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NASA Space Communications. Biosensor Networks. Principal Investigators: Frank Merat, Wen H. Ko, Darrin Young Case Western Reserve University. The goal of this project is to develop a test platform for biomedical monitoring using COTS components and state-of-the-art communications concepts.

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Biosensor networks

NASA SpaceCommunications

Biosensor Networks

Principal Investigators: Frank Merat, Wen H. Ko, Darrin Young

Case Western Reserve University


Biosensor networks1

The goal of this project is to develop a test platform for biomedical monitoring using COTS components and state-of-the-art communications concepts.

Biosensor Networks

  • Project Overview

Biomonitoring Network

Body drawing from Fundamentals of Bioelectrical Impedance Analysis, Rudolph J. Liedtke, RJL Systems, February 1998.


Biosensor networks2

This technology has applications for continuous health monitoring of humans in space and for long duration space experiments involving humans and/or animals.

Any wireless solution should interface with existing and future proximity networks.

Biosensor Networks

  • Relevance

“A Lightweight Ambulatory Physiological Monitoring System,” NASA Tech Briefs, January 2001.


Biosensor networks3

The major impact of this technology is upon manned missions, e.g., space station and shuttle missions .

Removal of wires and other encumbrances would improve astronaut freedom of movement and increase the system reliability.

Biosensor Networks

  • Impact

Wireless Biosensor Network


Biosensor networks4
Biosensor Networks e.g., space station and shuttle missions .

RF Phantom

Feasibility Experiment

Body drawing from Fundamentals of Bioelectrical Impedance Analysis, Rudolph J. Liedtke, RJL Systems, February 1998.


Biosensor networks5
Biosensor Networks e.g., space station and shuttle missions .

  • Characterize human body as rf communications channel

Received Power Through the Body (underside of forearm with 30 cm separation). Antenna dimensions: L =39 mm, W = 42 mm, and h = 0.062” on FR-4 substrate.

Geometry of Basic Rectangular Patch Antenna

Received Power at 1 m separation. Antenna dimensions are L = 41 mm, W = 38 mm, and h = 0.062” on FR-4 substrate.

Received Power at 50 cm separation.

Transmitter antenna: L = 54 mm, W = 48 mm, h = 0.062”; receiver antenna L = 26 mm, W = 38 mm, h = 0.062”, both on FR-4 substrate.


Biosensor networks6
Biosensor Networks e.g., space station and shuttle missions .

  • Prototype sensor node

Bare PC board for prototype

Typical rectangular center fed patch antenna used for testing.

“early” power for prototype

Antenna board for prototype

Prototype sensor node with integrated antenna and D-socket for programming


Biosensor networks7
Biosensor Networks e.g., space station and shuttle missions .

  • Propagation modeling

Transmission Line Model of Antenna/Human Circuit using experimentally measured antenna parameters and published values for the electrical parameters of the human body

Simulation of Transmission Line Model for 0.6 Meters Antenna Separation


Biosensor networks8

[1] M. Dummeruth. e.g., space station and shuttle missions .Wireless Wearable Health Monitoring System. M.S. Thesis, Case Western Reserve University, August 2002. (Advisor: F. Merat).

Biosensor Networks

  • Papers and Awards


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