Antenna Package Ground-Via Layout for High-Frequency Signal Loss
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Solution Overview
Problem
Existing antenna designs in image display devices face signal loss and disturbance due to intermediate circuit structures, particularly flexible printed circuit boards, which affect high-frequency communication efficiency and reliability.
Innovation Solution
An antenna package is designed with a circuit board featuring signal transmission wiring, a ground layer, and via structures that contact the ground layer, enhancing signal transmission efficiency and noise absorption, while maintaining uniform dielectric properties and promoting electric field generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an intermediate circuit structure such as FPCB is used to electrically connect the driving integrated circuit chip and the antenna, then the antenna can be fed and controlled, but additional signal loss and signal disturbance occur due to radiation, impedance properties, and contact resistance
Solution Approach 1:
The patent extracts and eliminates the intermediate FPCB structure from the signal path between the antenna and the driving circuit. By directly mounting the integrated circuit chip on the antenna substrate, the design removes the problematic intermediate layer that causes signal loss through radiation, impedance mismatches, and contact resistance, thereby improving signal transmission reliability without the energy losses associated with traditional FPCB connections
Solution Approach 2:
The patent merges the antenna substrate and the integrated circuit chip mounting into a single integrated structure. The circuit board directly supports both the antenna elements and the driving chip without requiring a separate FPCB intermediate layer, combining multiple functions into one unified structure that eliminates the harmful effects of intermediate circuit structures on signal integrity
2Speed
If the driving frequency of the antenna is increased to support high-frequency communication, then communication capability is improved, but signal loss increases
Solution Approach 1:
The patent converts the potential harm of high-frequency operation by eliminating the intermediate FPCB structure that would exacerbate signal loss at these frequencies. By using direct mounting with optimized trace designs and reduced connection paths, the design transforms the high-frequency challenge into an opportunity to achieve better signal integrity through simplified architecture, where the absence of intermediate structures prevents the compounding of losses that would normally occur at higher frequencies
3Reliability
If FPCB wirings or electrode patterns are used to connect the antenna, then electrical connection is achieved, but radiation and impedance properties are disturbed
Solution Approach 1:
The patent extracts and removes the FPCB intermediate layer with its complex wirings and electrode patterns from the antenna system. By directly integrating the driving chip on the antenna substrate, the design eliminates the source of radiation interference and impedance disturbances that FPCB structures introduce, achieving stable radiation and impedance properties without the complexity of intermediate circuit layers
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
The solution improves antenna signal radiation efficiency, reduces signal loss, and increases operational reliability by uniformly maintaining dielectric properties and promoting electric field generation, thus enhancing communication performance in high-frequency bands.
Implementation Method 1
a first via structure formed through the core layer and arranged around the one end portion of the signal transmission wiring to be in contact with the ground layer
Implementation Method 2
a ground layer disposed on an opposite surface facing the one surface of the core layer
Data Source
AI summary
An antenna package according to an embodiment includes an antenna unit, and a circuit board electrically connected to the antenna unit. The circuit board may include a core layer, a signal transmission wiring disposed on one surface of the core layer, the signal transmission wiring having one end portion connected to the antenna unit, a ground layer disposed on an opposite surface facing the one surface of the core layer, and a first via structure formed through the core layer and arranged around the one end portion of the signal transmission wiring to be in contact with the ground layer.