ANTENNA DEVICE CAPABLE OF VARIABLE TILT BY BAND

摘要

The present invention relates to a variable tilt antenna device by each band. The antenna device includes a common antenna, a phase shifter for each band; a first duplexer corresponding to each shifter from input and output ports; and a second duplexer corresponding to each device from each shifter. The antenna additionally includes a low frequency device which only can access the low frequency band shifters among the shifters on the outside of an end device of an array. The present invention enables a more compact antenna device design and removes the service shadow areas regarding the low frequency band.