Additionally, the effects of the human skin's thickness on the antennas are studied in order to consider medical devices which are implanted in various subcutaneous tissues. Furthermore, the real time data acquisition using developed transceiver and its experimental verification is illustrated. Simulated maximum gains attain -23dBi and -19. The proposed antenna can be used for biomedical applications, security purposes Explosives detection , drug detection and monitoring water content in leaves. In this work, an implantable antenna is proposed for short-range biomedical applications. The antenna has been fed by microstrip feedline which has an input impedance of 292. The results of this paper provide guidance in the design of implantable microstrip antennas.
To incorporate these properties, a thick-arm spiral structure is applied to the designed antenna. The simulated and measured bandwidths are 7. The benefits of high-speed communication and much greater communication distances in biomedical applications have spawned numerous wireless standards committees, and the U. This perspective article provides an overview of the implantable medical device ecosystem, highlights recent developments, and discusses challenges and opportunities for translation of new innovative implants enabled by microtechnologies and microfabrication. This paves the way for realizing patch frequency using a practical excitation method. Most importantly, the antenna must be designed with an in-depth consideration given to its surrounding environment. To make practical and efficient use of antennas inside the human body, which is composed of a high dielectric and lossy material, the resonance characteristics and radiation patterns were evaluated through a measurement setup using a liquid human phantom.
This also allows for a formulation in a versatile optimization framework. The antenna has achieved a high gain of 7. Microwave Opt Technol Lett 51: 749—752, 2009; Published online in Wiley InterScience www. Optical nanodipoles made of plasmonic elongated nanoparticles have been theoretically and experimentally characterized by various groups in recent studies1, 2, 3, 4, 5, 6, 7, 8, 9, 10. Dipole and bowtie antennas confine the field in a volume well below the diffraction limit, defined by the gap dimensions. However, there have not been enough details about the wireless mechanism within the system even though it is accountable for the information transmission from the camera to the electrodes and also the complexity of the process itself due to the challenging environments. The bidirectional radiation pattern is achieved for various frequency conditions.
Finally, simulated results have been validated by measuring return losses of the antenna embedded in mimicking gels, radiation patterns in anechoic chamber and radiation efficiency in reverberation chamber. The antenna has a simple structure with low profile and is placed on human tissues like Muscle, Fat and Skin. The antenna occupies a volume of only 791 mm3 22. We implement various domains in matlab projects. To make practical use of antennas inside a human body, resonance characteristics of the implanted antennas and their radiation signature outside the body must be evaluated through numerical analysis and measurement setup. Whereas the dipole antenna is monomode in the considered spectral range, the bowtie antenna exhibits multiple resonances. A model of a novel miniature antenna is initially proposed for skin implantation, which includes varying parameters to deal with fabrication-specific details.
The propounded antenna design can be successfully employed for biomedical applications and security purposes. The antenna is loaded with rectangular slots, placed symmetrically on either side of the feed post, and it uses shorting pins to generate an over-the-body-surface propagating mode. The optical properties of plasmonic dipole and bowtie nanoantennas are investigated in detail using the Green's tensor technique. For the ease of the design of implanted low-profile antennas, simplified planar geometries based on a real human body are proposed. Did you know that your Internet Explorer is out of date? The device can digitalize and transmit up to three analog signals coming from different sensors.
This letter presents a comprehensive and systematic antenna performance evaluation and wireless medical telemetry characterization between two different ingestible antenna designs, an inverted conical helical antenna and a reference conformal meandered offset dipole antenna. Along this document, an innovative dual band microstrip patch antenna is proposed for implantable medical devices. The small overall size less than 1 cm3 , the power density compatible with current regulations for the design of implantable devices, and the dedicated packaging make the system suitable for in vivo monitoring in humans. This paper describes a microcontroller-based multichannel telemetry system, suitable for in vivo monitoring of physiological parameters. Many challenges face the design of implantable biomedical devices including designing and implanting antennas within hostile environment due to the surrounding tissues of human body.
Antennas implanted in a human body are largely applicable to hyperthermia and biotelemetry. Analytical results using simulation models and experimental results using skin phantoms are presented and discussed. Despite being electrically small and in close proximity to a muscle tissue phantom, the simulated radiation efficiency of the antenna was 54 %. The antennas are installed on an implantable medical device in a biological-tissue simulating model. This paper describes a few antennas for hyperthermia which is one of thermal therapies for cancer. To assist in vitro testing, a low-cost technique is proposed for reliably measuring the electric properties of liquids without requiring commercial equipment.
In this paper, a microstrip rectangular patch antenna with reduced ground capable of operating in terahertz optical frequency range has been designed and proposed. In addition to the clear benefits to the healthcare system provided by body implanted devices, economical aspects are also relevant. Even simple constraints such as fixing the feed and ground locations and encouraging the antenna to grow preferentially in the horizontal direction to take advantage of the longer physical dimensions of a pacemaker in that direction can appreciably improve convergence speed. Particularly, in order to realize minimally invasive treatment, small-size antennas are desired. In addition to the clear benefits to the healthcare system provided by body implanted devices, economical aspects are also relevant.