RESEARCH PROGRAM ON LOW-NOISE MICROWAVE RECEIVER AMPLIFYING DEVICES
Final rept., 27 Nov 1959-1 Dec 1960
RADIO CORP OF AMERICA HARRISON NJ
Pagination or Media Count:
Research concerned the development of solid-state devices and traveling wave tubes for use in a low noise microwave receiver. Two low-noise, L-band tunnel-diode amplifiers were built and delivered. Both amplifiers had voltage-gain-bandwidth products exceeding the objective specifications. The best experimental results were as follows center frequency 1270 mc, bandwidth 64 mc, gain 26 db, noise figure 5 db. Three parametric subharmonic oscillators pump frequency 5700 mc, signal frequency 2850 mc were built and delivered. A four-terminal low-noise modulate-demodulate L-band parametric amplifier was built and tested. A traveling-wave-tube amplifier is described which has demonstrated a capability for very low noise operation in the S-band range of microwave frequencies. Effort included theoretical studies concerning noise reduction in beam devices, coupled with experimental tests. The final tube design achieved minimum tube noise figures as low as 2.6 db and broadband noise figures of less than 3.5 db in the 2100 - 3500 mc frequency range.
- Electrical and Electronic Equipment