Gigahertz frequency fringing near-field biomedical sensor
US12036008B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Aug 9, 2021 |
| Grant date | Jul 16, 2024 |
| Priority date | — |
| Expiry date | Sep 28, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/166
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A near-field sensor method and device for obtaining biomedical information is disclosed. A transmission-line aperture arrangement configured to guide electromagnetic waves and emit near-field fringing energy, is placed near the skin. The transmission line is excited at a narrow-band Gigahertz frequency. The near-field fringing energy emitted by the sensor device penetrates at least partially into the skin and underlying blood vessels, and this energy is partially absorbed and partially phase shifted in a time varying manner according to the changes in tissue physiology. The status of the sensor device is monitored over a plurality of time intervals, and changes in both the phase and the amplitude of the signals passing though the transmission line are used to determine biomedical information such as heart rates, PTT, blood pressure, and glucose levels. Various transmission-line configurations, and various reference transmission-line methods to reduce low-frequency noise, are also discussed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.