| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress the disturbance of the communications of other radio equipments. <P>SOLUTION: A smart keyless entry system consists of an onboard machine loaded on a car and a portable machine carried by a crew, and transmits a signal to a receiving means for the portable machine from a transmission antenna 102b (102e) for the onboard machine while the signal from the portable machine is received by the onboard machine and onboard control equipment is controlled. In the smart keyless entry system, the transmission antenna 102b (102e) is configured so as to form a magnetic field corresponding to the transmitted signal in the periphery of the transmission antenna while the magnetic field in the periphery of the transmission antenna 102b (102e) is detected by the receiving means for the portable machine and the transmission antenna is configured so as to receive the signal on the basis of the detected magnetic field. In the smart keyless entry system, the transmission antenna 102b (102e) has a magnetic-field forming means 1020 forming the magnetic field and a meshy electric-field cover member 1022 transmitted through the magnetic field formed by the magnetic-field forming means 1020 while covering the magnetic-field forming means 1020. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
