Metal Frame Antenna with Segmented Gaps for Mobile Terminals
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Solution Overview
Problem
The challenge is to enhance antenna utilization and communication performance in mobile terminal devices with metal housings and frames, which typically shield electromagnetic waves, leading to reduced communication efficiency and low antenna utilization due to limited space and interference between antennas.
Innovation Solution
A multiple-input multiple-output metal frame antenna is designed with N feeding branch circuits and N+1 gaps on the metal frame, where metal radiating elements are connected to both feeding branch circuits and grounding parts, forming multiple independent antennas with specific location relationships to ensure high isolation and improved communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal housing and metal frame are used for the terminal device, then the appearance is fashionable and durability is improved, but the metal structure shields electromagnetic waves transmitted or received by the antenna, causing communication performance to deteriorate and antenna utilization to decrease
Solution Approach 1:
The metal frame is segmented by introducing N+1 gaps that divide the continuous metal structure into N separate metal radiating elements. This segmentation allows the metal frame to function both as a structural component and as an antenna system, eliminating the shielding effect while maintaining durability. The gaps create independent radiating elements that can transmit and receive electromagnetic waves without being blocked by the metal housing.
Solution Approach 2:
The metal frame is designed to serve multiple functions simultaneously: it provides structural support and durability as a housing component, while also functioning as an antenna system through the incorporated gaps and radiating elements. This multi-functionality resolves the contradiction by making the metal structure itself the antenna, rather than having separate antenna components that would be shielded by the metal housing.
2Adaptability or versatility
If multiple antennas are configured to cover multiple frequency bands, then wireless communication capabilities are improved, but the net space available for antennas is limited and operating environment becomes worse
Solution Approach 1:
The metal frame structure is designed to serve as a multi-functional component that provides both structural support and antenna functionality for multiple frequency bands. By incorporating N feeding branch circuits that can operate at different frequencies, the single metal frame structure replaces what would traditionally require multiple separate antenna components, thereby maximizing the use of limited space while maintaining comprehensive wireless communication capabilities.
Solution Approach 2:
The patent merges the structural frame with the antenna system by integrating the radiating elements directly into the metal frame. The N metal radiating elements formed by the gaps in the metal frame are connected to N feeding branch circuits, creating a unified structure that combines mechanical support and wireless communication functions, thus eliminating the need for additional antenna space.
3Adaptability or versatility
If multiple antennas are disposed inside the device to achieve multiple frequency bands, then communication versatility is improved, but isolation between adjacent antennas is reduced and interference increases
Solution Approach 1:
The continuous metal frame is segmented into N separate metal radiating elements by introducing N+1 gaps. This segmentation creates physically separated radiating elements that are naturally isolated from each other, reducing mutual interference between antennas operating at different frequency bands. Each radiating element can be independently fed by its own feeding branch circuit, ensuring proper impedance matching and minimizing coupling effects.
4Reliability
If the metal frame is used as an antenna structure, then antenna utilization is improved, but the design space for configuring multiple independent antennas is limited
Solution Approach 1:
The metal frame is designed as a universal structure that simultaneously provides mechanical support and antenna functionality. By incorporating N gaps and N feeding branch circuits, the single metal frame structure can support multiple independent antenna configurations for different frequency bands, achieving high antenna utilization without requiring additional antenna components or complex multi-layer antenna arrangements.
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 improves antenna communication performance, increases utilization, and maintains high isolation between adjacent antennas, effectively addressing the limitations of metal-housed devices by forming multiple independent antennas that do not interfere with each other.
Implementation Method 1
each radiating path has at least one resonance frequency
Data Source
AI summary
A metal frame antenna and a terminal device are provided. The metal frame antenna includes N metal radiating elements between N+1 gaps, an end part of a metal radiating element on at least one of two sides of each of N−1 gaps between the N metal radiating elements is connected to a grounding part, the N metal radiating elements and respectively connected feeding branch circuits and grounding pails form N antennas, and N is an integer not less than 3.