Carrier Aggregation

Carrier aggregation is a technique that is used in wireless communication to increase the data rate per user, whereby multiple frequency blocks (called component carriers) are assigned to the same user.

First introduced in LTE.

This is like a hack that is used a lot in 5G, you combine like two frequency bands?

Note: What is difference between frequency block, component carrier, and Frequency Band?

Is this the same as Link Aggregation?