design of a polarization reconfigurable crossed-dipole antenna using surface integrated fluidic...
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Design of a Polarization Reconfigurable Crossed-Dipole Antenna
Using Surface Integrated Fluidic Loading Mechanisms
1S. Goldberger, 2F. Drummond, 1J. Barrera, 2S. Davis, 1J. Edelen, 1 M. Geppert, 1Y. Judie, 1Q. Manley, 2C. Peters, 3S. Smith, and 1G. H. Huff
1Electromagnetics and Microwave Laboratory, Department of Electrical and Computer Engineering
Texas A&M University, College Station, TX 77843-31282Department of Aerospace Engineering
Texas A&M University, College Station, TX 77843-31183Department of Mechanical Engineering
Texas A&M University, College Station, TX 77843-3123
Email: [email protected]
This work was sponsored in part by AFOSR grant # FA9550-08-1-0329 and the NASA funded Space Engineering Institute at Texas A&M University
Project Team and Acknowledgements
Second Row: Sean Goldberger, Stephen Davis, Frank Drummond, Joel Barrera, and Michelle Geppert
Front Row: Quinn Manley, YaShavaun Judie, Jamie Edelen, Samantha Smith, and Cameron Peters
Prof. Gregory H. Huff
Prof. James G. Boyd
Dr. Patrick Fink
Dr. Tim Kennedy
Dr. Phong Ngo
Magda Lagoudas
Stephen A. Long
Motivation
Support NASA JSC on software defined radios with adaptive and reconfigurable antenna systems
www.radantmems.com
SOA antenna reconfiguration uses RF MEMS and solid state
Complexity can result from biasing and control
New materials-centric approach provides continuous tunability
Biasing and control lines removed from plane of antenna
www.nature.com
www.tplinc.com
Materials Team Goals
Concerned with analyzing the fluid flowing through the antenna
Three major goals– Determine effective properties for a random
particle distribution– Model moving particles– Design fluidic system
Dielectric Constant Testing
Effective Properties Simulation
Use MATLAB to generate random 3-D particles
Use COMSOL for effective property simulations
Random, periodic particle distribution
Oil
BSTO Surfactant
Fluidic Simulation
•More realistic results than static FCC lattice structure from last year•Will be combined with random particle distribution code
•Particle collisions •Bunching •Path through curve
Antenna Design
Microstrip Cross-Dipole: Experimental Model (ISM Band Design)Switchable dual linearly polarized crossed dipole design with four electrokinetic coupled microstrip gaps filled with volume fractions of magnetodielectric colloidal material in liquid
Analytical Modeling
Gap Analytical Modeling
Inflow/Outflow
Channel
GapAdapter
Capillary Integration
LabVIEW Integration Team Goals and Progress
Goals• Control speed of peristaltic
pump with LabVIEW• Control network analyzer and
its components with LabVIEW• Implement a closed-loop
system
PNA NI Module Peristaltic Pump
Progress•Downloaded drivers for NI module to LabVIEW connection
•Pump runs without LabVIEW or module at a maximum velocity of 0.45 ml/min with water
•Currently working on a program for the PNA
http://www.cpsc.gov/cpscpub/prerel/prhtml07/07267c.jpg
USB
Analog
USB
Peristaltic Pump
• Peristaltic pump - Positive displacement pump used for pumping a variety of fluids
• Description - As the rotor turns, rollers attached to the external circumference compress the flexible tube forcing the fluid to move through the tube
www.eccentricpumps.comhttp://upload.wikimedia.org/wikipedia/commons/2/2a/Howworksmin.gif
Rotary peristaltic pump action 360 Degree peristaltic pump
Flow Rate Variables
•Tube ID - higher flow rate with larger ID•Length of inner tube- higher flow rate with longer length •Roller RPM - higher flow rate with higher RPM
Clockwise roller
rotation
Measured Data
No Radiation
Measured Data
Sim: Black Meas: Red
Data
Sim: Black Meas: Red
Data
Sim: Black Meas: Red
Future Work – Software Defined Radio
Software Reconfigurable Antennas•Analyzes the signal that the antenna is sending or receiving•Modifies the antenna based on the bit error rate•Operating Frequency: 2.4GHz
Ways to Reconfigure the Antenna•Change the Polarization•Change concentration of particles or liquids •Change the power of the antenna
Gnuradio
•The USRP •Connects the antenna to the computer•Gives the antenna the signal to send and receives the signal sent•Performs analysis on signal•Can be programmed
•Another Controller •Controls circuits that control the configuration of the antenna•Gets a response from computer about the transmitted signal•Sends an electrical signal to a circuit connected to the antenna to reconfigure it
Software controls the USRP and other controllers
Design of a Polarization Reconfigurable Crossed-Dipole Antenna
Using Surface Integrated Fluidic Loading Mechanisms
1S. Goldberger, 2F. Drummond, 1J. Barrera, 2S. Davis, 1J. Edelen, 1 M. Geppert, 1Y. Judie, 1Q. Manley, 2C. Peters, 3S. Smith, and 1G. H. Huff
1Electromagnetics and Microwave Laboratory, Department of Electrical and Computer Engineering
Texas A&M University, College Station, TX 77843-31282Department of Aerospace Engineering
Texas A&M University, College Station, TX 77843-31183Department of Mechanical Engineering
Texas A&M University, College Station, TX 77843-3123
Email: [email protected]
This work was sponsored in part by AFOSR grant # FA9550-08-1-0329 and the NASA funded Space Engineering Institute at Texas A&M University