Electromagnetic shielding structure of high-frequency circuit arrangements

An electromagnetic shielding structure of high-frequency circuit arrangements, comprising:

• a mounting member at least the surface of which has been treated to provide electrical conductivity;
• a printed-circuit board having a ground pattern installed on said mounting member, said printed-circuit board being mounted with a plurality of high-frequency functional circuits;
• a molded plastic casing the inside surface of which has been treated to provide electrical conductivity, for housing said mounting member and said printed-circuit board mounted thereon;
• a plurality of ribs formed integral with said inside surface of said molded plastic casing, for separating said high-frequency functional circuits mounted on said printed-circuit board, said ribs having a long groove;
• and
• a shielding member pressed in said long groove of said ribs, said shielding member being a flexible solid material at least the surface of which is electrically conductive, and the top end of said shielding member being pressed against said ground pattern of said printed-circuit board to electromagnetically shield each of said high-frequency functional circuits.