帯域を考慮したテレビ放送受信用LMSアダプティブ八木・宇田アレーアンテナの特性

抄録

When we watch TV program, interference appears on the screen due to unwanted radiowave propagation through receiving antennas and sometimes causes unacceptable degradation of receiver performance. The authors proposed an LMS adaptive Yagi-Uda array antenna for TV reception to surpress such an interference. Its characteristics were investigated for narrow band signals. In this paper, we study this antenna system in consideration of TV signal bandwidth. The method of moment is used to take mutual coupling effects into account and to obtain received signal at the antenna output. As a result, the proposed antenna was influenced by the bandwidth of the interference signal, as the arrival direction of an interference signal "ψ" became larger, but it was obtained that the proposed antenna could improve the output DUR more than 10[dB] in comparison with the conventional eight element Yagi-Uda antenna for VHF all-band reception.