Description

PCB Simple EMC Near Field Magnetic Field Probe (Type II): Extra Large (Type II): The probe part has a width of about 5.5cm, a thickness of about 2.3mm, and a length of about 10cm. Large (Type II): The probe part has a width of about 2.5cm, a thickness of about 2.3mm, and a length of about 10cm. Medium (Type II): The probe part has a width of about 1.6cm, a thickness of about 2.3mm, and a length of about 10cm. Small (Type II): The probe part has a width of about 1.0cm, a thickness of about 2.3mm, and a length of about 10cm. Electric field probe (non-contact): The length of the probe part is about 10mm, the thickness is about 2.3mm, and the length is about 10cm. Large, medium and small working bandwidth of magnetic field probe: 1MHz-7GHz Measured frequency response diagram (large, medium and small) (1MHz-7GHz) Extra large working bandwidth: 9KHz-7GHzHz Measured frequency response diagram: Although the curve above 100MHz is not very flat, it can be seen that the bandwidth can reach 7GHz Regarding Type I, Type II, Type III, my suggestion: For beginners, please choose I-type probe. Since the sensor of the I-type magnetic field probe (large, medium and small) is bare (not shielded), it not only receives the magnetic field signal, but also receives the electric field signal, giving people the feeling that the sensitivity is better, I I think in theory it should be called an electromagnetic field probe. The disadvantage of Type I is that it is easily disturbed by electric field signals in the external environment. The type II magnetic field probe adopts a semi-shielded structure. The three sides of the magnetic field induction coil are shielded by copper skins, and one side is exposed to the air. The shielding effect of external electric field clutter is between type I and type III. The type III magnetic field probe adopts a fully shielded structure, which greatly suppresses the electromagnetic field clutter interference in the external environment and improves the ability to resist common mode interference. It is a veritable magnetic field probe.