Patent
Cassegrain antenna with dielectric guiding structure
TLDR
An end-fire antenna having a thick-wall dielectric tube concentrically positioned about the principal axis of a cassegrain antenna and seated on the main reflector functions as a guiding structure for focusing the antenna radiation as discussed by the authors.Abstract:
An end-fire antenna having a thick-wall dielectric tube concentrically positioned about the principal axis of a cassegrain antenna and seated on the main reflector functions as a guiding structure for focusing the antenna radiation.read more
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Patent
Hybrid mode horn antennas
Erik Lier,Tor Schaug-Pettersen +1 more
TL;DR: A horn antenna with a cylindrical and an expanded (horn-shaped) waveguide for radiating or receiving polarized electromagnetic waves was proposed in this article, where the waveguide wall was partially or wholly covered with one or more grids of electrical conducting material with dielectric layers between them.
Patent
Backfire antenna feeding
TL;DR: A backfire feed antenna has a parabolic reflector with a ring-focus at the reflector focal point comprising a dielectric waveguide having a stem portion and a cap portion with a pointed end as mentioned in this paper.
Patent
Rear feed assemblies for aerials
TL;DR: In this paper, a rear feed assembly for a microwave aerial, comprising a dielectric support member having an energy reflecting surface positioned against one face thereof, is described, and the support is so shaped that energy emitted from the waveguide means is reflected from the reflecting surface and emerges through a second face of the support with a spherical wavefront centered on the image phase center.
Patent
Dish antenna having a self-supporting sub-reflector assembly
TL;DR: In this paper, a dielectric tube is used to seat against the distal end of the main reflector, where the surface of the insert serves as a continuation of the sub-reflector.