Non-Reciprocal Circuit Layout Without Substrate Magnet Holes
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Solution Overview
Problem
Conventional non-reciprocal circuits require a hole in the dielectric substrate for mounting a permanent magnet, leading to degradation of substrate strength.
Innovation Solution
A non-reciprocal circuit design featuring a magnetic substrate with a thinner permanent magnet and a ground conductor removal portion on a dielectric substrate, eliminating the need for a hole and allowing for a larger magnet surface area to apply a uniform bias magnetic field, with a cavity smaller than the propagation wavelength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a penetrating hole is provided in the dielectric substrate to dispose the permanent magnet, then the non-reciprocal circuit can be mounted in a dielectric substrate for thickness reduction and cost reduction, but the strength of the dielectric substrate degrades
Solution Approach 1:
The permanent magnet is positioned in a different spatial dimension (above the dielectric substrate) rather than penetrating through it, maintaining substrate integrity while achieving the desired thinness. The magnet is placed on the opposite side of the substrate from the central conductor, eliminating the need for holes through the substrate.
2Ease of manufacture
If a penetrating hole is provided in the dielectric substrate to dispose the permanent magnet, then the non-reciprocal circuit can be mounted in a dielectric substrate, but the frequency band operation is limited
Solution Approach 1:
By changing the position parameter of the permanent magnet from inside the substrate to above the substrate, the cavity size can be reduced and the magnetic field distribution can be optimized, enabling operation across a wider frequency band while maintaining cost-effectiveness through dielectric substrate mounting.
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 circuit operates across a wide frequency band without degrading the dielectric substrate strength, enabling efficient signal transmission and attenuation in specific directions.
Implementation Method 1
a first permanent magnet disposed in such a way as to face the central conductor; a second permanent magnet disposed in such a way as to face the first permanent magnet across the magnetic substrate
Data Source
AI summary
Disclosed is a non-reciprocal circuit characterized in that the non-reciprocal circuit includes: a non-reciprocal circuit element having a magnetic substrate, a ground conductor, a central conductor, input and output terminals, a ground conductor, through holes, a permanent magnet, and a permanent magnet; and a dielectric substrate having input and output terminals, a ground conductor, a ground conductor removal portion, and solder connection portions, the ground conductor removal portion is disposed at a position at which the ground conductor removal portion faces the permanent magnet, on the dielectric substrate, and the permanent magnet has a thickness thinner than the heights of the solder connection portions.