ANTENNA UNIT

The invention provides an antenna unit capable of properly installing an antenna on a frame body. The antenna unit includes a patch antenna (30) and a case. The patch antenna (30) includes a conductive antenna pattern (32) and an antenna ground pattern (33) that functions as ground of the antenna pattern (32) and receives an electric wave. The case has dielectricity, the case being provided with the patch antenna (30). The antenna pattern (32) is provided on an inner wall surface (12a) of a wall portion of the case. The antenna ground pattern (33) is provided on an outer wall surface (12b) ofa wall portion of the case (10) and is positioned so as to face the antenna pattern (32). 本发明提供能够恰当地将天线安装在框体的天线单元。天线单元具备贴片天线(30)及盒体。贴片天线(30)被构成为包含导电性的天线图案(32)以及作为该天线图案(32)的接地而起作用的天线接地图案(33)并接收电波。盒体具有介电性并供贴片天线(30)设置。天线图案(32)被设置在盒体的壁部的内壁面(12a)。天线接地图案(33)形成在盒体(10)的壁部的外壁面(12b)，且位于与天线图案(32)对置的位置。