PRIME Antenna Inc.PRIME Antenna Inc.

Antenna Test TeamAntenna Test Team

Adam StraubingerAdam Straubinger

Alan CondinoAlan Condino

Thanh HongThanh Hong

Ronnie BergRonnie BergSam GregorioSam Gregorio

Background Information

•Antennas

•Serves as a “transducer”

RequirementsRequirements• Test: Test: Power vs Power vs radiation angle radiation angle

Power vsPower vsfrequency patternsfrequency patterns

• Compare results with Compare results with established dataestablished data

Major Tasks/System Major Tasks/System ComponentsComponents

• Design and build an anechoic test Design and build an anechoic test chamberchamber

• Power SupplyPower Supply

• Motor and Motor DriverMotor and Motor Driver

• Integrate test equipment into the Integrate test equipment into the anechoic test chamberanechoic test chamber

• Test, gather, analyze and interpret Test, gather, analyze and interpret datadata

SYSTEM COMPONENTS

•Anechoic Test Chamber•Motor and Motor Driver Power Supply•Power Supply•Computer/Hardware Interface•Testing Program•Test Equipment and Interface

Antenna Range Block Antenna Range Block diagramdiagram

• Anechoic• Wooden Box

TEST CHAMBER

ROTARY TURNTABLE

•Height adjustable from 12”–24”

•4” machinist’s rotary table

Motor DriveMotor Drive Stepper MotorStepper Motor

Block Diagram of Motor Block Diagram of Motor DriveDrive

MODE 0

B-

POWER TRANSISTOR

MODE 1

UNIPOLAR STEPPERMOTOR

Q1TIP122

SENSERESISTORS

0

10VPIC16F628

M+

A-

Q1TIP122

SCALE RESISTORS

Q1TIP122

B+Q1TIP122

123

4 5 6

A+

DIRECTIONSTEP

Manual Manual Motor Motor

ControlControl

SW SPDT

STEP

0

DIRECTION

MANUAL

PIC12F675

PCCONTROL

SW PUSHBUTTON

R2

FORWARD

VCC

VCC

REVERSE

MOTOR DRIVE

Power SupplyPower Supply

• The Power supply The Power supply converts 115V 60 Hz converts 115V 60 Hz input from a wall input from a wall socket and is socket and is connected to a step connected to a step down transformer down transformer module, rectified and module, rectified and filtered to +10V and filtered to +10V and +5V.+5V.

Block Diagram of Power Block Diagram of Power SupplySupply

OUTPUT

0

+12V

J 1

P L U G A C M A L E

1 2

3

D 1L T1 0 2 9

ACTIVE

LT1085-5

0

NEUTRAL

F 1

1 2 0 V 4 A

R 2

1 k0

FRONTPANEL

C 41 0 0 u F

+5 V O U T

LT1085-5

D 2

0

C 22 2 u F

5VREGULATOR

R 1

3 9 00

10VREGULATOR

0

S W 1

S P S T

115V60Hz

C 31 0 u F

INPUT

C 11 0 u F

12VUNREGULATED

0

+1 0 V O U T

D 3

Block Diagram of Optical Block Diagram of Optical SensorSensor

+ 5V

R

C 2

. 1 u FTCYS5201

1

2

3

V OLTA GE OUT

Blocked path=5V

Unblocked path=0.5V

path

(see note)

note

AND

R 1

1 k

Graphic User Graphic User InterfaceInterface

• Automated antenna testing through Automated antenna testing through LabVIEW graphic user interface (GUI).LabVIEW graphic user interface (GUI).

• Antenna position and GPIB control for Antenna position and GPIB control for data acquisition.data acquisition.

• Test data collected is processed and Test data collected is processed and displayed graphically. displayed graphically.

• Laboratory Virtual Instrument Laboratory Virtual Instrument Engineering Workbench. Engineering Workbench. http://www.ni.comhttp://www.ni.com

Graphic User InterfaceGraphic User Interface

Automated Antenna Automated Antenna TestingTesting

• Start by selecting Start by selecting test frequency test frequency and power.and power.

• Select azimuth Select azimuth test parameters. test parameters.

• Ready to TestReady to Test

Automated Antenna Automated Antenna TestingTesting

• Select desired Select desired instrumentation.instrumentation.

• Select data Select data achieving achieving options. options.

Automated Automated Antenna Antenna TestingTesting

• Begin Auto TestBegin Auto Test

• Measured Power Measured Power and testing and testing progress is progress is displayed.displayed.

Automated Antenna Automated Antenna TestingTesting

• End End of of TestTest

Single Single StepStep Mode Mode

• Press STEP Press STEP for each for each step. step.

• Test Test equipment equipment is controlled is controlled manuallymanually

Error CheckingError Checking

• Press Press STEP for STEP for each each step. step.

• Test Test equipmeequipment is nt is controlled controlled manuallymanually

Test Signal Test Signal Reference Reference

• Signal Signal generatiogeneration to 3.2 n to 3.2 GHzGHz

• Power Power output output from -136 from -136 to +10 to +10 dBm.dBm.

Power Measurement Power Measurement

• Signal Signal measurememeasurement to 6.2 nt to 6.2 GHzGHz

• -166 dBm -166 dBm sensitivity.sensitivity.

Review of ExpensesReview of Expenses

Chamber/ContructionChamber/Contruction $380$380

Rotary Table Rotary Table $129$129

Stepper Control Stepper Control $40$40

RF Cables/Connectors RF Cables/Connectors $50$50

Total Costs Total Costs $599$599

Subsidized Costs Subsidized Costs $349$349

Final ExpensesFinal Expenses $250$250

Microsoft Project Document

ConclusionsConclusions

AccomplishmentsAccomplishments

•A viable automated RF testing A viable automated RF testing chamberchamber

•Accurate automated testing Accurate automated testing system system

Questions?Questions?