Single-Chip Massive MIMO RF Front End With Integrated Antenna Isolation
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Solution Overview
Problem
The complexity and high cost of hardware in MIMO transceivers, particularly due to the use of multiple antennas, result in bulky implementations and limited scalability, with separate signal paths requiring complex and costly rearrangement or addition of hardware blocks.
Innovation Solution
Analog processing subsystems are integrated onto a single chip, including antennas, power amplifiers, mixers, and duplexers, with each antenna having its own subsystem, allowing for flexible and scalable MIMO transceiver implementations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple separate hardware blocks are used for each antenna in MIMO transceivers, then signal processing capability is improved, but device complexity and hardware cost increase
Solution Approach 1:
The patent combines multiple antenna-specific hardware blocks (power amplifiers, mixers, duplexers) onto a single integrated chip, merging previously separate signal processing paths into a unified integrated architecture that maintains individual antenna processing capability while reducing overall system complexity
Solution Approach 2:
The integrated chip design creates a universal platform that can handle multiple antenna signals simultaneously through shared common components while maintaining dedicated processing paths where needed, allowing the same hardware block to serve multiple antenna functions
2Productivity
If multiple separate hardware blocks are used for each antenna, then signal processing capability is improved, but scalability and ease of rearrangement deteriorate
Solution Approach 1:
By merging multiple antenna processing blocks onto a single chip, the system achieves scalability through chip-level integration rather than system-level assembly, making it easier to add or remove antenna channels by activating or deactivating specific blocks on the same chip
3Reliability
If separate signal paths are used for each antenna, then signal quality is maintained, but hardware cost and implementation complexity increase
Solution Approach 1:
The patent merges multiple separate signal path implementations into a single integrated chip architecture where common components (filters, amplifiers, mixers) are shared across multiple antenna paths, reducing implementation complexity while maintaining dedicated processing capability for each antenna signal
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This integration reduces complexity, cost, and energy consumption while enabling high scalability and performance, with improved interference prevention and reduced energy losses, facilitating high data rates.
Implementation Method 1
The at least one mixer is adapted to down-convert and inphase/quadrature - IQ - demodulate a received analog radio frequency signal
Implementation Method 2
The at least one mixer is also adapted to IQ-modulate and up-convert a transmit analog baseband signal
Implementation Method 3
the antenna structure is adapted to isolate the analog processing subsystem from radiation
Data Source
Figure 1~2
Figure 3~4
AI summary
An analog processing subsystem is disclosed. Said subsystem comprising at least one antenna (202,302), a duplexer (202a,302a), at least one power amplifier (203a,203b), at least one mixer (204a,204b,304a,304b) and an interface connectable to a baseband processing subsystem. The at least one mixer (204a,204b,304a,304b) is adapted to down-convert and inphase/quadrature - IQ - demodulate a received analog radio frequency signal, received by the at least one antenna (202,302), to provide a received analog baseband signal and to IQ-modulate and up-convert a transmit analog baseband signal, to be transmitted by the at least one antenna (202, 302), to provide a transmit analog radio frequency signal, The mixer (204a,204b,304a,304b) further comprises at least one input terminal (201a, 301a) connected to an input terminal of the interface for acquiring the transmit analog baseband signal and at least one output terminal (201b,301b) connected to an output terminal of the interface for providing the received analog baseband signal, The at least one antenna (202,302) is directly connected to the duplexer (202a,302a), the duplexer (202a,302a) is directly connected to the at least one power amplifier (203a,203b,303a,303b), the at least one power amplifier (203a,203b,303a,303b) is directly connected to the at least one mixer (204a,204b,304a,304b) and the at least one mixer (204a,204b,304a,304b) is directly connected to the interface, The analog processing subsystem is comprised on a single analog radio frequency processing chip (201,301), and The analog radio frequency processing chip (201,301) comprises a metallization on at least one side of the chip and wherein the metallization comprises integration of the at least one antenna (202,302). Moreover, the metallization forms an antenna structure, the antenna structure is adapted to isolate the analog processing subsystem from radiation.