Corner Bracket Slot Antenna with Side Branch for Bandwidth
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Solution Overview
Problem
Incorporating antennas and other electrical components into electronic devices with small form factors is challenging due to limited space and the influence of conductive structures on antenna performance.
Innovation Solution
The use of a slot antenna formed from conductive structures within a housing element, such as a corner bracket, with a side branch slot to enhance bandwidth, and an antenna cavity that also serves as a speaker box to minimize interference with speaker drivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a slot antenna is formed in a corner bracket with limited space, then the device achieves compact form factor, but antenna performance is degraded due to space constraints and conductive structure interference
Solution Approach 1:
The slot antenna is segmented into a main portion and a side branch slot. The main portion provides the primary radiating element while the side branch slot extends laterally to enhance bandwidth. This segmentation allows the antenna to achieve adequate performance within the constrained corner bracket space by dividing the radiating structure into functional segments that work together.
Solution Approach 2:
The corner bracket structure serves multiple functions: it provides mechanical support for the display cover layer, forms the housing structure, and simultaneously serves as the mounting structure for the slot antenna. The antenna cavity is integrated into the same structural elements that provide mechanical support, eliminating the need for separate antenna housings and reducing overall device volume.
2Volume of moving object
If the antenna feed is positioned to overlap the speaker driver, then space is optimized, but interference between antenna and speaker components increases
Solution Approach 1:
The feed structure is specifically positioned and configured at the location where it overlaps with the speaker driver. By optimizing the local geometry and electrical characteristics of the feed in this specific region, the design achieves space efficiency while the particular configuration minimizes harmful interactions between the antenna feed and speaker driver components.
Data Source
AI summary
A display cover layer may be mounted in an electronic device housing using housing structures such as corner brackets. A slot antenna may be formed from a corner bracket opening, metal traces on a hollow plastic support structure, or other conductive structures. The slot antenna may have a main portion with opposing ends. An antenna feed may be located at one of the ends. The slot antenna may have a slot with one or more bends. The bends may provide the slot antenna with a C-shaped outline. A side branch slot may extend from the main portion of the slot at a location between the two bends. The presence of the side branch slot may enhance antenna bandwidth. A hollow enclosure may serve as an antenna support structure and as a speaker box enclosing a speaker driver. The antenna feed may be positioned so as to overlap the speaker driver.