The invention relates to a small-sized
coplanar waveguide fed ultra-
wide band antenna, and belongs to the technical filed of
wireless communication. The small-sized
coplanar waveguide fed ultra-
wide band antenna comprises a rectangular FR4
dielectric slab with the
dielectric constant being 4.6, a first step-type
microstrip structure, a second step-type
microstrip structure, a double-arch-
bridge type microstrip structure, a moon-shaped microstrip structure, a rectangular microstrip structure, a rectangular microstrip feedline, a first arc-slope-shaped microstrip structure and a second arc-slope-shaped microstrip structure, wherein the first step-type microstrip structure, the second step-type microstrip structure, the double-arch-
bridge type microstrip structure, the moon-shaped microstrip structure and the rectangular microstrip structure form a
radiation sticker with a small semi-circular groove, a big semi-circular groove and a rectangular groove; the first arc-slope-shaped microstrip structure and the second first arc-slope-shaped microstrip structure form a common ground structure; a gap is formed between the first arc-slope-shaped microstrip structure and the rectangular microstrip feedline as well as between the second arc-slope-shaped microstrip structure and the rectangular microstrip feedline, so that
coplanar waveguide is formed. The small-sized coplanar
waveguide fed ultra-
wide band antenna provided by the invention is simple in structure, compact in size, low in cost, high in precision, wide in
frequency band, good in
radiation characteristic, easy to integrate and suitable for small and portable ultra wide band
terminal equipment.