3D Molded RF Transition Assembly for Antenna Arrays
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Solution Overview
Problem
Next-generation large area multifunction active arrays for space and airborne antennas require lighter, lower-cost, and more conformal RF transmission lines that can efficiently transition between different types of transmission lines, such as microstrip, dielectric stripline, and suspended substrate stripline, to accommodate varying antenna structures.
Innovation Solution
A three-dimensional molded RF transition assembly comprising flexible layers with microstrip, dielectric stripline, and suspended substrate stripline sections, utilizing plated vias and air channels to facilitate seamless signal transmission, with layers made from liquid crystal polymer (LCP) material for reduced weight and improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional multilayer active panel array architecture is used, then structural strength and rigidity are improved, but weight and cost increase
Solution Approach 1:
The patent uses flexible LCP substrates and thin film layers to create a lightweight antenna structure that maintains structural integrity through layered construction. The flexible layers replace traditional rigid multilayer panels, achieving weight reduction while preserving mechanical strength through the distributed layered architecture.
Solution Approach 2:
The patent employs composite material construction by combining LCP substrates with metal trace patterns and dielectric layers. This composite approach allows the structure to achieve both lightweight properties from the polymer substrate and mechanical strength from the distributed layered composite architecture.
2Adaptability or versatility
If transmission line structure varies at different antenna locations, then adaptability to antenna structure is improved, but device complexity increases
Solution Approach 1:
The patent divides the transmission line system into distinct segments: microstrip transmission lines in the first section, dielectric stripline in the second section, and suspended substrate stripline in the third section. Each segment is optimized for its specific function and can be independently designed and manufactured, reducing overall system complexity while maintaining adaptability.
Solution Approach 2:
The patent creates a universal transmission line system that can adapt to different antenna structures by incorporating multiple transmission line types within a single integrated assembly. The transition structure serves multiple functions: signal transmission, impedance matching, and structural support, reducing the need for separate components.
3Reliability
If RF signal transitions between different transmission line types are implemented, then signal transmission efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent incorporates transition sections between different transmission line types that are pre-designed and pre-manufactured as integral parts of the LCP substrate assembly. The transitions from microstrip to dielectric stripline to suspended substrate stripline are built-in during the manufacturing process, eliminating the need for post-assembly alignment and reducing precision requirements during final assembly.
Data Source
AI summary
A radio frequency (RF) transition for a three dimensional molded RF structure is provided. In one embodiment, the invention relates to a radio frequency (RF) transition for an RF structure, the RF transition includes an assembly having a first flexible layer, a second flexible layer, and a third flexible layer, wherein a first section of the assembly includes a microstrip transmission line, wherein a second section of the assembly includes a dielectric stripline transmission line, and wherein a third section of the assembly includes a suspended substrate stripline transmission line.