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Radiation characteristics of waveguide-excited dielectric spheres with matched sphere-air boundary
Dilipkumar Banerjee
Published in
Volume: 9
Issue: 2
Pages: 40 - 41
The results of experiments on the radiation characteristics of circular-waveguide-excited dielectric spheres with matched sphere-air boundaries are reported. The test data have shown that a waveguide-excited dielectric sphere, backed by a metallic hemisphere and with simulated quarter-wavelength matching at the dielectric-air boundary through surface perturbations, produces a directive pattern with a low side-lobe level, increased on-axis gain and reduced 3 dB beamwidth, as compared with a simple waveguide-excited dielectric sphere of the same diameter and an optimum horn with an aperture of identical cross-sectional area. Also, it presents a low voltage standing-wave ratio over the waveguide band. © 1973, The Institution of Electrical Engineers. All rights reserved.
About the journal
JournalElectronics Letters
Open AccessNo
Concepts (3)
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    Waveguide components
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