Antenna-on-Package MMIC Layout for Compact Radar Isolation
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Solution Overview
Problem
Existing radar systems face challenges in miniaturization, power efficiency, and integration with semiconductor packages due to the need for separate coupling of antennas and control circuitry, leading to increased size, power loss, and cost.
Innovation Solution
The integration of transmitter and receiver antennas directly into a Monolithic Microwave Integrated Circuit (MMIC) package with a layered substrate configuration, including antenna and I/O substrates, dielectric layers, and Electromagnetic Band Gap structures, which improves antenna efficiency, reduces size, and simplifies integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If separate coupling of antennas and control circuitry is used, then integration is simplified, but system size increases and power loss increases
Solution Approach 1:
The patent combines the antennas and control circuitry into a single integrated MMIC package. The transmitter and receiver antennas are directly integrated with the radar controller die, eliminating the need for separate coupling mechanisms. This merging reduces the overall system volume while maintaining functional separation through on-die integration, directly resolving the contradiction between integration simplicity and system size.
2Device complexity
If separate coupling of antennas and control circuitry is used, then integration is simplified, but power loss increases
Solution Approach 1:
By merging the antennas and control circuitry onto the same MMIC package, the patent minimizes the transmission path length between components. This direct integration reduces signal loss and power consumption associated with external coupling structures, while the modular MMIC package design keeps the integration process manageable.
3Volume of moving object
If antennas are integrated into MMIC package, then system size is reduced and power loss is reduced, but antenna isolation becomes challenging
Solution Approach 1:
The patent segments the MMIC package into distinct functional regions: a first substrate containing transmitter antennas, a second substrate containing receiver antennas, and an integrated circuit die in between. This spatial segmentation physically separates the transmitter and receiver antenna paths, providing natural isolation. Additionally, via structures are strategically placed to provide electromagnetic shielding and further enhance isolation between the antenna segments.
4Object-affected harmful factors
If layered substrate configuration is used, then antenna isolation is improved and signal routing is simplified, but manufacturing complexity increases
Solution Approach 1:
The patent transitions from a planar antenna design to a three-dimensional layered substrate configuration. The via structures extend vertically through multiple dielectric layers, creating a stacked architecture that achieves superior antenna isolation in the vertical dimension. This dimensional approach allows isolation and signal routing functions to be achieved within a compact volume, making the complex manufacturing process more efficient by utilizing vertical integration rather than lateral expansion.
Data Source
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AI summary
In some examples, an integrated circuit package (100) is an antenna-on-package package that includes an integrated circuit die (102) and an antenna substrate (110) coupled to the integrated circuit die (102). The antenna substrate (110) includes a conductor layer (130) and a first dielectric layer (118) disposed between the conductor layer (130) and the integrated circuit die (102). The conductor layer (130) includes antennas (154) electrically coupled to the integrated circuit die (102). The integrated circuit package (100) further includes an I/O substrate (112) coupled to the integrated circuit die (102) opposite the antenna substrate (110). In some such examples, the I/O substrate (112) includes interconnect connectors (152) and a second dielectric layer (126) disposed between the interconnect connectors (152) and the integrated circuit die (102). In some such examples, the integrated circuit package (100) includes interconnect connectors (150) extending between the antenna substrate (110) and the EO substrate (112).