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(11) | EP 0 468 413 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Plane antenna with high gain and antenna efficiency |
| (57) A plane antenna with high gain and antenna efficiency. The antenna includes an antenna
unit comprising: a first dielectric body; a first grounding conductor body provided
on a lower side of the first dielectric body; a current supply line in a form of a
strip line provided on an upper side of the first dielectric body; a patch shaped
radiative element provided on the upper side of the first dielectric body at an end
of the current supply line; a second dielectric body formed on the upper side of the
first dielectric body over the radiative element and the current supply line; and
a second grounding conductor body provided on the upper side of the second dielectric
body, which has a slot at a position located directly above the radiative element;
wherein the radiative elements and the slots of the plane antenna are arranged in
a planar array with a constant interval in two orthogonal directions, where the constant
interval has a value equal to 0.72 to 0.93 or more preferably 0.85 to 0.93 times a
wavelength corresponding to a central frequency of a frequency band for waves to be
used. |