Multi-band Antenna Module with Localized Dielectrics
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Solution Overview
Problem
Multi-band antennas with a stack structure face challenges in optimizing antenna characteristics for different frequency bands due to structural restrictions, leading to suboptimal performance across various frequency bands.
Innovation Solution
The antenna module employs a dielectric substrate with two radiating electrodes of different sizes, where the smaller electrode overlaps with the larger one, and dielectrics with distinct dielectric constants are positioned over and around the electrodes to enhance antenna characteristics for each frequency band, allowing for improved frequency bandwidth and beam pattern control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-band antenna with a stack structure is used to transmit and receive electric waves in different frequency bands, then the antenna can support multiple communication standards, but it is not necessarily possible to optimize antenna characteristics for each frequency band due to structural restrictions
Solution Approach 1:
The patent applies local quality by disposing different dielectrics (first dielectric and second dielectric with different dielectric constants) at different locations around the radiating electrodes. The second dielectric is positioned between the first and second radiating electrodes, while the first dielectric is disposed around the first radiating electrode. This localized differentiation allows each frequency band to be optimized independently, resolving the contradiction between multi-band capability and antenna characteristics optimization.
2Loss of energy
If radiating electrodes are disposed in an overlapping manner on a shared dielectric substrate, then the aperture efficiency increases and arrangement density reduces, but the antenna characteristics for different frequency bands cannot be optimized
Solution Approach 1:
The patent maintains the overlapping stack structure for power loss reduction but introduces local quality differentiation by placing different dielectrics at specific locations. The second dielectric between the radiating electrodes optimizes higher frequency band characteristics, while the first dielectric around the first radiating electrode optimizes lower frequency band characteristics, thus resolving the contradiction between energy efficiency and characteristics optimization.
Solution Approach 2:
The patent uses composite materials by combining multiple dielectrics with different dielectric constants in a single antenna structure. This composite approach allows the antenna to achieve optimized characteristics for multiple frequency bands simultaneously while maintaining the efficient overlapping configuration, resolving the contradiction between power loss reduction and characteristics optimization.
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 effectively widens the frequency bandwidth and improves antenna characteristics for both lower and higher frequency radiating electrodes, enabling better performance across multiple frequency bands while maintaining efficient surface acoustic wave control.
Implementation Method 1
improves antenna characteristics for both lower and higher frequency radiating electrodes, enabling better performance across multiple frequency bands while maintaining efficient surface acoustic wave control
Data Source
AI summary
An antenna module includes a dielectric substrate, first and second radiating electrodes, a ground electrode, and first and second dielectrics on a top part of the dielectric substrate. The second radiating electrode is smaller in size than the first radiating electrode and overlaps with the first radiating electrode in a plan view in a direction of a normal line of the dielectric substrate. The ground electrode is disposed to face the first and second radiating electrodes. The first and second dielectrics have different dielectric constants. The first radiating electrode is disposed between the second radiating electrode and the ground electrode. In the plan view in the direction of the normal line of the dielectric substrate, the second dielectric lies over the second radiating electrode and is disposed within an area of the first radiating electrode. The first dielectric lies over at least a peripheral edge of the first radiating electrode.