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