Antenna Ground Path Segmentation for Interference Mitigation
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Solution Overview
Problem
In portable electronic devices, the presence of electric and circuit objects encroaches on the antenna's radiation region, causing distortion and malfunction due to interference, particularly with the connector structure at the lower end, which complicates resonance tuning and miniaturization.
Innovation Solution
An antenna device with a radiator and a ground portion connected to an expanded ground path that forms a new current path, allowing current to flow smoothly and preventing dispersion, while adjusting the ground path length using lumped elements like inductors or capacitors to control impedance and tune resonance frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a connector structure is equipped at the lower end of the smart phone, then user convenience and design are improved, but the antenna radiation region is blocked and malfunction occurs due to interference from electric objects or circuit objects
Solution Approach 1:
The ground portion is divided into a first ground portion and a second ground portion positioned at different locations. This segmentation allows the antenna system to maintain proper ground references while avoiding interference from the connector structure, thus preserving antenna reliability without compromising user convenience features.
Solution Approach 2:
A feed line is introduced as an intermediary element to connect the radiator to the ground portions. This feed line structure enables the antenna to function properly by providing an alternative current path that avoids direct interference from the connector structure, maintaining antenna performance while allowing the connector to remain in place for user convenience.
2Adaptability or versatility
If various electric objects, circuit objects, and/or the like encroach a basic radiation region of the antenna, then device functionality is improved, but antenna characteristic distortion and malfunction occur
Solution Approach 1:
The ground system is segmented into multiple ground portions located at different positions around the radiator. This segmentation enables the antenna to maintain its radiation characteristics even when other device components encroach on the traditional ground area, allowing versatile device functionality without antenna distortion.
Solution Approach 2:
The patent utilizes spatial distribution by positioning ground portions at different locations rather than relying on a single continuous ground plane. This dimensional approach allows the antenna to maintain proper grounding and radiation patterns despite encroachment from other device components, preserving antenna characteristics while enabling comprehensive device functionality.
3Adaptability or versatility
If a PIFA antenna is used to support various wireless communication functions, then communication capability is improved, but the space occupied by the antennas becomes larger making compact size difficult
Solution Approach 1:
The ground portion is divided into multiple segments positioned at different locations, which allows the antenna structure to be more compact. This segmentation enables the PIFA to maintain its resonant characteristics and support multiple wireless communication functions while occupying less space, as the distributed ground portions allow for more efficient use of the available volume.
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
Prevents antenna characteristic distortion, allows for miniaturization, and facilitates easy resonance frequency tuning without additional elements, improving antenna performance and space efficiency.
Implementation Method 1
a radiator (120) configured to transmit/receive an electromagnetic wave
Implementation Method 2
a ground path (200) extending from the ground portion (110) to a region adjacent to the expanded ground (140) so as to cause current to flow from the ground portion (110) through a current path corresponding to the length of the radiator (120)
Implementation Method 3
the ground portion (110) configured to conduct current such that a current corresponding to an opposite polarity of a current, which flows in the radiator (120), flows in the ground portion (110)
Data Source
AI summary
An electronic device with an antenna device is provided. The electronic device include a radiator configured to transmit/receive an electromagnetic wave, a ground portion connected to one end of the radiator, the ground portion configured to conduct current such that a current corresponding to an opposite polarity of a current, which flows in the radiator, flowing in the ground portion, an expanded ground extending from a part of the ground portion, and a ground path extending from the ground portion to a region adjacent to the expanded ground so as to cause current to flow from the ground portion through a current path corresponding to the length of the radiator.