Multi-Antenna RF Isolation for Carrier Aggregation
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Solution Overview
Problem
Electronic devices using a single antenna face challenges in managing signal transmission and reception across multiple frequency bands, leading to interference and reduced sensitivity due to the need for duplexer separation, which increases insertion loss and complicates carrier aggregation.
Innovation Solution
The use of multiple antennas allows for physical separation of transmission and reception signals across different frequency bands, eliminating the need for duplexers and enhancing isolation, thereby improving RF performance and supporting carrier aggregation without duplexer insertion loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a single antenna is used to support multiple frequency bands, then device miniaturization is achieved, but signal interference and reduced sensitivity occur due to the need for duplexer separation
Solution Approach 1:
The patent divides the single antenna system into multiple separate antennas, each dedicated to specific frequency bands. This segmentation eliminates the need for duplexers and prevents signal interference between different frequency bands, thereby maintaining signal sensitivity while supporting multi-band operations.
Solution Approach 2:
The patent transitions from a single-antenna architecture to a multi-antenna spatial arrangement, utilizing different spatial dimensions and positions for each antenna. This dimensional change allows simultaneous operation across multiple frequency bands without requiring complex duplexer separation, thus preserving signal quality.
2Adaptability or versatility
If multiple frequency bands are transmitted and received using a single antenna, then carrier aggregation is enabled, but transmission power in one band negatively affects signals in other bands
Solution Approach 1:
The patent assigns different frequency bands to different antennas, creating separate transmission and reception paths for each band. This segmentation prevents transmission power from one band from interfering with signals in other bands, enabling clean carrier aggregation across multiple frequency bands.
Solution Approach 2:
The patent introduces multiple antennas as intermediary elements between the transmitter/receiver and the multiple frequency bands. Each antenna acts as a dedicated interface for specific bands, eliminating direct interference between bands while maintaining carrier aggregation functionality.
3Object-generated harmful factors
If duplexer separation is implemented for multi-band signal management, then frequency band isolation is achieved, but insertion loss increases and device complexity grows
Solution Approach 1:
The patent extracts and removes the duplexer component from the system by dedicating separate antennas to different frequency bands. This elimination of the duplexer reduces insertion loss and simplifies the overall device architecture while maintaining frequency band isolation.
Solution Approach 2:
The patent segments the frequency band management function across multiple antennas instead of using a single antenna with duplexer separation. This segmentation approach achieves frequency isolation more efficiently by avoiding the need for complex duplexer configurations.
Data Source
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AI summary
An electronic device is provided, which includes at least a first antenna and a second antenna and a communication processor configured to transmit at least two signals corresponding to first and second frequency bands through the first antenna and to receive signals corresponding to the first and second frequency bands through the second antenna.