Inter-Band CA

Technical Explanation

Inter-band CA combines carriers from disparate bands, such as low-band FDD (e.g. 700 MHz n28) for robust uplink coverage and mid-band TDD (e.g. 3.5 GHz n78) for high-speed downlink capacity. It requires separate RF front-ends, duplexers, and power amplifiers for each band.

Key Functions

• Pairs coverage bands (sub-1 GHz) with capacity bands (mid-band/mmWave)
• Requires dedicated RF chains and filters for each respective frequency band
• Solves uplink coverage asymmetry while boosting downlink throughput