Title :
Ratio of Gaussian PIM to two-carrier PIM
Author_Institution :
Telstar Program Office, Loral Skynet, Bedminster, NJ, USA
fDate :
10/1/2000 12:00:00 AM
Abstract :
Passive intermodulation (PIM) products falling into a satellite´s receiver can adversely affect its gain/system temperature (G/T). The PIM when all carriers are active and modulated, can be simulated by a flat power spectrum. The ratio of the resulting distortion to a two-carrier measurement is calculated in this work. For PIM not to degrade the satellite´s G/T, it should be 20 dB or more below thermal noise over the expected thermal range, which can be achieved in most cases.
Keywords :
Gaussian distribution; intermodulation distortion; satellite links; thermal noise; Gaussian PDF; Gaussian passive intermodulation; Rayleigh PDF; antenna gain/system temperature; below thermal noise; distortion power; flat power spectrum; linear input power; narrowband signals; passive intermodulation products; satellite receiver; two-carrier measurement; two-carrier passive intermodulation; wideband signals; Antenna measurements; Bandwidth; Distortion measurement; Frequency; Polarization; Receiving antennas; Satellites; Temperature; Testing; Transponders;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
