Modular Tapered Slot Antenna Feed Structure for Repeatable Feed Gaps
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Solution Overview
Problem
Conventional tapered slot antennas require additional structural elements like support brackets and set screws to maintain the feed gap, which complicates the swapping of blades, tuning, and can lead to performance disruptions.
Innovation Solution
A modular design with a 'lock and key' support system, comprising upper and lower blades with locking flanges, allows for easy assembly and swapping while maintaining a fixed feed gap, eliminating the need for set screws and support brackets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If support brackets and set screws are used to maintain the feed gap, then the antenna blades can be held in place, but the device complexity increases and blade swapping becomes difficult
Solution Approach 1:
The antenna system is divided into separate modular components: a first antenna blade, a second antenna blade, and a feed structure. The feed structure itself is segmented into a housing and a feed element that can move independently. This segmentation allows each component to be optimized separately and facilitates easy assembly and swapping of blades without affecting the overall feed gap stability.
Solution Approach 2:
The feed structure housing acts as an intermediary component between the two antenna blades. It provides a stable reference frame and contains the feed element that maintains the precise feed gap distance. This intermediary structure eliminates the need for complex external support brackets and set screws, as the housing itself provides the necessary mechanical support and positioning.
2Manufacturing precision
If set screws are used to fine tune the antenna performance, then the feed gap can be adjusted, but the manufacturing time and tuning iterations increase
Solution Approach 1:
The feed element is pre-positioned within the feed structure housing at the precise feed gap distance during manufacturing. This preliminary positioning ensures that when the antenna blades are assembled with the feed structure, the feed gap is already at the optimal dimension without requiring subsequent tuning iterations. The feed element may include pre-formed engagement features that automatically align with corresponding features on the antenna blades.
Solution Approach 2:
The feed structure is designed to self-align and self-position the feed element at the correct location relative to the antenna blades. The housing may include guide features, alignment pins, or self-centering mechanisms that automatically ensure proper positioning during assembly, eliminating the need for manual adjustment with set screws and reducing tuning time significantly.
3Strength
If conventional support brackets are used, then the antenna blades can be supported, but the productivity decreases due to repetitive tuning and testing
Solution Approach 1:
The support function and the feed gap maintenance function are merged into a single integrated feed structure. The housing provides mechanical support for both antenna blades while simultaneously maintaining the precise feed gap distance. This consolidation eliminates the need for separate support brackets and reduces the number of components that require assembly and tuning, thereby improving productivity and reducing repetitive testing.
Solution Approach 2:
The feed structure housing serves multiple functions: it supports the first antenna blade, supports the second antenna blade, maintains the feed gap distance, and provides a mounting interface for the feed element. This multi-functional design replaces multiple separate components (support brackets, spacers, adjustment mechanisms) with a single universal structure that performs all necessary functions, streamlining the design and manufacturing process.
4Manufacturing precision
If set screws are used to establish the feed gap, then the gap can be fine-tuned, but reliability decreases due to potential loosening
Solution Approach 1:
The mechanical adjustment system using set screws is replaced with a fixed positional system. The feed element is positioned at the precise feed gap distance through the housing structure, which may use interference fits, press fits, adhesive bonding, or rigid mechanical constraints. This substitution eliminates the moving parts and adjustment mechanisms that can loosen over time, ensuring long-term reliability and consistency of the feed gap dimension without sacrificing manufacturing precision.
Data Source
AI summary
Embodiments of the present invention are directed to a modular, lock and key, tapered slot antenna feed structure, antenna kits including same and methods of use. The invention allows for quick assembly and separation of opposed blades. The invention provides a repeatable tight tolerance feed gap during every assembly. Components of the tapered slot antenna feed structure may be additively manufactured and selectively plated.