| 摘要 |
<p>PURPOSE:To surely receive information data by complementarily varying impedances of two antennas, whose planes of polarization are orthogonal, based on information data. CONSTITUTION:A first antenna 4BH, a first impedance varying circuit 14H to vary the impedance of the first antenna 4BH, a second antenna 4BV whose plane of polarization is approximately orthogonal to that of the first antenna 4BH, and a second impedance varying circuit 14V to vary the impedance of the second antenna 4BV are provided. Impedances of antennas 4BH and 4BV are complementarily varied based on information data S1. Thus, the noise whose plane of polarization is fixed is discriminated to surely detect only information data S1.</p> |
