1. Passive intermodulation interference in communication systems;Lui;Electr Commun Eng J,1990
2. Sanford J. Passive intermodulation considerations in antenna design. In: Proceedings of IEEE Antennas and Propagation Society International Symposium; 1993 Jun 28–Jul 2; Ann Arbor, MI, USA. IEEE; 1993. p. 1651–4.
3. TR 37.808: Passive intermodulation (PIM) handling for base stations (BS). 3GPP standard. France: 3GPP; 2013.
4. PIM testing: advanced wireless services emphasize the need for better PIM control;Butler,2017
5. Studies on microwave antennas: passive intermodulation distortion in antenna structures and design of microstrip antenna elements;Hienonen,2005