Stacked UWB Antenna Structure for Wideband Coverage in Less Space
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of reducing the space occupied by UWB antenna arrays on electronic devices while maintaining good performance, particularly due to the large area required by patch antennas operating in multiple frequency bands, is addressed.
Innovation Solution
The design incorporates a first and second radiation patch with non-overlapping short-circuit walls on a metal substrate, utilizing a filling medium like liquid crystal polymer to adjust thickness and enhance efficiency, and a coupled feed structure to improve excitation, allowing the antenna to operate in a wide frequency band with reduced size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the area of the radiation patch is increased to enable operation in two frequency bands, then the antenna can operate in a wider frequency band, but the space occupied by the UWB antenna array on the electronic device becomes greater
Solution Approach 1:
The patent transitions from a planar two-dimensional patch antenna to a three-dimensional stacked structure with multiple radiation patches at different heights. The first radiation patch is positioned above the metal substrate, the second radiation patch is positioned above the first radiation patch, and a third radiation patch is positioned above the second radiation patch, creating vertical layering that enables multi-frequency operation without increasing horizontal footprint
Solution Approach 2:
The patent implements a nested stacked configuration where multiple radiation patches are vertically integrated in a compact arrangement. The first, second, and third radiation patches are nested along the vertical axis, with each patch contributing to different frequency bands while sharing the same horizontal space, effectively nesting multiple functional elements within a confined volume
2Area of stationary object
If multiple patch antennas are stacked to reduce space occupied by the antenna, then the space occupied by the antenna on the electronic device is reduced, but radiation efficiency of the stacked patch antennas becomes poor
Solution Approach 1:
The patent applies local quality by positioning short-circuit walls at specific locations between adjacent radiation patches rather than uniformly across the entire structure. The first short-circuit wall is positioned between the first and second radiation patches, and the second short-circuit wall is positioned between the second and third radiation patches, creating localized electromagnetic field control that optimizes radiation efficiency for each patch while maintaining compact vertical stacking
Solution Approach 2:
The short-circuit walls serve as intermediary elements between adjacent radiation patches in the stacked configuration. These walls mediate the electromagnetic coupling between patches, controlling the interaction and enabling efficient radiation across multiple frequency bands while maintaining the compact vertical structure
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 reduces the antenna's footprint on the device, increases space for other components, and enhances radiation efficiency by aligning electric field directions and achieving high magnetic current offset.
Implementation Method 1
a resonance point of the first radiation patch is the first frequency, and a resonance point of the second radiation patch is the second frequency
Implementation Method 2
utilizing a filling medium like liquid crystal polymer to adjust thickness and enhance efficiency
Data Source
AI summary
This application provides an antenna, an ultra wide band antenna array, and an electronic device, where the antenna operates in a target frequency band and is arranged on a metal substrate, and the antenna includes a first radiation patch, a second radiation patch, a first short-circuit wall, and a second short-circuit wall, a projection of the first radiation patch on the metal substrate overlaps with a projection of the second radiation patch on the metal substrate, a projection of the first short-circuit wall on the metal substrate does not overlap with a projection of the second short-circuit wall on the metal substrate, the first short-circuit wall is respectively connected to the first radiation patch and the metal substrate, the second short-circuit wall is respectively connected to the first radiation patch and the second radiation patch.