| 摘要 |
PURPOSE:To achieve a smaller size and higher operability of the equipment, by making a sample approach and move to simple transmission line produced simply by having a dielectric plate equipped with a metal strip. CONSTITUTION:Metal plates 21 and 22 are arranged on a dielectric plate 1 at an appropriate interval and a slot line 3 is formed with a clearance obtained. A high frequency power is supplied from a power source G at one end of a transmission line while non-reflection final end is connected to the other end of the line to detect a reflected wave. Or a power detector is placed to detect changes in a passing power and a detection signal is computer processed. Here, for example, a sample T1 of a flat plate is moved along the surface of a metal plate crossing the line 3. As the length and size of a foreign matter (f) contained in the dielectric body T, the aspect thereof to the feeding direction and the like are at random factors, the detection can be done easily by changing the angle between the clearance and direction of feeding a sample. |
