| 摘要 |
PURPOSE:To remove the interference of the transmission wave of an interrogator and the interference due to reflection from a moving body sufficiently by using antennas which discriminates polarites meeting at right angles each other as the antenna of the interrogator. CONSTITUTION:The antennas 11 and 12 of a respondor 102 are arranged so as to meet their polarization planes at right angles each other. The antenna 8 of an interrogator 101 is the one which can receive and transmit by the polarization planes intersecting at right angles, that is a all polarities sensitive antenna having polarity discrimination capability and be used only for a radio wave sent from the transmitting antenna of the responder 102 without attenuation to send it to a receive-detecting part 4. The interference due to noise components included in the transmission wave of the interrogator and transmission wave outputs of the transmitters are removed by the antenna 8. |
