Wiring Base Ground Grid Layout for High-Frequency Impedance Control
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Solution Overview
Problem
Existing wiring bases face challenges in efficiently transmitting high-frequency signals due to impedance mismatch and resonance issues, particularly in microstrip lines, where the distance between signal and ground conductors affects transmission characteristics.
Innovation Solution
The wiring base incorporates a terminal member with a ground conductor featuring a mesh pattern of openings in two layers, strategically positioned to maintain resonant frequency and adjust impedance, ensuring effective transmission of high-frequency signals by stabilizing the ground potential and reducing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the ground conductor is positioned close to the signal conductor to reduce impedance, then impedance control is improved, but resonance issues and transmission characteristics deteriorate
Solution Approach 1:
The ground conductor is divided into a grid pattern with multiple segments separated by openings. This segmentation allows the ground conductor to provide multiple localized reference planes for the signal conductor, enabling better impedance control while preventing resonance through distributed grounding points rather than a continuous ground plane.
Solution Approach 2:
The ground conductor structure transitions from a uniform continuous plane to a non-uniform grid pattern with varying opening sizes and distributions. This local quality variation allows different regions to serve different functions: areas with smaller openings provide stronger grounding for impedance control, while areas with larger openings reduce capacitive coupling to prevent resonance.
2Stability of the object's composition
If a continuous ground conductor is used to maintain ground potential, then ground stability is improved, but electromagnetic interference and resonance increase
Solution Approach 1:
The continuous ground conductor is segmented into a grid pattern with multiple isolated conductive regions. Each grid cell acts as an independent grounding zone that maintains local ground potential stability while the distributed structure reduces electromagnetic interference by preventing large-area resonant modes that occur with continuous ground planes.
Solution Approach 2:
The openings in the ground conductor act as intermediaries that decouple adjacent ground regions electrically. These openings prevent direct current paths between neighboring ground areas, reducing ground loops and electromagnetic interference, while the grid structure maintains sufficient grounding density to preserve ground potential stability.
3Ease of manufacture
If the ground conductor is placed at standard distance from signal conductor, then manufacturing simplicity is maintained, but transmission loss increases
Solution Approach 1:
The invention changes the geometric parameters of the ground conductor from a continuous plane to a grid pattern with specific opening dimensions (width and length). By optimizing these parameters, the effective electrical distance between signal and ground is modified, reducing transmission loss through improved field distribution while maintaining compatibility with standard manufacturing processes for PCB or substrate fabrication.
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 configuration enhances transmission characteristics by maintaining resonant frequency and reducing impedance, resulting in improved reflection loss and insertion loss across high-frequency bands, specifically in the 55 GHz to 85 GHz range.
Implementation Method 1
stabilizing the ground potential and reducing electromagnetic interference
Implementation Method 2
maintain resonant frequency
Implementation Method 3
adjust impedance
Data Source
AI summary
A wiring base includes a base, a signal conductor, and a ground conductor including a first ground conductor. The base includes a first surface, a first region, and a second region. The first region is located near an outer side of the first surface. An external board is mounted in the first region. The second region is other than the first region. The signal conductor extends through a region including the first region of the first surface in a first direction away from the outer side. The first ground conductor is located in the base at a distance from the signal conductor of less than ¼ of a wavelength of a high-frequency signal. The high-frequency signal is transmitted through the signal conductor. The first ground conductor includes a first grid portion at a first location overlapping the first region and at least a portion of the signal conductor.