El Atrash M.Wang Y.School of Electrical Communication and Electronics Systems EngineeringOctober University for Modern Science and Arts UniversityWahat Road6 October CityCairoEgypt; University of GreenwichKentME4 4TBUnited Kingdom2020-01-092020-01-0920159.78E+12https://doi.org/10.1109/IMWS-BIO.2014.7032388PubMed ID :https://ieeexplore.ieee.org/document/7032388ScopusThis 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. 2014 IEEE.EnglishOctober University for Modern Sciences and ArtsUniversity for Modern Sciences and ArtsMSA Universityجامعة أكتوبر للعلوم الحديثة والآدابBlood-flowcircular polarisationhuman tissuemicrostrip patch antennaquadrature hybrid couplerBloodCircular polarizationElectric connectorsHemodynamicsMicrostrip antennasMicrowave antennasPolarizationScattering parametersSlot antennasWireless telecommunication systemsBlood flowCircularly polarised antennaHuman tissuesMicro-strip patch antennasQuadrature hybrid couplersReflected signalDirectional patterns (antenna)Conference Paperhttps://doi.org/10.1109/IMWS-BIO.2014.7032388PubMed ID :