Preview

CORRU_PRIMER

Good Essays
Open Document
Open Document
4016 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
CORRU_PRIMER
Tom Milligan
Miligan & Associates
8204 West Polk Place
Uttleton, CO 80123
~303)
w7-726a
(303)977-8853(Fax)
TMilligan@ieee.org
(e-mall)

Design of Corrugated Horns: A Primer
Christophe Granet and Graeme L. James
CSIRO ICT Centre, Electromagnetics & Antennas
PO Box 76, Epping 1710, NSW, Australia
E-mail: Christophe.Granet@csiro.au
Keywords: Corrugated horn antennas; antenna feeds; reflector antenna feeds

Slots

1. Introduction

0

ver the past 40 years, corrugated horns supporting so-called hybrid modes have become well established as feeds for reflector antennas, and even as direct radiators. It is not difficult to trace the popularity of the corrugated hom, given the ability of certain hybrid modes to produce radiation patterns having extremely good beam symmetry with low cross-polarization levels, a high beam efficiency with very low sidelobes, and the potential for wide-bandwidth performance [ l , 21. Why they are called “corrugated” is clear from the typical example of a horn shown in Figure 1, where the inside wall is manufactured in a succession of slots and “teeth.” The purpose of the corrugated surface is to provide the means to support the propagation of hybrid modes within the horn. Hybrid modes are basically a combination of TE and TM

is

Mode Converter

Figure la. A cut-away view of a typical corrugated horn.
76

...........

rkq

pzl

@
.
g

m

Id

m.......

...

Teeth
Figure lb. The details of the corrugated inside wall of a typical corrugated horn.
/€€€Antennas and Propagation Magazine, Vol. 47, No. 2, April 2005

modes. For this combination to propagate as a single entity with a common propagating velocity, the horn or waveguide must have anisotropic surface-reactance properties: properties that are satisfied by the corrugated surfacc. It is worth pointing out that hybrid modes can also be supported by other means, such as waveguides or horns partially filled with dielectric



References: Microwave Horns and Feeds, London, IEE Electromagnetic Wave Series 39, 1994, ISBN 0 85296 809 4. tions on Microwave Theory and Techniques, MTT-29, 1981, pp. IO. C. Granet, “Profile Options for Feed Horn Design,” Proceedings of the Asia Pacific Microwave Conference, Vol. I, 2000, pp. 10, October 1984, pp. 1134-1138. Techniques for Reflector Antennas, 1983, pp. 211-216. ISAP’96, Chiba, Japan, pp. 1133-1136.

You May Also Find These Documents Helpful

  • Good Essays

    NT1310 Unit 9 Lab 1

    • 1254 Words
    • 4 Pages

    1. Radial Splice Enclosures – radial splice enclosures have cables enter and exit the enclosure on the same side.…

    • 1254 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Type of electrical connection often used in telephony; it is named because the solid copper wires are "punched down" into short open-ended slots which are a type of insulation-displacement connectors.…

    • 836 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Nt1310 Chapter 7

    • 2209 Words
    • 9 Pages

    6. If the selectivity of a tuned circuit is too sharp, the sidebands of the received signal may be attenuated.…

    • 2209 Words
    • 9 Pages
    Good Essays
  • Powerful Essays

    Plc Software and Hardware

    • 4144 Words
    • 17 Pages

    Energy is requirement of every country in today’s world. It has become a basic need of almost every human being. Energy has different forms for example, mechanical energy, solar energy, nuclear energy and so on. Another form of energy is electricity. Electricity is used to light our houses, offices, schools, buildings, streets and so on. Its importance increases when there is no sunlight available. This type of energy can be used in light bulbs, street lights and so on. As the energy has become an important…

    • 4144 Words
    • 17 Pages
    Powerful Essays
  • Good Essays

    to form an unusual pattern that helps define the space. Using this structure and skin pattern…

    • 1951 Words
    • 8 Pages
    Good Essays
  • Satisfactory Essays

    The Trumpf 6000 TLF 6000 TURBO welding laser is perfectly adept in creating a specialized Transfer Tube cell. American Hydroformers is able to form two different diameter tubes of the same length. The two tubes are pressed together, forming a tight fit between them. The outer tube has 3 lobe formations pressed into it that creates a chamber between the inner and outer tube. Typically these parts are used in tractor-trailer type trucks as a component of the automatic transmission and work similar to a rotating hydraulic manifold.…

