Carrier Aggregation (CA) is a key technology in 4G and 5G mobile networks. It allows a mobile device to simultaneously use multiple carriers, effectively combining their bandwidth to achieve higher data rates.

The main benefits of Carrier Aggregation include the increased Bandwidth and the improved throughput, which in turn improve user experience.

It can also help improve coverage, as the mobile device can utilise the best available carriers, even if they are on different frequency bands.