Antenna-on-Package Layout for Compact Low-Loss Radar Integration
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Solution Overview
Problem
Conventional radar systems face challenges in miniaturization, power loss, and integration complexity due to the need for separate antennas and control circuitry, which limits their application in compact environments and increases costs.
Innovation Solution
A Monolithic Microwave Integrated Circuit (MMIC) package integrates transmitter and receiver antennas with radar-processing circuitry, referred to as an Antenna-On-Package (AOP) device, where antennas are formed directly on the package substrates, reducing size and power loss, and using Electromagnetic Band Gap (EBG) structures for isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If separate antennas and control circuitry are used in conventional radar systems, then the system can be designed with modular components, but the system size increases and miniaturization is limited
Solution Approach 1:
The patent merges the antennas and control circuitry into a single integrated package structure. The antennas are formed directly on the package substrates, and the control circuitry is embedded within the same package, eliminating the need for separate modular components and reducing overall system volume while maintaining functional integrity
Solution Approach 2:
The patent transitions from a planar, two-dimensional layout of separate components to a three-dimensional integrated structure where antennas and circuitry coexist within the package volume. This vertical integration approach reduces the footprint and enables miniaturization by utilizing the third dimension for component placement and interconnection
2Loss of energy
If separate antennas and control circuitry are used in conventional radar systems, then component design is simplified, but power loss increases due to longer signal paths
Solution Approach 1:
By combining the antennas and control circuitry into the same package, the signal path length is dramatically reduced. The antennas are electrically connected to the control circuitry through short interconnects within the package substrate, minimizing resistive losses and improving power efficiency compared to conventional systems with separate components
Solution Approach 2:
The package substrate acts as an intermediary structure that provides both mechanical support and electrical interconnection between the antennas and control circuitry. This intermediary enables direct, low-loss signal transmission while maintaining design flexibility through standardized substrate configurations and interconnect technologies
3Ease of manufacture
If separate antennas and control circuitry are used in conventional radar systems, then each component can be optimized independently, but integration complexity and costs increase
Solution Approach 1:
The integration of antennas and control circuitry into a single package enables simultaneous fabrication using compatible manufacturing processes. The antennas are formed using standard PCB techniques, and the control circuitry is integrated using semiconductor fabrication, allowing both components to be manufactured together in the same facility, reducing assembly costs and improving manufacturing efficiency
Solution Approach 2:
The package structure serves multiple functions simultaneously: it provides mechanical support for the antennas and circuitry, electrical interconnection between components, shielding and isolation using EBG structures, and thermal management. This multi-functionality reduces the need for additional components and simplifies the overall manufacturing process
4Object-generated harmful factors
If conventional separate antenna systems are used, then antenna design is straightforward, but spurious radiation increases and signal routing becomes complex
Solution Approach 1:
The package substrate with integrated EBG structures acts as an intermediary that provides electromagnetic isolation between different antenna elements and signal paths. This intermediary structure suppresses spurious radiation and parasitic coupling while guiding signals through controlled impedance traces, reducing both harmful emissions and routing complexity
Solution Approach 2:
The EBG structures are strategically placed in specific locations within the package where spurious radiation and parasitic coupling are most problematic. This localized approach to electromagnetic isolation targets specific interference sources without requiring comprehensive shielding throughout the entire system, reducing overall complexity while maintaining performance
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, reduces system size, simplifies integration, and lowers costs by eliminating the need for printed circuit boards, while improving signal routing and reducing spurious radiation.
Implementation Method 1
using Electromagnetic Band Gap (EBG) structures for isolation
Data Source
AI summary
An integrated circuit package is provided. In some examples, the integrated circuit package is an antenna-on-package package that includes an integrated circuit die and an antenna substrate coupled to the integrated circuit die. The antenna substrate includes a conductor layer and a first dielectric layer disposed between the conductor layer and the integrated circuit die. The conductor layer includes antennas electrically coupled to the integrated circuit die. The integrated circuit package further includes an I/O substrate coupled to the integrated circuit die opposite the antenna substrate. In some such examples, the I/O substrate includes interconnect connectors and a second dielectric layer disposed between the interconnect connectors and the integrated circuit die. In some such examples, the integrated circuit package includes interconnect connectors extending between the antenna substrate and the I/O substrate.