Non-reciprocal circuit element

Abstract

The invention provides a nonreciprocal circuit element, comprising a ferrite component, a permanent magnet and a magnetic component, wherein, the ferrite component comprises a central electrode part inside which a plurality of electrode wires used as inductive elements are intersected at predetermined angles without electric contact; the ferrite component also comprises a matching capacitor electrode; the central electrode part and the matching capacitor electrode are formed on the surface of the ferrite component; the permanent magnet imposes a direct current magnetic field on the intersected position of the central electrode part; the magnetic part and any of the upper and the lower surfaces of the ferrite component form an integrated body; the magnetic part is made from magnetic material with the magnetic permeability bigger than that of the ferrite component.

Description

technical field [0001] The present invention relates to microwave electronic devices, and in particular to non-reciprocal circuit elements such as single-sided waveguides or gyrators. Background technique [0002] Lumped constant single-sided waveguides and gyrators for microwave bands have the ability to pass signals only in the desired direction of transmission and prevent them from passing in the opposite direction. For example, such devices are suitable for use in mobile communication devices such as portable telephone systems. [0003] Figure 15 and 16 An example of such a gyrator is shown. Figure 16 and 15 The configuration of the illustrated gyrator 50 is as follows. A resin block 53 embedded with a terminal 57 is placed on the lower surface of the ferrite member 52 . Three central electrodes 51a, 51b, 51c and matching capacitor electrodes (not shown) are contained in a ferrite part. And the permanent magnet 54 is placed on the upper surface of the ferrite par...

AI Technical Summary

Problems solved by technology

[0009] And according to common non-reciprocal circuit elements, the air layer between the resin box 53 and the lower box 56 will generate a diamagnetic field, which affects the uniformity of the magnetic field distribution

[0010] It is also foreseeable that the presence of an air layer will cause magnetic field leakage

The leakage of the magnetic field will also affect the surrounding circuit components

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