Citation
Abstract
A well-matched dielectrically loaded waveguide, for operation between 18 and 26.5 GHz, has been built and is being used to test the characteristics of ruby for wide-bandwidth maser applications. The unit serves a dual purpose. The initial plan was to investigate and optimize pumping techniques at 19 and 24 GHz for future use with wide-bandwidth X-band masers. Results show that an order of magnitude improvement in pumping efficiency is possible. A second use for the dielectrically loaded waveguide was found during the initial tests. The unit has excellent amplifying capability in the 18- to 26.5-GHz range when used as a reflection-type amplifier. Gains of 7.5 dB (at 4.4 kelvins) and 16 dB (at 1.9 kelvins) were measured with instantaneous bandwidth exceeding 250 MHz.
Details
- Volume
- 42-25
- Published
- February 15, 1975
- Pages
- 128–136
- File Size
- 582.6 KB