The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
5.8 GHz Doppler radar which is wireless sensor to collect the respiration and heart rate using feed-forward type branch-line coupler is developed. Even though the wireless sensing systems using a circulator or branch-line coupler have been developed, these systems have low sensitivity because of low isolation and bulky system due to Tx/Rx two independent signal paths. In this paper, proposed Doppler...