DC BLOCK WITH BAND-NOTCH CHARACTERISTIC USING A DEFECTED GROUND STRUCTURE

摘要

A DC block having a band blocking characteristic using a DGS(Defected Ground Structure) is provided to reduce a size of the DGS by extending a length of an etching region by a metal region, thereby reducing a size of a communication system. In a DC block having a band blocking characteristic using a DGS, a pair of coupled lines(10a,10b) are disposed at one side of a dielectric substance(5) in parallel with each other, and block a flow of a direct current. An etching region(21) is formed at the other side of the dielectric substance(5) in correspondence with the coupled lines(10a,10b), and is formed by etching a part of a ground surface(7) attached to the dielectric substance(5). And at least one DGS(20) is formed in the etching region(21), and has a metal region(23).