Dual Antenna Frame Switching for Multi-Band Signal Handling
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Solution Overview
Problem
Existing electronic devices with multiple antennas for different signal types occupy a large area, posing a challenge in design and space efficiency.
Innovation Solution
The antenna system incorporates a switching unit and dual antenna frames with high-pass and low-pass circuits, allowing for the same antenna structure to handle both high-frequency signals (e.g., 2G/3G/4G) and low-frequency signals (e.g., NFC or WPT) by selectively switching between them, optimizing antenna length for signal transmission based on signal type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are used for different signal types, then signal transmission capability is improved, but device area occupied increases
Solution Approach 1:
The patent implements a universal antenna structure that can handle multiple signal types (2G/3G/4G high-frequency signals and NFC/WPT low-frequency signals) through a single antenna frame. The switching unit enables the same antenna to be configured for different frequency ranges, eliminating the need for separate dedicated antennas for each signal type, thus reducing the overall device area while maintaining comprehensive signal transmission capability.
Solution Approach 2:
The patent merges the functions of multiple separate antennas into a single integrated antenna structure. By combining high-pass and low-pass circuits with a unified antenna frame and switching unit, the design consolidates what would traditionally require multiple discrete antenna components into one compact unit, directly addressing the area occupation problem while preserving multi-signal support.
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 enables efficient use of space by allowing a single antenna structure to handle multiple signal types, optimizing antenna length for low-frequency signals and attenuating inappropriate frequencies, thus reducing the overall device size while maintaining effective signal transmission.
Implementation Method 1
a first ground point 211 and a first feed point 212 are respectively located between the two end portions of the first antenna frame 21. A second ground point 213 is located at one end portion of the first antenna frame 21 which is away from the switching unit 23, and the switching unit 23 is located at the other end portion of the first antenna frame 21. The first ground point 211 is grounded via a high-pass circuit 25.
Implementation Method 2
a second feed point 221 and a third ground point 222 are respectively located between the two end portions of the second antenna frame 22, a third feed point 223 is located at one end portion of the second antenna frame 22 which is away from the switching unit 23, and the low-pass circuit 24 is located at the other end portion of the second antenna frame 22.
Data Source
AI summary
An electronic device includes a control module, a first antenna frame, and a second antenna frame. A first ground point, a first feed point, and a second ground point are respectively located on the first antenna frame. A second feed point, a third ground point, and a third feed point are respectively located on the second antenna frame. A switching unit and a low-pass circuit being electrically coupled between one end portion of the first antenna frame and one end portion of the second antenna frame, wherein the switching unit is controlled by the control module to selectively connect the first antenna frame and the second antenna frame. If the switching unit is closed, an antenna element formed between the first ground point and the third feed point is enabled, and the antenna element is operated to receive and/or transmit low frequency signal.