Grooved Ceramic Chip Antenna for 5G Miniaturization
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Solution Overview
Problem
The challenge in developing a compact antenna for 5G communication systems is the difficulty in miniaturizing antennas for high-frequency GHz bands due to the short wavelength of RF signals, which leads to increased interference and reduced radiation efficiency.
Innovation Solution
A chip antenna design utilizing ceramic substrates with precision-formed grooves and patches that protrude from these grooves, allowing for a reduced overall size while maintaining radiation efficiency by adjusting the dielectric constant and spacing between substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna size is reduced for 5G high-frequency bands, then the antenna can be mounted in mobile communication terminals, but the wavelength is reduced to just a few mm causing increased interference and reduced radiation efficiency
Solution Approach 1:
The patent transitions from a planar antenna structure to a three-dimensional structure by forming grooves in the ceramic substrate and placing patches within these grooves. The patches protrude from the groove surfaces at different heights, creating vertical dimensionality. This 3D configuration allows the antenna to maintain effective radiating dimensions while reducing the overall footprint area, thereby improving radiation efficiency in a compact form factor suitable for mobile terminals.
Solution Approach 2:
The patent embeds the radiating patches within grooves formed in the ceramic substrate. The patches are nested within the recessed groove structures, with portions of the patches extending above the groove surfaces. This nesting approach allows the antenna elements to be contained within a smaller volume while maintaining their functional dimensions, effectively reducing the overall antenna size without sacrificing radiation performance.
2Volume of moving object
If the antenna size is reduced for 5G high-frequency bands, then the antenna can be mounted in mobile communication terminals, but interference increases due to short wavelength
Solution Approach 1:
By creating vertical protrusions of patches from the groove surfaces, the patent establishes multiple height levels within the compact antenna structure. This vertical dimensionality increases the effective radiating aperture without increasing the horizontal footprint, allowing the antenna to maintain adequate electrical dimensions for reduced interference while fitting within the constrained volume of mobile terminals.
Solution Approach 2:
The patent creates non-uniform height distributions of the radiating patches across different locations. Patches at different positions protrude to different extents from the groove surfaces, creating localized variations in the radiating structure. This non-uniform configuration optimizes the current distribution and radiation pattern, reducing interference effects while maintaining compact overall dimensions.
Data Source
AI summary
A chip antenna includes a first ceramic substrate, a second ceramic substrate disposed to face the first ceramic substrate, a first patch disposed on the first ceramic substrate to operate as a feed patch, and a second patch disposed on the second ceramic substrate to operate as a radiation patch. One or both of the first ceramic substrate and the second ceramic substrate include a groove, and one or both of the first patch and the second patch is disposed in the groove of the respective first ceramic substrate and second ceramic substrate and protrudes from the groove.