| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antenna mixer for avoiding an influence of nonlinear distortion from a large-power transmission broadcast group even when a plurality of small-power transmission broadcasts differing in antenna direction are delivered, and also mixing and outputting reception signals of small-power broadcasts while greatly improving reception quality without excessively attenuating signals of the large-power broadcast group. <P>SOLUTION: As a first antenna-side filter 2BPF, a narrow band-pass filter 2BPF for level difference improvement is provided which suitably attenuates signals of a first intense-electric-field reception object channel group within a range wherein view thereof is secured while preferentially passing a signal of a first weak-electric-field reception object channel. On the side of a second antenna ANT2, meanwhile, a second antenna-side filter 2WPF is provided which is constituted as a wide band-pass filter 2WPF blocking the first intense-electric-field reception object channel group at an attenuation rate higher than that of the first antenna-side filter 2BPF although passing a second weak-electric-field reception object channel group. <P>COPYRIGHT: (C)2009,JPO&INPIT |
