Performance of A 1-2 GHz Preamplifier for Stochastic Beam Cooling System
The characteristics of the LBL continuous-wave wide-band low-noise preamplifier, version B, have been presented over a frequency range of approximately 1-2GHz. In this preamplifier the source leads of the transistors in the first two stages are soldered directly to copper studs which are attached to the copper enclosure box to get better thermoconductivity. Two sets of noise figures were presented with one set optimized at 3000 K and the other at 18 K. When the N.F. was optimized at 80 K the result was very much the same as the one optimized at l8 K. It was found that different transistors behaved differently Hence individual amplifier must be optimized at the intended operating temperature. The VSWR data presented are those of the room temperature. The change in VSWR at low temperatures are not significantly different from those at room temperature. The output power as a function of input power at various frequencies and their intermodulation products are very much the same at all temperatures. The preamplifier is unconditionally stable with an open or shorted sliding line at the input port.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 982851
- Report Number(s):
- FERMILAB-PBAR-NOTE-283; oai:inspirehep.net:859978; TRN: US201014%%754
- Country of Publication:
- United States
- Language:
- English
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