| 摘要 |
A high-frequency communication apparatus has a case (1, 4, 5, 20, 21) containing a transmitter-receiver including circuit elements (2). A functional structure (5-1, 5-2, 20-1, 20-2, 20-3, 21-1) capable of confining radiation energy radiated by unnecessary radio wave source to prevent the radiation energy from interfering with the operations of the transmitter-receiver is formed on at least one of the walls of the case by forming a plurality of projections (5-1, 21-1) in regular arrangement by press working. The circuit elements of the transmitter-receiver are packed in the case to suppress the undesired electromagnetic coupling of internal and external electromagnetic waves with the circuit elements of the transmitter-receiver. <IMAGE> |
