Flexible Antenna Layout for Slim Devices With Lower Interference
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Solution Overview
Problem
As electronic devices become thinner, the increasing proximity of multiple antennas can lead to mutual interference, deteriorating their radiation performance.
Innovation Solution
The use of a flexible substrate with a specific configuration, including a first connecting portion, an interconnecting portion, and a branch portion, to maintain a sufficient separation distance between antennas, thereby improving radiation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the electronic device is slimmed down by reducing thickness, then the device becomes thinner and more compact, but the separation distance between adjacent antennas decreases leading to mutual interference and deteriorated radiation performance
Solution Approach 1:
The patent transitions antenna arrangement from a two-dimensional planar layout to a three-dimensional spatial configuration by extending antennas in the thickness direction. The first antenna is disposed at a first position in the thickness direction and the second antenna at a second position, creating vertical separation that maintains adequate distance between antennas while preserving a slim device profile.
Solution Approach 2:
The patent nests multiple antenna structures within the limited thickness space of the device. By positioning antennas at different heights along the thickness direction and using flexible substrates that can be folded or bent, the design effectively packs multiple radiation elements into a compact volume without significant mutual interference.
2Area of stationary object
If multiple antennas are disposed in the same mounting space, then the device maintains a compact form factor, but mutual interference between antennas deteriorates radiation performance
Solution Approach 1:
The patent utilizes the thickness direction as an additional spatial dimension to separate antennas. Instead of arranging antennas side-by-side in the planar area, the first and second antennas are positioned at different heights along the thickness direction, effectively using vertical space to reduce mutual interference while maintaining compact footprint.
Solution Approach 2:
The patent segments the antenna system into spatially separated components by dividing the mounting space into distinct vertical zones. The first antenna structure occupies one height region while the second antenna occupies another, with flexible substrates and support structures creating physical segmentation that reduces electromagnetic coupling between adjacent antennas.
Data Source
AI summary
In embodiments, an electronic device may include a housing having an inner space, a printed circuit board (PCB) disposed in the inner space of the housing, a first antenna structure disposed at a position spaced apart from the PCB, and transmitting and/or receiving a radio signal in a first frequency band, at least one second antenna structure disposed at a position spaced apart from the PCB, and transmitting and/or receiving a radio signal in a second frequency band different from the first frequency band, and a flexible substrate electrically connecting the PCB and the first antenna structure. The flexible substrate may include a first connecting portion electrically connected to the PCB, an interconnecting portion extended from the first connecting portion to the first antenna structure, at least one branch portion branched from at least a part of the interconnecting portion, and extended to the at least one second antenna structure, at least one first conductive path disposed in the interconnecting portion, and electrically connecting the first connecting portion and the first antenna structure, and at least one second conductive path disposed in the interconnecting portion and the at least one branch portion, and electrically connecting the first connecting portion and the at least one second antenna structure.