Satellite Antenna Assembly via Adhesive Bonding
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Solution Overview
Problem
The assembly of satellite antennas using mechanical parts like bosses, screws, and tape can lead to degraded performance and increased size and cost due to the use of substrates like FR-4 for reflector patches, which also adds weight and requires consideration of PCB tolerance and warping.
Innovation Solution
A method involving an assembly fixture with alignment poles, a solid foam spacer, and a reflector patch sheet with a double-sided adhesive carrier film, where the spacer is adhered to the PCB and the reflector patch is aligned and attached without excess material, minimizing mechanical parts and ensuring precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If mechanical parts (bosses, screws, washers, tape) are used to assemble antenna layers, then structural stability is improved, but antenna performance degrades and size increases
Solution Approach 1:
The patent replaces mechanical fastening systems (screws, bosses, washers, tape) with an adhesive bonding system. The adhesive is applied to the reflector patch and bonds it directly to the PCB substrate, eliminating the need for mechanical parts while maintaining structural stability and improving antenna performance by removing interference from mechanical components.
2Strength
If FR-4 substrate material is used for reflector patches, then structural integrity is improved, but cost and weight increase
Solution Approach 1:
The patent changes the material parameter from heavy FR-4 substrate to thin flexible circuit board material. The flexible circuit board maintains sufficient structural integrity for the reflector patch while dramatically reducing weight and cost. The adhesive bonding system compensates for the reduced material strength.
3Stability of the object's composition
If FR-4 substrate is used for reflector patches, then structural stability is improved, but manufacturing complexity increases due to tolerance and warping considerations
Solution Approach 1:
The patent changes the substrate material from rigid FR-4 to thin flexible circuit board material. This material change eliminates warping issues and reduces tolerance sensitivity, significantly simplifying manufacturing while maintaining structural stability through adhesive bonding.
4Stability of the object's composition
If mechanical parts are used for assembly, then structural stability is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive mechanical parts (bosses, screws, washers, tape) with a cost-effective adhesive bonding system. The adhesive is applied in a simple dispensing process, eliminating the need for purchasing, inventory management, and assembly of multiple mechanical components, thereby reducing manufacturing cost while maintaining structural stability.
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
This method reduces material costs, weight, and enhances antenna performance by eliminating the need for mechanical fasteners and ensuring precise alignment of reflector and driver patches, thereby improving the satellite antenna's efficiency and reliability.
Implementation Method 1
pressing the solid foam spacer onto the first layer PCB to adhere the solid foam spacer to the first layer PCB
Implementation Method 2
pressing the reflector patch sheet onto the solid foam spacer to adhere the reflector patch to the solid foam spacer
Data Source
AI summary
A method of assembling a satellite antenna including placing a first layer PCB including an alignment hole on an assembly fixture including an alignment pole, placing a solid foam spacer including an alignment hole on the assembly fixture, pressing the solid foam spacer onto the first layer PCB to adhere the solid foam spacer to the first layer PCB, removing an adhesive carrier film from a reflector patch of a reflector patch sheet including an alignment hole, placing the reflector patch sheet on the assembly feature, pressing the reflector patch sheet onto the solid foam spacer to adhere the reflector patch to the solid foam spacer, and removing a release liner from the top of the reflector patch sheet to remove excess material from the reflector patch sheet.