Partial ground connection of a metal housing for realising certain electrical lenghts for the ground connection of a chip antenna

摘要

In the transmission/reception unit according to the present invention, a first corner (20) of a cover (14), which is located in the vicinity of transmission (7) and reception (8) terminals and a ground terminal (9) of an antenna (6), or the vicinity of the corner, is soldered to a non-ground wiring pattern and an electrical length of the ground conductor from the ground terminal is increased. This ensures that even in a compact transmission/reception unit, the electrical length is equivalent to lambda /4 and the antenna gain is improved; therefore, a transmission/reception unit with a satisfactory transmission/reception sensitivity can be realized. IMAGE