WIRELESS MICROPHONE DEVICE

摘要

[PROBLEMS] To provide a wireless microphone device capable of reducing a circuit substrate where an oscillation circuit is provided without degrading the radiation characteristic. [MEANS FOR SOLVING PROBLEMS] A wireless microphone device includes: a circuit substrate (5) divided into circuit regions (11a, 11b) so that each of the circuit regions functions as an antenna element of a dipole antenna; an oscillation circuit (21) arranged in the circuit region (11b) and generating a high-frequency signal according to an audio signal from a microphone (2a); a power supply channel for supplying the high-frequency signal to a conductive layer (11) in the circuit region (11b); and a high-frequency shield covering at least a part of the power supply channel. The high-frequency shield is formed by a metal case (12) having an opening at its bottom. The metal case (12) covers the power supply channel and connected to the conductive layer (11) in the circuit region (11b).