Influence of Eliminating Peak Limit in CISPR11 on Satellite Broadcasting

It has been proposed that the emission peak limit in the frequency band of 11.7-12.7 GHz be eliminated in a future revision of CISPR11. If the limit is eliminated and microwave ovens emitting fifth harmonics at a high peak level become widespread, 12-GHz-band satellite broadcasting reception could be disturbed. In this paper, we discuss the influence of eliminating the peak limit on current and UHDTV (4K/8K) satellite broadcast reception in Japan, estimated by using the required D/U of the broadcasting system and the directional characteristics of the dish antenna.