Antenna Module With Recessed Ground Layer For mmWave Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current antenna modules for mmWave communications face challenges such as signal loss due to high-frequency signal absorption, limited antenna layout space, increased interference, and higher costs, which are not adequately addressed by traditional antenna technologies.
Innovation Solution
The proposed antenna apparatus and module design incorporates a multi-layer ground structure with recessed regions and shielding vias to optimize antenna performance, including a first ground layer with a recessed region, a second ground layer, and a third ground layer surrounding the wiring, which enhances electromagnetic isolation and signal concentration, reducing the size and improving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional antenna module structure with IC and antenna connected by coaxial cable is used, then antenna performance (gain, directivity) can be maintained, but antenna layout space is limited and the size of the antenna module increases
Solution Approach 1:
The patent merges the antenna and IC into a single integrated structure where the antenna pattern is formed on the same substrate as the IC. The ground layer serves dual purposes as both the grounding structure for the antenna and the mounting substrate for the IC, eliminating the need for separate coaxial cable connections and reducing overall module size.
Solution Approach 2:
The patent utilizes vertical layering with multiple ground layers at different heights (first ground layer, second ground layer) to create three-dimensional electromagnetic isolation. This vertical dimension allows the antenna pattern to be positioned above the IC while maintaining electrical isolation through the ground layers, solving the space constraint problem.
2Area of stationary object
If the antenna is integrated with the IC on the same board, then antenna layout space is improved, but interference between the antenna and IC increases
Solution Approach 1:
The patent introduces ground layers as intermediary structures between the antenna pattern and the IC. These ground layers act as electromagnetic shields that block interference between the two components while allowing them to be integrated on the same substrate. The feeding via structure also serves as an intermediary to provide controlled electrical connection.
Solution Approach 2:
The patent creates localized electromagnetic environments by positioning ground layers at specific locations around the antenna pattern and IC. The first ground layer is positioned beneath the antenna pattern while the second ground layer is positioned above the IC, creating localized isolation zones that prevent interference without affecting overall integration.
3Adaptability or versatility
If high-frequency RF signals are transmitted, then mmWave communications capability is achieved, but signal loss increases due to absorption
Solution Approach 1:
The patent performs preliminary electromagnetic field shaping by configuring the ground layers and antenna pattern geometry before signal transmission. The ground layers are positioned to create favorable electromagnetic boundary conditions that minimize signal absorption and maximize radiation efficiency at mmWave frequencies.
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 design improves antenna gain and reduces size by optimizing the distance between ground layers and the antenna pattern, enhancing electromagnetic isolation and signal concentration, thereby addressing the limitations of traditional antenna technologies.
Implementation Method 1
a multi-layer ground structure with recessed regions and shielding vias to optimize antenna performance... enhances electromagnetic isolation and signal concentration
Data Source
AI summary
An antenna apparatus includes: a first ground layer; a second ground layer disposed on a surface of the first ground layer; an antenna pattern spaced apart from the first and second ground layers in a direction of the surface, and configured to transmit and/or receive a radio frequency (RF) signal; and a feed line electrically connected to the antenna pattern and extending from the antenna pattern toward the first ground layer in the direction of the surface, wherein the first ground layer includes a first region recessed, relative to the second ground layer, in the direction of the surface.