Summary
International Symposium on Antennas and Propagation
2009
Session Number:3F2
Session:
Number:3F2-5
Radiation Power Measurement Method of Mobile Device Using Field Simulator
Mitsuhiro Tsukamoto, Hiroyuki Arai,
pp.1167-1170
Publication Date:2009/10/21
Online ISSN:2188-5079
Summary:
It is necessary to evaluate the characteristics of antenna built-in mobile devices because their emission characteristics are changed due to the device size and the antenna mounting position. Several methods have been proposed so far as for measuring the antenna built-in radio equipment, i.e. the pattern integration method inside anechoic chamber [1], the random field method (RFM) measured under real propagation environment [2], Wheeler cap method [3], the method with compact shield box [4] or with the reverberation chamber [5] and the partial spherical scanning method with a reflector [6] etc. These techniques have the demerit that the measuring frequency and antenna structure are limited. Moreover, there is the demerit that large scale facility is necessary to move the rotator. We propose an electric power measurement method by simple facility to overcome these demerits. We should decrease the influence of the antenna directivity in the measurement to evaluate the radiation power of antenna built-in mobile devices. To decrease the influence of the antenna directivity and to measure with easy equipment without rotators, it is possible to apply the field simulator which has been used to measure the effect of antenna diversity for radiation power measurement [7]. This paper shows the configuration of a proposed measurement system in the next section. Then, we discuss the size of measurement area inside shield box to neglect the influence of antenna directivity of the mobile device. Finally, we carry out the simulation considering the effect of the phantom to simulate the antenna in realistic environment and we conclude in section 4.