Piezoelectric Package-Integrated Switching for Tunable RF Systems
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Solution Overview
Problem
Current RF communication systems require individual transmit and receive chains for each radio frequency band, leading to increased complexity and cost, and are influenced by environmental factors like antenna detuning, particularly when interacting with the human body.
Innovation Solution
The integration of piezoelectric semiconductor package switches within the substrate of RF systems, allowing for tunable RF circuits that reuse hardware across frequency bands and adjust system performance based on the environment, using movable structures and piezoelectric materials to switch between different paths without adding height or increasing component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual transmit and receive chains are implemented for each radio frequency band, then system performance for each band is optimized, but device complexity and cost increase
Solution Approach 1:
The patent implements a single shared RF chain that can be dynamically reconfigured to operate across multiple frequency bands through piezoelectric-controlled switching mechanisms. This universal approach allows the same hardware to serve multiple functions and frequency ranges, eliminating the need for separate transmit and receive chains for each band, thereby reducing device complexity while maintaining performance through adaptive tuning
Solution Approach 2:
The system employs dynamic reconfiguration capabilities where piezoelectric actuators adjust resonator frequencies and switch between different circuit paths in real-time. This dynamic adaptation allows a single static hardware configuration to perform the work of multiple fixed configurations, resolving the contradiction between optimized performance for each band and overall device complexity
2Reliability
If individual transmit and receive chains are implemented for each radio frequency band, then system performance for each band is optimized, but cost increases
Solution Approach 1:
By designing a universal RF chain that can be tuned across multiple frequency bands through piezoelectric control, the patent reduces the total component count and manufacturing complexity. Instead of producing and assembling separate chains for each band, a single design is manufactured with reconfigurable capabilities, thereby reducing cost while maintaining the ability to achieve optimized performance across bands through software-controlled tuning
3Device complexity
If piezoelectric semiconductor package switches are integrated within the substrate, then component count is reduced and contact resistance is lowered, but manufacturing precision requirements increase
Solution Approach 1:
The patent merges the piezoelectric switching devices directly into the package substrate, integrating multiple functions (switching, tuning, and signal routing) into a single integrated structure. This consolidation reduces component count and interconnection contact resistance by eliminating external connections, while the integration process itself is designed to accommodate standard manufacturing tolerances through careful design of the piezoelectric actuator structures and their connection points
4Device complexity
If hardware is reused across frequency bands, then device complexity is reduced, but adaptability to different frequency bands and environmental conditions must be maintained
Solution Approach 1:
The system incorporates dynamic reconfiguration mechanisms where piezoelectric actuators can adjust resonator frequencies and switch between different circuit configurations in real-time. This dynamic capability allows a single static hardware platform to adapt to different frequency bands and environmental conditions (such as antenna detuning due to human body interaction) through controlled parameter changes, maintaining versatility while using shared hardware
Solution Approach 2:
The patent implements feedback mechanisms that monitor system performance across different frequency bands and environmental conditions, using this information to dynamically adjust piezoelectric actuator positions and switching states. This closed-loop control enables the reused hardware to automatically adapt to varying conditions, maintaining optimal performance across bands without requiring complex manual reconfiguration
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 results in smaller, thinner, and more cost-effective RF systems with lower contact resistance and reduced component count, enabling efficient reconfiguration of RF circuits for multiple frequency bands while minimizing environmental interference.
Implementation Method 1
A piezoelectric material is interposed between the first and second electrodes. The movable structure is mechanically coupled to one of the electrodes. The movable structure is capable of switching from a first position to a second position based on actuation of the piezoelectric switching device
Data Source
AI summary
Embodiments of the invention include a tunable radio frequency (RF) communication module that includes a transmitting component having at least one tunable component and a receiving component having at least one tunable component. The tunable RF communication module includes at least one piezoelectric switching device coupled to at least one of the transmitting and receiving components. The at least one piezoelectric switching device is formed within an organic substrate having organic material and is designed to tune at least one tunable component of the tunable RF communication module.