Quasi-optical diplexer for millimeter wavelengths

Details Quasi-optical diplexer for millimeter wavelengths Quasi-optical diplexer for millimeter wavelengths

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978rsci...49.1741p&link_type=abstract

Review of Scientific Instruments, vol. 49, Dec. 1978, p. 1741-1743.

Astronomy and Astrophysics

Astronomy

7

Cassegrain Antennas, Diplexers, Millimeter Waves, Mixing Circuits, Radio Telescopes, Antenna Radiation Patterns, Far Fields, Image Processing, Sidebands, Signal Processing

Scientific paper

A quasi-optical diplexer for injection of signal and local oscillator frequencies into a mixer at millimeter wave-lengths is described. The diplexer accepts both image and signal bands, presents low loss at both the signal and local oscillator frequencies and rejects local oscillator noise at the signal frequency. The configuration of the device makes it particularly useful for Cassegrain receivers using a cooled mixer and a lens corrected feed system. The diplexer has been tested at 150 GHz on the 11-m radio telescope operated by The National Radio Astronomy Observatory in Tucson, Arizona.

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