Design of a composite multi-aperture array circular directional coupler for high power gyrotron

Author

Liu, Guo ; Luo, Yong ; Wang, Jian-xun

Author_Institution

Sch. of Phys. Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2012

fDate

19-20 April 2012

Firstpage

1

Lastpage

4

Abstract

A composite multi-aperture array circular-rectangular waveguide directional coupler is designed for measuring gyrotron output power and monitoring spectrum with loose-coupling theory. The coupling characteristics of 20-aperture directional coupler with the distribution of Chebychev-equal radius are performed by theoretical analysis and CST microwave studio (CST-MWS) simulations. Results indicate that the composite distribution possesses both the advantages of smaller ripple, higher directivity and wider bandwidth. Simultaneously, we also discover that increasing the thickness and declining the radius of the apertures will be beneficial for weakening the ripple of coupling coefficient. In addition, proper rectangular waveguide size and distance between the last and penultimate aperture of the array can improve the directivity effectively.

Keywords

Chebyshev approximation; directional couplers; gyrotrons; rectangular waveguides; CST Microwave Studio; CST-MWS simulation; Chebychev-equal radius; composite distribution; composite multiaperture array circular-rectangular waveguide directional coupler; coupling characteristics; coupling coefficient; gyrotron output power measurement; high power gyrotron; high power microwave; loose-coupling theory; penultimate aperture; rectangular waveguide distance; rectangular waveguide size; ripple; spectrum monitoring; Apertures; Arrays; Couplings; Directional couplers; Gyrotrons; Power measurement; Rectangular waveguides; composite multi-aperture array; directional coupler; gyrotron; high power microwave (HPM);

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Millimeter Wave Circuits and System Technology (MMWCST), 2012 International Workshop on

Conference_Location

Chengdu

Print_ISBN

978-1-4673-1893-8

Type

conf

DOI

10.1109/MMWCST.2012.6238121

Filename

6238121