Antenna-in-Package Coupling Structure for Accurate RF Testing
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Solution Overview
Problem
Existing testing methods for antennas in packages (AiP) fail to provide accurate alignment and coupling, leading to poor signal isolation and interference, which affects the performance and efficiency of the antenna system.
Innovation Solution
The method involves using a coupling structure that integrates an antenna in a package, a radio frequency chip, and a test device, which includes a coupling structure and a testing terminal, allowing for stable and reliable testing of RF signals without the need for additional external load boards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If end-fire antenna testing method is used for alignment coupling, then testing can be performed, but alignment accuracy deteriorates leading to poor isolation and fluctuant testing accuracy
Solution Approach 1:
The patent introduces a coupling structure as an intermediary component between the antenna and testing terminal. This coupling structure includes a coupling element that is coupled to the radiation unit of the antenna and a testing terminal, serving as a mediator to transmit RF test signals. This intermediary structure eliminates the need for precise alignment coupling between external test equipment and the antenna, thereby resolving the alignment accuracy problem while maintaining testing precision.
2Ease of operation
If external load board is used for signal transmission, then testing can be performed, but device complexity increases
Solution Approach 1:
The patent merges the coupling structure and testing terminal into an integrated unit that is disposed within the package body. The coupling structure is coupled to the radiation unit of the antenna and the testing terminal, combining multiple functions (signal coupling, transmission, and testing interface) into a single integrated structure. This eliminates the need for separate external load boards and reduces overall device complexity while maintaining testing stability.
3Manufacturing precision
If coupling structure is integrated in package body, then alignment deviations are reduced, but manufacturing complexity increases
Solution Approach 1:
The coupling structure is pre-integrated into the package body during the packaging process, before the actual testing phase. The coupling element is positioned and coupled to the radiation unit of the antenna within the package body, and the testing terminal is configured to form a testing loop. This preliminary integration ensures precise alignment is achieved during manufacturing rather than during testing, and the structure is designed to be compatible with standard packaging processes to minimize manufacturing 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 method provides stable and reliable testing of RF signals by reducing alignment deviations and improving testing accuracy, thereby enhancing the performance and efficiency of the antenna system.
Implementation Method 1
The one or more coupling structures are coupled to one or more radiation units of the at least one antenna, and each coupling structure of the one or more coupling structures is coupled to a respective testing terminal of the at least one testing terminal. The one or more coupling structures are configured to transmit radio frequency test signals of a radio frequency link in which the one or more radiation units are disposed during testing the radio frequency link.
Data Source
AI summary
The present disclosure provides an antenna in package, a RF chip, a test device and a test method. The antenna in package includes at least one antenna, one or more coupling structures and at least one testing terminal. The at least one antenna, the one or more coupling structures and the at least one testing terminal are disposed in a package body. The one or more coupling structures are coupled to one or more radiation units of the at least one antenna, and each coupling structure of the one or more coupling structures is coupled to a respective testing terminal of the at least one testing terminal. The one or more coupling structures are configured to transmit RF test signals of a RF link in which the one or more radiation units are disposed during testing the RF link.