Slot antenna having high gain in zenith direction

Details Slot antenna having high gain in zenith direction Slot antenna having high gain in zenith direction

2006-11-14

2006-11-14

Wong, Don (Department: 2163)

Communications: radio wave antennas

Antennas

Slot type

C343S7000MS

Reexamination Certificate

active

07136024

ABSTRACT:
The present invention provides a slot antenna in which the radiation toward the zenith direction is not obstructed although it is arranged on an upper side of a ground conducting plate.The antenna device11operates as the slot antenna by providing a slot14in an upper plate portion13of a shield case12. The shield case12is provided on a ground conducting plate20. The slot14is composed of a first aperture15extending in a straight line, a second aperture16communicating with one end of the longitudinal direction of the first aperture15, and a third aperture17communicating with the other end of the longitudinal direction of the aperture15. The apertures16and17have the same triangular shapes which are point-symmetrical to the center of the aperture15. When the power is fed by a feeding pin18to excite the slot14, the directions of the electric fields generated at the apertures16and17are inclined to the direction of the electric field generated at the aperture15and the electric fields of the apertures16and17cancel the electric field of the aperture15.

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