Switchable Parasitic Antenna Module for LTE and Penta Band
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Solution Overview
Problem
Antenna modules for mobile devices face a challenge in simultaneously supporting LTE and Penta band standards without increasing dimensions, leading to a deterioration in transmission effectiveness, particularly for lower frequency bands.
Innovation Solution
The antenna module incorporates a radiator with an extending, bending, and terminal portion, along with a parasitic element and a switch unit, allowing it to switch between two transmission modes to accommodate both LTE and Penta band standards with reduced dimensions by altering the effective current path and impedance matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna module dimensions are increased to support both LTE and Penta band standards, then the transmission effectiveness is improved, but the device size constraint is violated
Solution Approach 1:
The patent employs a switchable parasitic element that can be dynamically connected or disconnected from the ground element through a switching mechanism. This dynamic reconfiguration allows the antenna to adapt its electrical length and impedance characteristics, enabling it to support both LTE and Penta band standards within a compact physical dimensions while maintaining effective transmission performance across different frequency bands
Solution Approach 2:
The patent utilizes impedance transformation through a transformer component to change the electrical parameters of the antenna system. By adjusting the impedance matching through the transformer and the switchable parasitic element, the antenna achieves optimal performance for different frequency bands (LTE and Penta) without requiring increased physical dimensions, thus resolving the contradiction between transmission effectiveness and size constraints
2Length of stationary object
If the antenna module dimensions are decreased to meet device size constraints, then the device compactness is improved, but the transmission effectiveness particularly for lower bands deteriorates
Solution Approach 1:
The switchable parasitic element provides dynamic adjustment capability that compensates for the reduced physical dimensions. When connected, the parasitic element extends the effective electrical length of the antenna, improving lower band transmission effectiveness. The switching mechanism allows the antenna to optimize its electrical characteristics for different frequency bands, maintaining transmission performance despite compact physical dimensions
Solution Approach 2:
The transformer acts as an intermediary component that performs impedance transformation between the feed line and the radiator. This impedance matching mechanism compensates for the effects of reduced antenna dimensions, ensuring efficient power transfer and maintaining transmission effectiveness across both LTE and Penta band frequencies despite the compact antenna size
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
Enables efficient transmission for both LTE and Penta band standards within decreased dimensions, maintaining effective performance across the required frequency bands by adjusting the current path and impedance, thus addressing the dimensional constraints and transmission efficiency issues.
Implementation Method 1
a parasitic element (140) comprising a parasitic extending portion (141) and a parasitic conductive portion (142)
Data Source
AI summary
An antenna module is provided. The antenna module includes a first ground element, a body, a radiator and a parasitic element. The body is electrically connected to the first ground element. The radiator is connected to the body, wherein the radiator includes an extending portion, a bending portion and a terminal portion, and the bending portion is connected to the extending portion, and the terminal portion is connected to the bending portion. The parasitic element includes a parasitic extending portion and a parasitic conductive portion, wherein the parasitic extending portion is connected to the parasitic conductive portion, and the terminal portion and the parasitic extending portion is located on a same straight line, and the terminal portion is separated from the parasitic extending portion.