Microwave Gyromagnetic Circulator Pin Structure for Stable Miniaturization
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Solution Overview
Problem
Existing microwave gyromagnetic circulators face challenges in miniaturization, as it often leads to a decrease in bandwidth and structural instability due to direct contact between the central conductor and the medium ferrule.
Innovation Solution
A micro-subminiature microwave gyromagnetic circulator is designed with a housing, compensation sheet, magnets, iron sheets, ceramic ring ferrites, a central conductor, and a medium ferrule. The central conductor is Y-shaped with through-holes matching pins on the medium ferrule, and high dielectric constant BiCaVIG ferrites are used. A tin-containing tank on the pin increases contact area and forms a clamping structure to enhance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of the microwave gyromagnetic circulator is reduced for miniaturization, then the device becomes more compact and cost-effective, but the bandwidth of the device decreases
Solution Approach 1:
The patent introduces ferrite materials with high dielectric constants (≥30) to replace conventional ferrite materials. This parameter change in material properties allows the circulator to achieve miniaturization while maintaining bandwidth performance, as the high dielectric constant enables compact dimensions without sacrificing operational characteristics
Solution Approach 2:
The patent employs composite structures combining high dielectric constant ferrite materials with specific conductor geometries (Y-shaped central conductor with optimized dimensions). This composite approach enables simultaneous achievement of small size and adequate bandwidth by leveraging the complementary properties of different materials and structures
2Device complexity
If the central conductor and medium ferrule are directly contacted to achieve conduction in miniature circulators, then the structure becomes simpler, but the structural stability deteriorates and disconnection occurs easily
Solution Approach 1:
The patent introduces a tin-containing tank as an intermediary component between the central conductor and the medium ferrule. This tin-containing tank serves as both a mechanical connector and an electrical conductor, providing reliable physical and electrical connection while preventing direct contact between the central conductor and medium ferrule, thereby eliminating the disconnection problem
Solution Approach 2:
The tin-containing tank is designed with sufficient thickness and mechanical strength to preemptively prevent disconnection issues. By providing a robust intermediate connection layer before any potential failure can occur, the design ensures long-term structural stability and reliable conduction in the miniature circulator
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
The design ensures that the bandwidth of the circulator remains unchanged despite size reduction, and the structural stability and conduction stability are improved, reducing the risk of disconnection and enhancing operational reliability.
Implementation Method 1
the dielectric constant of the first ceramic ring ferrite and the dielectric constant of the second ceramic ring ferrite are respectively greater than or equal to 30; the first ferrite and the second ferrite are respectively BiCaVIG ferrites
Implementation Method 2
the pins and the feet are welded at the through-holes via solder paste, the connection of the extension and the fixed portion is provided with a tin-containing tank for receiving part of the solder paste
Implementation Method 3
a housing and a compensation sheet, a first magnet, a first iron sheet, a first ceramic ring ferrite, a central conductor, a second ceramic ring ferrite, a second iron sheet, a second magnet and a medium ferrule
Data Source
AI summary
The present invention relates to a micro-subminiature microwave gyromagnetic circulator comprising a housing and a first ceramic ring ferrite, a central conductor, a second ceramic ring ferrite and a medium ferrule mounted inside the housing; the medium ferrule comprises a pin, and a foot of the central conductor is provided with a through-hole matching the pin; the pin comprises an extension and a fixed portion which are connected, wherein the diameter of the extension is smaller than the diameter of the fixed portion, the pins and the feet are welded at the through-holes via solder paste, and a tin-containing tank is provided at the connection between the extension and the fixed portion. The microwave gyromagnetic circulator can be micro-subminiature without decreasing bandwidth. The structure stability and conduction stability of the microwave gyromagnetic circulator are improved by welding the central conductor to the pin and providing a tin-containing tank on pin.