Wireless Antenna Closed Frame Resonance Design
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Solution Overview
Problem
Metal-appearance designed wireless communications terminals face performance deterioration due to user hand interaction, causing frequency offset and call drops, as the metal frame's slit acts as a strong antenna radiation point when handheld.
Innovation Solution
An antenna apparatus with a closed frame, feeding part, and grounding part forming current loops, utilizing metal stubs to redirect strongest radiation to areas seldom touched, eliminating the need for slits and enhancing broadband performance by adjusting impedance through capacitive and inductive elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a slit is introduced in the closed frame to form a loop antenna, then antenna radiation performance is improved, but user hand interaction causes frequency offset and performance deterioration
Solution Approach 1:
The patent extracts the harmful interaction point (the slit) from the closed frame structure. Instead of having the slit as the radiation element, the invention uses a separate feeding part with metal stubs that are electrically connected to the closed frame, thereby removing the vulnerable slit from direct user contact areas while maintaining antenna functionality
Solution Approach 2:
The patent introduces an intermediary feeding structure (feeding part with metal stubs) that mediates between the closed frame and the radiation function. The metal stubs act as intermediaries that redirect the strongest radiation to areas seldom touched by users, decoupling the radiation function from the user-contact frame structure
2Shape
If a closed frame is used without slits for metal appearance design, then appearance quality is improved, but antenna radiation performance deteriorates
Solution Approach 1:
The patent segments the antenna system into distinct functional components: the closed frame serves the appearance and structural function, while the separate feeding part with metal stubs provides the radiation function. This segmentation allows the closed frame to maintain its intact appearance without slits while the feeding part handles radiation independently
Solution Approach 2:
The patent merges the aesthetic closed frame structure with the functional feeding part through electrical connection. The closed frame and feeding part work together as an integrated antenna system, combining the benefits of appearance design (closed frame) and radiation performance (feeding part with metal stubs)
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 solution effectively mitigates antenna performance deterioration caused by human body interaction, maintaining call quality and expanding antenna form to meet broadband requirements without the need for slits, thereby improving user experience.
Implementation Method 1
the closed frame, the feeding part, and the grounding part form a first current loop and a second current loop, where resonance is generated between the first current loop and the second current loop
Data Source
AI summary
An antenna apparatus and a wireless communications device, where the antenna apparatus includes a feeding part, a grounding part, and a closed frame, where the closed frame encircles a main body of the wireless communications device. The feeding part and the grounding part are electrically connected to the closed frame, and the closed frame, the feeding part, and the grounding part form a first current loop and a second current loop, where resonance is generated between the first current loop and the second current loop. There is no need to dispose a slit on the closed frame of the wireless communications device that uses a metal appearance, and a position of the feeding part of a radio frequency feeder is used, to mitigate impact, of a closed environment caused by not disposing the slit on the closed frame, on antenna radiation performance, thereby improving antenna performance and user experience.