Low-power near-field microwave applicator for localized heating of soft matter

2004 ◽  
Vol 84 (25) ◽  
pp. 5109-5111 ◽  
Author(s):  
A. Copty ◽  
F. Sakran ◽  
M. Golosovsky ◽  
D. Davidov ◽  
A. Frenkel
Keyword(s):  
Low Power ◽  
Soft Matter ◽  
Near Field ◽  
Localized Heating ◽  
Microwave Applicator

A novel measurement strategy to evaluate the human head as a transition medium for inductive ear-to-ear communication

2019 ◽  
Vol 64 (2) ◽  
pp. 233-241
Author(s):  
Jan-Christoph Edelmann ◽  
Dominik Mair ◽  
Thomas Ussmueller
Keyword(s):  
Low Power ◽  
Hearing Aids ◽  
State Of The Art ◽  
Near Field ◽  
Human Head ◽  
International Telecommunication Union ◽  
International Telecommunication ◽  
Channel Characteristics ◽  
Coupling Factors ◽  
Novel Concept

Abstract This manuscript introduces a novel concept for measuring coil coupling for extremely loose-coupled coils (coupling factors k<10−6; mutual inductance values M<10−10 H). Such a coupling is found everywhere where the ratio of solenoid diameter to coil spacing is >50. Measuring these quantities with a low-power technology requires a sophisticated setup that goes beyond the sensitivity of state-of-the art approaches. The methodology is validated using laboratory measurements with three sets of solenoids (two ferrite-cored, one air-cored) and numerical simulations with COMSOL Multiphysics 5.2a, Stockholm, Sweden. The concept is then employed to investigate the channel characteristics for inductive through-the-head communication within the 3.155–3.195 MHz band. This selected part of the spectrum is in accordance with International Telecommunication Union Radio Regulation 5.116 for low-power wireless hearing aids. By applying a phantom solution, we demonstrate that human tissue layers are transparent for magnetic fields within these frequencies. However, the influence from the relative coil arrangement is evaluated in detail as it restricts the communication range significantly. The coupling results for off-the-shelf Sonion, Roskilde, Denmark, RF 02 AA 10 solenoids considering both lateral and axial displacements might be of special interest for a number of near-field applications.

Open and low power near field communication-based platform in healthcare applications

2014 ◽  
Author(s):  
Gabriele Rescio ◽  
Alessandro Leone ◽  
Giovanni Montagna ◽  
Pietro Siciliano
Keyword(s):  
Low Power ◽  
Near Field ◽  
Near Field Communication ◽  
Healthcare Applications

scholarly journals Near-field investigation of ions emitted from a hollow cathode assembly operating at low-power

1998 ◽  
Author(s):  
George Williams, Jr. ◽  
Matthew Domonkos ◽  
Karyl Shand ◽  
James Haas ◽  
Lyon Ling ◽  
...  
Keyword(s):  
Low Power ◽  
Hollow Cathode ◽  
Near Field ◽  
Field Investigation ◽  
Cathode Assembly

Low-power near-field magnetic wireless energy transfer links: A review of architectures and design approaches

2017 ◽  
Vol 77 ◽  
pp. 486-505 ◽  
Author(s):  
Akaa Agbaeze Eteng ◽  
Sharul Kamal Abdul Rahim ◽  
Chee Yen Leow ◽  
Suhanya Jayaprakasam ◽  
Beng Wah Chew
Keyword(s):  
Energy Transfer ◽  
Low Power ◽  
Near Field ◽  
Wireless Energy Transfer

scholarly journals Very High Bit Rate Near-Field Communication with Low-Interference Coils and Digital Single-Bit Sampling Transceivers for Biomedical Sensor Systems

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6025
Author(s):  
Sebastian Stoecklin ◽  
Elias Rosch ◽  
Adnan Yousaf ◽  
Leonhard Reindl
Keyword(s):  
Low Power ◽  
Data Transfer ◽  
Near Field ◽  
Cmos Technology ◽  
Near Field Communication ◽  
Sensor Systems ◽  
Analog To Digital ◽  
High Data ◽  
Biomedical Sensor ◽  
Field Programmable

The evolution of microelectronics increased the information acquired by today’s biomedical sensor systems to an extent where the capacity of low-power communication interfaces becomes one of the central bottlenecks. Hence, this paper mathematically analyzes and experimentally verifies novel coil and transceiver topologies for near-field communication interfaces, which simultaneously allow for high data transfer rates, low power consumption, and reduced interference to nearby wireless power transfer interfaces. Data coil design is focused on presenting two particular topologies which provide sufficient coupling between a reader and a wireless sensor system, but do not couple to an energy coil situated on the same substrate, severely reducing interference between wireless data and energy transfer interfaces. A novel transceiver design combines the approaches of a minimalistic analog front-end with a fully digital single-bit sampling demodulator, in which rectangular binary signals are processed by simple digital circuits instead of sinusoidal signals being conditioned by complex analog mixers and subsequent multi-bit analog-to-digital converters. The concepts are implemented using an analog interface in discrete circuit technology and a commercial low-power field-programmable gate array, yielding a transceiver which supports data rates of up to 6.78 MBit/s with an energy consumption of just 646 pJ/bit in transmitting mode and of 364 pJ/bit in receiving mode at a bit error rate of 2×10−7, being 10 times more energy efficient than any commercial NFC interface and fully implementable without any custom CMOS technology.

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