Switchable Antenna Module for Multi-Band Coverage in Limited Space
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Solution Overview
Problem
The miniaturization of antenna structures in electronic devices leads to a substantial decrease in bandwidth, making it challenging to design an antenna that can efficiently transmit and receive multiple frequency bands within the limited internal space.
Innovation Solution
An antenna module with a switching circuit that allows the first radiating portion and third radiating portion to generate different frequency bands by switching between modes, enabling the module to cover multiple frequency bands while maintaining antenna efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna structure is miniaturized to fit limited internal space, then the device can be made thinner and lighter, but the bandwidth of the antenna substantially decreases
Solution Approach 1:
The patent applies dynamics by using a switching circuit to dynamically reconfigure the antenna structure between different operating modes. The switching circuit connects different radiating portions to the feeding element based on the desired frequency band, allowing the antenna to adapt its electrical characteristics in real-time. This dynamic reconfiguration enables a compact physical structure to achieve multiple frequency bands with sufficient bandwidth by activating different radiating portions as needed.
Solution Approach 2:
The patent implements multi-functionality by designing a single antenna structure that can operate across multiple frequency bands (including 700MHz, 900MHz, 1800MHz, and 2600MHz bands) through the switching circuit. The same radiating portions and feeding elements serve multiple functions by being selectively connected to different frequency bands, eliminating the need for separate antennas for each band and thereby maintaining compact size while achieving universal frequency coverage.
2Volume of moving object
If the antenna structure is miniaturized, then the device internal space is better utilized, but the antenna efficiency for transmitting and receiving multiple frequency bands deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the antenna into multiple radiating portions (first, second, third, and fourth radiating portions) that can be independently connected to the feeding element through the switching circuit. Each radiating portion is optimized for specific frequency bands, allowing the compact antenna structure to maintain high efficiency across multiple bands by activating only the necessary segments for each operating frequency, thereby preventing energy loss and maintaining reliable transmission and reception.
3Device complexity
If a single antenna structure is used to cover multiple frequency bands, then the device complexity is reduced, but achieving sufficient bandwidth across all bands becomes more difficult
Solution Approach 1:
The patent introduces a switching circuit as an intermediary component between the radiating portions and the feeding element. This switching circuit acts as a mediator that selectively connects different radiating portions to the feeding element based on the desired frequency band. The intermediary switching circuit enables a single antenna structure to achieve multiple frequency bands with sufficient bandwidth by controlling which radiating portions are active, thereby managing the complexity of multi-frequency operation through a centralized control mechanism.
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
The antenna module effectively covers multiple frequency bands by adjusting the central frequency of the operating bands through the switching circuit, thereby addressing the bandwidth limitations caused by miniaturization.
Implementation Method 1
the first radiating portion and the third radiating portion are used to generate a first operating frequency band. When the switching circuit is switched to the second mode, the first radiating portion and the third radiating portion are used to generate a second operating frequency band
Data Source
AI summary
An antenna module and an electronic device are provided. The antenna module is disposed in a housing of the electronic device. The antenna module includes a first radiating element, a second radiating element, a grounding element, and a switching circuit. The first radiating element includes a first radiating portion and a second radiating portion that are connected with each other. The second radiating element includes a third radiating portion, a fourth radiating portion, a fifth radiating portion, and a feeding portion. The switching circuit is electrically connected between the grounding element and the first radiating element or between the grounding element and the feeding portion.