Rear-Housing Antenna Layout for Higher Mobile Radiation Efficiency
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Solution Overview
Problem
Conventional antenna designs for mobile phones face challenges in accommodating increasing numbers of antennas in limited space, leading to reduced radiation efficiency and bandwidth due to the influence of metal components and limited spatial freedom.
Innovation Solution
The use of an insulation rear housing with a printed radiating element on an insulation film layer, which serves as a carrier for the antenna, allowing for increased height and reduced impact from metal components, combined with a coupled electrical connection to the feed and ground, enhances radiation efficiency and bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If conventional antenna designs use support structures like LDS technology or metal bezel as antenna radiator, then the antenna can be integrated into the mobile phone structure, but the antenna height is limited and metal components negatively impact radiation efficiency
Solution Approach 1:
The patent extracts the antenna radiating element from the metal support structure and places it on an insulation film layer attached to the insulation rear housing. This separation removes the harmful influence of metal components on the antenna's radiation performance while maintaining structural integration.
Solution Approach 2:
The patent introduces an insulation film layer as an intermediary carrier between the antenna radiating element and the mobile phone structure. This intermediary layer provides a non-conductive support surface that allows the antenna to achieve greater height without the negative effects of metal components, thereby improving radiation efficiency.
2Quantity of substance
If more antennas are placed in limited space using conventional methods, then antenna quantity increases, but clearance area for radiation is reduced and efficiency decreases
Solution Approach 1:
The patent utilizes the insulation rear housing as a three-dimensional mounting surface for the antenna radiating element. By attaching the antenna to the housing rather than constraining it to the circuit board plane, the design creates additional spatial dimension for radiation clearance, allowing multiple antennas to coexist with sufficient separation.
3Device complexity
If antenna is placed inside mobile phone body using conventional support, then integration is achieved, but the antenna is more liable to be affected by peripheral parts and components
Solution Approach 1:
The patent extracts the antenna radiating element from the interior space near the circuit board and relocates it to the insulation rear housing. This extraction removes the antenna from the harmful electromagnetic environment created by peripheral components while maintaining integrated design through the housing attachment.
Solution Approach 2:
The insulation rear housing serves as an intermediary structure that provides electromagnetic isolation between the antenna and other internal components. The housing material acts as a barrier that reduces interference from peripheral parts while still allowing the antenna to be part of the integrated mobile phone structure.
Data Source
AI summary
A mobile terminal and a mobile terminal antenna production method. The mobile terminal uses an insulation film layer on an insulation rear housing as a carrier of a radiating element of an antenna, and the radiating element is located within the entire mobile terminal. A feed and an electric-conductor are disposed on a circuit board, and the electric-conductor is electrically connected to the feed. There is a gap between the radiating element and the electric-conductor, and the electric-conductor indirectly couples the radiating element in a capacitively coupled manner.