Wideband antenna
View Patent ↗A wideband antenna has: a rectangular conductor sheet; a bow-tie-shaped slit formed in the rectangular conductor sheet, the rectangular conductor sheet having two apex portions defined by the bow-tie-shaped slit, the two apex portions being opposite to each other in the middle of the bow-tie-shaped slit; an auxiliary antenna element formed to extend along the bow-tie-shaped slit on both sides of one of the two apex portions; a power-feeding portion formed at the one of the two apex portions; and a grounding portion formed at an other of the two apex portions.
1. A wideband antenna, comprising:
a rectangular conductor sheet;
an odd-shaped slit with a laterally elongated rhombic or tapered shape formed in the rectangular conductor sheet so that a notch slit is formed to extend from side-corner portions of the odd-shaped slit toward the long sides of the rectangular conductor sheet;
an auxiliary antenna element formed to extend from one side-corner portion of the side-corner portions into the odd-shaped slit;
a power-feeding portion formed at a base of the auxiliary antenna element; and
a grounding portion formed in the other side-corner portion of the mutually opposite side-corner portions of the notch slit.
2. The wideband antenna according to claim 1 , wherein:
the odd-shaped slit with a laterally elongated rhombic or tapered shape is formed to be positioned on the upper side of the rectangular conductor sheet, and a grounding portion is formed on the lower side of the rectangular conductor sheet to the odd-shaped slit.
3. The wideband antenna according to claim 1 , wherein:
the power-feeding portion is electrically connected to the rectangular conductor sheet.
4. The wideband antenna according to claim 1 , wherein:
the power-feeding portion is formed at the one side-corner portion.
5. The wideband antenna according to claim 1 , wherein the auxiliary antenna element has a rectangular shape.