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This paper presents the pressure readout results from a piezoresistive pressure sensor in a biological environment mimicking the human head properties for intracranial pressure (ICP) monitoring application. The piezoresistive pressure sensor is powered wirelessly through inductively coupled antennas. After successful activation of the sensor, the pressure readout is demonstrated from 0 mmHg to 30...
We attest the feasibility of a textile antenna in remote powering of a piezoresistive pressure sensor through inductive coupling for monitoring of intracranial pressure. The textile antenna made of metallized fabric on light-weight cell foam rubber substrate. Simulated and measured results of the wireless link performance along with measured output voltage versus pressure are presented.
Due to the massive increase in the number of wireless devices, studying the use of cost-effective and environmental-friendly materials to be used together with effective additive manufacturing methods has been a growing trend in electronics during the recent years. Especially graphene materials have a huge potential to revolutionize the fabrication of wireless electronics. In this paper, passive graphene,...
This paper presents the performance evaluation of a circularly polarized wearable antenna on flexible Ethylene Propylene Diene Monomer (EPDM) foam substrate. EPDM is a rubber based material with high flexibility, good shock resistance and easy attachment to any curved surface. The designed antenna operates for Industrial, Scientific and Medical (ISM) band and Wireless Body Area Network (WBAN) applications...
In this work, input characteristics of Quadrifilar Helix Antenna (QHA) are investigated for variations in height in the presence of finite metallic structures of varying sizes. It is noticed that the input characteristics such as conductance, susceptance and reflection coefficient are affected as height of QHA above these finite metallic ground planes varies. Rapid variations are observed if QHA is...
In this paper we study the effect of magnetic core in both the implant and the external reader antenna and higher operational frequency of the implant for wireless passive Intracranial Pressure Monitoring (ICP). Implant and external reader antenna are inductively coupled. ICP can be monitored through the change of implant resonance frequency or external reader antenna input impedance phase dip. We...
We analyze a two-turns antenna to provide power wirelessly to 2×2×2 mm3 cubic cortical implant. We present simulation of available power and voltage to the implant and assess the impact of a inserting a magnetic core in the antennas for further performance enhancement. We have fabricated the studied antennas and verified the simulated link power efficiency through measurement in a liquid phantom.
A rectangular microstrip patch antenna with probe feed is proposed in this paper. The patch of an antenna has a key circular slot which is auxiliary truncated in circular style resulting three narrow bands of the most worthy and in-use wireless technologies of the modern age, that are GSM, Wi-Fi and WiMAX. The resonating bandwidths of the presented antenna ranges from 1.79 to 1.83 GHz for GSM 1800,...
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