Antenna Ground Conductor Wiring for Foldable Phone Noise Shielding
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Solution Overview
Problem
Communication apparatuses, such as foldable cellular phones, face degradation in receiver sensitivity due to high-frequency noise amplification caused by the resonance of ground wiring when used for high-speed serial transmission, which affects the antenna's resonant frequency and overall performance.
Innovation Solution
Incorporating an antenna ground conductor wiring that forms an electrical loop with the antenna wiring and a capacitor, positioned between the ground conductors of the keyboard and display boards, to reduce the influence of high-frequency noise by creating a resonance that shields the signal wiring, thereby improving receiver sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If ground wiring is used for high-speed serial transmission, then signal transmission capability is improved, but high-frequency noise amplification occurs due to resonance
Solution Approach 1:
The patent introduces a dedicated antenna ground conductor wiring as an intermediary element between the antenna wiring and the ground conductor. This separate ground path acts as a mediator that redirects high-frequency noise current away from the signal transmission path, preventing resonance-induced noise amplification while maintaining effective ground connection for the antenna system.
Solution Approach 2:
The patent segments the ground connection path by creating a dedicated antenna ground conductor wiring separate from the general ground wiring used for signal transmission. This segmentation allows the ground system to handle different frequency components separately - the antenna ground path handles high-frequency noise while the signal ground path maintains stable reference for data transmission.
2Reliability
If ground wiring resonance occurs, then electrical loop is formed, but receiver sensitivity degrades due to noise amplification
Solution Approach 1:
The patent converts the harmful resonance phenomenon into a beneficial shielding effect. By allowing the antenna ground conductor wiring to resonate at high frequencies, it creates an electromagnetic shield that contains and redirects noise current within a controlled loop, preventing this energy from coupling into signal lines and thus protecting receiver sensitivity.
3Stability of the object's composition
If antenna wiring is coupled to ground conductor through capacitor, then antenna resonance is established, but noise coupling to signal wiring occurs
Solution Approach 1:
The antenna ground conductor wiring serves as an intermediary ground path that intercepts high-frequency noise current before it can couple into signal wiring. It provides a low-impedance return path for antenna currents, mediating between the capacitive coupling and the main ground system to prevent noise radiation and coupling to adjacent signal lines.
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 effectively reduces high-frequency noise amplification, enhancing receiver sensitivity and maintaining optimal antenna characteristics across the usable frequency band by redirecting current flow through the antenna ground conductor wiring, thus improving communication equipment performance.
Implementation Method 1
antenna wiring including one end coupled to a feeding unit on the first board and the other end coupled to one end of a capacitor, the other end of the capacitor being coupled to a ground conductor of the second board; and ground conductor wiring for an antenna, disposed between the antenna wiring and the wiring group
Data Source
AI summary
A communication apparatus includes: a wiring group to couple wiring on a first board to wiring on a second board; antenna wiring including one end coupled to a feeding unit on the first board and the other end coupled to one end of a capacitor, the other end of the capacitor being coupled to a ground conductor of the second board; and ground conductor wiring for an antenna, disposed between the antenna wiring and the wiring group, including one end coupled to a ground conductor of the first board and the other end coupled to the ground conductor of the second board.