Magnetic Passive Intermodulation Mitigation System

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Passive intermodulation distortion (PID) is a type of interfering signal caused by the nonlinearities contained within the passive components used within a communication system. When radio frequency connectors contain ferrous metals (nickel or steel), the signal can be altered or distorted, especially under high power conditions. Gold or silver plated connectors will alleviate PID because they do not have magnetic properties; however, given the price of gold and silver, it is a very expensive option.

Purdue University researchers have developed two novel methods of reducing PID in a wireless system. The first method alters the magnetic properties of a connector containing steel or nickel. The result is a connector that has similar PID performance to gold or silver at a lower cost. The second method is a tunable PID cancellation system; the frequency, magnitude, and phase of the signal can be adjusted to precisely remove the unwanted distortion. Both methods can greatly enhance the spectral purity of a signal in a communication system.

Advantages:
-Can be applied to existing connectors containing nickel or steel
-PID reduction similar to silver- or gold-plated connectors
-Configurable to different frequencies

Potential Applications:
-Telecommunications
-Digital Modulation
Dec 5, 2011
Utility Patent
United States
9,306,261
Apr 5, 2016

Jun 4, 2010
PCT-Patent
WO
(None)
(None)

Sep 22, 2009
Provisional-Patent
United States
(None)
(None)

Jun 4, 2009
Provisional-Patent
United States
(None)
(None)
Purdue Office of Technology Commercialization
1801 Newman Road
West Lafayette, IN 47906

Phone: (765) 588-3475
Fax: (765) 463-3486
Email: otcip@prf.org