An Effective Method Using Reverberation Chambers to Measure TRP From Mobile Phones and Power Absorbed by User Body

Abstract

In this article, an effective method using reverberation chambers (RCs) to measure the total radiated power (TRP) from mobile phones (MPs) is shown. The method exploits a novel measurement setup that links the MP under test inside the working volume of the RC to a real external wireless communication system. Therefore, no radio base station emulator (BSE) is necessary in the proposed method. For the aim of the method, we have found that the connection of the MP under test with the real wireless network system is held stable by the measurement setup in both line of sight and non-line-of-sight configurations. Hence, TRPs from MPs are measured in different conditions of connection even though the received and transmitted signals are not completely controllable. Measured TRPs are shown up to maximum values, which are useful for both electromagnetic interference evaluation and human exposure assessment in a world where wireless devices are spreading more and more. By maximum TRP values, which meaningfully allow result comparisons regardless of the use or not of a BSE, we also show a novel method to estimate the part of TRP absorbed into user body during a call.