    • 292 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    utre

    • 392 Words
    • 2 Pages

    An A paper, that is, essay or blog, is extraordinary work that more than fulfills the requirements of the assignment. This work tackles the topic in an innovative way, with a clear sense of audience and purpose, an insightful thesis, and an appropriate and effective organization. The structure is carefully planned; each section of the essay develops the thesis with logical arguments and specific, conclusive evidence which has been interpreted and clearly related to the writer's point. The style is energetic and precise: the sentence structure is varied and the words are carefully chosen. How the writer says things is as excellent as what the writer says. There is evidence of careful editing since the essay contains few grammatical and/or mechanical errors and, if necessary, is correctly documented using MLA format.…

    • 392 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    Cello User Guide

    • 425 Words
    • 2 Pages

    Technolog Limited, Ravenstor Road, Wirksworth, Derbyshire, DE4 4FY, UK Tel: +44 (0)1629 823611 Fax: +44 (0)1629 824283 Email: technolog@technolog.com…

    • 425 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    csrr

    • 10734 Words
    • 67 Pages

    Oxfam Discussion Papers A safe and just space for humanity CAN WE LIVE WITHIN THE DOUGHNUT? Kate Raworth Oxfam Humanity’s challenge in the 21st century is to eradicate poverty and achieve prosperity for all within the means of the planet’s limited natural resources. In the run-up to Rio+20, this discussion paper presents a visual framework – shaped like a doughnut – which brings planetary boundaries together with social boundaries, creating a safe and just space between the two, in which humanity can thrive. Moving into this space demands far greater equity – within and between countries – in the use of natural resources, and far greater efficiency in transforming those resources to meet human needs.…

    • 10734 Words
    • 67 Pages
    Good Essays
  • Satisfactory Essays

    Figure 4.1. This figure depicts the different meshing of the surfaces and solids of the box wing…

    • 927 Words
    • 4 Pages
    Satisfactory Essays
  • Good Essays

    Tapering of Arrays

    • 410 Words
    • 2 Pages

    In edge pattern only two array elements are active and are fed equal input while the rest are all passive. This type of feeding results in an SLL of 0dB (which means that all the lobes are of equal amplitude) and HPBW of 130. The radiation pattern for a normalized field due to 5 sources of 600MHz with a distance lambda/2 is shown below:…

    • 410 Words
    • 2 Pages
    Good Essays
  • Better Essays

    First of all, the different applications of sandwich panels in the aeronautical sector will be explained. Then, the current theoretical framework will be discussed, as well as the existing methods of manufacturing.…

    • 1277 Words
    • 6 Pages
    Better Essays
  • Powerful Essays

    rrrr

    • 5973 Words
    • 24 Pages

    For E n d e r ’s G a m e , we also have these materials:…

    • 5973 Words
    • 24 Pages
    Powerful Essays
  • Satisfactory Essays

    Uu114

    • 4000 Words
    • 16 Pages

    Acknowledgement................................................................................................................. 3 Summary .............................................................................................................................. 4 Introduction ........................................................................................................................... 5 Background ....................................................................................................................... 5 Introduction ....................................................................................................................... 5 Event Planning and Organization .......................................................................................... 7 Planning of the Event ........................................................................................................ 7 Organizers ..................................................................................................................... 7 Event Committee ........................................................................................................... 7 Organisation of the Event .................................................................................................. 8 a) b) c) Duration .................................................................................................................. 8 Schedule of…

    • 4000 Words
    • 16 Pages
    Satisfactory Essays
  • Powerful Essays

    A few words on the history and future of surface chemistry For more than 400 years, important scientists and mathematicians like Leonardo da Vinci, Isaac Newton, Pierre Simon Laplace, Thomas Young, Siméon Denis Poisson, Josiah Willard Gibbs, Frederick M. Fowkes have done valuable pioneer work for the explanation of surface tension, capillarity, wetting and other interfacial problems. As a sector of physical chemistry, surface chemistry in connection with colloid chemistry established itself as an independent science about 70 years ago. Important milestones in modern theory and practice of wetting properties are the works of Girifalco/Good and Fowkes from the 50s and 60s of this century. They formed the basis for the analysis and optimization of solid and liquid interfaces frequently applied today. Although most of us don't realize it, interfacial processes rule our everyday life wherever we go. A multitude of processes, whether in a household or in industrial production, is influenced by interfaces and their chemical state. All known high technologies with a promising future, like wafer and chip production, biochemistry and gene technology as well as micro-system technology benefit in particular from the increasing understanding of interfacial correlations. The DataPhysics team would like to take you on a little tour of this exciting world.…

    • 7203 Words
    • 29 Pages
    Powerful Essays

Related Topics