Low-band radiator and multi-broadband antenna comprising same

A multi-broadband antenna, comprising:

• a reflector;
• a plurality of high-band radiators arranged in the direction of one surface of the reflector;
• a plurality of low-band radiators arranged to be spaced apart from the high-band radiators and at a predetermined interval in the direction of one surface of the reflector,
• wherein each of the plurality of low-band radiators comprises:
• a radiation substrate;
• a first dipole radiation portion formed from a conductor line on one surface of the radiation substrate and comprising two first loop arms each having the length extending in a predetermined first direction and formed in a loop shape with a partially open structure;
• a second dipole radiation portion formed from a conductor line on one surface of the radiation substrate, comprising two second loop arms each having the length extending in a predetermined second direction and formed in a loop shape with a partially open structure, and disposed so as to intersect the first dipole radiation portion;
• and
• a balun portion coupled between the reflector and the other surface of the radiation substrate, supporting the radiation substrate, and applying power feeding signals, corresponding to each of the first and second loop arms, to two open ends of the loops,
• wherein each of the first loop arms and the second loop arms has at least one meander line formed in the inner direction of the loop at a predetermined position of the loop-shaped conductor line;
• and
• wherein each of the low band radiator further includes a parasitic patch formed on the other surface of the radiation substrate at a position that overlaps a predetermined meander line among at least one meander line of each of the first loop arms and the second loop arms.