A novel cylindrical TE2,1 mode converter

D. A. Constable, X. S. Fampris, K. Ronald, W. He, C. G. Whyte, C. W. Robertson

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A novel, compact arrangement for Ka-band mode couplers, which convert a rectangular waveguide TE1,0 to cylindrical waveguide TE2,1 mode, has been designed, constructed, and tested. The design features a set of longitudinal slots, positioned in regions of negligible current flow for the TE2,1 mode, allowing its propagation to be preferentially favored, by suppression of the fundamental TE1,1 mode. Numerical simulations and experimental measurements display good agreement, showing transmission of the intended TE2,1 mode at levels of better than -5 dB, from a frequency of similar to 37.5 to 41 GHz. Subsequent farfield measurements confirm the presence of the TE2,1 mode, demonstrating good agreement when compared with analytical expectations. Such a device would be an ideal candidate for an application where mode purity, bandwidth, and ease of construction are of primary importance and where the transmission efficiency is of limited concern. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3480994]
LanguageEnglish
Pages094702
Number of pages10
JournalReview of Scientific Instruments
Volume81
Issue number9
DOIs
Publication statusPublished - 17 Sep 2010

Fingerprint

converters
Circular waveguides
Rectangular waveguides
Bandwidth
Computer simulation
transmission efficiency
rectangular waveguides
slots
couplers
purity
retarding
waveguides
bandwidth
propagation
simulation

Keywords

  • circular waveguides
  • rectangular waveguides
  • optical waveguides
  • convertors

Cite this

Constable, D. A. ; Fampris, X. S. ; Ronald, K. ; He, W. ; Whyte, C. G. ; Robertson, C. W. / A novel cylindrical TE2,1 mode converter. In: Review of Scientific Instruments. 2010 ; Vol. 81, No. 9. pp. 094702.
@article{c15410cd6b2d4014aa2f26f089c2e168,
title = "A novel cylindrical TE2,1 mode converter",
abstract = "A novel, compact arrangement for Ka-band mode couplers, which convert a rectangular waveguide TE1,0 to cylindrical waveguide TE2,1 mode, has been designed, constructed, and tested. The design features a set of longitudinal slots, positioned in regions of negligible current flow for the TE2,1 mode, allowing its propagation to be preferentially favored, by suppression of the fundamental TE1,1 mode. Numerical simulations and experimental measurements display good agreement, showing transmission of the intended TE2,1 mode at levels of better than -5 dB, from a frequency of similar to 37.5 to 41 GHz. Subsequent farfield measurements confirm the presence of the TE2,1 mode, demonstrating good agreement when compared with analytical expectations. Such a device would be an ideal candidate for an application where mode purity, bandwidth, and ease of construction are of primary importance and where the transmission efficiency is of limited concern. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3480994]",
keywords = "circular waveguides, rectangular waveguides, optical waveguides, convertors",
author = "Constable, {D. A.} and Fampris, {X. S.} and K. Ronald and W. He and Whyte, {C. G.} and Robertson, {C. W.}",
year = "2010",
month = "9",
day = "17",
doi = "10.1063/1.3480994",
language = "English",
volume = "81",
pages = "094702",
journal = "Review of Scientific Instruments",
issn = "0034-6748",
number = "9",

}

A novel cylindrical TE2,1 mode converter. / Constable, D. A.; Fampris, X. S.; Ronald, K.; He, W.; Whyte, C. G.; Robertson, C. W.

In: Review of Scientific Instruments, Vol. 81, No. 9, 17.09.2010, p. 094702.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A novel cylindrical TE2,1 mode converter

AU - Constable, D. A.

AU - Fampris, X. S.

AU - Ronald, K.

AU - He, W.

AU - Whyte, C. G.

AU - Robertson, C. W.

PY - 2010/9/17

Y1 - 2010/9/17

N2 - A novel, compact arrangement for Ka-band mode couplers, which convert a rectangular waveguide TE1,0 to cylindrical waveguide TE2,1 mode, has been designed, constructed, and tested. The design features a set of longitudinal slots, positioned in regions of negligible current flow for the TE2,1 mode, allowing its propagation to be preferentially favored, by suppression of the fundamental TE1,1 mode. Numerical simulations and experimental measurements display good agreement, showing transmission of the intended TE2,1 mode at levels of better than -5 dB, from a frequency of similar to 37.5 to 41 GHz. Subsequent farfield measurements confirm the presence of the TE2,1 mode, demonstrating good agreement when compared with analytical expectations. Such a device would be an ideal candidate for an application where mode purity, bandwidth, and ease of construction are of primary importance and where the transmission efficiency is of limited concern. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3480994]

AB - A novel, compact arrangement for Ka-band mode couplers, which convert a rectangular waveguide TE1,0 to cylindrical waveguide TE2,1 mode, has been designed, constructed, and tested. The design features a set of longitudinal slots, positioned in regions of negligible current flow for the TE2,1 mode, allowing its propagation to be preferentially favored, by suppression of the fundamental TE1,1 mode. Numerical simulations and experimental measurements display good agreement, showing transmission of the intended TE2,1 mode at levels of better than -5 dB, from a frequency of similar to 37.5 to 41 GHz. Subsequent farfield measurements confirm the presence of the TE2,1 mode, demonstrating good agreement when compared with analytical expectations. Such a device would be an ideal candidate for an application where mode purity, bandwidth, and ease of construction are of primary importance and where the transmission efficiency is of limited concern. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3480994]

KW - circular waveguides

KW - rectangular waveguides

KW - optical waveguides

KW - convertors

UR - http://www.scopus.com/inward/record.url?scp=77957704944&partnerID=8YFLogxK

U2 - 10.1063/1.3480994

DO - 10.1063/1.3480994

M3 - Article

VL - 81

SP - 094702

JO - Review of Scientific Instruments

T2 - Review of Scientific Instruments

JF - Review of Scientific Instruments

SN - 0034-6748

IS - 9

ER -