 3-dB tandem coupler, IEEE Microwave Wireless Compon Lett 18 (2008), 626-628. 9.ABSTRACT: Existing ultra-wideband (UWB) radars for buried survivor detection operated at high center frequencies and had limited penetration capability. A new UWB radar operating at a center frequency of 500 MHz is developed in this article. The experimental results show that it can detect the respiration of human subjects lying under a simulated earthquake rubble of about 2 m in thickness. Thus this new radar is practicable and promising for detecting buried survivors after an earthquake.ABS...

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UWB radar: vision through a wall

Cited by 20 publications

References 9 publications

IR-UWB Pulse Generation Using FPGA Scheme for through Obstacle Human Detection

IR-UWB Pulse Generation Using FPGA Scheme for through Obstacle Human Detection

Wide‐Beam UWB Antenna with A Couch‐Like Reflector for use in an Indoor Home Security Service

A new ultra‐wideband radar for detecting survivors buried under earthquake rubbles

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