CARD TYPE RADIO CALL RECEIVER

摘要

PURPOSE: To reduce the deterioration of receiving sensitivity that is caused by the built-in battery of a card type radio call receiver whose case serves as an antenna. CONSTITUTION: Two square conductor plates 1 and 2 are fixed together via an insulator frame 3. The case of a radio call receiver serves as a loop antenna where a corner part A-A' is set as a feeding point and the corner parts B-B' and C-C' opposite to each other are set as the short-circuit points of the short- circuit conductors 4. Then a button-shaped battery 5 built into the receiver case is located at a position near the part C-C' that is remotest from the point A-A'.