Electromagnetic Radiation Study of Commercial Cellular Phones with a TEM Cell for Biological Applications

Electromagnetic radiation effects of the GSM 900 and 1800 commercial cellular phones were estimated using a TEM cell. A standard TEM cell was modified with a double-ended monopole antenna as a signal leader for incoming and outgoing signals between the TEM cell's outer surface. The electric field distribution was studied with parameters such as the cellular phone position, polarization, dialing type, and dialing frequency. The field uniformity can be improved with either the use of a shorter signal leader or the TEM cell with a reduction in size. It also showed a good agreement between the results from experiments and simulations. With the proposed exposure technique, the Specific Absorption Rate (SAR) result from simulation also indicated the energy absorption by the test sample, confirming a potential usage of the proposed setup in studies related to biological applications.