The present application relates to a cellular base station antenna, including: a radome having a lateral recess that defines a first accommodating space with a lateral opening and for accommodating a pole, where the cellular base station antenna should be mounted to the pole; and an antenna assembly mounted within a second accommodating space defined by the radome, the antenna assembly including a reflecting plate and a radiating element mounted on the reflecting plate. Moreover, the present application relates to a pole assembly, including a pole and a cellular base station antenna capable of being mounted laterally to the pole.