PURPOSE: To obtain the small sized radio equipment emitting a radio wave of an optimum polarization state efficiently to an external space while most of the radio equipment is inserted to an information terminal.

CONSTITUTION: The equipment is provided with a case 2 of nearly rectangular shape thin and long, having a notch in the vicinity of one end in the lengthwise direction, whose surface is covered by a conductor and containing radio equipments 5, 5', 6, 6', 7, 7' in the inside, a 1st antenna 3 making up of a waveguide arranged to the notch nearly in parallel with the lengthwise direction of the case 2, having an opening at one end of the case 2 in the lengthwise direction, whose opposite end is closed by a conductor in which a dielectric material is filled and whose electric length is nearly 1/4 wavelength, a 2nd antenna provided to one end face of the case 2 in the lengthwise direction via a dielectric plate and having a conductor foil with an area smaller than the face, and a means coupling the 1st and 2nd antennas 3, 4 with the radio equipments with a desired power ratio.