The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 05, 2012
Filed:
Aug. 24, 2009
Feng-jian Chou, Hsinchu Hsien, TW;
Chih-yuan Hsieh, Hsinchu Hsien, TW;
Feng-Jian Chou, Hsinchu Hsien, TW;
Chih-Yuan Hsieh, Hsinchu Hsien, TW;
MStar Semiconductor, Inc., Hsinchu Hsien, TW;
Abstract
A radio frequency (RF) positioning system for positioning an RF device on a surface is provided. The RF positioning system utilizes the property of the RF device generating a response signal upon receiving an RF signal to perform positioning. The RF positioning system includes an antenna set, a switch unit, an RF module and micro-controller unit (MCU). The antenna set has a plurality of antennas in different sizes. The RF module is coupled to the switch unit. The MCU, coupled to the switch unit and the RF module, controls the switch unit to select one antenna from the antenna set and controls the RF module to generate the RF signal. The MCU further estimates a distance between the RF device and the RF positioning system according to whether the RF positioning system receives the response signal through the selected antenna.