Patent ID: 9368874
Filing Date: 2016-06-14
CPC Classification: H01Q

Claim Text:
1. A log-periodic dipole array antenna comprising: a dielectric substrate; a radiating element having a plurality of lines extending from a center to an outer side and symmetrically arranged on the dielectric substrate based on the center, so as to resonate in a first frequency band and a second frequency band, the plurality of lines being connected at the center or the outer side of the radiating element in an alternating manner, the lines becoming longer going from up to down of the radiating element fed according to a predetermined log-periodic ratio; and a band stopper selectively formed on either an upper side or lower side of one point for connecting the lines to each other to reduce an antenna gain in a first adjacent frequency band or a second adjacent frequency band, wherein the first frequency band is higher than the second frequency band, and wherein the first adjacent frequency is adjacent to the first frequency band and the second adjacent frequency is adjacent to the second frequency band.