Notched Ground Element Antenna for Mobile Devices
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Solution Overview
Problem
Metal housing in mobile devices interferes with antenna radiation, limiting their ability to operate effectively across multiple frequency bands.
Innovation Solution
A mobile device antenna structure comprising a substrate, a ground element with a notch forming a slot region, and a radiating branch inside the slot region, coupled to the ground branch, which together form an antenna structure that can operate across multiple frequency bands by exciting both low and high frequency modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal housing is used for durability and aesthetics, then the mobile device structure is improved, but antenna radiation performance deteriorates
Solution Approach 1:
The ground element is segmented by introducing a notch that divides it into separate regions, creating a slot region that allows the radiating branch to be positioned inside. This segmentation enables the antenna structure to function independently from the metal housing, resolving the interference issue while maintaining structural integrity.
Solution Approach 2:
The radiating branch is nested inside the slot region formed by the notched ground element. This nested configuration allows the antenna structure to be compact while maintaining its radiation performance, as the radiating branch operates within the protected slot region that isolates it from the metal housing's harmful effects.
2Ease of manufacture
If a fixed-size metal element is used as antenna main body, then manufacturing is simplified, but multi-frequency band operation capability is limited
Solution Approach 1:
The antenna structure incorporates both low-frequency and high-frequency modes that can be excited depending on the operating conditions. The notched ground element and radiating branch configuration enable dynamic adaptation to different frequency bands, allowing the same physical structure to operate across multiple frequency ranges without requiring separate antenna elements for each band.
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 structure allows the mobile device to operate in multiple frequency bands without significant interference from the metal housing, improving communication quality and reducing design space requirements.
Implementation Method 1
a radiating branch, disposed inside the slot region, and coupled to the ground branch of the ground element, wherein the ground branch and the radiating branch form an antenna structure
Data Source
AI summary
A mobile device includes a substrate, a ground element, and a radiation branch. The ground element includes a ground branch, wherein an edge of the ground element has a notch extending into the interior of the ground element so as to form a slot region, and the ground branch partially surrounds the slot region. The radiation branch is substantially inside the slot region, and is coupled to the ground branch of the ground element. The ground branch and the radiation branch form an antenna structure.