rcs comparisons - university of arizonaece381/secure/class... · hfss model of the prepreg antenna...
TRANSCRIPT
RCS Comparisons
Goals of Antenna Design
High overall efficiency Large bandwidth High directivity Cheap, light weight, easy to fabricate
Efficiencies
Source
Transmission Lines
Antenna
E, H
( )21
radiated overall input
radiation accepted
radiation input
P e Pe P
e P
=
=
= − Γ
Gain = Efficiency × Directivity
Low gain
High gain
D = 1.5
Small dipole
D ~ 100
Reflector Antenna
Phased Array
Electronically Steer the Bean
Reflector Antenna
Reflector Antenna
“Dipole” Antenna
Dipole Antenna
Aegis Phased Array Radar ~10,000 radiating elements
ESA Phased Array for Broadcast Reception in Cars
Auto radars
Collision Avoidance Radars
Add-on Car Antennas
Why think about wireless systems in/on/near cars??
Cell phone antennas – more and more and more
Cell phone antennas - how you hold them matters
Wireless Health Monitoring
RFID Tags
IEEE Spectrum March 2007
Prediction: all products will have
some form of Embedded RFID Tag in the next few years
Human GI tract and a typical 430 MHz radio pill with lights, video camera and transmitting coil
Diameter = 1 cm, length = 3 cm
IEEE MTT Magazine, March 2002
Metamaterial-based Electrically small antennas
Free Space
A. Erentok and R. W. Ziolkowski, ECE, UA
EZ Magnetic EZ Electric
2D
3D
ka < 0.5 OE > 90%
A. Erentok and R. W. Ziolkowski, ECE, UA
Metamaterial-inspired Electrically small antennas
Inductor
2D Mag EZ Tested at 430 MHz
2D Elec EZ Tested at 1.37 GHz,
1.575 GHz
3D Mag EZ Tested at
1575 MHz 300 MHz 100 MHz
3D Elec Z Tested at 570 MHz 300 MHz
Z antenna Measured at NIST-Boulder
CLL1 CLL2
CLL3
UWB antenna Tri-band
Exclusion designs
Dual Band GPS L1-L2
High Gain
Metamaterial Antenna
For 60 GHz LAN
Actual 1.25 Gigabit/s Ethernet data was transmitted wirelessly between two computers using this high
gain antenna structure
Wireless Power Harvesting Near-field Induction
Coils – Power Transfer for
Battery Charging
Intelligent Highway
Far-field
SPS – Solar Power Satellite
Security and Surveillance
HFSS model of the Prepreg Antenna
Driven meander dipole
EAD NFRP element
Success in the Land of OZ
Laminated and cured final antenna
Antenna works !!
Pregtronics
Amplifier circuit works !!
Microchip works too !!
I think our antenna would look awesome integrated into this platform