I’m working on a simple, waterproof, reproducible design for a 10 GHz dish feed for folks who are taking part in the group buy project to build F6BVA 10 GHz to UHF transverters. This uses a probe launch into a round waveguide machined from solid aluminium. The lens is made from Rexolite 1422, which is a free-machining cross-linked polystyrene with well-defined relative permittivity and a loss tangent of about 0.0004. This one is designed for a rather flat offset dish I have with equivalent f/d about 0.75, but I will be doing some for more common offset dishes
2 thoughts on “10 GHz Dielectric lens Feedhorn”
Here is my simulation using openEMS.
Figure-9 : radiation pattern from a simple circular waveguide.
Figure-10 : waveguide + S-band patch antenna
Figure-11 : waveguide + dielectric -rod + S-band patch antenna
73 – JA6XKQ, Yoshi Takeyasu
Very interesting Yoshi, many thanks for posting this