HIGH-FREQUENCY MODULE

PROBLEM TO BE SOLVED: To provide a high-frequency module that allows improving reliability.SOLUTION: In a high-frequency module 1, a cylindrical shield 4 surrounds the circumference of a transmission circuit 6 mounted on a substrate 2. A choke portion 5 provided on an inner wall of a case 3 facing the shield 4 inverts the phase of a radio wave with a predetermined frequency emitted from the transmission circuit 6 to space on the substrate. For this reason, the radio wave having the phase inverted by the choke portion 5 and the radio wave emitted by the transmission circuit 6 are canceled, thereby preventing leakage of the radio wave to the outside of the shield 4. Thus, it is avoided that the signal generated by the transmission circuit 6 is transmitted to a reception circuit 7 mounted outside the shield 4 through the space on the substrate.