| 摘要 |
PROBLEM TO BE SOLVED: To prevent noises from being taken inside or transmitted by connecting an antenna to a sensor head via a connector set on both the antenna and the sensor head. SOLUTION: The sensor is composed of a sensor head 1, a light source 5 for an incident light to the sensor head 1, a photodetector 6 for receiving a projected light from the sensor head 1, a measuring device 7 for measuring an electric field intensity from an output of the photodetector 6, an antenna 15 for receiving an impressed voltage and inputting to the sensor head 1, etc. A dipole antenna is used as the antenna 15. A connector 3 is fitted to both the dipole antenna 15 and the sensor head 1, so that the dipole antenna 15 and sensor head 1 are connected via the connector 3. Electromagnetic noise can be measured while there is no possibility of other noises than received at the dipole antenna 15 being brought inside. Moreover, noises are not transmitted to the environment. |
