Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Broadband High Frequency Faraday Isolator

An isolator and high-frequency technology, applied in the field of broadband high-frequency Faraday isolators, can solve problems such as low isolation, difficulty in meeting device bandwidth, isolation and application frequency requirements, narrow bandwidth of isolators, etc., and achieve high application frequency Effect

Active Publication Date: 2021-03-16
中国电子科技集团公司第九研究所
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional ferrite isolators have narrow bandwidth and low isolation, and the device application frequency is limited by the saturation magnetization of ferrite, which makes it difficult to meet the requirements of some systems for device bandwidth, isolation and application frequency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Broadband High Frequency Faraday Isolator
  • A Broadband High Frequency Faraday Isolator
  • A Broadband High Frequency Faraday Isolator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: see figure 1 , a broadband high-frequency Faraday isolator, including a cavity and a permanent magnet 5, the cavity is composed of a rectangular waveguide 1, a circular waveguide 4 and a twisted waveguide 9 arranged coaxially in sequence, wherein the rectangular waveguide 1 is the input end, and the twisted waveguide The waveguide 9 is an output end; the twisted waveguide 9 is a 45° twisted waveguide, and its two ends are relatively rotated by 45°;

[0026] The circular waveguide 4 adopts an over-molded design, its size is larger than that of the standard circular waveguide at the operating frequency, and the inner wall is covered with an absorber 7, which is used to absorb higher-order modes;

[0027] A ferrite 6 is coaxially arranged in the circular waveguide 4, and matching ceramics 2 are coaxially provided at both ends of the ferrite 6, and the matching ceramics 2 are cylindrical and protrude from both ends of the circular waveguide 4 respectively. , ...

Embodiment 2

[0035] Embodiment 2: This embodiment is further improved on the basis of Embodiment 1, wherein, the circular waveguide 4 is provided with a supporting body 3 supporting a ferrite 6 and a matching ceramic 2, and the supporting body 3 is located in a circular The rings at both ends of the waveguide 4, the two ends of the matching ceramic 2 pass through the middle of the support body 3 and are supported and positioned by the support body 3. The support body 3 is made of organic glass or resin material. The absorber 7 has a loss tangent of magnetic loss and electric loss greater than 0.1 in the application frequency band, and the thickness of the absorber 7 is 0.1-0.3mm. The surfaces of the circular waveguide 4, the rectangular waveguide 1 and the twisted waveguide 9 are gold-plated.

Embodiment 3

[0036] Embodiment 3: On the basis of the structure of Embodiment 1 and 2, we provide a specific embodiment, corresponding Figure 2-Figure 3 , the application frequency band of the Faraday isolator in this embodiment is 40-60 GHz, wherein the ferrite 6 is a ferrite material with a saturation magnetization of 5200 Gs and a ferromagnetic resonance linewidth of 90 Oe. Insertion loss, isolation, return loss and standing wave of the Faraday isolator of this embodiment are such as figure 2 , image 3 shown. It can be seen from the figure that the working bandwidth of the product in this embodiment is full, the transmission loss is less than 1.5dB, the isolation is greater than 22 dB, and the standing wave ratio is less than 1.45.

[0037] Table 1 shows the performance comparison between Embodiment 3 and the traditional waveguide isolator. The frequency used by the traditional stripline and microstrip isolators is relatively low, and the comparison is not included here. As shown ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
isolationaaaaaaaaaa
isolationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a broadband high-frequency Faraday isolator, belonging to the technical field of microwave / millimeter wave devices, comprising a coaxial cavity composed of a circular waveguide, a rectangular waveguide and a twisted waveguide; a coaxial ferrite is arranged in the circular waveguide cavity; There are matching ceramics on both sides of the oxygen body; a resistance layer is set in the middle of the matching ceramics on both sides; the inside of the circular waveguide is covered with a layer of high-loss absorber; the permanent magnet is on the outside of the circular waveguide; plexiglass or resin is used as ferrite and ceramics support. The invention utilizes the Faraday rotation effect to realize full frequency band high isolation of the ferrite isolator. Compared with traditional ferrite isolators, such as waveguide, stripline and microstrip isolators, its advantage is that it can realize the high isolation of the whole frequency band of the device, and the application frequency is higher, and the frequency is not limited by the limited saturation magnetization of ferrite materials. limit.

Description

technical field [0001] The invention relates to an isolator, in particular to a broadband high-frequency Faraday isolator. Background technique [0002] Ferrite isolator is one of the passive devices widely used in modern microwave / millimeter wave systems. It mainly has two ports, which have a small loss in the forward transmission direction and a large loss in the reverse transmission direction. loss, which makes it have the characteristics of one-way transmission. In the system, it is mainly used for the isolation of source and signal, the isolation of power amplifier and load, the isolation of improving power synthesis circuit, etc., and it plays the role of isolating reflected signal and protecting source. [0003] Traditional ferrite isolators have narrow bandwidth and low isolation, and the device application frequency is limited by the saturation magnetization of ferrite, which makes it difficult to meet the requirements of some systems for device bandwidth, isolatio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/375
CPCH01P1/375
Inventor 蒋运石鲜聪任仕晶王斌孔伟
Owner 中国电子科技集团公司第九研究所
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com