Miniature isolator

A technology of isolators and circulators, applied in waveguide-type devices, electrical components, circuits, etc., can solve problems such as bandwidth reduction, shorten the delivery cycle, speed up mass production, and achieve the effect of small size
CN101834329BActive Publication Date: 2013-04-17西安雷讯电子科技有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
西安雷讯电子科技有限责任公司
Publication Date
2013-04-17

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Abstract

The invention discloses a miniature isolator which comprises a three-port circulator connected with loads at ports. The three-port circulator comprises an external cavity, a garnet disc, samarium-cobalt alloy permanent-magnetic material and Y-shaped center conductors, wherein the samarium-cobalt alloy permanent-magnetic material is arranged on the garnet disc and contains a bias magnetic field and the Y-shaped center conductors are distributed between the samarium-cobalt alloy permanent-magnetic material and the garnet disc. The equivalent circuits of the three-port circulator are three LC impedance matching circuits, and the LC impedance matching circuits are respectively connected with the three ports of the three-port circulator and respectively consist of an inductor L and a capacitorC. The three ports of the three-port circulator are respectively connected with an LC parallel resonance circuit which is formed by connecting an inductor Li and a capacitor Ci in parallel. The impedance of the three LC parallel resonance circuits respectively counteracts the impedance of the three LC impedance matching circuits. The invention has the advantages of simple structure, small volume,convenient processing and manufacture, batch production, novel and reasonable design and good use effect and can ensure enough bandwidth while reducing the size of the isolator greatly.
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Description

technical field

[0001] The invention relates to an isolator applied to communication equipment such as mobile phones, in particular to a miniaturized isolator. Background technique

[0002] With the development trend of miniaturization of mobile phones, the reduction of their weight and thickness is getting faster and faster, which causes the miniaturization of isolators used in mobile phones to accelerate. 5mm square isolators have been widely used abroad, and 4mm, 3.5mm or even 3.0mm square isolators have also begun to appear. At the same time, not only isolator designers pay attention to the miniaturization of isolators in the actual manufacturing process, but also mobile phone designers. However, it is well known that the miniaturization of the isolator will inevitably affect the bandwidth, so the miniaturization of the isolator and the bandwidth cannot be achieved at the same time, and it is difficult to improve both at the same time.

[0003] The lumped parameter iso...

Claims

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