Shared RF Filter Switching for Multi-Band Transceiver Space Limits
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Solution Overview
Problem
Conventional electronic devices require multiple radio frequency filters to support various frequency bands, leading to increased space usage and inefficiency, especially for wide band communications like 5G networks, where quarter-wavelength signal paths are unsuitable.
Innovation Solution
The electronic device dynamically couples radio frequency filters to both transmitters and receivers, allowing filters to be shared and combined to filter different frequency bands, reducing the number of filters needed and enabling efficient communication across a wide range of frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radio frequency filters are added to support new frequency bands, then the electronic device can transmit and receive signals over more frequency bands, but the space occupied in the electronic device increases
Solution Approach 1:
The patent applies universality by designing radio frequency filters that can serve multiple frequency bands simultaneously. The filters are configured with multiple passbands, allowing a single filter to handle multiple frequency ranges (e.g., n77, n78, n79 bands) that would traditionally require separate filters. This multi-functional approach enables the electronic device to support more frequency bands while occupying less space.
Solution Approach 2:
The patent merges multiple filter functions into a single integrated filter structure. By combining the filtering capabilities for different frequency bands into one component, the design reduces the total number of filters needed and consolidates the space they would occupy into a smaller, more efficient configuration.
2Reliability
If quarter-wavelength signal paths are used for narrow wavelength ranges, then the signal transmission is effective for specific frequencies, but the signal paths are unsuitable for wider bands of communication frequencies
Solution Approach 1:
The patent applies dynamics by making the signal path length adjustable rather than fixed. The signal path includes variable length sections that can be dynamically configured to different lengths using switching circuitry. This allows the same signal path to be optimized for different frequency bands by adjusting its electrical length, enabling effective signal transmission across wide frequency ranges including 5G bands.
Solution Approach 2:
The patent changes the electrical parameters of the signal path by varying its physical length and impedance characteristics. Different signal path configurations with different lengths are provided to match the wavelength requirements of different frequency bands. This parameter adjustment allows the system to maintain effective signal transmission across narrow and wide frequency ranges.
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 approach reduces the physical size of electronic devices and allows for additional components, while effectively supporting multiple frequency bands without the limitations of traditional quarter-wavelength signal paths.
Implementation Method 1
multiple radio frequency filters, each of which may filter different frequency bands or ranges
Data Source
AI summary
The present disclosure relates to systems and methods for operating transceiver circuitry to transmit or receive signals on various frequency ranges. To do so, a transmitter or a receiver of the transceiver circuitry is selectively coupled to or uncoupled from an antenna of the transceiver circuitry. Additionally, radio frequency filters may be individually or collectively coupled to and/or uncoupled from the antenna to filter different frequencies in the transmitting or receiving signals.