Inter-Band Carrier Aggregation Circuit With Integrated Duplexers
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Solution Overview
Problem
The existing inter-band carrier aggregation circuits require multiple power amplifiers to operate simultaneously, leading to increased power consumption and layout area due to the use of discrete duplexers and filters, resulting in complex designs with significant insertion loss.
Innovation Solution
An inter-band carrier aggregation circuit that integrates multiple single-frequency-band duplexers or filters into multiplexers, reducing the number of active devices and simplifying the layout by using multiplexers with one transmitting, one receiving, and one antenna end, thereby minimizing power consumption and layout area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple single-frequency-band duplexers or filters are used for inter-band carrier aggregation, then the carrier aggregation function is achieved, but the layout area and device complexity increase significantly
Solution Approach 1:
The patent combines multiple single-frequency-band duplexers or filters into a single integrated multiplexer structure. This merging approach allows the circuit to achieve inter-band carrier aggregation functionality while significantly reducing the layout area and number of discrete devices required, directly resolving the contradiction between functional capability and physical footprint.
2Power
If multiple power amplifiers are operated simultaneously for inter-band carrier aggregation, then the transmission power is sufficient, but the power consumption increases significantly
Solution Approach 1:
The patent implements dynamic switching of power amplifiers based on the required frequency band. Instead of operating multiple power amplifiers simultaneously, the system dynamically selects and activates only the necessary amplifier for the current transmission band, thereby maintaining sufficient transmission power while significantly reducing overall power consumption.
3Reliability
If multiple discrete duplexers and filters are used, then the signal filtering is effective, but the line insertion loss increases
Solution Approach 1:
The patent integrates multiple filtering functions into a single multiplexer structure, reducing the number of discrete duplexer and filter components. This integration minimizes the total line length and number of connection points, thereby reducing cumulative line insertion loss while maintaining effective signal filtering across multiple frequency bands.
4Adaptability or versatility
If multiple discrete devices are used for inter-band carrier aggregation, then the frequency band coverage is comprehensive, but the overall cost increases
Solution Approach 1:
The patent designs a multiplexer structure that performs multiple functions: it acts as both a duplexer and filter across different frequency bands, and enables carrier aggregation functionality. This universal design reduces the number of specialized discrete devices needed, simplifying the overall circuit while maintaining comprehensive frequency band coverage.
Data Source
AI summary
Provided is an inter-band carrier aggregation circuit including a radio frequency transceiver, a power amplifier module, a signal filtering module, an antenna switch and an antenna. The power amplifier module is configured to perform an amplification processing on a carrier aggregation signal output by the radio frequency transceiver to obtain an aggregate amplified signal. The signal filtering module is configured to filter the aggregate amplified signal, the signal filtering module includes at least one multiplexer, the multiplexer is integrated by at least two single-frequency-band duplexers or filters, and the multiplexer includes a transmitting end, a receiving end and an antenna end. By means of the method, the use, layout area, line insertion loss and power consumption of each discrete device in the inter-band carrier aggregation circuit are reduced, and thus the overall cost of the circuit is reduced.