Magnetic absorbers for passive intermodulation mitigation

A wireless communication system comprising:

• an antenna;
• one or more electrically conductive passive linear medium portions electrically interconnected with one or more electrically conductive passive nonlinear medium portions, such that when the antenna radiates electromagnetic first and second waves at different respective frequencies F1 and F2, the first and second waves induce respective first and second currents propagating through the one or mor passive nonlinear medium portions, the one or more passive nonlinear medium portions mixing the first and second currents to generate a third current having a frequency nF1+mF2 and propagating along the one or more passive nonlinear and one or more linear medium portions, m and n being positive or negative integers;
• and
• a material disposed on the one or more passive linear, but not the one or more nonlinear, medium portions and absorbing at least a portion of the third current.

A wireless communication system comprising:

• one or more antennas;
• a plurality of spaced apart electrically conductive first sections;
• a plurality of electrically conductive second sections interconnecting the first sections, such that when the one or more antennas radiate electromagnetic first and second waves at different respective frequencies F1 and F2, the first and second waves induce respective first and second currents at the respective F1 and F2 frequencies propagating through the first and second sections, the first sections mixing the first and second currents to generate a third current at a frequency Fi different from F1 and F2, such that the third current propagates along the first and second sections and causes the first, but not the second, sections to radiate electromagnetic waves at the Fi frequency;
• and
• a material disposed on an electrically conductive surface of each second section to absorb at least a portion of the third current propagating along the second section.