By Mir Hojjat Seyedi, Daniel Lai
This monograph explores Intrabody communique (IBC) as a singular non-RF instant info conversation procedure utilizing the human physique itself because the conversation channel or transmission medium. specifically, the publication investigates Intrabody conversation contemplating limb joint results in the transmission frequency variety 0.3-200 MHz.
Based on in-vivo experiments which ascertain the consequences of dimension, occasions, and destinations of joints at the IBC, the publication proposes a brand new IBC circuit version explaining elbow joint results. This version not just takes the limb joint results of the physique into consideration but additionally considers the effect of dimension apparatus in greater frequency band hence predicting sign attenuation habit over wider frequency levels. ultimately, this paintings proposes transmitter and receiver architectures for intrabody communique. A carrier-free scheme in accordance with impulse radio for the IBC is applied on a FPGA.
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Extra info for A Novel Intrabody Communication Transceiver for Biomedical Applications
7 kg for typical handheld VNAs, such as Agilent N9923A FieldFox, USA) makes it suitable for the outdoor measurements as well as for empirical measurements on non-static human body. Port 1 of MiniVNA Pro (DUT) generates the induced sinusoid signal and feeds into the human body which is the device under test (DUT) in our research. Detector port (DET) of MiniVNA Pro, Port 2, will be considered as receiver. The method of measuring the transmitted signal through the body by means 32 3 Experimental Methodology Fig.
The results indicated that the two terminal electrode structures had a gain of 20 dB greater than the four terminal electrode structures. Four terminals circuit model with six body tissue impedances and four electrode-skin coupling impedances (Z E S ) were proposed by Wegmueller et al.  (see Fig. 8). The contact conditions between the electrodes and human body represented by the impedance (Z E S ) influence signal coupling and attenuation as well as the transceiver power consumption . The value of Z E S is represented by a series of three impedances consisting of electrode impedance, interface impedance (gel impedance), and skin layer impedances which include epidermis and subdermal impedances.
Also, the components of IBC measurement setup (electrodes, baluns, and cables) were further elaborated so as to have a detailed understanding of the process of IBC technique. The rationale behind equipment preferences was discussed. For instance, the utilization of the balun, a distinguished characteristic of our measurement setup, aimed to prevent the parasitic return path from being shorted to the common voltage of the miniVNA battery in capacitive coupling IBC. Finally, the advantages and limitations of each element were discussed in this chapter.
A Novel Intrabody Communication Transceiver for Biomedical Applications by Mir Hojjat Seyedi, Daniel Lai