Signal Booster with Multiband Filters for Adjacent Bands
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Solution Overview
Problem
Current signal boosters for wireless communication face challenges in effectively amplifying and filtering signals across multiple frequency bands, leading to inconsistent network performance and potential network overload, especially in environments with spectrally adjacent bands.
Innovation Solution
The development of a signal booster system that includes triplexers and multiband filters to amplify and filter uplink and downlink signals across multiple frequency bands, including spectrally adjacent bands, with a controller to adjust gain and noise power based on received signal strength indications, ensuring network protection and mitigating near-far problems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a signal booster amplifies signals across multiple frequency bands using conventional methods, then signal coverage is improved, but network overload and inconsistent performance occur in environments with spectrally adjacent bands
Solution Approach 1:
The signal booster divides the amplification process into separate signal paths for different frequency bands (first uplink signal path for first uplink band, second uplink signal path for second uplink band). Each signal path includes its own amplifier and band pass filter, allowing independent control and prevention of cross-band interference that causes network overload.
Solution Approach 2:
Each signal path is optimized with specific band pass filters tuned to particular frequency bands (first band pass filter for first uplink band, second band pass filter for second uplink band). This local optimization ensures that each path processes only its designated frequency range with appropriate gain, preventing harmful effects on adjacent bands while maintaining reliable performance.
2Reliability
If conventional signal boosters amplify signals without spectrally selective filtering, then signal strength is improved, but adjacent band interference causes network instability
Solution Approach 1:
Band pass filters are integrated into each signal path with center frequencies and bandwidths specifically matched to their designated uplink bands. The first band pass filter is configured for the first uplink band while the second band pass filter is configured for the second uplink band, ensuring that amplification is applied locally to the correct frequency range without affecting adjacent bands.
Solution Approach 2:
The filtering function is segmented into separate band pass filters for each frequency band rather than using a single broad filter. This segmentation allows precise control over which frequencies receive amplification, isolating adjacent bands and preventing interference that would otherwise cause network instability.
3Reliability
If signal boosters use separate amplifiers for each frequency band, then signal quality is improved, but device complexity increases
Solution Approach 1:
The signal booster is divided into distinct signal paths (first uplink signal path, second uplink signal path) with separate amplifiers and filters for each frequency band. This segmentation improves signal quality by preventing cross-band interference, while the modular structure makes the complexity manageable through clear functional separation.
Solution Approach 2:
Each signal path is designed as a universal module that can be configured for different frequency bands by adjusting the band pass filter parameters. This multi-functionality allows the same basic architecture to handle multiple uplink bands, reducing overall system complexity compared to designing entirely separate systems for each band.
Data Source
AI summary
Technology for a repeater is disclosed. The repeater can include a first multiband filter. The repeater can include a second multiband filter. The repeater can include one or more first-direction signal paths communicatively coupled between the first multiband filter and the second multi-band filter. At least one of the one or more first-direction signal paths can be configured to amplify and filter signals in two or more spectrally adjacent bands. The repeater can include one or more second-direction signal paths communicatively coupled between the first multiband filter and the second multi-band filter. At least one of the one or more second-direction signal paths can be configured to amplify and filter signals in two or more spectrally adjacent bands.