Measurement of Radio Frequency Permittivity of Biological Tissues with an Open-Ended Coaxial Line: Part II - Experimental Results

Radio Frequency (RF) devices produce some amount of Unintended Electromagnetic Emissions (UEEs). UEEs are generally unique to a device and can be used as a signature for the purpose of detection and identification. The problem with UEEs is that they are very low in power and are often buried deep inside the noise band. The research herein provides the application of Support Vector Machine (SVM) for detection and identification of RF devices using their UEEs. Experimental Results shows that SVM can detect RF devices within the noise band, and can also identify RF devices using their UEEs.

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Providing Connectivity to Implanted Electronics Devices: Experimental Results on Optical Communications Over Biological Tissues with Comparisons Against UWB

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering - Body Area Networks. Smart IoT and Big Data for Intelligent Health ◽

10.1007/978-3-030-64991-3_1 ◽

2020 ◽

pp. 3-17

Author(s):

Senjuti Halder ◽

Mariella Särestöniemi ◽

Iqrar Ahmed ◽

Marcos Katz

Keyword(s):

Optical Communications ◽

Biological Tissues ◽

Experimental Results

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Use of Saline Injection to Create Large Thermal Lesions During Radio Frequency Ablation Therapy: 2. Experimental Results

10.1115/imece2001/htd-24427 ◽

2001 ◽

Author(s):

Lissa P. Silver ◽

Patrick S. Hamilton ◽

Angela C. Ni ◽

Roberto M. Aimi ◽

Michael G. Curley

Keyword(s):

Heat Transfer ◽

Radio Frequency ◽

Liver Tumors ◽

Treatment Options ◽

Left Ventricular ◽

Electrode Site ◽

Experimental Results ◽

Interface Temperature ◽

Invasive Treatment ◽

Ablation Therapy

Abstract Tissue charring during radio frequency (RF) therapy causes an impedance rise and prevents further tissue heating from occurring, thereby limiting the size of lesions that can be created. The ability to create very large lesions would provide minimally invasive treatment options for deep tissue left ventricular arrythmias and otherwise-untreatable large liver tumors. Adding convection as a method of heat transfer by injecting saline at the RF electrode site acts to both clamp the electrode/tissue interface temperature and carry energy deeper into the tissue. We have developed a RF system that uses both conduction and convection simultaneously to both enhance the amount of heat transfer and prevent or greatly delay the onset of charring. Here we confirm the heat transfer augmentation of convection with experimental results in skeletal muscle, liver, and myocardium.

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Coherent Passive Backscatter Communications Using Ambient Transmitters

International Journal of Handheld Computing Research ◽

10.4018/ijhcr.2014040102 ◽

2014 ◽

Vol 5 (2) ◽

pp. 23-43

Author(s):

William C. Barott ◽

Kevin M. Scott

Keyword(s):

Radio Frequency ◽

Low Complexity ◽

Data Rate ◽

Experimental Results ◽

Digital Television ◽

Passive Radar ◽

Detection Range ◽

Backscatter Modulation ◽

Radio Frequency Signals ◽

Processing Algorithms

A communications method is presented based on the backscatter modulation of incident radio frequency signals using low-complexity tags. The incident signals arise from digital television stations used as illuminators of opportunity. A receiver detects the tag using coherent processing algorithms similar to those used in passive radar, extending the detection range over published noncoherent techniques. This method enables shared use of the UHF television band for low-data-rate applications. While analyses suggest that rates exceeding 1 kbps might be achievable at 1 km range, experimental results demonstrate the challenges in designing and implementing such a system.

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Improving the Reliability of RFID Interrogator by an Inclined Contact Surface Design in Vehicle Infrastructure Cooperation Systems

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.525.297 ◽

2014 ◽

Vol 525 ◽

pp. 297-300

Author(s):

Xu Xu ◽

Yi Zhang

Keyword(s):

Radio Frequency ◽

Contact Surface ◽

Radio Frequency Identification ◽

Energy Coupling ◽

Experimental Results ◽

Curved Surface ◽

Surface Design ◽

Frequency Identification

An inclined contact surface design for Radio Frequency Identification (RFID) interrogator with easy-pick gaps has been developed. Compared with the curved surface and pallet surface, the performance of inclined contact surface has been investigated in the calculated electromagnetic configurations and experimental results. It is found that the inclined contact surface has the improved reliability of data writing of RFID. By experimentally and theoretically analyzing, the improved reliability is considered to be the combined results of the energy coupling configurations and the depressed material contacts effect.

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