PRIME Antenna Inc. Antenna Test Team Adam Straubinger Alan Condino Thanh Hong Sam Gregorio Ronnie Berg
Background Information • Antennas • Serves as a “transducer”
• Test: Requirements Power vs radiation angle Power vs frequency patterns • Compare results with established data
Major Tasks/System Components • Design and build an anechoic test chamber • Power Supply • Motor and Motor Driver • Integrate test equipment into the anechoic test chamber • Test, gather, analyze and interpret data
SYSTEM COMPONENTS • Anechoic Test Chamber • Motor and Motor Driver Power Supply • Computer/Hardware Interface • Testing Program • Test Equipment and Interface
Antenna Range Block diagram
TEST CHAMBER • Anechoic • Wooden Box
ROTARY TURNTABLE • Height adjustable from 12”– 24” • 4” machinist’s rotary table
Motor Drive Stepper Motor
Block Diagram of Motor Drive
Manual Motor Control
Power Supply • The Power supply converts 115 V 60 Hz input from a wall socket and is connected to a step down transformer module, rectified and filtered to +10 V and +5 V.
Block Diagram of Power Supply
Block Diagram of Optical Sensor
Graphic User Interface • Automated antenna testing through Lab. VIEW graphic user interface (GUI). • Antenna position and GPIB control for data acquisition. • Test data collected is processed and displayed graphically. • Laboratory Virtual Instrument Engineering Workbench. http: //www. ni. com
Graphic User Interface
Automated Antenna Testing • Start by selecting test frequency and power. • Select azimuth test parameters. • Ready to Test
Automated Antenna Testing • Select desired instrumentation. • Select data achieving options.
Automated Antenna Testing • Begin Auto Test • Measured Power and testing progress is displayed.
Automated Antenna Testing • End of Test
Single Step Mode • Press STEP for each step. • Test equipment is controlled manually
Error Checking • Press STEP • for each step. Test equipment is controlled manually
Test Signal Reference • Signal • generation to 3. 2 GHz Power output from -136 to +10 d. Bm.
Power Measurement • Signal measurement to 6. 2 GHz • -166 d. Bm sensitivity.
Review of Expenses Chamber/Contruction Rotary Table Stepper Control RF Cables/Connectors Total Costs Subsidized Costs $380 $129 $40 $599 $349 Final Expenses $250
Conclusions Accomplishments • A viable automated RF testing chamber • Accurate automated testing system
Questions?
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