Semiconductor Package Air Cavity Antenna Gain
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Solution Overview
Problem
Current semiconductor device packages with antennas face challenges in achieving multi-directional radiation for high-frequency wireless communication, particularly at frequencies like 28 GHz or 60 GHz, due to limitations in substrate materials that affect the performance of radiator and director components.
Innovation Solution
A semiconductor device package design featuring a substrate with an air cavity and trench structure, where the radiator and director are partially embedded within the substrate and exposed to air, allowing for multi-directional radiation by utilizing air as the transmission medium between them, enhancing peak gain and data transmission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dielectric substrate materials are used for antenna components, then structural support and integration are provided, but transmission performance and peak gain are reduced due to material limitations at high frequencies
Solution Approach 1:
The patent extracts the antenna components (radiator and director) from the dielectric substrate material and places them in an air cavity environment. This removal of the harmful dielectric material from the antenna path eliminates signal loss while maintaining structural support through the substrate's mechanical framework. The air cavity serves as the transmission medium, providing the beneficial low-loss property while the substrate provides structural integrity.
Solution Approach 2:
The patent introduces air as an intermediary medium between the radiator and director components. This air medium acts as a mediator that enables efficient electromagnetic wave transmission at high frequencies without the signal loss inherent in dielectric materials. The air cavity serves as the intermediate space that facilitates improved transmission performance while the substrate indirectly supports this arrangement.
2Productivity
If traditional single-directional antenna designs are used, then device complexity is reduced, but communication coverage and data transmission efficiency are limited
Solution Approach 1:
The patent segments the antenna system into distinct functional components: a radiator element and a director element, positioned at opposite sides of an air cavity. This segmentation enables multi-directional radiation patterns that improve communication coverage and data transmission efficiency. Each segment can be optimized independently while working together to achieve omnidirectional or multi-directional performance.
Solution Approach 2:
The patent transitions from a single-directional antenna design to a multi-directional design by utilizing spatial arrangement in three dimensions. The radiator and director are positioned to radiate electromagnetic waves in multiple directions simultaneously, adding dimensional coverage to the communication capability. This spatial dimensionality change enables improved productivity through better coverage without proportionally increasing 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
The design achieves a peak gain 1.3 to 2.3 times higher than traditional antennas, improving data transmission efficiency, especially for high-frequency signals, by using air as the transmission medium between the radiator and director, thereby addressing the limitations of dielectric substrates.
Implementation Method 1
The radiator is disposed adjacent to the first sidewall of the air cavity. The director is disposed adjacent to the second sidewall of the air cavity... achieving a peak gain 1.3 to 2.3 times higher than traditional antennas... by using air as the transmission medium between the radiator and director
Data Source
AI summary
A semiconductor device package includes a substrate, an air cavity, a radiator, and a director. The substrate has a top surface. The air cavity is disposed within the substrate. The air cavity has a first sidewall and a second sidewall opposite to the first sidewall. The radiator is disposed adjacent to the first sidewall of the air cavity. The director is disposed adjacent to the second sidewall of the air cavity.