Patent ID: 8648753

Claim:
An antenna device, comprising: a base having an internal thread for an external thread; a first antenna element; a first circuit board which is arranged on the base, electrically connected to the first antenna element, and amplifies a signal output from the first antenna element; a shielding case arranged on the first circuit board, the shielding case having a top board; a second antenna element arranged on the top board of the shielding case; and a second circuit board which is electrically connected to the second antenna element and amplifies a signal output from the second antenna element, wherein the shielding case covers the second circuit board, the first circuit board includes a first fixation section for the external thread, the shielding case includes a second fixation section for the external thread, and the first circuit board and the shielding case are fixed to the base by the first fixation section and the second fixation section being screwed together due to the external thread being screwed into the internal thread.