Antenna Element With Split Closed Slot For Metal Substrate
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Solution Overview
Problem
The increasing demand for lightweight, thin, and aesthetically pleasing mobile devices with conductive materials for industrial design poses a challenge in maintaining effective antenna radiation characteristics, as space constraints often lead to reduced performance and increased thickness.
Innovation Solution
A slot antenna element comprising a metal substrate with a first closed slot divided into two sections by a feed part, which excites resonant modes in multiple frequency bands, and matching parts to optimize operating frequencies and bandwidth, allowing for adjustable dimensions to meet specific application requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If metal or conductive material is used for appearance design to achieve lightness and aesthetics, then device attractiveness and industrial design quality are improved, but antenna radiation characteristic is reduced due to insufficient space or clearance zone
Solution Approach 1:
The patent merges the antenna element with the metal appearance structure by forming the antenna element directly on the metal surface, eliminating the need for separate antenna housings or clearance zones. The metal substrate serves dual purposes as both aesthetic covering and antenna mounting platform, resolving the contradiction between appearance quality and radiation performance.
Solution Approach 2:
The patent utilizes the surface dimension of the metal appearance structure to accommodate antenna elements, transitioning from volume-based antenna design to surface-based antenna design. This allows the antenna to be integrated into the metal surface without requiring additional thickness or clearance space, maintaining both aesthetics and radiation characteristics.
2Reliability
If clearance zone is provided for antenna to maintain radiation characteristic, then antenna performance is improved, but device thickness is increased
Solution Approach 1:
The patent employs thin metal substrates and matching structures that can be formed directly on the device surface without requiring thick clearance zones. The antenna elements are designed to operate effectively with minimal substrate thickness, enabling integration into thin-profile devices while maintaining radiation performance.
3Reliability
If antenna space is reserved in internal space of device, then antenna function is achieved, but device weight and thickness are increased
Solution Approach 1:
The patent combines the antenna structure with the metal appearance components, eliminating the need for separate antenna housings and mounting structures. This integration reduces overall device weight by removing redundant structural elements while maintaining full antenna functionality.
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 antenna element achieves efficient operation across multiple frequency bands without requiring additional clearance, maintaining device thinness and aesthetics while enhancing radiation characteristics and heat dissipation.
Implementation Method 1
The feed part is used for exciting the first slot section to generate a resonant mode in a first frequency band and generate a resonant mode in a second frequency band, and exciting the second slot section to generate a resonant mode in a third frequency band
Data Source
AI summary
The disclosure provides an antenna element. The antenna element comprises a metal substrate, a first closed slot, a feed part and a first matching part. The first closed slot is formed in the metal substrate, and comprises a first slot section and a second slot section, wherein the length of the first slot section is greater than the length of the second slot section. The feed part spans across the closed slot, the closed slot is divided into the first slot section and the second slot section by the feed part, the feed part is used for exciting the first slot section to generate a resonant mode in a first frequency band and generate a resonant mode in a second frequency band, and exciting the second slot section to generate a resonant mode in a third frequency band. The first matching part is formed on the first slot section, and is connected to parts of the metal substrate, which are positioned on two sides of the first slot section.