Signal Integration Circuit for L1 Band Interference Filtering
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Solution Overview
Problem
The increasing number of antenna elements in electronic devices due to evolving communication technologies affects communication quality, particularly in wireless broadband networks, as existing systems struggle to effectively integrate and filter multiple input signals without interfering with each other's frequency bands.
Innovation Solution
A signal integration circuit with multiple input ports and an output port that selectively filters out overlapping frequency bands from input signals, allowing for the integration of high band, low band, and L1 band signals into a single output signal, reducing the number of input ports required for communication modules without affecting download speed or reception sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antenna elements are added to support evolving communication technologies, then communication functionality and coverage are improved, but communication quality deteriorates due to signal interference and system complexity
Solution Approach 1:
The patent segments the frequency spectrum into distinct bands (high band, low band, L1 band) and processes each band separately through dedicated filtering paths. This segmentation allows multiple communication functions to operate simultaneously without interference, resolving the contradiction between versatility and communication quality by isolating frequency conflicts.
Solution Approach 2:
The patent extracts and removes overlapping frequency components from the low band signal that interfere with L1 band GPS signals. By taking out the harmful overlapping frequencies through filtering, the system maintains both enhanced communication functionality and improved communication quality without mutual interference.
2Reliability
If multiple input ports are used to receive different band signals separately, then signal reception quality is improved, but device complexity increases due to multiple antenna elements and ports
Solution Approach 1:
The patent combines multiple band signals (high band, low band, and L1 band) into a single integrated output signal that can be processed by one communication module. This merging approach maintains signal reception quality for all bands while reducing device complexity by eliminating the need for separate antenna elements and input ports for each band.
Solution Approach 2:
The patent creates a universal signal integration circuit that handles multiple frequency bands (high band, low band, L1 band) through a single integrated architecture. This multi-functional circuit receives and processes all band signals through one input port, reducing the number of antenna elements required while maintaining reception quality across all bands.
3Device complexity
If L1 band signal is integrated with low band signal, then the number of input ports is reduced, but GPS reception sensitivity may be affected by overlapping frequency interference
Solution Approach 1:
The patent extracts and removes the overlapping frequency components from the low band signal that would interfere with L1 band GPS signals. This extraction is performed through dedicated filtering that eliminates harmful frequencies while preserving non-interfering portions of the low band signal, thereby reducing input port requirements without compromising GPS reception sensitivity.
Solution Approach 2:
The patent converts the potentially harmful overlapping frequency interference into a benefit by using the filtering process to selectively remove only the interfering components while preserving useful signal portions. This approach allows signal integration that reduces device complexity while actually improving or maintaining GPS reception sensitivity by eliminating sources of interference.
Data Source
AI summary
An electronic device includes a communication module, an external module and a signal integration circuit. The signal integration circuit includes a first input port, a second input port, a third input port and an output port. The first input port is for inputting an input signal. The second input port is for selectively inputting a first L1 band signal. The third input port is for selectively inputting a second L1 band signal. The output port selectively outputs a first output signal or a second output signal. When the third input port is coupled to an external module, the third input port is for inputting the second L1 band signal, and the output port outputs the second output signal. When the third input port is not coupled to the external module, the second input port is for inputting the first L1 band signal, and the output port outputs the first output signal.