System Calibration Fernando Rodriguez-Morales August 7 th, 2007.
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Transcript of System Calibration Fernando Rodriguez-Morales August 7 th, 2007.
![Page 1: System Calibration Fernando Rodriguez-Morales August 7 th, 2007.](https://reader035.fdocuments.in/reader035/viewer/2022062500/5697bfe31a28abf838cb4b7a/html5/thumbnails/1.jpg)
System Calibration
Fernando Rodriguez-Morales
August 7th, 2007
![Page 2: System Calibration Fernando Rodriguez-Morales August 7 th, 2007.](https://reader035.fdocuments.in/reader035/viewer/2022062500/5697bfe31a28abf838cb4b7a/html5/thumbnails/2.jpg)
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Outline• Overview• Network analyzer measurements
– Calibrated delay– Antennas
• Delay-line response• Other measurements
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Calibration overview– Transmitter/receiver
transfer function is determined
– Antenna response is determined.
Calibration is used to remove systematic errors from the measured data.
Calibrated delay
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Network Analyzer Measurements
• Used to determine the transfer function of a calibrated delay.
• S-parameter files are downloaded and stored in a computer.
• Phase and amplitude information available.
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Left Antenna
4 3 2 1
Right Antenna
2 3 41
Computer
GP
IB I
nte
rfa
ce
VNA
Network Analyzer Measurements
The VNA is also used to determine the transmission coefficient of the antennas (from the reflection coefficient).
Computer
Left antennas Right antennas
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Delay line measurements
• Performed to compensate for amplitude and phase differences in the system.
• Transmit/record waveforms for different bandwidths and pulse durations.
• System response (including power amplifiers) can be determined.
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Delay line measurements
Delay line setup Sample waveforms
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Other Measurements
Fly over the ocean (or smooth surface) to collect data over a distance of 10-20 km.
Roll measurements to determine antenna patterns.
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