Antenna-on-Package Radar MMIC With EBG Isolation
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Solution Overview
Problem
Conventional radar systems face challenges in miniaturization, power efficiency, and integration due to the need for separate antenna and control circuitry components, leading to increased size and power consumption, as well as interference issues between transmitter and receiver antennas.
Innovation Solution
A Monolithic Microwave Integrated Circuit (MMIC) package integrates transmitter and receiver antennas with radar-processing circuitry, featuring a cavity-backed antenna design and Electromagnetic Band Gap structures to improve isolation and efficiency, allowing for compact integration and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If separate antenna and control circuitry components are used, then device functionality is achieved, but device size increases
Solution Approach 1:
The patent combines transmitter and receiver antennas with radar-processing circuitry into a single MMIC package, eliminating the need for separate antenna and control circuitry components. This integration directly reduces device size while maintaining full radar functionality through monolithic microwave integrated circuit technology.
2Use of energy by moving object
If separate antenna and control circuitry components are used, then device functionality is achieved, but power consumption increases
Solution Approach 1:
The integration of antennas and radar-processing circuitry into a single MMIC package reduces power consumption by eliminating power losses associated with separate components and interconnections. The monolithic structure enables more efficient signal processing and reduces overall system power requirements.
3Reliability
If conventional antenna design is used, then antenna functionality is achieved, but mutual coupling between transmitter and receiver antennas occurs
Solution Approach 1:
The patent introduces Electromagnetic Band Gap (EBG) structures as intermediary elements between transmitter and receiver antennas. These EBG structures act as electromagnetic filters that block spurious radiation and reduce mutual coupling between antenna elements, thereby improving signal quality and reducing interference.
Solution Approach 2:
The cavity-backed antenna design extracts and isolates the radiating elements from the substrate, reducing electromagnetic coupling between transmitter and receiver antennas. This extraction of the antenna elements into a controlled cavity environment minimizes spurious radiation and improves signal integrity.
4Reliability
If conventional antenna design is used, then antenna functionality is achieved, but antenna efficiency is reduced
Solution Approach 1:
The EBG structures serve as intermediary electromagnetic filters that improve antenna efficiency by blocking surface waves and spurious radiation paths. This intermediary structure enhances the radiative efficiency of the antennas while maintaining a compact integrated design.
Solution Approach 2:
The cavity-backed configuration extracts the antenna elements from the substrate plane, creating a controlled radiation environment that improves antenna efficiency. This extraction reduces unwanted electromagnetic interactions and enhances the overall radiative performance of the integrated antenna system.
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 integration of antennas and circuitry in a single package enhances radar performance by reducing size, power consumption, and spurious radiation, while improving antenna efficiency and reducing mutual coupling, thereby enabling more accurate angle-of-arrival estimation and efficient signal routing.
Implementation Method 1
the integrated circuit package includes an electromagnetic band gap structure disposed between the at least one transmitter antenna and the at least one receiver antenna
Implementation Method 2
the antennas are cavity-backed antennas
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 a plurality of dielectric layers, a plurality of conductor layers interspersed with the plurality of dielectric layers, and an integrated circuit die disposed on a first side of the plurality of dielectric layers. The plurality of conductor layers includes a first layer disposed on a second side of the plurality of dielectric layers that includes a set of antennas. In some such examples, the integrated circuit die includes radar processing circuitry, and the AOP integrated circuit package is configured for radar applications.