Antenna Device With Cavity-Backed Ground For Dual-Band Operation
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Solution Overview
Problem
Conventional antenna devices face challenges with high structural and manufacturing complexity, limited frequency band operation, and signal interference due to the need for multiple probes and coaxial cables, which complicates design and increases size, making them unsuitable for compact and efficient deployment in 5G communication systems.
Innovation Solution
The antenna device features a compact design with a cavity-backed ground structure, multiple feeding lines, and non-continuous slots that eliminate the need for additional components like probes and cables, allowing for dual-band operation with reduced interference between frequency bands, using a patch radiator and a multilayer printed circuit board for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple probes and coaxial cables are used to feed current to multiple radiators, then the antenna device can operate in multiple frequency bands, but the structural complexity and manufacturing complexity increase significantly
Solution Approach 1:
The patent combines multiple feeding functions into a single integrated feeding network structure. The feeding network integrates multiple feeding lines, impedance transforming units, and switching units into one unified component that can feed multiple radiators operating at different frequency bands, eliminating the need for separate probes and coaxial cables for each radiator.
Solution Approach 2:
The feeding network is designed as a universal structure that can serve multiple radiators across different frequency bands. The switching units enable the feeding network to dynamically connect different radiators based on the operating frequency band, making the feeding network multi-functional rather than requiring dedicated feeding structures for each radiator.
2Adaptability or versatility
If multiple probes and coaxial cables are used to feed current to multiple radiators, then the antenna device can operate in multiple frequency bands, but the manufacturing complexity increases
Solution Approach 1:
The patent combines multiple feeding functions into a single integrated feeding network structure. The feeding network integrates multiple feeding lines, impedance transforming units, and switching units into one unified component that can feed multiple radiators operating at different frequency bands, eliminating the need for separate probes and coaxial cables for each radiator.
3Volume of moving object
If a high frequency band radiator is embedded inside a low frequency band radiator, then the antenna device size is reduced, but signal interference between frequency bands increases
Solution Approach 1:
The patent introduces an impedance transforming unit as an intermediary component between the feeding line and the radiator. This impedance transforming unit acts as a mediator that isolates the high frequency band radiator from the low frequency band radiator, preventing signal interference while maintaining the compact embedded structure. The impedance transformation also improves the matching between the feeding line and radiator, further reducing interference.
4Volume of moving object
If the antenna device size is reduced by embedding radiators, then compactness is improved, but the complexity of routing signals increases
Solution Approach 1:
The patent combines multiple feeding functions into a single integrated feeding network structure. The feeding network integrates multiple feeding lines, impedance transforming units, and switching units into one unified component that can feed multiple radiators operating at different frequency bands, eliminating the need for separate probes and coaxial cables for each radiator.
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 results in a significantly simpler and more compact antenna device with reduced complexity, enabling efficient dual-band operation without performance degradation, suitable for 5G communication systems, and supports a higher number of users while maintaining structural integrity.
Implementation Method 1
an antenna device includes a cavity-backed ground structure
Implementation Method 2
the top layer having a first slot, a second slot, a third slot and a fourth slot formed in the top layer
Data Source
AI summary
An antenna device includes a first feeding node and a second feeding node, a bottom layer arranged as a cavity-backed ground, and a middle layer arranged above bottom layer. A first feeding line and a third feeding line of middle layer are electrically connected to first feeding node and a second feeding line and a fourth feeding line of middle layer are electrically connected to second feeding node. The antenna device further includes a top layer arranged above middle layer. The top layer has four slots, where a portion of first slot, a portion of second slot, a portion of third slot and a portion of fourth slot overlap with a portion of first feeding line, a portion of second feeding line, a portion of third feeding line and a portion of fourth feeding line, respectively. A radiator arranged above top layer at a distance from top layer.