A Wideband Waveguide Antenna with Nearly Equal E- and H-Plane Radiation Patterns

A novel wideband waveguide antenna with excellent performance is proposed, which is composed of a coaxial-waveguide transition and an open-ended rectangular waveguide loaded with a pair of horizontal umbrella-shaped metallic brims. The brims perpendicular to two broad walls of the waveguide are cons...

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Bibliographic Details
Published inInternational journal of antennas and propagation Vol. 2013; no. 2013; pp. 1 - 8
Main Authors Qi, Mei Qing, Xu, He-Xiu, Ma, Hui Feng, Jin, Mou Ping, Wang, Wei, Cui, Tie Jun
Format Journal Article
LanguageEnglish
Published Cairo, Egypt Hindawi Puplishing Corporation 01.01.2013
Hindawi Publishing Corporation
Hindawi Limited
Wiley
Subjects
Antennas
Impedance matching
Ladders
Lobes
Polarization
Satellite communications
Walls
Waveguide antennas
Wideband
Wireless communications
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Summary:A novel wideband waveguide antenna with excellent performance is proposed, which is composed of a coaxial-waveguide transition and an open-ended rectangular waveguide loaded with a pair of horizontal umbrella-shaped metallic brims. The brims perpendicular to two broad walls of the waveguide are constructed to modulate the antenna to radiate nearly identical E- and H-plane radiation patterns. A wideband impedance matching performance is achieved with a fractional bandwidth of 40% through the introduction of short-stepped ladders. The antenna has the advantages of simple structure, symmetric radiation pattern, low-cross polarization, moderate back lobe, and almost constant beamwidth.
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ISSN:1687-5869
1687-5877
DOI:10.1155/2013/608393