Slotted Antenna Radiator Layout for Wider Bandwidth
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Solution Overview
Problem
Current antennas, such as resonant and Half-Wavelength Dipole Antennas, have limited bandwidth due to their size-dependent frequency characteristics, making it challenging to achieve wideband communication within compact devices without increasing the antenna size.
Innovation Solution
The design incorporates a planar body with slots and notches that constrain surface currents to resonate along an exponential curve, independent of wavelength, allowing for a wider frequency bandwidth within a compact size by adjusting the shape of the slots and notches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna size is reduced for compact device integration, then the device compactness is improved, but the frequency bandwidth decreases
Solution Approach 1:
The planar body is divided into at least four radiation blocks by slots crossing the center, creating segmented current paths that enable multiple resonance modes within a compact structure, thereby achieving wideband operation without increasing overall antenna size
Solution Approach 2:
Notches are positioned asymmetrically between adjacent radiation blocks with specific depth and width variations, creating non-uniform current distribution and multiple resonance frequencies that expand the operational bandwidth while maintaining a compact form factor
2Adaptability or versatility
If the antenna size is increased to achieve wider frequency bandwidth, then the frequency bandwidth is improved, but the device compactness deteriorates
Solution Approach 1:
The antenna utilizes the depth dimension by incorporating notches with specific depth-to-width ratios, transforming a 2D planar structure into a 3D configuration that provides additional resonance modes and bandwidth expansion without increasing the footprint area
3Adaptability or versatility
If slots and notches are added to constrain surface currents, then the frequency bandwidth is improved, but the device complexity increases
Solution Approach 1:
Slots and notches are strategically positioned at specific locations on the planar body with precise dimensional ratios, creating localized current constraints that generate multiple resonance modes without requiring complex overall structure, thereby achieving wideband operation with moderate complexity
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 approach enables a compact antenna to achieve a wider frequency bandwidth without increasing its size, providing dual polarization and improved surface current distribution, enhancing communication capabilities.
Implementation Method 1
The at least one slot and the at least one notch specify a surface current distribution of the antenna radiator
Data Source
AI summary
The present disclosure relates to an antenna radiator, and an antenna. An antenna radiator comprises: a planar body; at least one slot located in the planar body; and at least one notch located on at least one outer side of the planar body, respectively. The at least one slot crosses a center of the planar body, to basically divide the planar body to at least four radiation blocks. A notch of the at least one notch is located between two adjacent radiation blocks of the at least four radiation blocks. A length direction of the notch extends along an outer side of the planar body at which the notch is located. According to embodiments of the present disclosure, the frequency bandwidth of the antenna radiator may be enlarged, without enlarging the overall size.