Multilayer Substrate Layout for Antenna Tuning Without Reauth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to adjust antenna characteristics of small wireless modules without compromising the validity of pre-obtained wireless authentication, as these characteristics can be affected by the substrate material and mounting location, requiring modifications that invalidate the authentication.
Innovation Solution
A multilayer substrate with a first dielectric layer and a conductive layer, featuring auxiliary conductors and connecting pads that allow for selective connection to adjust impedance characteristics without modifying the wireless module, thereby allowing antenna characteristics to be adjusted post-mounting without affecting authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless module is mounted on a substrate, then the wireless module can be used for wireless communication, but the antenna characteristics may be affected by the substrate material and thickness, requiring modification of the wireless module which invalidates the wireless authentication
Solution Approach 1:
The invention divides the antenna system into two independent parts: the wireless module containing the antenna (which remains unmodified to preserve authentication) and the substrate containing adjustable conductor portions (which are modified to adjust characteristics). This segmentation allows the substrate to compensate for antenna characteristic changes without requiring modification of the authenticated wireless module.
Solution Approach 2:
The substrate acts as an intermediary element between the wireless module and the external environment. By providing adjustable conductor portions on the substrate, the invention creates a mediator that can modify the electromagnetic environment around the antenna, thereby adjusting antenna characteristics without touching the authenticated wireless module itself.
2Ease of operation
If modifications are made to the wireless module to adjust antenna characteristics, then the antenna characteristics can be optimized, but the wireless authentication becomes invalid
Solution Approach 1:
Instead of modifying the wireless module to adjust antenna characteristics (the conventional approach), the invention inverts the approach by modifying the substrate on which the wireless module is mounted. The conductor portions on the substrate are adjusted to achieve the desired antenna characteristics, while the wireless module itself remains completely unmodified, preserving its authentication validity.
3Adaptability or versatility
If the conductor portion is disposed close to the antenna, then the adjustment effect on antenna characteristics is more significant, but the area occupied by the conductor portion increases
Solution Approach 1:
The conductor portions are strategically positioned in specific local regions on the substrate near the wireless module, rather than being uniformly distributed across the entire substrate. This localized placement allows the conductor portions to exert their maximum influence on the antenna characteristics while occupying minimal substrate area, achieving high adjustment capability with small area occupation.
Data Source
AI summary
A multilayer substrate includes a first dielectric layer, a first conductive layer, and a conductor portion. The first dielectric layer has a first region. The first conductive layer is laminated on the first dielectric layer, excluding the first region. The conductor portion has one or more auxiliary conductors disposed at a distance from the first conductive layer, and one or more connecting conductors that connect said one or more auxiliary conductors to the first conductive layer.