Reducing Electromagnetic Coupling in Radar Systems with Optimized Adhesive Layers
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Summary
Problems
Conventional radar systems experience electromagnetic energy leakage through adhesive layers, leading to unwanted coupling between vertical feed lines, which deteriorates range accuracy, angle accuracy, and noise floor, and current solutions are either costly or require expensive materials.
Innovation solutions
The adhesive layer in the radar system is optimized with strategically designed cut-out regions having non-straight side boundaries to deflect electromagnetic waves, reducing energy leakage and coupling between vertical feed lines without using conductive materials or expensive hybrid PCBs.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a conventional adhesive layer is used to mount the antenna PCB to the RCM, then the mounting is simple and low-cost, but electromagnetic energy leaks into the adhesive layer causing unwanted coupling between vertical feed lines
Why choose this principle:
The adhesive layer is segmented by introducing cut-out regions that divide the continuous adhesive into isolated sections. This segmentation prevents electromagnetic energy from propagating through the adhesive layer between vertical feed lines, thereby reducing unwanted coupling while maintaining the adhesive's mounting function in the remaining areas.
Principle concept:
If a conventional adhesive layer is used to mount the antenna PCB to the RCM, then the mounting is simple and low-cost, but electromagnetic energy leaks into the adhesive layer causing unwanted coupling between vertical feed lines
Why choose this principle:
Specific portions of the adhesive layer are extracted or removed to create cut-out regions. These removed sections act as electromagnetic isolation barriers, eliminating the harmful coupling path while preserving the adhesive layer's structural mounting capability in the retained areas.
Application Domain
Data Source
AI summary:
The adhesive layer in the radar system is optimized with strategically designed cut-out regions having non-straight side boundaries to deflect electromagnetic waves, reducing energy leakage and coupling between vertical feed lines without using conductive materials or expensive hybrid PCBs.
Abstract
Provided is a radar system, comprising: an antenna printed circuit board ( 1 ) comprising at least one transmit antenna and at least one receive antenna; a radar control module ( 3 ); an adhesive layer ( 2 ) provided between the antenna printed circuit board ( 1 ) and the radar control module ( 3 ); and vertical feed lines ( 4, 5, 55 ) respectively connecting the at least one transmit antenna and the radar control module ( 3 ) and respectively connecting the at least one receive antenna and the radar control module ( 3 ); whereby the adhesive layer ( 2 ) comprises at least one cut-out region ( 8, 60 ) being structured by having a non-straight side boundary to direct an electromagnetic wave emanating from a first vertical feed line ( 4 ) away from arriving at one or more of the vertical feed lines ( 4, 5, 55 ).