Antenna Module With Inclined Radiation Element
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Antenna characteristics deteriorate due to limited ground electrode area in mobile terminal antenna modules, leading to insufficient electromagnetic field coupling and reduced radio wave radiation efficiency.
Innovation Solution
The antenna module arranges the radiation element inclined with respect to the ground electrode, ensuring a longer distance in the polarization direction and a shorter distance in the orthogonal direction, maintaining effective coupling and improving frequency band width and directivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the ground electrode area is reduced to downsize the antenna module, then the antenna module size is reduced, but the electromagnetic field coupling between the radiation element and ground electrode becomes insufficient, causing antenna characteristics to deteriorate
Solution Approach 1:
The patent applies asymmetry by arranging the radiation element at an inclined angle of 15-45 degrees relative to the ground electrode rather than in a symmetric parallel arrangement. This asymmetric positioning creates an optimized electromagnetic field distribution that enhances coupling efficiency while accommodating reduced ground electrode area, thereby resolving the contradiction between module downsizing and maintaining antenna performance
Solution Approach 2:
The patent transitions from a two-dimensional planar arrangement to a three-dimensional spatial configuration by tilting the radiation element at an angle relative to the ground electrode. This dimensional change allows the antenna to achieve effective electromagnetic coupling with a smaller ground electrode area while maintaining compact module dimensions, simultaneously addressing both size reduction and performance preservation requirements
2Area of stationary object
If the ground electrode area is limited due to substrate size constraints, then the antenna module can be downsized, but the frequency band width and peak gain of the antenna are reduced
Solution Approach 1:
The inclined arrangement of the radiation element creates an asymmetric electromagnetic field pattern that concentrates field lines more effectively over the limited ground electrode area. This asymmetric configuration optimizes the use of available space, maintaining frequency band width and peak gain despite the reduced ground electrode area constraint
Solution Approach 2:
The patent changes the spatial parameter of the radiation element's angular orientation to optimize electromagnetic coupling. By adjusting the inclination angle within the 15-45 degree range, the system achieves optimal field distribution and coupling efficiency, thereby maintaining antenna performance metrics (frequency band width and peak gain) even with limited ground electrode area
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 suppresses degradation in antenna characteristics by enhancing electromagnetic field coupling, maintaining frequency band width and peak gain, even with limited ground electrode area.
Implementation Method 1
radio waves are radiated from a radiation element by electromagnetic field coupling between the radiation element and a ground electrode arranged so as to face the radiation element
Data Source
AI summary
An antenna module includes a power supply element and a ground electrode (GND) arranged so as to face the power supply element. In a plan view of the antenna module from a normal direction, when a minimum distance along the first direction between a center of the power supply element and an end portion of the ground electrode (GND) is defined as a first distance, a minimum distance between the center of the power supply element and an end portion of the ground electrode (GND) is defined as a second distance, and a distance between the end portion of the ground electrode (GND) and an end portion of the power supply element in the second distance is defined as a third distance, the first distance is longer than the second distance, and the third distance is shorter than ½ of a size of the power supply element.