Wireless Dongle Printed Antenna Layout for Stable 2.4 GHz Operation
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Solution Overview
Problem
The challenge is to design a wireless dongle with a compact printed antenna that can operate stably in a limited space while maintaining performance in predetermined frequency bands, aligning with the miniaturization trend of mobile devices and peripherals.
Innovation Solution
The wireless dongle features a circuit board with a printed antenna having a specific layout, including a feed-in section, first and second radiation sections, a grounding section, and a through hole, arranged to form inverted U and L shapes, allowing efficient electromagnetic wave oscillation in the 2.4 GHz to 2.5 GHz band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna size is reduced to meet miniaturization requirements, then the wireless dongle becomes smaller and more portable, but the antenna stability and performance in predetermined frequency bands deteriorates
Solution Approach 1:
The antenna design transitions from a planar structure to a three-dimensional configuration by utilizing both the front and back surfaces of the circuit board. The first radiation section extends on the front surface while the second radiation section extends on the back surface, creating a spatial structure that maintains electrical performance while reducing the overall footprint of the antenna system.
Solution Approach 2:
The antenna is divided into multiple functional sections: a feed-in section, a first radiation section on the front surface, a second radiation section on the back surface, and a grounding section. This segmentation allows each part to be optimized for its specific function while collectively achieving stable performance in the 2.4GHz to 2.5GHz frequency band within a compact form factor.
2Area of stationary object
If the antenna layout is made compact to fit limited space, then the wireless dongle achieves miniaturization, but the electromagnetic wave oscillation performance and signal quality may be compromised
Solution Approach 1:
The antenna utilizes the third dimension (depth/thickness of the circuit board) by extending radiation sections on both the front and back surfaces. This vertical dimensionality allows the antenna to maintain effective radiating length and electromagnetic performance while occupying minimal planar area on the circuit board.
Solution Approach 2:
The antenna employs an asymmetric layout where the first radiation section on the front surface and the second radiation section on the back surface are positioned and dimensioned differently. This asymmetric configuration optimizes the electromagnetic field distribution and signal quality within the constrained compact space, ensuring reliable operation in the 2.4GHz to 2.5GHz band.
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 compact antenna layout enables stable operation in the specified frequency band, supporting the miniaturization of electronic products and ensuring effective wireless communication.
Implementation Method 1
a first radiation section disposed at the first surface of the circuit board, a second radiation section disposed at the second surface of the circuit board
Data Source
AI summary
A wireless dongle includes a circuit board, a connector disposed to a front of the circuit board, a wireless module and a printed antenna. The circuit board has a first front edge, a first rear edge, a first lateral edge, and a second lateral edge opposite to the first lateral edge. The circuit board has a first surface, and a second surface opposite to the first surface. The wireless module is disposed to a middle and one side of the first surface which is adjacent to the first lateral edge. The wireless module is disposed to a middle and one side of the second surface. The printed antenna is disposed at the other side of the first surface and the other side of the second surface which are adjacent to the second lateral edge. The wireless module is electrically connected between the connector and the printed antenna.