초록 ▼

A novel leakage radiation preventing element effectively prevents radio waves from being radiated from an electronic appliance, without depending upon a capacitor or a choke coil. The leaked current I.sub.os and I.sub.or generated from a hole or a gap formed in a casing or a chassis is introduced in

A novel leakage radiation preventing element effectively prevents radio waves from being radiated from an electronic appliance, without depending upon a capacitor or a choke coil. The leaked current I.sub.os and I.sub.or generated from a hole or a gap formed in a casing or a chassis is introduced into a wave guide path and then attenuated by radio wave absorption function of a magnetic substance disposed therein. A coaxial conductor (2) is passed through a hole (107) formed in a chassis (3). The wave guide path (104) is formed between the chassis and a conductive disk (101) electrically floated from the chassis. A radially outward end of the wave guide path (i.e., the outer circumferential end of the conductive disk) is shorted to the chassis at high frequency, and further the inside of the wave guide path is filled with a ferrite ring (102). Therefore, when being propagated along the wave guide path, the high frequency current leaked from the hole or gap of the chassis is absorbed by the ferrite ring, without being radiated to the outside.

대표청구항 ▼

[ What is claimed is:] [1.] A leakage radiation preventing element, comprising:a coaxial conductor composed of an inner conductor and an outer conductor and disposed so as to pass through a chassis of an electronic appliance electrically insulated from the chassis;a conductive disk connected to the

[ What is claimed is:] [1.] A leakage radiation preventing element, comprising:a coaxial conductor composed of an inner conductor and an outer conductor and disposed so as to pass through a chassis of an electronic appliance electrically insulated from the chassis;a conductive disk connected to the outer conductor of said coaxial conductor and extending roughly in parallel to the chassis so as to form a space between said conductive disk and the chassis by surrounding said coaxial conductor concentrically; anda magnetic substance formed of ferrite and inserted in the space so as to surround said coaxial conductor concentrically.