Title :
A circularly polarised antenna for a wireless blood-flow sensor
Author :
El Atrash, Mohamed ; Yi Wang
Author_Institution :
Sch. of Electr. Commun. & Electron. Syst. Eng., October Univ. for Modern Sci. & Arts Univ., Cairo, Egypt
Abstract :
This paper presents a circularly polarised antenna for determining the speed of blood-flow, using Doppler effects at microwave frequencies. The structure consists of a double-feed patch antenna and a quadrature hybrid coupler in order to achieve circular polarisation and to isolate the reflected signal from the incident. The design was simulated and then fabricated. Both results were compared which showed a good agreement in terms of scattering parameters and radiation patterns.
Keywords :
Doppler effect; antenna radiation patterns; biomedical telemetry; blood flow measurement; electromagnetic wave polarisation; microstrip antennas; microwave antennas; microwave detectors; telemedicine; velocity measurement; Doppler effects; antenna circular polarisation; antenna design simulation; antenna fabrication; blood flow speed determination; double-feed patch antenna structure; incident signal isolation; microwave frequency; quadrature hybrid coupler; radiation pattern; reflected signal isolation; scattering parameter; wireless blood-flow sensor; Antenna measurements; Antenna radiation patterns; Blood flow; Couplers; Doppler effect; Microwave antennas; Blood-flow; circular polarisation; human tissue; microstrip patch antenna; quadrature hybrid coupler;
Conference_Titel :
RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-Bio), 2014 IEEE MTT-S International Microwave Workshop Series on
Conference_Location :
London
Print_ISBN :
978-1-4799-5445-2
DOI :
10.1109/IMWS-BIO.2014.7032388
