Shared-Feed Inverted-F Antenna Assembly for Overlapping Bands
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Solution Overview
Problem
The increasing number of electronic components in devices like smartphones limits the space available for antennas, reducing their efficiency in receiving and transmitting electromagnetic waves, especially in 5G devices with full-screen configurations.
Innovation Solution
The antenna assembly includes a first and second antenna element, each comprising a radiator, a ground branch, and a signal source, forming inverted-F antennas that share a signal source to transmit/receive electromagnetic waves across overlapping target bands, improving radiation efficiency without requiring additional components or space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of electronic components is increased to provide more functions, then the functionality of the electronic device is improved, but the space reserved for the antenna is reduced
Solution Approach 1:
The patent combines two inverted-F antennas into a single integrated structure where the first and second radiating branches share a common feed point and ground connection. This merging allows both antennas to coexist in a compact form factor, enabling multi-band communication functionality while minimizing the space occupied by the antenna assembly.
Solution Approach 2:
The integrated antenna structure is designed to support multiple frequency bands simultaneously through its dual radiating branches. The first radiating branch targets a first frequency band while the second radiating branch targets a second frequency band, allowing a single antenna assembly to perform multiple communication functions that would traditionally require separate antennas.
2Volume of moving object
If the antenna space is reduced to accommodate more components, then the portability of the electronic device is improved, but the antenna efficiency is reduced
Solution Approach 1:
The patent utilizes the ground branch extending in a direction substantially perpendicular to the radiating branches to create a three-dimensional inverted-F structure. This dimensional approach allows the antenna to achieve resonant lengths suitable for efficient radiation while maintaining a compact footprint on the circuit board, effectively transitioning from a two-dimensional layout to a three-dimensional structure that preserves antenna performance in reduced space.
Solution Approach 2:
The patent optimizes the electrical parameters of the antenna structure, including the lengths of the radiating branches, the position of the feed point, and the configuration of the ground branch, to achieve resonant frequencies that match the target frequency bands. By carefully adjusting these parameters, the antenna maintains high radiation efficiency despite the reduced physical dimensions required for compact device integration.
3Device complexity
If a single antenna structure is used to cover multiple bands, then the device complexity is reduced, but the bandwidth coverage requirement becomes more challenging
Solution Approach 1:
The patent divides the antenna structure into distinct radiating branches, with each branch optimized for a specific frequency band. The first radiating branch is designed for the first frequency band while the second radiating branch is designed for the second frequency band. This segmentation allows each branch to be independently optimized for its target band while maintaining a unified integrated structure, simplifying the overall device architecture compared to using multiple separate antennas.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances antenna efficiency by allowing the antenna to cover multiple bands with reduced size, improving radiation performance and supporting a wide bandwidth without the need for additional components or increased space, thus addressing the challenge of limited space in modern electronic devices.
Implementation Method 1
The first sub-antenna is configured to transmit/receive electromagnetic wave signals of a first target band under excitation of the first signal source. The second sub-antenna is configured to transmit/receive electromagnetic wave signals of a second target band under excitation of the first signal source.
Data Source
AI summary
An antenna assembly and an electronic device are provided. A first antenna element includes a first radiator, a ground branch, and a first signal source. A joint of a first radiating branch and a second radiating branch is a first feed point. The first signal source is electrically connected to the first feed point. The ground branch, the first signal source, and the first radiating branch form a first sub-antenna. The ground branch, the first signal source, and the second radiating branch form a second sub-antenna. The first sub-antenna is configured to transmit/receive electromagnetic wave signals of a first target band under excitation of the first signal source. The second sub-antenna is configured to transmit/receive electromagnetic wave signals of a second target band under excitation of the first signal source. The first target band at least partially overlaps with the second target band.