Low-field Assembled Isolator Gap Sealing
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Solution Overview
Problem
Low-field assembled coaxial isolators are inadequate in preventing signal leakage, failing to meet the increasing demands for microwave circulators and isolators in communication technologies.
Innovation Solution
A low-field assembled isolator design featuring a rectangular body with stacked upper and lower cavities, U-shaped magnetic circuit cover plates, L-shaped magnetic circuit baffles, and mounting members that seal gaps between the cavities, effectively preventing signal leakage by forming a sealed box structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional upper and lower magnetic circuit cover plates are used in low-field assembled coaxial isolators, then the structure is simple, but the signal leakage resistance is poor
Solution Approach 1:
The magnetic circuit cover plate is segmented into a U-shaped cover plate and separate L-shaped baffles. The U-shaped cover plate includes an upper cover plate, vertical plate, and lower cover plate, while the L-shaped baffles are positioned at corners. This segmentation allows each component to seal specific gaps independently, achieving comprehensive signal leakage prevention without requiring a completely redesigned complex structure.
Solution Approach 2:
The L-shaped baffles are nested within the structure formed by the U-shaped cover plate and mounting members. The baffles fit into corners and seal joints between adjacent gaps, while the U-shaped cover plate provides the main sealing framework. This nested arrangement maximizes sealing effectiveness within the existing structural boundaries without significantly increasing overall device complexity.
2Ease of manufacture
If the body is divided into stacked upper and lower cavities, then the assembly is easier, but gaps are formed at joint surfaces causing signal leakage
Solution Approach 1:
The U-shaped magnetic circuit cover plate and L-shaped baffles act as intermediary sealing components between the upper and lower cavities. These intermediaries fill and seal the gaps formed at the joint surfaces of the stacked cavities, preventing signal leakage while preserving the manufacturing and assembly advantages of the stacked cavity structure.
Solution Approach 2:
The magnetic circuit cover plates and baffles function as flexible sealing structures that can adapt to the joint surfaces between cavities. The U-shaped cover plate with its vertical and horizontal segments, combined with L-shaped baffles at corners, creates a flexible sealing system that effectively closes gaps without requiring rigid monolithic construction.
Data Source
AI summary
The present invention discloses a low-field assembled isolator, which includes a rectangular body, wherein the body includes an upper cavity and a lower cavity which are connected in a stacked manner; gaps are formed in four side surfaces of the body through the joint surfaces of the upper cavity and the lower cavity respectively; and the isolator further includes a U-shaped magnetic circuit cover plate and two L-shaped magnetic circuit baffles; and the two L-shaped magnetic circuit baffles are respectively disposed at two corners, away from the vertical plate, of the body so as to seal the joint between two adjacent gaps. The gaps at the joint of the upper cavity and the lower cavity are effectively and fully sealed, thereby effectively preventing signal leakage and improving the performance of the low-field assembled isolator.