Configurable RF Front-End With Tunable Frequency Conversion
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Solution Overview
Problem
Current wireless communication systems inefficiently utilize private radio frequency spectrum due to the lack of wireless equipment capable of operating across a wide range of frequency bands, limiting their operational flexibility and effectiveness.
Innovation Solution
A multi-channel, multi-band RF front-end system with tunable wideband frequency converters and a control module that configures local oscillators to enable operation across a wide frequency spectrum, allowing conventional devices to transmit and receive signals within a broader frequency range, including public and private licensed bands, using superheterodyne frequency conversion and signal filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional wireless devices operate only on public frequency bands, then device compatibility and ease of manufacture are improved, but frequency spectrum utilization efficiency deteriorates
Solution Approach 1:
The RF front-end system is designed to perform multiple functions: it can operate on public frequency bands for compatibility with conventional devices, while simultaneously supporting private licensed frequency bands through wideband frequency conversion capabilities, thus making a single device universally applicable across multiple frequency domains
Solution Approach 2:
The system employs tunable wideband frequency converters with adjustable local oscillators that can change operating parameters (frequency conversion ratios, LO frequencies) dynamically, allowing the same hardware to adapt to different frequency bands and resolve the contradiction between fixed manufacturing and flexible operation
2Device complexity
If wireless equipment is designed for limited frequency bands, then device complexity is reduced, but adaptability to different frequency bands deteriorates
Solution Approach 1:
Wideband frequency converters serve as intermediary components between the conventional narrowband wireless device and the wide frequency spectrum, enabling the device to access multiple frequency bands without requiring complex multi-band hardware architecture
Solution Approach 2:
The system incorporates tunable and configurable frequency converters with dynamically adjustable local oscillators controlled by a monitoring and control module, allowing the device to adapt its frequency conversion parameters in real-time based on the desired operating band, thus achieving high adaptability without permanent complex hardware
3Ease of operation
If private radio frequency spectrum is not utilized, then regulatory compliance and ease of operation are improved, but communication effectiveness deteriorates
Solution Approach 1:
The frequency spectrum is segmented into different operational modes: the system can operate on public unlicensed bands for regulatory compliance and ease of operation, or switch to private licensed bands for enhanced communication effectiveness, with the control module managing the segmentation and selection of appropriate frequency segments
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
Enables efficient utilization of a wide range of available frequency bands, enhancing the operational flexibility and effectiveness of wireless communication systems by allowing conventional devices to operate across a broader spectrum, including public and private licensed frequencies.
Implementation Method 1
signals from the control module are used in conjunction with a frequency synthesizer to 'tune' the local oscillator (LO) frequency selections associated with each channel
Implementation Method 2
Both the transmit and receive sections use superheterodyne frequency conversion to provide the translation between the limited frequency band associated with conventional wireless devices and wide frequency band
Implementation Method 3
An RF front-end system is formed to include tunable, wideband frequency converters within the transmit and receive sections of each channel, allowing for conventional, limited-bandwidth wireless devices to transmit and receive a broad range of frequencies
Data Source
AI summary
An RF front-end system is formed to include tunable frequency converters within the transmit and receive sections of each channel, allowing for conventional, limited-bandwidth wireless devices to transmit and receive a broad range of frequencies. Both the transmit and receive sections use superheterodyne frequency conversion to provide the translation between the limited frequency band associated with conventional wireless devices and wide frequency band (e.g., between about 100 MHz and 7000 MHz) approved for wireless communication. By virtue of using a local oscillator that can be widely tuned over the complete available frequency spectrum, the up-converted signals used for transmission can be expanded over this wider frequency selection.