Stepped Antenna Package Shielding for RFIC EMI Isolation
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Solution Overview
Problem
Existing antenna package structures face challenges in integrating antennas and RFICs due to the need for electromagnetic wave isolation, which contradicts the requirement for radiation and reception.
Innovation Solution
The antenna package structure includes a substrate with stepped sidewalls and a shielding layer that covers communication devices while exposing the antenna layer, ensuring electromagnetic isolation without interfering with its operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna and RFIC are integrated in the same package, then the device size is reduced and signal transfer losses are minimized, but electromagnetic interference between the antenna and communication devices occurs
Solution Approach 1:
The substrate is divided into multiple levels with different heights, creating distinct regions for the antenna and communication devices. The stepped substrate structure segments the package into an upper portion for communication devices and a lower portion for the antenna, physically separating them to reduce electromagnetic interference while maintaining integration benefits
Solution Approach 2:
A shielding layer is introduced as an intermediary element between the antenna and communication devices. This shielding layer covers the communication devices and extends along the sidewalls of the substrate, acting as a barrier that blocks electromagnetic interference while allowing both components to coexist in the same package
2Object-affected harmful factors
If a shielding layer is added to isolate the communication device, then electromagnetic interference is reduced, but the structure complexity increases
Solution Approach 1:
The shielding layer is merged with the substrate structure by extending it along the sidewalls of the substrate. This integration of the shielding function into the existing substrate geometry reduces the need for separate shielding components and simplifies the overall manufacturing process
Solution Approach 2:
The substrate serves multiple functions: it provides mechanical support, creates the stepped structure for spatial separation, and when combined with the shielding layer, provides electromagnetic interference protection. This multi-functionality reduces the need for additional components and simplifies the overall structure
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 solution allows the antenna to function effectively by isolating communication devices from electromagnetic interference while enabling efficient radiation and reception of electromagnetic waves.
Implementation Method 1
The shielding layer covers the communication device and the sidewall of the upper portion of the substrate
Implementation Method 2
The lower portion includes an antenna layer... enabling efficient radiation and reception of electromagnetic waves
Data Source
AI summary
An antenna package structure includes a substrate, a communication device, and a shielding layer. The substrate has an upper portion and a lower portion. The lower portion includes an antenna layer. The substrate has stepped sidewalls on opposite sides, and each of the stepped sidewalls includes a sidewall of the upper portion and a sidewall of the lower portion. The communication device is attached to the upper portion of the substrate. The shielding layer covers the communication device and the sidewall of the upper portion of the substrate.