FILTER FEED NETWORK AND BASE-STATION ANTENNA

Provided is a filter feeding network, including a dielectric substrate (1), where a surface of one side of the dielectric substrate (1) is provided with a microstrip line (2), and a surface of the other side of the dielectric substrate (1) is provided with a metal ground (3); the microstrip line (2) includes first and second power division circuits (21, 21'), and first and second filter circuits (220, 220'); an input end and an output end of the first filter circuit (220) are respectively connected to an input end and an output end of the first power division circuit (21) correspondingly, an input end and an output end of the second filter circuit (220') are respectively connected to an input end and an output end of the second power division circuit (21') correspondingly, and the input end of the first filter circuit (220) and the input end of the second filter circuit (220') are in conduction with the metal ground (3); and the output end (212) of the first power division circuit (21) feeds at least two array antenna units for -45° polarization, and the output end (212') of the second power division circuit (21') feeds at least two array antenna units for +45° polarization. The present invention further provides a base station antenna. The filter feeding network is highly integrated, has a small weight and a small volume, and is suitable for large-scale production.