A high directivity broadband corrugated horn for W-band gyro-devices

Author

McElhinney, P. ; Donaldson, C.R. ; Liang Zhang ; Wenlong He

Author_Institution

Dept. of Phys., Univ. of Strathclyde, Glasgow, UK

Volume

61

Issue

3

fYear

2013

fDate

3/1/2013 12:00:00 AM

Firstpage

1453

Lastpage

1456

Abstract

A quasi-optical mode converter in the form of a corrugated horn has been designed through numerical simulations, manufactured and experimentally measured for application in W-band gyro-devices. This horn converts a cylindrical TE₁₁ mode into a free space TEM₀₀ mode in a frequency band of 84-104 GHz with a reflection better than 30 dB, a Gaussian coupling efficiency of 98% and directivity of 26.6 dB at 95 GHz. The small beam waist makes such a horn ideal for use with a depressed collector system. The measured results are in excellent agreement with the numerical simulations.

Keywords

gyrotrons; numerical analysis; travelling wave tubes; W-band gyro-device; cylindrical TE₁₁ mode; depressed collector system; free space TEM₀₀ mode; frequency 84 GHz to 104 GHz; gain 26.6 dB; high directivity broadband corrugated horn; numerical simulations; quasioptical mode converter; Bandwidth; Electron beams; Frequency measurement; Microwave measurements; Microwave oscillators; Microwave theory and techniques; Corrugated horn; Gaussian horn; gyro-amplifiers; quasi-optical mode converter;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2012.2228840

Filename

6359767