Title :
Investigation of close-in passive intermodulation distortion on antennas
Author :
Steer, Michael B. ; Wetherington, Joshua M. ; Wilkerson, Jonathan R.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
Abstract :
Passive intermodulation distortion (PIM) generated on antennas is experimentally investigated and shown to agree with calculations based on an electro-thermal origin. Two-tone testing is used in the investigations with tone spacings ranging from 3 Hz to 100 kHz. The two-tone measurement system has a minimum spurious-free dynamic range of 125 dB at 3 Hz tone separation. Results show that at least some of the PIM generated by an antenna is due to electro-thermal effects but it is apparent that there are sources of PIM that cannot be described by electro-thermal effects alone.
Keywords :
antennas; intermodulation distortion; antennas; electro-thermal effects; frequency 3 Hz to 100 kHz; passive intermodulation distortion; two-tone measurement system; two-tone testing; Antenna measurements; Distortion measurement; Feeds; Frequency measurement; Intermodulation distortion; Transmission line measurements;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2013 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4673-5315-1
DOI :
10.1109/APS.2013.6711784
