To solve the problem that it is difficult to control so that a small-sized slot antenna is operated over a wide band, the main beam direction is kept in the same direction in the band, and the main beam half-value width is not unnecessarily varied.
Disclosed is the 1/4-effective-wavelength slot antenna which makes a ground conductor 103 having finite area function as a dipole, where a portion of a feed line 113 in an region of intersection with the sot 111 is formed in a loop shape 123, side edges 15c and 15d of the ground conductor 103 are partially bent toward the slot 111 before reaching a ground conductor outer edge 105a on a side in a depth direction 109a from a ground conductor outer edge 105a on a side in a main beam direction 109a, and a portion of the ground conductor is partially cut in an area 105bco.
FUJISHIMA TAKEYASU
| JP2004282568A | 2004-10-07 | |||
| JP2005027317A | 2005-01-27 | |||
| JPS31464B1 | ||||
| JP2003101337A | 2003-04-04 | |||
| JPS62165403A | 1987-07-22 |
Hiroki Naito
Daisuke Nagano