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Radiation Pattern Measurements
I have begun a project to try to record antenna radiation patterns of my antenna, using NOAA polar orbiting satellites as the illuminator. I am just starting to get data that shows the idea is feasible. The antenna constructed for 137 MHz, which is the satellite frequency. The received signal strength is recorded from the DC in the IF part of the receiver, so that is an S-Meter reading. So far, I am able to get Excel to grind out "patterns" as a function of Time. When I get more precise, I'll relate Angle to Time so more meaningful plots can be drawn. It is likely that this method of recording real radiation patterns has been done by someone, somewhere. I am now trying to understand how I can correct the data to account for the path loss, which can be as high as 12 dB. My question is, does anyone know of anyone who has already done the math for supporting data acquisition like this "satellite illuminated pattern range". I'm running short on brain power. Jerry |
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