Battery-Overlap Antenna Layout in a Non-Metal Middle Frame
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Solution Overview
Problem
Electronic devices with metal appearances have low antenna radio frequency performance due to the lack of antennas inside, particularly in the battery area, limiting the deployment area and affecting performance.
Innovation Solution
Deploy antennas in the battery area by using a non-metal middle frame with a connection plate, allowing antennas to overlap the battery projection, and maintain a minimum clearance to enhance deployment area and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antennas are deployed only in side frames, then the device structure is simple, but the antenna deployment area is limited and radio frequency performance is poor
Solution Approach 1:
The patent transitions antenna deployment from a two-dimensional side frame layout to a three-dimensional configuration by placing antennas within the battery area along the thickness direction. This allows the antenna projection to overlap with the battery while maintaining physical separation through vertical positioning, effectively utilizing the Z-dimension to expand deployment space.
Solution Approach 2:
The antenna is nested within the battery area by positioning it in the middle frame's connection plate region, where the antenna projection overlaps with the battery projection when viewed from the back cover. This nested arrangement allows the antenna to occupy space within the existing battery footprint without requiring additional external area.
2Area of stationary object
If antennas are placed close to the battery to expand deployment area, then antenna deployment area increases, but electromagnetic interference with the battery may occur
Solution Approach 1:
The non-metal middle frame connection plate serves as an intermediary structure between the antenna and the battery. The connection plate provides a mounting surface for the antenna while maintaining a physical barrier that reduces direct electromagnetic coupling with the battery, thus mediating the interaction between these two components.
Solution Approach 2:
The patent extracts the antenna from traditional side frame locations and relocates it to the middle frame connection plate area. This extraction allows the antenna to be positioned in a new spatial relationship with the battery, enabling overlap in the projection plane while maintaining physical separation through vertical positioning and intermediate structures.
3Strength
If a metal middle frame is used for structural strength, then device strength increases, but antenna radio frequency performance deteriorates due to metal interference
Solution Approach 1:
The middle frame is constructed as a composite structure combining metal side frames for structural strength and a non-metal connection plate for antenna deployment. This composite design allows different parts of the same structural component to serve different functions: the metal side frames provide mechanical strength while the non-metal connection plate enables optimal antenna performance without electromagnetic interference.
Solution Approach 2:
The middle frame is segmented into distinct functional zones: metal side frames for structural support and a non-metal connection plate for antenna mounting. This segmentation allows each segment to be optimized for its specific function, with the non-metal connection plate specifically designed to support antenna deployment while minimizing electromagnetic interference.
Data Source
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Figure 6(a)~6(d)
AI summary
This application provides an electronic device, including a display, a middle frame, a back cover, a battery, and a first antenna. The middle frame is located between the display and the back cover, the middle frame includes a connection plate and a side frame disposed around the connection plate, the connection plate is provided with a battery compartment, the battery compartment is configured for placement of the battery, and an opening of the battery compartment faces the display. The first antenna is located between the connection plate and the back cover, a projection of the first antenna on the back cover along a first direction at least partially overlaps a projection of the battery on the back cover along the first direction, and the first direction is a thickness direction of the electronic device. In this application, considering that a range of an area of the battery is large, disposing an antenna in the area of the battery can increase a deployment area of the antenna, thereby improving antenna radio frequency performance of the electronic device.