Over-mode circular waveguide broadband directional coupler and design method thereof

A technology of over-molded circular waveguide and directional coupler, which is applied in the direction of waveguide devices, electrical components, connecting devices, etc., and can solve problems such as poor directivity or isolation, narrow operating frequency band, and large fluctuations in in-band coupling. Achieve the effects of small fluctuations in coupling degree, wide operating frequency, improved operating bandwidth and isolation

Active Publication Date: 2015-04-08
UNIV OF ELECTRONIC SCI & TECH OF CHINA
View PDF2 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the narrow working frequency band of the traditional overmode circular waveguide directional coupler (the relative bandwidth is generally less than 10%), the large fluctuation of the coupling degree in the band (the fluctuation of the coupling degree between some freque

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
  • Over-mode circular waveguide broadband directional coupler and design method thereof
  • Over-mode circular waveguide broadband directional coupler and design method thereof
  • Over-mode circular waveguide broadband directional coupler and design method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0031] This embodiment provides an overmodulated circular waveguide broadband directional coupler working in the Ka band and TE01 mode, and its technical index requirements are as follows:

[0032] Main waveguide working mode: TE 01 mold;

[0033] Working frequency band: Ka band, namely 26.5GHz-40GHz;

[0034] Standard rectangular waveguide model: BJ320, wide side size: 7.112 mm, narrow side size: 3.556 mm;

[0035] Coupling degree: -40dB; Isolation degree (directivity): 20dB; In-band coupling degree fluctuation: ≤±1dB.

[0036] The structure of the overmode circular waveguide broadband directional coupler provided by this embodiment is as follows: figure 1 , figure 2 and image 3 As shown, the main structure and its specific dimensions are as follows:

[0037] 1 is an overmolded circular waveguide with an inner radius of 16 mm and a length of 220 mm;

[0038] 2 is a non-standard overmode rectangular waveguide, with a wide side of 13.11 mm and a narrow side of 3.556 mm...

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
Bending angleaaaaaaaaaa
Login to view more

Abstract

The invention provides a novel over-mode circular waveguide broadband directional coupler and a design method thereof. According to the over-mode circular waveguide broadband directional coupler and the design method thereof, a standard rectangular waveguide in the traditional over-mode circular waveguide directional coupler is replaced with a non-standard over-mode rectangular waveguide; the cutoff wave number of a basic mode TE10 of the non-standard over-mode rectangular waveguide is changed through adjusting the size of the non-standard over-mode rectangular waveguide, and the cutoff wave number of the basic mode TE10 of the non-standard over-mode rectangular waveguide is enabled to be the same as that of a working mode TEmn in an over-mode circular waveguide, so that the propagation constant of the TE10 at any frequency point is the same as that of the TEmn, then, forward waves of the coupler can meet equidirectional superposing conditions at any frequency point, and the aims of expanding the working bandwidth of the over-mode circular waveguide directional coupler and reducing in-band coupling degree fluctuation are achieved.

Description

technical field [0001] The invention relates to the technical field of microwave and millimeter wave devices, in particular to an over-modulated circular waveguide broadband output directional coupler and a design method thereof. Background technique [0002] The directional coupler is a microwave and millimeter-wave device widely used in the field of microwave and millimeter-wave measurement. Its main function is to accurately sample the high-power signals transmitted in the microwave and millimeter-wave systems, and couple a small part Wave signals, in order to perform time-domain envelope monitoring, power measurement, spectrum measurement, etc. on high-power signals transmitted in microwave and millimeter wave systems through measuring instruments such as oscilloscopes, small power meters, and spectrum analyzers. [0003] Most traditional high-power microwave systems use rectangular waveguides as transmission lines, and the matching directional couplers generally use rec...

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
IPC IPC(8): H01P5/18
Inventor 徐勇罗勇夏建波王丽邓学王建勋嫣然成永东胥麟
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap