Substituted YIG Ferrite Non-Reciprocal Circuit Element
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Solution Overview
Problem
Non-reciprocal circuit elements, such as isolators and circulators, face challenges in improving electric power handling capability and reducing leakage power between adjacent channels while balancing noise reduction and insertion loss.
Innovation Solution
The use of YIG ferrites with specific substitutions, such as Ho, Dy, Gd, and Co, in the ferrite material to enhance electric power resistance and reduce leakage power, and optimizing conductor configurations to manage noise and insertion loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional ferrite materials are used in non-reciprocal circuit elements, then the device structure can be kept simple, but the electric power handling capability is insufficient and leakage power between adjacent channels increases
Solution Approach 1:
The patent applies parameter changes by substituting specific elements (Ho, Dy, Gd) into the YIG ferrite material composition to modify its magnetic and electrical properties. This chemical parameter change enables the ferrite to achieve higher electric power handling capability while reducing adjacent channel leakage power, resolving the contradiction between power handling and energy loss.
Solution Approach 2:
The patent uses composite materials by creating a substituted YIG ferrite compound that combines yttrium iron garnet with rare earth elements (Ho, Dy, Gd). This composite material structure provides both high electric power handling capability and reduced leakage power, simultaneously addressing both requirements that conventional single-material ferrites cannot satisfy.
2Volume of moving object
If the non-reciprocal circuit element size is reduced to meet miniaturization requirements, then the device can be integrated into compact wireless apparatus, but the electric power handling capability deteriorates
Solution Approach 1:
The patent applies parameter changes through material composition optimization, substituting rare earth elements into YIG ferrite to enhance the power handling capability per unit volume. This allows the device to maintain high power handling capability even when miniaturized, resolving the contradiction between small size and power capability.
3Object-affected harmful factors
If measures are taken to reduce noise between adjacent ports, then signal quality improves, but insertion loss increases
Solution Approach 1:
The patent applies parameter changes by optimizing the ferrite material composition with specific rare earth element substitutions, which modifies the magnetic resonance characteristics and noise figure. This enables simultaneous reduction of noise between adjacent ports and control of insertion loss through precise material parameter tuning.
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 proposed solution effectively improves electric power handling, reduces leakage power, and balances noise reduction and insertion loss, enhancing the performance of non-reciprocal circuit elements.
Implementation Method 1
a YIG ferrite; and a plurality of conductors disposed on the YIG ferrite and intersecting each other in an insulated state, wherein a part of Y of the YIG ferrite is substituted with at least any one element of Ho, Dy, and Gd or a part of Fe of the YIG ferrite is substituted with Co
Implementation Method 2
a non-reciprocal circuit element such as an isolator or a circulator has characteristics of transmitting signals only in a specific direction and not transmitting signals in the opposite direction
Data Source
AI summary
In a non-reciprocal circuit element, electric power handling capability is improved, and leakage power between adjacent channels is reduced. In addition, balance is taken between reduction of noise between adjacent ports and an increase in insertion loss. A non-reciprocal circuit element includes a YIG ferrite (10) and a plurality of conductors (15) disposed on the YIG ferrite (10) and intersecting each other in an insulated state. A part of Y of the YIG ferrite (10) is substituted with at least any one element of Ho, Dy, and Gd, or a part of Fe of the YIG ferrite (10) is substituted with Co.