Journal ArticleDOI
Propagation and radiation characteristics of dielectric loaded corrugated dual-frequency circular waveguide horn feeds
M. Narasimhan,M. Sheshadri +1 more
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TLDR
In this article, the design and experimental studies on a composite dual-frequency feed with a single radiating aperture are presented, based on a systematic analysis, and the criterion for selecting the ratio of the diameter of the corrugated guide excited at lower frequency in the dominant mode to that of the dielectric rod, axially located within the guide and excited at the higher frequency in dominant mode, is discussed.Abstract:
Based on a systematic analysis the design and experimental studies on a composite dual-frequency feed with a single radiating aperture are presented. The criterion for selecting the ratio of the diameter of the corrugated guide excited at the lower frequency in the dominant mode to that of the dielectric rod, axially located within the guide and excited at the higher frequency in the dominant mode, is discussed. The constructional features of a typical dual-frequency feed designed for operation at S and X bands (with 2.68 GHz and 9.375 GHz as center frequencies, respectively) are outlined. The measured radiation patterns show good symmetry and sidelobe suppression over 20-percent bandwidth in S and X bands and are in good agreement with calculated patterns.read more
Citations
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Journal ArticleDOI
A compact Q-K-band dual frequency feed horn
TL;DR: In this paper, a dual frequency circularly polarized feed for an offset reflector antenna was developed for a portable satellite ground terminal, which achieved good aperture efficiency and low sidelobes in both of the frequency bands.
Journal ArticleDOI
Diplexing feed assemblies for application to dual-reflector antennas
TL;DR: In this article, the authors investigate possible configurations for dual-band waveguide diplexing assemblies appropriate for use as feed systems for dual reflector antennas, where the bands are well separated and individually have relatively wide bandwidths.
Proceedings ArticleDOI
Recent progress in development of multiband feed horns (Review)
TL;DR: An overview of the multiband feed system for reflector-type antennas is presented in this paper, which includes coaxial, multimode Potter's type structures, multiband corrugated and dielectric loaded feed horns.
Journal ArticleDOI
On the definition of the generalized scattering matrix of a lossless radial line
TL;DR: In this paper, the generalized scattering matrix for a radial line (rGSM) is defined and a double linear taper has been realized and the experimental and theoretical results, obtained with rGSM, are compared, showing a very good agreement in a wide band.
Journal ArticleDOI
Multiband feed using coaxial configuration
TL;DR: In this article, a dual-aperture coaxial multiband feed horn that operates at S, Ku, K, K and Ka bands was designed to achieve aperture efficiencies of 85% for S and Ku bands and 60% for K and K bands and cross-polarization level of −20 dB within 30 degree off-boresight.
References
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Journal ArticleDOI
A quasi-optical polarization-independent diplexer for use in the beam feed system of millimeter-wave antennas
Adel A. M. Saleh,R. Semplak +1 more
TL;DR: In this paper, the theory and performance of a quasi-optical Fabry-Perot diplexer employing two rectangular meshes and capable of polarization independent operation at large angles of incidence are presented.
Journal ArticleDOI
Phase signature radars
W Goggins,P Blacksmith,C Sletten +2 more
TL;DR: In this article, the identification and classification of radar targets is facilitated by a newly developed technique based on measurements of the differential phase shift of the target scattering obtained at harmonic phase-locked frequencies.
Journal ArticleDOI
Wide-band communication satellite antenna using a multifrequency primary horn
H. Kumazawa,M. Koyama,Y. Kataoka +2 more
TL;DR: In this paper, the design method of and experimental results obtained from a wide-band satellite antenna with a multifrequency primary horn is described, which can be used in 4, 6, 20, and 30 GHz frequency bands.
Journal ArticleDOI
Improvement of TE 11 mode coaxial waveguide and horn radiation patterns by incorporation of a radial aperture reactance
TL;DR: In this article, an approximate technique for determining the radiation patterns of a TE-11-mode coaxial radiator with a radial aperture reactance is presented. But the authors do not consider the effect of the radial reactive iris in the aperture plane.
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