Antenna Housing Segmentation for Hand Interference
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Solution Overview
Problem
In handheld radio devices, the increasing number of antennas leads to closely packed electronics, causing interference and reducing antenna efficiency, and external conductive elements are prone to being detuned by the user's hand, resulting in dropped calls.
Innovation Solution
The design incorporates a housing with conductive portions electrically isolated by non-conductive gaps, allowing the conductive strip to circumscribe the device with gaps that prevent user interference, ensuring the antenna remains efficient even when the hand bridges the gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external conductive elements are used to improve antenna performance, then antenna efficiency is improved, but the antenna becomes susceptible to user hand interference causing frequency detuning
Solution Approach 1:
The conductive housing is divided into multiple conductive sections separated by non-conductive gaps. This segmentation prevents the user's hand from creating a continuous conductive path across the antenna structure, thereby maintaining antenna efficiency while reducing susceptibility to hand interference.
Solution Approach 2:
Non-conductive gap sections are introduced as intermediary elements between conductive portions of the housing. These gaps act as electrical insulators that block the propagation of interference caused by user hand contact, allowing the antenna to maintain its electrical characteristics.
Data Source
AI summary
A housing defines a face bounded by opposed longitudinal and opposed lateral sidewalls. At least one conductive portion of at least one longitudinal sidewall is electrically isolated from at least one conductive portion of at least one of the lateral sidewalls by at least one corner section that is non-conductive or electrically floating. At least one antenna element internal to the housing is electrically coupled to radio frequency circuitry; and a conductor configured to electrically couple the at least one conductive portion of the at least one lateral sidewall between the opposed longitudinal portions to a ground plane. In a specific embodiment, there are two opposed corner sections each defined by first and second gaps, and the lateral conductive portion between the corner sections parasitically couples to the antenna element when transmitting or receiving. The corner sections may each have a corner conductive portion which are isolated by the gaps.