Waveguide Antenna Feed Mounting PCB Mechanical Stress
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Solution Overview
Problem
Millimeter-wave communication systems face challenges in achieving mechanical integrity and assembly accuracy, particularly in connecting waveguides and Printed Circuit Boards (PCBs), which often result in mechanical stress on components.
Innovation Solution
A millimeter-wave communication system design where a waveguide serves as both a structural component and a housing for electronic elements, with a PCB mechanically fixed to the waveguide, allowing only the waveguide to connect the PCB to the system's box, thereby relieving mechanical stress and ensuring accurate alignment and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If typical mechanical design and assembly solutions are used to connect waveguides and PCBs, then mechanical connection is achieved, but mechanical stress is created on PCBs and electrical connectors
Solution Approach 1:
The waveguide serves as an intermediary structural element that mechanically connects the PCB to the box housing while maintaining electrical isolation. By making the waveguide the sole mechanical connection point and decoupling other electrical connections (Ethernet connector, power connector) from mechanical mounting to the PCB, the design transfers mechanical stress away from the PCB and concentrates it on the waveguide structure which is better suited to handle such loads.
2Stability of the object's composition
If multiple mechanical connections are made between PCB and box, then mechanical stability is improved, but assembly accuracy and alignment precision deteriorate
Solution Approach 1:
The design extracts the mechanical connection function from multiple mounting points and consolidates it to a single location - the waveguide interface. By removing mechanical attachment requirements from other PCB connections (Ethernet connector, power connector, antenna connector), the system achieves mechanical stability through one precisely positioned waveguide interface rather than multiple connections that would compromise alignment accuracy.
3Strength
If waveguide is used as structural housing element, then mechanical integrity is improved, but device complexity increases
Solution Approach 1:
The waveguide structure is designed to serve multiple functions simultaneously: it acts as both the electromagnetic wave transmission path and the primary mechanical structural element for mounting the PCB. This multi-functionality eliminates the need for separate structural supports, brackets, or mounting frames, thereby improving mechanical integrity without proportionally increasing overall device complexity.
Data Source
AI summary
A millimeter-wave communication system includes (i) an antenna comprising a reflector and a feed, the feed comprising a first waveguide, (ii) a Printed Circuit Board (PCB) comprising a modem, a processor, and a radio receiver coupled with a probe, the PCB is mechanically fixed to one end of the feed, such that the PCB is mechanically held by the feed, and the probe is located in a position allowing reception of millimeter-waves exiting the first waveguide towards the PCB, (iii) an Ethernet connector, (iv) at least one flexible cable operative to carry Ethernet signals between the first PCB and the Ethernet connector, and (v) a box housing the PCB and the Ethernet connector. The Ethernet connector and the feed are mechanically fixed to the box, and the only mechanical connection between the PCB and the box is via the feed.