Now-a-days, wireless services are becoming increasingly present in the people daily lives. UMTS technology is successfully implemented and is already installed everywhere. Wi-Fi service should be tested to coexist with UMTS service, with minimal interference. Hence in typical domestic environments is verified the possibility of coexistence of two antennas, in the same access space. Initially, the characteristic of Wi-Fi antennas parameters are measured. Then the authors measured the effect of positioning the two antennas in vicinity, in different configurations.