Scattering matrix integral equation analysis for the design of a waveguide Rotman lens

An integral-equation-based procedure is developed for determining the scattering parameters of a multiport Rotman lens device. The device is intended for use at millimeter-wave frequencies and incorporates rectangular waveguide feeds. The integral equation model takes higher order modes in the feed...

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Bibliographic Details
Published inIEEE transactions on antennas and propagation Vol. 47; no. 5; pp. 870 - 878
Main Authors Peterson, A.F., Rausch, E.O.
Format Journal Article
LanguageEnglish
Published IEEE 01.05.1999
Subjects
Antennas
Apertures
Beams (radiation)
Devices
Feeds
Frequency
Integral equations
Lenses
Millimeter wave measurements
Mutual coupling
Rectangular waveguides
Scattering
Scattering parameters
Sidelobes
Transmission line matrix methods
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Summary:An integral-equation-based procedure is developed for determining the scattering parameters of a multiport Rotman lens device. The device is intended for use at millimeter-wave frequencies and incorporates rectangular waveguide feeds. The integral equation model takes higher order modes in the feed apertures into account and incorporates mutual coupling between neighboring ports. A prototype lens was designed using the integral equation model and fabricated. The lens S-parameters were measured and modified with an ideal -40 dB (n=3) Taylor weighting function. The resulting beam sidelobe level is better than -30 dB.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0018-926X
1558-2221
DOI:10.1109/8.774150