MEMS Actuator Signal Path Impedance Tuning
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Solution Overview
Problem
Existing RF systems in space-constrained environments, such as millimeter wave seekers, face challenges in dynamically tuning broadband and frequency-agile waveforms due to limitations in altering impedance and structural changes in signal paths.
Innovation Solution
The method involves establishing an RF response in a signal path and using a MEMS actuator to structurally alter the path, dynamically changing impedance to modify the RF response, employing CMOS processing and conductive segments that can move within a dielectric to adjust coupling coefficients and electrical parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If switched banks of RF devices are used to support broadband and frequency agile waveforms, then the RF response can be modified, but the device size and complexity increase
Solution Approach 1:
The patent employs dynamically tunable devices that can change their electrical characteristics in real-time, allowing a single device to perform multiple RF functions. The movable conductive segments can be positioned at different locations within the dielectric to dynamically adjust coupling coefficients and modify RF response, replacing the need for multiple fixed RF devices
Solution Approach 2:
The signal path structure is designed to perform multiple RF functions through a single integrated device. By moving conductive segments within the dielectric, the same physical structure can adjust coupling coefficients, modify impedance, and adapt RF response across different frequency ranges, making the device universal for broadband and frequency-agile applications
2Adaptability or versatility
If the signal path is structurally altered to dynamically change impedance, then the RF response can be modified, but the manufacturing complexity increases
Solution Approach 1:
The signal path is divided into segmented conductive structures separated by dielectric material. These segments can be independently positioned and controlled, allowing precise impedance tuning. The segmentation enables modular manufacturing where segments can be fabricated and then assembled or positioned using standard CMOS and post-CMOS processing techniques
Solution Approach 2:
The patent changes physical parameters of the signal path by moving conductive segments to different positions within the dielectric. This movement alters coupling coefficients and impedance characteristics without requiring complex manufacturing processes. The same physical structure achieves parameter changes through reconfiguration rather than manufacturing different 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 approach enables dynamic modification of RF responses, enhancing performance by reducing size and cost, and applying to various applications like missile seekers and communications systems, with empirical measurement of transfer functions for desired outcomes.
Implementation Method 1
controlling an actuator to structurally alter the signal path and dynamically change an impedance of the signal path
Implementation Method 2
employing CMOS processing and conductive segments that can move within a dielectric to adjust coupling coefficients and electrical parameters
Data Source
AI summary
The present invention is directed to a method, and associated apparatus, for modifying a radio frequency (RF) response. An exemplary method includes establishing an RF response in a signal path of a device; and controlling an actuator to structurally alter the signal path and dynamically change an impedance of the signal path to alter the RF response.