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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 1,009 records · Page 56

All sources NASA NTRS DOE OSTI

NASA NTRS1965

The output stage for the ground transmitter at Goonhilly

The power output amplifier of the transmitter for the Goonhilly project uses a travelling tube, type VX527 delivering 4 kW at 6,390 Me/s, with a bandwidth of about 100 Mc/s. This amplifier, together with its power supplies and driver stage is located in a cabin, situated on the turntable underneath the aerial. Input signals for the transmitter are received in the cabin from the main control room at a frequency of 70 Mc/s; they are converted to the to the nominal 6,390 Mc/s before being amplified to about 3 watts by the driver TWT and fed via a waveguide link to the output stage. The output stage, described below, was designed and manufactured by A.E.I. Electronic Apparatus Division, Leicester, England, during the first half of 1962.

TRAVELING WAVE AMPLIFIER↗

NASA NTRS1966

Photomixing devices Third summary report, 15 Feb. 1965 - 15 Feb. 1966

Current multiplication effect on diode bandwidth in InAs photodiodes for use in design of solid state optical heterodyne detectors

PHOTODIODE↗

NASA NTRS1967

Operational performance of an H-band coupled cavity transmission maser.

H-band coupled cavity transmission maser noting bandwidth gain and low noise temperature operation

MASER OUTPUT↗

NASA NTRS1967

Absorption bands and photon optical paths in a nonconservative scattering atmosphere.

Multiple scattering and finite detector bandwidth effects on shape of absorption features in atmospheric scattering

OPTICAL PATH↗

NASA NTRS1967

Rapid methods of determining cooling rates of iron and stony iron meteorites.

Iron and stony meteorite cooling rates determined by measuring kamacite bandwidth, bulk nickel content and composition

WIDMANSTATTEN PATTERN↗

NASA NTRS1967

Nonstationary correlation analysis.

Nonstationary correlation analysis using correlator in which bandwidths of two filters resolve errors

FILTER↗

NASA NTRS1967

Short-duration, narrow-band solar bursts at 38 Mc/s.

38 MHz solar burst duration, bandwidth, amplitude, number and polarization characteristics noting possible generating mechanisms

SOLAR RADIO BURST↗

NASA NTRS1968

Improved traveling wave maser amplifier

Traveling Wave Maser /TWM/ that operates at S-band frequencies is characterized by a greatly improved gain-bandwidth product with relatively low equivalent-noise temperature. Tests indicate that its performance exceeds that of any other type of S-band amplifier.

Clauss, R. C.↗

NASA NTRS1968

Technique developed for measuring transmittance of optical birefringent networks

The transmission characteristics of synthesized optical single-pass and double-pass birefringent networks is obtained by measuring network transmission as a function of network temperature. This technique is most useful for testing those birefringent networks whose bandwidths and periods are very small.

Ammann, E. O.↗

NASA NTRS1968

Deep space FM system, a concept

Deep space frequency modulation system permits transmission of data where the signal deviation is greater than 1/2 the predetection bandwidth. It provides satisfactory performance at great distances or with low signal levels.

Doland, G. D.↗

NASA NTRS1968

Design of dissipative linear phase filters

Set of design curves eliminates work involved in designing linear phase filters by being normalized in such a way as to apply to low, band, and high-pass filters of any bandwidth. Similar curves for any number of poles are plotted by solving a system of simultaneous equations.

Phares, R. L.↗

NASA NTRS1967

Optical processing techniques Semiannual status report, 1 Mar. - 31 Aug. 1967

Holograms as visual displays, reduction of space-bandwidth product in holography, and propagation of optical signals or imaging through turbulent media

Leith, E. N.↗

NASA NTRS1968

A quasi-omnidirectional slot array antenna for spacecraft use at microwave frequencies

Quasi-omnidirectional resonant array of circumferential shunt slots in ring waveguides for narrow bandwidth space vehicle applications at microwave frequencies

Croswell, W. F.↗

NASA NTRS1967

Wideband television recorder Final report

Variable bandwidth, miniature, television recorder/reproducer design criteria and performance test data

Source record↗

NASA NTRS1968

The FDM demodulating characteristics of non- linear phase-locked loops.

Minimum noise and maximum information bandwidths for phase locked loops in demodulated FM multiplexed subcarriers

Carden, F. F.↗

NASA NTRS1968

Photodielectric detector using a superconducting cavity.

Microwatt intensity wide bandwidth optical detector for measuring photodielectric response using superconducting cavity

Arndt, G. D.↗

NASA NTRS1968

Pulsars - Observations of spectra.

Dynamic spectrograms of pulsars CP 1919 and CP 0834 over bandwidth of 3 MHz, noting instantaneous spectrum and time frequency history

Goldstein, R. M.↗

NASA NTRS1968

Visible CW parametric oscillator.

Tunable optical continuous wave parametric oscillator using 5145 angstrom Ar laser pump and lithium niobate as nonlinear material, noting large oscillation bandwidth

Byer, R. L.↗