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Low-insertion-loss self-biasing microstrip circulator based on magnetic nanowire arrays

A nanowire array and insertion loss technology, which is applied to waveguide devices, electrical components, circuits, etc., can solve problems such as large insertion loss, achieve low insertion loss, reduce dielectric constant, and high isolation

Inactive Publication Date: 2016-02-03
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The existing circulators designed based on nanowire soft magnetic materials all adopt a single-layer nanowire array structure, which has a large insertion loss due to the limitations of the nanowire array itself.

Method used

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  • Low-insertion-loss self-biasing microstrip circulator based on magnetic nanowire arrays
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  • Low-insertion-loss self-biasing microstrip circulator based on magnetic nanowire arrays

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Embodiment

[0023] This embodiment includes four major parts: a microstrip Y-junction matching line 1, a hexagonal prism dielectric layer with a cylindrical through hole in the center, a metal bottom electrode 3, and a multilayer cylindrical central junction 4. The center junction is a multilayer structure, the upper and lower layers are insulating layers, and the middle is three layers of Fe nanowire array layers deposited with a porous alumina template. The three layers of array layers are separated by two air layers, and there is volume in the air layer. Ignored spacers to support the entire structure.

[0024] The nanowires used in the present invention are prepared by depositing Fe nanowires in a porous alumina template with a thickness of 70um, a nanopore diameter of about 80nm, and a porosity ratio of 60% by electrochemical deposition. The length of the nanowires is measured to be about 60um, remanence (4πMr) is 4200gauss, high permeability frequency spectrum and high dielectric const...

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Abstract

The invention provides a low-insertion-loss self-biasing microstrip circulator based on magnetic nanowire arrays, and belongs to the field of microwave passive devices. The low-insertion-loss self-biasing microstrip circulator comprises a microstrip Y-junction matching wire, a hexagonal prism dielectric layer of which the center is provided with a cylinder through hole, a metal bottom electrode and a cylinder center junction. The low-insertion-loss self-biasing microstrip circulator is characterized in that the cylinder center junction comprises a top layer insulating layer and a bottom layer insulating layer, and at least two nanowire array layers which are arranged between the top layer insulating layer and the bottom layer insulating layer. An air layer is arranged between the adjacent nanowire array layers. Three magnetic nanowire array layers formed by deposition of porous alumina templates are adopted to act as the center junction of the circulator, and the layers are mutually separated by the air layers so that the objective of reducing the overall dielectric constant of the center junction is realized, and the circulator has low insertion loss and high degree of isolation in microwave frequency band X-band.

Description

Technical field [0001] The invention belongs to the field of microwave passive devices, and specifically relates to a self-biased, low insertion loss microwave circulator design that can be applied to microwave integrated circuits. Background technique [0002] The circulator is one of the indispensable devices in the microwave circuit system. It is a multi-port non-reciprocal device with directional transmission characteristics. The development direction of the circulator is miniaturization, high frequency band, and broadband. Traditional ferrite circulators cannot be self-biased, and usually require an external permanent magnet to provide a bias field, which severely restricts the development of miniaturization of the circulator. Therefore, magnetic materials that have a large anisotropy field and a large remanence ratio and can achieve self-bias have received widespread attention. Among them, the soft magnetic nanowire material prepared based on nanotechnology has become a n...

Claims

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Application Information

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IPC IPC(8): H01P1/383
Inventor 韩满贵涂宽周辉
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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