Mitigation Techniques for Enhancing Mobile Radio EMC Performances J. Gavan , S. Tapuchi Sami Shamoon College of Engineering Ashdod Israel Faculty of Engineering – Electrical and Electronics Engineering E-mail Jacobg@sce.ac.il E-mail tapuchi@sce.ac.il Abstract The number of mobile Radio equipments has increased tremendously which enhance harmful mutual interference and people exposed to non ionized radiation .The levels of Electromagnetic field effects from base stations affecting people are significantly lower than from headsets due to the separation distances and far field propagation conditions.Are presented main mitigation techniques for enhancing base station performances and a thorough analysis of near field mobile headsets EMF effects. Main headsets mitigation techniques are discussed: Using an auxiliary antenna, distancing the headset radiating parts from their users, space polarization diversity and meta- material antennas. Simulation and computation results are added. 1. Introduction A tremendous increase in the number of mobile radio users, equipment and systems enhances the probability of receivers and people exposure to interference and of non ionized radiation effects. Therefore efficient mitigation techniques are required to reduce Electro-Magnetic Field (EMF) pollution, interference and improve radio communication performances [1,2]. The sources of Radio interference and EMF effects are derived from the offender Transmitters (Tx) and the victims are the systems multitude of Receivers (Rx) and individual human mobile headset users, who are exposed to mutual interference and to parasitic EMF thermal non ionized radiation [3,4]. 2. Base Stations EMF Pollution Mitigation Techniques. When security parameters are respected ,the people and Rx exposed to base station effects are located in the well defined Fraunhofer Far Field (FF) radiation zone. In the FF zone the radiated power density levels decrease as the square of the separation distance d and in several cases even more as shown in Figure 1[3,4]. The base stations TX power density S in W/m 2 and other EMF parameters are also very easy to measure and compute as described in figure 1 due to the FF propagation conditions [3,5]. Fig 1 – The Radio Radiation Effects in the Far Field of a Base Station Transmitter 978-1-4244-6051-9/11/$26.00 ©2011 IEEE