A dual channel switched RF beamformer for LTE small cell base station receiver

Abstract

This paper presents a dual channel switched RF-front-end beamformer to solve the severe interference problem that affects the LTE small-cell base stations. The beamformer system uses new type of hybrid phase shifter that situated at a later stage of the low-noise amplifier. The proposed system has four cases, and each can generate two opposite, non-overlapping coverage radio beams. Thus, the system can receive signals through two independent channels, either at the same frequency or at different frequencies.