Title :
A conformal U-shaped loop antenna for biomedical applications
Author :
Alrawashdeh, Rula ; Yi Huang ; Ping Cao
Author_Institution :
Dept. of Electr. Eng. & Electron., Univ. of Liverpool, Liverpool, UK
Abstract :
In this paper a flexible, conformal, U-shaped loop antenna is proposed for biomedical telemetry in the MedRadio band (401-406 MHz). Due to its flexibility, this antenna can be attached to the outer wall of a small cylindrical implant of 5 mm in radius and 15 mm in length. When simulated inside homogeneous and multilayer body models, this antenna shows a wide-bandwidth of 207 MHz for VSWR <; 2 (from 348 to 555 MHz) covering the entire MedRadio and the industrial scientific medical (ISM) 433-434 MHz Bands. The simulated maximum gain of this antenna in each model can satisfy a link budget of logical parameters for data transmission from inside the human body to an external receiver at a distance of 2 m. This seems to be the only reported flexible antenna that can be used with implants for such a distance in the MedRadio band. In addition to the attractive features of having a small size and broad bandwidth, this design also offers the possibility to work at other frequencies.
Keywords :
UHF antennas; biomedical telemetry; conformal antennas; frequency shift keying; loop antennas; prosthetics; radio networks; radio receivers; shaped beam antennas; EIRP; FSK; MedRadio band; antenna maximum gain; bandwidth 207 MHz; bandwidth 348 MHz to 555 MHz; bandwidth 401 MHz to 406 MHz; bandwidth 433 MHz to 434 MHz; biomedical applications; biomedical telemetry; conformal U-shaped loop antenna; cylindrical implant; data transmission; distance 15 mm; distance 2 m; equivalent isotropic radiated power; flexible U-shaped loop antenna; frequency shift keying; homogeneous body models; implantable devices; industrial scientific medical; logical parameters; medical device radiocommunication; multilayer body models; radius 5 mm; specific absorption rate; Antenna radiation patterns; Bandwidth; Implants; Nonhomogeneous media; Receiving antennas; Equivalent isotropic radiated power (EIRP); Frequency shift keying (FSK); Industrial sceientific medical (ISM); Specific absorption rate (SAR); biomedical telemetry; conformal antenna;
Conference_Titel :
Antennas and Propagation (EuCAP), 2013 7th European Conference on
Conference_Location :
Gothenburg
Print_ISBN :
978-1-4673-2187-7
Electronic_ISBN :
978-88-907018-1-8
