Antenna Unit Parasitic Coupler Interference Reduction
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Solution Overview
Problem
Conventional dual-band antenna units have large physical sizes and signal interference issues due to the proximity of antennas and the presence of a securing member, which affects signal transmission and reception efficiency and causes deformation during assembly.
Innovation Solution
The antenna unit includes left and right antennas spaced apart, with a parasitic coupler electromagnetically coupled between them, operating within different frequency bands to reduce physical size and interference, and is secured to the housing using screws for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If both left and right antennas are placed in close proximity to reduce device size, then the physical size is reduced, but signal interference is generated between the antennas
Solution Approach 1:
A parasitic coupler is introduced as an intermediary element positioned between the left and right antennas. This coupler electromagnetically couples to both antennas and enables them to operate at different frequency bands (2.4 GHz and 5.0 GHz) simultaneously, reducing mutual interference while maintaining compact dimensions. The coupler acts as a mediator that manages the electromagnetic interaction between the closely-spaced antennas.
2Stability of the object's composition
If a securing member is used to fix the grounding plate and antennas, then assembly stability is improved, but the securing member affects signal transmission and reception efficiency
Solution Approach 1:
The invention removes the traditional securing member (screw) that was used to fix the grounding plate and antennas. Instead, the antennas are directly mounted on the upper housing, eliminating the metallic securing member that caused signal interference. This extraction of the harmful securing member improves signal transmission efficiency while maintaining assembly stability through direct mounting.
3Reliability
If the antennas are not secured to the housing, then signal transmission efficiency is improved by removing the securing member, but the antennas are easily deformed during assembly
Solution Approach 1:
The invention merges the mounting function into the housing structure itself. The antennas are directly mounted on the upper housing, combining the structural support function with the antenna mounting function. This eliminates the need for separate securing members while providing adequate mechanical support to prevent deformation during assembly, thus maintaining both signal efficiency and structural integrity.
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 solution results in a compact dual-band antenna unit with improved signal efficiency and stability, achieving omnidirectional radiation patterns and suitable for WLAN and WWAN applications with reduced deformation risks.
Implementation Method 1
a parasitic coupler that is spaced apart from and disposed between the left and right antennas, and that is electromagnetically coupled to the left and right antennas so as to be operable within a second frequency bandwidth different from the first frequency bandwidth
Data Source
AI summary
An antenna unit includes left and right antennas that are spaced apart from each other and that are operable within a first frequency bandwidth, and a parasitic coupler that is spaced apart from and disposed between the left and right antennas, and that is electromagnetically coupled to the left and right antennas so as to be operable within a second frequency bandwidth.