Summary
International Symposium on Electromagnetic Compatibility
2009
Session Number:21R3
Session:
Number:21R3-3
Total Radiated Power Measurement above 1 GHz with Partially-Spherical Scanning of a Probe
T. Watanabe, K. Nakajima, A. Sugiura, H. Arai,
pp.177-180
Publication Date:2009/7/20
Online ISSN:2188-5079
Summary:
The total radiated power (TRP) measurement is very useful for small electronic equipment, such as PCs and cell phones, to evaluate its potential of harmful interference to radio reception. Hence, reverberation chamber has been investigated as a candidate for the measuring facility of the TRP in the frequency range above 1 GHz. In this connection, the present paper deals with the improvement of the conventional TRP measuring facility where a probe antenna is spherically rotated around an EUT. (1) To reduce unwanted reflection from the EUT turn table, it is supported by a cantilever arm that is made of “Rohacell" material instead of glass-reinforced plastic. (2) As an alternative to the CITA ripple test, a new method is proposed to evaluate unwanted reflection of the surrounding walls and the turn table, where the concept of the radar cross section (RCS) is introduced. (3) To reduce the shadow and measurement time, a hemi-spherical scanning measuring system is developed using a metal-top EUT turn table.