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;
a bow-tie-shaped slit formed in the rectangular conductor sheet, the rectangular conductor sheet comprising 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.
2. The wideband antenna according to claim 1 , wherein:
the bow-tie-shaped slit is formed in a shape comprising laterally joined-two rhombuses, laterally joined-two triangles, or a lateral 8-shape.
3. The wideband antenna according to claim 1 , wherein:
the bow-tie-shaped slit comprises a length to be resonant at low frequencies in a wavelength band for transmission/reception, and the auxiliary antenna element comprises two elements each comprising a length to be resonant at high frequencies in a wavelength band for transmission/reception.
4. The wideband antenna according to claim 2 , wherein:
the bow-tie-shaped slit comprises a length to be resonant at low frequencies in a wavelength band for transmission/reception, and the auxiliary antenna element comprises two elements each comprising a length to be resonant at high frequencies in a wavelength band for transmission/reception.
5. The wideband antenna according to claim 1 , wherein:
the rectangular conductor sheet, the bow-tie-shaped slit and the auxiliary antenna element are formed simultaneously by stamping a metal sheet.
6. The wideband antenna according to claim 1 , wherein:
the bow-tie-shaped slit is formed in a shape comprising laterally joined-two rhombuses or a lateral 8-shape.