Varpula
Timo Varpula, Vantaa FI
Patent application number | Description | Published |
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20090058603 | Rfid Reading Apparatus and Method - This publication discloses an RFDD reading apparatus ( | 03-05-2009 |
20090160612 | Measurement System, Measurement Method and New Use of Antenna - The invention relates to a measuring system for detecting radio-frequency tags, a measuring method, and a new use for a leaky waveguide. The measuring system comprises a reading device and an antenna, which is connected to reading device for connecting to the tags. According to the invention, the antenna is a microstrip-type leaky waveguide having a length which is several times the operating wavelength of the tags. The invention permits reliable and precise RFID detection, for example, for a results service for sports events. | 06-25-2009 |
Timo Varpula, Vtt FI
Patent application number | Description | Published |
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20120046571 | METHOD AND APPARATUS FOR DETECTING ETHANOL - The present publication discloses a method for detecting ethanol, in which method the ethanol content of a person is measured. According to the invention, the ethanol content is measured from the person's skin, using a capacitive measurement method. | 02-23-2012 |
Timo Varpula, Espoo FI
Patent application number | Description | Published |
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20120235847 | Non-linear resonating sensor and a method - Described herein is a passive wireless resonating non-linear sensor that is typically based on a ferroelectric varactor. The sensor replies its data at an intermodulation frequency when a reader device illuminates it at two closely-located frequencies. Furthermore, described herein is a general intermodulation read-out principle for passive wireless sensors. A sensor utilizes a mixing element, such as a varactor and it can be equipped with a capacitive, inductive, or resistive sensor element. When the sensor is illuminated with signals with two frequencies it replies the sensor data at an intermodulation frequency. | 09-20-2012 |
20120306683 | Method and System for Object Localization - This document describes a method and system for object localization. In accordance with the method an object ( | 12-06-2012 |