Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle...

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P12311 MSD PROJECT RF ANECHOIC CHAMBER Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012

Transcript of Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle...

Page 1: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012.

P12311 MSD PROJECTRF ANECHOIC

CHAMBER

Automated Antenna Radiation and Gain

Measurement System with User Interface

Sheldon PalmerDanielle Walters

2/22/2012

Page 2: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle 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

Page 3: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012.

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

Page 4: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012.

Motor ArmArm with mount

Acrylic sheets sandwiching turntable

Turntable

Turntable

Acrylic Sheet

Acrylic Sheet

Motor

Motor Power Cord

Position Marker

Page 5: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012.

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

Page 6: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012.

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

Page 7: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012.

Control System

Power Adapter DAC USB

Parallel Port Connection

Power SwitchMotor Cord

Page 8: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012.

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

Page 9: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012.

LabVIEW Gain Calibration Program

Page 10: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012.

LabVIEW Measurement Program

Page 11: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012.

Free Space Microstrip Measurement Results

Raw Data Normalized Data

HPBW= 113° - 58° = 55°

Page 12: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012.

Microstrip Chamber Measurement Results

Raw Data Normalized Data

HPBW= 119° - 58° = 61°

Page 13: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012.

Reflector Chamber Measurement Results

Raw Data

Normalized Data

HPBW= 98° - 82° = 16°

Page 14: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012.

Antenna Platform Initialization (Forward)

Page 15: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012.

Antenna Platform Initialization (Reverse)

Page 16: Automated Antenna Radiation and Gain Measurement System with User Interface Sheldon Palmer Danielle Walters 2/22/2012.

Future Work

Continue Testing System Ensure LabVIEW Positioning is exact Continue Improvement to GUI