High-Permittivity Antenna Layers for Compact Phased RF Modules
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Solution Overview
Problem
Electronic devices face challenges in supporting millimeter and centimeter wave communications due to the excessive space occupied by antennas and insufficient radio-frequency performance if not properly managed.
Innovation Solution
The implementation of a phased antenna array with low band and high band antennas on an antenna module, where the antenna layers have a higher dielectric permittivity than the transmission line layers, allowing for interleaving along a common axis and minimizing the lateral footprint, thereby enhancing radio-frequency performance and reducing space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antennas are designed for millimeter and centimeter wave communications, then radio-frequency performance is improved, but the lateral footprint of the antenna module increases
Solution Approach 1:
The patent transitions from planar antenna layout to a three-dimensional stacked configuration with multiple antenna layers separated by ground trace layers. This vertical stacking allows multiple antennas to occupy different Z-heights rather than competing for lateral space, effectively resolving the contradiction between maintaining radio-frequency performance and reducing lateral footprint.
Solution Approach 2:
The patent implements a nested structure where antenna elements are embedded within dielectric layers, which are in turn surrounded by ground traces. Multiple antenna layers are nested vertically within the same lateral footprint, with each antenna element contained within its own dielectric cavity formed by ground traces on adjacent layers.
2Area of stationary object
If antenna elements are placed closer together to reduce footprint, then lateral footprint is reduced, but interference between antennas increases
Solution Approach 1:
The patent introduces ground trace layers as intermediary structures between antenna elements on different layers. These ground traces act as electromagnetic shields that block interference between antennas while allowing vertical coupling. The dielectric layers also serve as intermediaries that isolate adjacent antenna elements laterally while maintaining vertical resonance.
Solution Approach 2:
The patent creates localized electromagnetic environments for each antenna element by surrounding it with ground traces and dielectric material. This local shielding ensures that each antenna operates in its own isolated electromagnetic cavity, preventing interference with neighboring antennas while maintaining the desired resonance characteristics.
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 enables efficient wireless communications across multiple frequency bands while minimizing the physical footprint of the antenna module, allowing for effective operation in millimeter and centimeter wave frequencies with improved radio-frequency performance and adaptability.
Implementation Method 1
The low band antennas and the high band antennas may have antenna resonating elements that are patterned onto the antenna layers. The antenna layers may have a dielectric permittivity that is greater than the dielectric permittivity of the transmission line layers.
Implementation Method 2
The antenna layers may have a dielectric permittivity that is greater than the dielectric permittivity of the transmission line layers. The antenna layers may, for example, have a dielectric permittivity that is greater than 6.0. This may serve to reduce the lateral footprint of the low band antennas and the high band antennas.
Data Source
AI summary
An electronic device may be provided with a phased antenna array on an antenna module. The array may include low band antennas and high band antennas that radiate at frequencies greater than 10 GHz. The module may include antenna layers, transmission line layers, and ground traces that separate the antenna layers from the transmission line layers. The low band antennas and the high band antennas may have radiators patterned onto the antenna layers. The radiators may be fed by transmission lines on the transmission line layers. The antenna layers may have a dielectric permittivity that is greater than the dielectric permittivity of the transmission line layers. This may serve to reduce the lateral footprint of the low band and high band antennas, which allows the antennas to be interleaved along a common linear axis in the phased antenna array, thereby minimizing the lateral footprint of the antenna module.