Reconfigurable RF Filter Coupling for Multi-Band Switching Reduction
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Solution Overview
Problem
Current RF communications systems face challenges in achieving flexibility, efficiency, and cost-effectiveness due to the need for complex switching and duplexing components to support multiple wireless communications protocols, which increases size, power consumption, and non-linearity.
Innovation Solution
A reconfigurable RF filter design incorporating a first and second resonator with a coupling circuit, allowing operation in multiple modes with adjustable bandwidth and insertion loss, eliminating the need for front-end RF switching elements by directly coupling tunable RF filter paths to a common connection node.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complex switching and duplexing components are used to support multiple wireless communications protocols, then adaptability is improved, but device complexity increases
Solution Approach 1:
The RF filter is designed to perform multiple functions across different frequency bands and operating modes. By configuring resonators and coupling circuits to operate in various modes (series/parallel resonant modes), a single filter structure supports multiple wireless communication protocols and frequency ranges, eliminating the need for separate filters for each protocol
Solution Approach 2:
The filter incorporates reconfigurable elements that allow dynamic adjustment of its electrical characteristics. Switching mechanisms enable the filter to change its resonant modes and coupling configurations based on the required operating band, providing adaptability without requiring physically different filter structures for each protocol
2Adaptability or versatility
If complex switching and duplexing components are used to support multiple wireless communications protocols, then adaptability is improved, but size increases
Solution Approach 1:
Multiple filter functions are merged into a single integrated RF filter structure. By combining multiple resonators and coupling circuits that can be configured for different operating modes, the design eliminates the need for separate filters, switches, and duplexers, thereby reducing the overall footprint of the RF circuitry
Solution Approach 2:
A single universal filter structure replaces multiple protocol-specific filters and switching components. The filter's ability to be reconfigured for different frequency bands and protocols means that one compact component performs the work of what would traditionally require multiple larger components
3Adaptability or versatility
If complex switching and duplexing components are used to support multiple wireless communications protocols, then adaptability is improved, but power consumption increases
Solution Approach 1:
The design extracts and eliminates the power-hungry switching and duplexing components from the RF signal path. By using a reconfigurable filter that directly selects operating modes through passive or low-power switching mechanisms, the solution removes the need for active switching components that consume significant power, thereby reducing overall power consumption while maintaining multi-protocol support
4Adaptability or versatility
If complex switching and duplexing components are used to support multiple wireless communications protocols, then adaptability is improved, but manufacturing cost increases
Solution Approach 1:
Multiple filter functions are merged into a single integrated RF filter structure. By combining multiple resonators and coupling circuits that can be configured for different operating modes, the design eliminates the need for separate filters, switches, and duplexers, thereby reducing the overall footprint of the RF circuitry
Solution Approach 2:
A single universal filter structure replaces multiple protocol-specific filters and switching components. The filter's ability to be reconfigured for different frequency bands and protocols means that one compact component performs the work of what would traditionally require multiple larger components
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 design enhances flexibility and efficiency by reducing size, cost, and non-linearity while supporting multiple communications bands without the need for complex switching, thereby simplifying RF communications systems.
Implementation Method 1
a first resonator, a second resonator, and a first coupling circuit... During the first operating mode, the reconfigurable RF filter is a bandpass filter having a first bandwidth and a first insertion loss via the first resonator
Data Source
AI summary
A reconfigurable RF filter, which includes a first resonator, a second resonator, and a first coupling circuit, is disclosed. The first coupling circuit is coupled between the first resonator and the second resonator. The reconfigurable RF filter operates in one of a group of operating modes, which include a first operating mode and a second operating mode. During the first operating mode, the reconfigurable RF filter is a bandpass filter having a first bandwidth and a first insertion loss via the first resonator. During the second operating mode, the reconfigurable RF filter is a bandpass filter having a second bandwidth and a second insertion loss via the first resonator, such that the first bandwidth is greater than the second bandwidth and the first insertion loss is less than the second insertion loss.