Antenna Module Feed Pattern for Phase-Based Interference Reduction
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Solution Overview
Problem
In ultra-small wireless communication modules, such as those in thin TVs, signal interference between multiple antennas (e.g., Wi-Fi and Bluetooth) increases due to reduced size, leading to deteriorated wireless transmission performance and Bluetooth sound quality when used simultaneously.
Innovation Solution
An antenna module is designed with a phase difference between antennas using specific feed patterns, where the first radiation unit and second radiation unit have a phase difference of 90 degrees, implemented through multi-layer substrates and feed patterns that connect via holes, minimizing interference by ensuring orthogonality between signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of the wireless communication module is reduced to make TVs thinner, then the device thickness is reduced, but signal interference between antennas increases
Solution Approach 1:
The patent changes the phase parameter of the antenna signals by introducing a 90-degree phase difference through specific feed patterns. This parameter change allows signals to be orthogonal, transforming the harmful interference into a non-interfering relationship while maintaining compact module size.
Solution Approach 2:
The patent uses multi-layer substrate structures with different material properties to achieve the desired phase difference. The feed patterns are implemented across multiple layers with specific dielectric materials, creating a composite structure that produces the required 90-degree phase shift between antenna elements.
2Device complexity
If multiple antennas are placed close together in a small module, then the module complexity is reduced, but wireless transmission performance deteriorates
Solution Approach 1:
The patent changes the phase parameter of antenna signals to create a 90-degree phase difference, making signals orthogonal. This allows multiple antennas to operate simultaneously without performance degradation, resolving the contradiction between simple arrangement and reliable transmission.
Solution Approach 2:
The feed patterns act as intermediary elements that transform the input signals before they reach the antenna elements. By introducing phase-shifting feed networks, the patent mediates between the simple physical arrangement and the required signal orthogonality for reliable simultaneous operation.
3Volume of moving object
If antennas are spaced closer to reduce module size, then the volume is reduced, but Bluetooth sound quality deteriorates
Solution Approach 1:
The patent changes the phase parameter to create orthogonal signals with a 90-degree phase difference. This parameter modification eliminates mutual interference between Wi-Fi and Bluetooth antennas, allowing them to operate simultaneously in close proximity without degrading Bluetooth sound quality.
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 solution effectively minimizes signal interference between Wi-Fi and Bluetooth antennas, maintaining wireless transmission rates and radiation efficiency even in ultra-small modules, allowing simultaneous operation without performance degradation.
Implementation Method 1
the phases of signals being radiated by the first radiation unit and the second radiation unit are different
Implementation Method 2
a first radiation unit being disposed on a substrate and being applied with a current through a first feed pattern; and a second radiation unit being disposed on the substrate being spaced apart from the first radiation unit and applied with a current through a second feed pattern
Data Source
AI summary
An antenna module, according to one embodiment of the present invention, comprises: a first radiation unit disposed on a substrate and having a current applied thereto through a first feed pattern; and a second radiation unit disposed on the substrate so as to be spaced from the first radiation unit, and having a current applied thereto through a second feed pattern, wherein respective signals radiated by the first radiation unit and the second radiation unit have mutually different phases.