To provide an antenna for use in a mobile communication radio apparatus mainly in microwave and millimeter wave bands.
One side of a ground conductor 3 is used as a ground plane 36, a first power feeding line 33 for feeding power to a first element 1 and a second power feeding line 34 for feeding power to a second element 2 are formed on the other side, and the first power feeding line 33 of the ground conductor 3 and a first antenna electrode 10 are electrically connected by a first power feeding pin 13 inserted into: a through hole 24 provided in the middle portion of an antenna electrode 20, for example, of the second element 2; a through hole provided in a power feeding point 11 of the first element 1; and a through hole 30 provided on the ground conductor 3. The second power feeding line 34 of the ground conductor 3 and the second antenna electrode 20 are then electrically connected by a second power feeding pin 23 inserted into a through hole provided in a second power feeding point 21 and a through hole 31 provided in the ground conductor 3, thereby interaction between the first antenna electrode 10 and the second antenna electrode 20 is reduced.
UENO SHINICHIRO
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Tomoyasu Sakaguchi
Hiroki Naito
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