Solderable Waveguide Antenna Assembly for Precise PCB Alignment
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Solution Overview
Problem
Conventional methods for attaching radio frequency (RF) waveguide antennas to printed circuit boards (PCBs) often fail to provide a cost-effective and precise mechanical bonding with proper alignment and standoff heights.
Innovation Solution
A solderable waveguide antenna design featuring a plastic body with metallic portions disposed on dimples, which are soldered to corresponding metallic portions on the PCB, allowing for precise alignment and secure mechanical bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If screws or pressure sensitive adhesives are used to affix waveguides to PCBs, then the waveguides can be attached, but the alignment precision and standoff height control are insufficient
Solution Approach 1:
The attachment structure is segmented into multiple functional elements: solder pads on the PCB, corresponding receptacles on the waveguide, and solder joints as the bonding medium. This segmentation allows each element to be optimized independently for precision while simplifying the overall attachment process.
Solution Approach 2:
The patent replaces the mechanical fastening system (screws) or adhesive system (pressure sensitive adhesives) with a soldering system. This substitution enables precise alignment and controlled standoff heights through the melting and solidification of solder, achieving better manufacturing precision without increasing device complexity.
2Ease of manufacture
If conventional attachment methods are used, then waveguides can be affixed to PCBs, but the cost-effectiveness is poor
Solution Approach 1:
The solder joints serve multiple functions simultaneously: they provide mechanical bonding, ensure electrical connectivity, establish precise alignment, and control standoff heights. This multi-functionality eliminates the need for separate components for each function, reducing overall cost while improving precision.
Solution Approach 2:
The patent merges the alignment features, bonding mechanism, and electrical connection into a single integrated solder joint system. By combining these functions into one process, the manufacturing becomes more cost-effective while achieving superior alignment precision compared to using separate mechanical fasteners or adhesives.
3Reliability
If screws are used for attachment, then mechanical bonding is achieved, but the electrical sealing and heat conduction are insufficient
Solution Approach 1:
The attachment system uses a composite approach combining the PCB substrate, solder pads, waveguide receptacles, and solder joints. This composite structure provides both mechanical bonding strength through the solder joints and electrical sealing by creating a continuous conductive path that seals the interface between the waveguide and PCB.
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 solution achieves a cheap, precise, and secure mechanical bonding while electrically sealing features of the waveguide and components of the PCB, with improved heat conduction through the use of solder within through holes.
Implementation Method 1
applying heat to the PCB or the plastic waveguide effective to melt the solder balls and affix the plastic waveguide to the PCB
Implementation Method 2
improved heat conduction through the use of solder within through holes
Data Source
AI summary
Described herein is a waveguide that is configured to be soldered to a printed circuit board (PCB) via one or more metallic portions disposed thereon. Additionally, the waveguide may have solder disposed within through holes that is configured to conduct heat from one or more components of the PCB when the waveguide is mounted to the PCB. Also described herein is an assembly comprising the waveguide soldered to the PCB via solder between the metallic portions of the waveguide and metallic portions of the PCB. Techniques for producing the waveguide and the assembly are also described herein. By soldering the waveguide to the PCB, an inexpensive, precise, and secure mechanical bonding may be achieved while electrically sealing features of the waveguide and/or components of the PCB. Furthermore, the solder within the through holes allows for better heat conduction through the waveguide.