Full-Duplex Transceiver Architecture

Technical Explanation

Achieving In-Band Full Duplex requires a specialized physical front-end architecture. The transceiver features closely spaced transmit and receive antenna pairs arranged so that their near-field mutual coupling creates a natural electromagnetic null. Combined with analog cancellation circuits that sample the transmit chain and inject an inverted replica into the receive chain, the architecture cancels over 50 dB of self-interference before the ADC.

Key Functions

• Physical antenna placement synthesizing deep near-field electromagnetic isolation nulls
• Analog cross-talk cancellation circuits subtracting transmit leakage before the low-noise amplifier
• Protecting sensitive receiver analog-to-digital converters from transmitter saturation
• Enabling simultaneous transmission and reception on a single cellular frequency carrier
• Fundamental hardware foundation for 6G IBFD base stations and high-speed relays