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P12311 MSD PROJECTRF ANECHOIC
CHAMBER
Automated Antenna Radiation and Gain
Measurement System with User Interface
Sheldon PalmerDanielle Walters
2/22/2012
Measurement System
Frequency Generator: Agilent MXG Analog Signal Generator 100kHz-6GHz (N5181A)
Spectrum Analyzer: Hewlett Packard Spectrum Analyzer 9kHz-50GHz (8565E)
Receive Antenna
Transmit Antenna
Spectrum Analyzer
Control Box
Frequency Generator
Cable Pass Through
Motor Arm
Allows antenna to be shifted up and down to ensure correct height and side to side to ensure it is centered
Allows antenna to be shifted forward and back to ensure correct distance
Motor ArmArm with mount
Acrylic sheets sandwiching turntable
Turntable
Turntable
Acrylic Sheet
Acrylic Sheet
Motor
Motor Power Cord
Position Marker
Reflector Antenna
Characterization
2.25 2.3 2.35 2.4 2.45 2.5-22
-20
-18
-16
-14
-12
-10
-8
-6
X: 2.4Y: -17.48
Reflector S11
Frequency [GHz]
S11
X: 2.341Y: -10.02
X: 2.374Y: -14.91
X: 2.484Y: -20.28
2.25 2.3 2.35 2.4 2.45 2.5
1.4
1.6
1.8
2
2.2
2.4
2.6
X: 2.4Y: 1.315
Frequency [GHz]
SW
R
Reflector SWR
X: 2.499Y: 1.396
X: 2.362Y: 1.596
Microstrip Antenna
Characterization
2.25 2.3 2.35 2.4 2.45 2.5-14
-12
-10
-8
-6
-4
-2
X: 2.4Y: -13.52
Frequency [GHz]
S11
[dB
]
Microstrip S11
X: 2.381Y: -10.07
X: 2.436Y: -10.05
2.25 2.3 2.35 2.4 2.45 2.51.5
2
2.5
3
3.5
4
4.5
5
5.5
Frequency [GHz]
SW
R
Microstrip SWR
X: 2.4Y: 1.546
X: 2.396Y: 1.601
X: 2.419Y: 1.597
Control System
Power Adapter DAC USB
Parallel Port Connection
Power SwitchMotor Cord
Friis Transmission Equation
PTest= Power of Test Antenna PStandard= Power of Standard Gain Antenna GTest= Received Gain of Test Antenna GStandard= Received Gain of Standard Gain Antenna
LabVIEW Gain Calibration Program
LabVIEW Measurement Program
Free Space Microstrip Measurement Results
Raw Data Normalized Data
HPBW= 113° - 58° = 55°
Microstrip Chamber Measurement Results
Raw Data Normalized Data
HPBW= 119° - 58° = 61°
Reflector Chamber Measurement Results
Raw Data
Normalized Data
HPBW= 98° - 82° = 16°
Antenna Platform Initialization (Forward)
Antenna Platform Initialization (Reverse)
Future Work
Continue Testing System Ensure LabVIEW Positioning is exact Continue Improvement to GUI