Hughes Aircraft Company Research Articles

Air-to-Ground Meteoric Scatter Communication System

Several point-to-point systems have demonstrated successful communications while employing propagation via meteor trail reflections at very high frequencies. However, few systems have been able to control the output error rate in the presence of sporadic <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">E</tex> and auroral phenomenon. Nevertheless, early results clearly indicated the strong potential of the meteor mode for extremely reliable communications over ranges (1300 miles) far in excess of existing military airborne UHF equipment. A test system is described which has been developed at Hughes Aircraft Company, Culver City, Calif. under Air Force contract AF33

A 350-watt CW periodically focused X-band traveling-wave amplifier

A 350 watt c-w, periodic permanent magnet focused X-band traveling-wave amplifier has recently been developed by the Hughes Aircraft Company. The tube provides 40 db gain over a 10% bandwidth, and therefore can be driven by commercially available backward wave oscillators. The operating voltage is 10 kv. at 0.35 amps. The major problem posed by this high average power operation is heat dissipation of the r-f circuit and of the loss. To obtain adequate circuit dissipation with periodic focusing, a coupled cavity slow wave circuit is used. The cavity walls and drift tubes are made partly of iron to serve as pole pieces for the periodic focusing structure. Copper is used foe the remainder of the walls to provide the required heat dissipation. Backward loss is provided by completely severing the circuit in three places and absorbing the r-f power in ceramic terminations. The terminations are made of ceramic loaded with the proper amount of silicon carbide to match them to the slow-wave circuit, and are capable of dissipating up to 75 watts. The lightweight periodic focusing makes the tube ideally suited for airborne application; the complete weight is only 17 lbs. The tube is rugged, being made entirely of metal and ceramic. The focusing magnets are temperature compensated for operation in ambients up to 150°C.

Simulation of Infrared Systems

This material was first published as a result of work performed by the author while on the technical staff of Hughes Aircraft Company, Culver City, California.

Scientific and business applications

article Free AccessScientific and business applications: on computing radiation integrals Authors: R. C. Hansen Hughes Aircraft Company, Culver City, CA Hughes Aircraft Company, Culver City, CAView Profile , L. L. Bailin Univ. of Southern California, Los Angeles, CA Univ. of Southern California, Los Angeles, CAView Profile , R. W. Rutishauser Litton Industries, Inc., Beverly Hills, CA Litton Industries, Inc., Beverly Hills, CAView Profile Authors Info & Claims Communications of the ACMVolume 2Issue 2Feb. 1959 pp 28–31https://doi.org/10.1145/368280.368296Published:01 February 1959Publication History 1citation428DownloadsMetricsTotal Citations1Total Downloads428Last 12 Months11Last 6 weeks1 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF

Educational Programs

A program in infrared spectroscopy; Hughes Aircraft Company; Boston College.

Research Facilities

The state of Florida; Hughes Aircraft Company; A new survery.

Education

The Oak Ridge Traveling Lecture Program; Seven representatives; Hughes Aircraft Company.