Citation
Abstract
An 845 GHz dual-channel, dual-polarization traveling-wave maser (TWM) amplifier has been installed in the XKR solar system radar cone at DSS 14. The TWM is based on the BIk ITA 8.45 GHz maser structure, with two of the four maser stages being used for each channel, and each maser half then followed by a high-performance GaAs FET amplifier to achieve the desired net gain. A new shortened low-noise input waveguide and an orthogonalmode junction which is cooled to 4.5 K feeds each amplifier chain. The rotation of an external polarizer permits the polarization of each channel to be defined as either linear or circular. A new circular waveguide switch was also developed to provide for noise calibration and to protect the maser from incident transmitter power.
Details
- Volume
- 42-89
- Published
- May 15, 1987
- Pages
- 94–100
- File Size
- 561.5 KB