Integrated Mechanical Resonator Layout for Signal Leakage Isolation
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Solution Overview
Problem
Existing electrical devices with signal filters and mechanical resonators face challenges in reducing size and cost while maintaining effective operation, particularly due to interference and leakage issues when integrating these components on a common substrate.
Innovation Solution
The integration of a mechanical resonator for oscillator signals onto the same substrate as a signal filter, with the use of isolation mechanisms such as acoustical decoupling and additional resonators acting as input or output traps to minimize leakage and interference, allowing for independent operation of both components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a mechanical resonator and signal filter are integrated on the same substrate, then device size and cost are reduced, but signal leakage and interference between components increase
Solution Approach 1:
The substrate is divided into separate functional regions: a first region for the signal filter and a second region for the mechanical resonator. This spatial segmentation reduces interference between components while maintaining integration benefits.
Solution Approach 2:
An isolation structure is introduced as an intermediary element between the signal filter and mechanical resonator. This mediator attenuates signal leakage and acoustic interference, enabling close integration without harmful interactions.
2Object-generated harmful factors
If isolation structures are added between components, then signal leakage is reduced, but device complexity increases
Solution Approach 1:
The isolation structure utilizes acoustic isolation techniques with thin film or shell-like configurations that provide effective signal leakage attenuation without adding substantial structural complexity or volume to the device.
3Area of stationary object
If components are placed closer together, then device area is reduced, but acoustic interference between resonators increases
Solution Approach 1:
The acoustic isolation structure serves as a mediator between closely spaced resonators, attenuating acoustic wave propagation between them. This enables compact layout while preventing harmful acoustic interference that would otherwise occur at close distances.
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 a compact electrical device with reduced size and cost, while maintaining low phase noise and improving error vector magnitude for both transmitter and receiver, effectively addressing leakage issues and ensuring proper functionality.
Implementation Method 1
the isolation being configured to attenuate a leakage of a signal from the at least one further mechanical resonator into a signal of the signal filter
Implementation Method 2
at least one further mechanical resonator disposed in the substrate configured to oscillate at a reference frequency of an oscillator signal
Data Source
AI summary
An electrical device (100) that comprises at least one signal filter (104) comprising a plurality of mechanical resonators (106 108, 110) in a substrate (102) and at least one further mechanical resonator (112) in the substrate (102) configured to oscillate at a reference frequency of an oscillator signal. An electrical system (300) comprising an electrical oscillator (306) a transceiver (302) and an antenna (310), and an electrical device (100). A method (1300) for providing an electrical device (100).