Antenna module for small device with a ground expansion member
Proposed is an antenna module for a small device, wherein the antenna module is expanded to a ground area through a metal plate, a metal wire, or a connector FPCB and the like to improve antenna gain. The proposed antenna module for a small device is provided with an antenna, and comprises: a circuit board mounted inside a housing of a small device; and a ground expansion member which is mounted inside the housing, comprises one of the metal plate, the metal wire, or the connector FPCB, and has a first end connected to a ground line of the antenna.
1 . An antenna module for a small wearable device comprising: a circuit board provided with an antenna and mounted inside a housing of the small wearable device; an auxiliary circuit board mounted in the housing of the small wearable device and spaced apart from the circuit board, and a flexible printed circuit board for a connector provided with a plurality of conductor patterns and connecting the circuit board and the auxiliary circuit board through some of the plurality of conductor patterns, wherein the some of the plurality of conductor patterns form a connector pattern to connect the circuit board and the auxiliary circuit board and remaining conductor patterns of the plurality of conductor patterns form a ground pattern to connect to a ground line of the antenna, wherein the ground pattern constitutes a ground expansion member having a second end not connected to the ground line to constitute an independent ground terminal to improve a gain from 2 dB to 4 dB; and wherein the housing has a reinforcing wall formed on an inner wall of the housing, the reinforcing wall having an insertion hole formed in a region where the reinforcing wall and the inner wall are in contact, and the flexible printed circuit board is inserted into and fixed to the insertion hole.