Doc Ewen: The Horn, HI, and Other Events in US Radio Astronomy

Slide 22: Microwave and Millimeter Wave Applications in the 1970s and 1980s

Sketch of Cassegrain antenna and signal path components at entrance to GOMUX. A Gaussian optics frequency multiplexer (GOMUX) separates the 30-110 GHz signal into 8 contiguous bands, each having a 10 GHz bandwidth. After the wideband beam is focused by the Cassegrain antenna to a beam waist at the secondary focal point, the beam is repeatedly refocused by a series of solid or perforated ellipsoidal mirrors. The solid ellipsoidal mirrors and one flat mirror are used in the input chain to the GOMUX Credit: Photo courtesy of Doc Ewen.
Slide 23