Prototype maser amplifiers for three milimeter wavelength

Details Prototype maser amplifiers for three milimeter wavelength Prototype maser amplifiers for three milimeter wavelength

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phdt........86c&link_type=abstract

Ph.D. Thesis Massachusetts Univ., Amherst.

Astronomy and Astrophysics

Astronomy

Amplifiers, Masers, Ferrites, Prototypes, Telescopes, Traveling Waves

Scientific paper

A description is given of prototype designs for traveling wave maser amplifiers to be used at the new 13.7 meter millimeter wave telescope of the Five College Radio Astronomy Observatory near Amherst, Massachusetts. The maser amplifiers, using iron-doped rutile as the active maser material, have achieved 15 dB electronic gain in one prototype design over an instantaneous bandwidth of 140 MHz in the frequency range from 85-90 GHz. The use of a slot-fed-image-guide mode, and an alternative construction using a shielded microslot mode, provide a wide bandwidth coupling to the maser material, and are described and analyzed. A critical discussion is given of the scaling techniques employed in investigating these modes. The unique properties of uniaxial ferrites utilized as isolator material in the masers are discussed.

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