Multi-Layer Antenna Structure for Wideband mmWave Coverage
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Solution Overview
Problem
Designing an antenna structure that can operate in a wide band to cover multiple millimeter wave bands, such as the 28 GHz and 38.5 GHz bands, with a single antenna is challenging due to the difficulty in achieving efficient coverage and minimizing interference between frequency bands.
Innovation Solution
The proposed solution involves a multi-layer substrate antenna structure with differently configured upper and lower radiators connected by vertical vias, allowing for dual resonance characteristics and notch filter functionality, enabling the antenna to operate effectively across a wide band (24 to 50 GHz) while avoiding interference in specific frequency ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single antenna is used to cover multiple millimeter wave bands, then the device complexity is reduced, but it becomes difficult to achieve efficient coverage and minimize interference between frequency bands
Solution Approach 1:
The antenna is divided into multiple radiators, each responsible for specific frequency bands. The first radiator covers the first band, the second radiator covers the second band, and the third radiator covers the third band. This segmentation allows each radiator to be optimized for its specific frequency range, achieving efficient coverage while maintaining a unified antenna structure.
Solution Approach 2:
Each radiator is designed with specific local characteristics optimized for its target frequency band. The radiators have different geometric configurations and impedance characteristics tailored to their respective frequency ranges, enabling each portion of the antenna to perform its function with high efficiency while the overall structure remains integrated.
2Adaptability or versatility
If multiple array antennas are disposed to cover different millimeter wave bands, then the frequency band coverage is improved, but the device complexity and space requirement increase
Solution Approach 1:
Multiple radiators that would traditionally require separate antenna structures are merged into a single integrated antenna assembly. The radiators share common support structures, feeding networks, and housing, allowing the device to cover multiple frequency bands with one unified antenna configuration rather than requiring multiple discrete antennas.
Solution Approach 2:
The antenna structure is designed as a universal multi-functional unit where different radiators can operate across multiple frequency bands. The same physical antenna structure serves multiple purposes by activating different radiators or combinations thereof depending on the required frequency band, eliminating the need for separate dedicated antennas for each band.
3Volume of moving object
If radiators are closely spaced to reduce device size, then the compactness is improved, but the interference between frequency bands increases
Solution Approach 1:
The harmful electromagnetic interference between closely spaced radiators is extracted and managed through dedicated shielding structures and isolation elements. These extracted interference paths are then directed to ground or dissipated through controlled impedance structures, allowing compact radiator spacing without sacrificing frequency band isolation.
Solution Approach 2:
Isolation structures and shielding elements are introduced as intermediary components between the radiators. These intermediaries act as electromagnetic barriers that prevent direct coupling and interference between adjacent radiators operating at different frequency bands, enabling compact placement while maintaining frequency selectivity.
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 enhances antenna efficiency, increases millimeter wave coverage, and reduces interference, achieving improved return loss and radiation patterns across the desired frequency bands.
Implementation Method 1
differently configured upper and lower radiators connected by vertical vias, allowing for dual resonance characteristics
Implementation Method 2
allowing for dual resonance characteristics and notch filter functionality, enabling the antenna to operate effectively across a wide band (24 to 50 GHz) while avoiding interference in specific frequency ranges
Data Source
AI summary
An electronic device including an antenna, according to one embodiment, is provided. The electronic device can comprise: a first radiator in which metal patterns having a predetermined width and length are stacked on different layers of a multi-layer substrate; and a second radiator in which metal patterns having a predetermined width and length are stacked on top of the first radiator. The electronic device can further comprise a transceiver circuit for connecting to any one metal pattern from among the first radiator and the second radiator through a feeding line.