Citation
Abstract
The maser is ready for installation on the 64-mdiameter antenna at the Deep Space Communications Complex at Goldstone, Calif. Gain, phase, and group delay stability were measured as a function of magnetic field, refrigerator temperature, power supply voltages and large interfering signals. Several features have been included in this maser to improve the stability performance. A superconducting magnet provides a very stable magnetic field. Push-push pumping results in complete pump saturation and reduced pump frequency stability requirements. Low pass filters at a temperature of 4.5 K reduce pump power radiation in signal waveguides. The maser has 45 dB net gain and 17-MHz, 3-dB bandwidth with an equivalent input noise temperature of 64% K at 8415 MHz and 8% K at 7850 MHz. Simultaneous operation at two frequencies, separated by up to 500 MHz, is available at reduced gain.
Details
- Volume
- XI
- Published
- October 15, 1972
- Pages
- 128–136
- File Size
- 1.5 MB