Spacecraft antenna systems Final engineering report, Oct. 1963 - Jan. 1966
Spacecraft communication system with reliable, beam-steering antenna
STEERABLE ANTENNA↗
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Computer controlled antenna system
Digital techniques are discussed for application to the servo and control systems of large antennas. The tracking loop for an antenna at a STADAN tracking site is illustrated. The augmentation mode is also considered.
Raumann, N. A.↗
Satellite-Tracking Millimeter-Wave Reflector Antenna System For Mobile Satellite-Tracking
A miniature dual-band two-way mobile satellite-tracking antenna system mounted on a movable vehicle includes a miniature parabolic reflector dish having an elliptical aperture with major and minor elliptical axes aligned horizontally and vertically, respectively, to maximize azimuthal directionality and minimize elevational directionality to an extent corresponding to expected pitch excursions of the movable ground vehicle. A feed-horn has a back end and an open front end facing the reflector dish and has vertical side walls opening out from the back end to the front end at a lesser horn angle and horizontal top and bottom walls opening out from the back end to the front end at a greater horn angle. An RF circuit couples two different signal bands between the feed-horn and the user. An antenna attitude controller maintains an antenna azimuth direction relative to the satellite by rotating it in azimuth in response to sensed yaw motions of the movable ground vehicle so as to compensate for the yaw motions to within a pointing error angle. The controller sinusoidally dithers the antenna through a small azimuth dither angle greater than the pointing error angle while sensing a signal from the satellite received at the reflector dish, and deduces the pointing angle error from dither-induced fluctuations in the received signal.
Densmore, Arthur C.↗
Electromagnetic Modeling for the Conformal Lightweight Antenna System for Aeronautical Communications Technologies (CLAS-ACT) Program: Final Report
A series of electromagnetic simulations was conducted for the Conformal Lightweight Antenna System for Aeronautical Communications Technologies (CLAS-ACT) Program. The program designed, built, and flight tested a 14.25 GHz conformal patch array antenna for satellite communications on a T-34C airplane. Various studies were performed to evaluate the effects of antenna element spacing, array shape, signal taper, phased array pointing angle, null steering coefficients, antenna platform, and location on the airplane. This report documents the methods and some of the results of tests done over a 2 ½ year period.
Mackenzie, Anne I.↗
Antenna system using parasitic elements and two driven elements at 90 deg angle fed 180 deg out of phase Patent
Monopole antenna system for maximum omnidirectional efficiency for use on satellites
Ford, R. R.↗
The 60 GHz antenna system analyses for intersatellite links, phase B
The purpose of this study is first to investigate, classify, and compare applicable antenna systems capable of establishing and maintaining intersatellite links at 60 GHz and secondly to select the most applicable system for a detailed conceptual design. The results are to be applicable to the development of intersatellite links at 60 GHz for future programs. Design goals are listed.
Source record↗
Deployment/retraction mechanism for solar maximum mission high gain antenna system
A mechanism called a deployment/retraction assembly (DRA) which provides not only a stable, but a deployable platform for the high gain antenna system (HGAS) aboard the Solar Maximum Mission (SMM) spacecraft is described. The DRA also has the capability to retract the system upon command.
Bennett, N.↗
Saturn antenna systems SA-5, volume 1
Antenna radiation patterns for Saturn I /Sa-5/ launch vehicle very high frequency telemetry system and minitrack-VOT system
VERY HIGH FREQUENCY RADIO EQUIPMENT↗
RF Design and Predicted Performance for a Future 34-meter Shaped Dual-reflector Antenna System Using the Common Aperture X-S Feedhorn
The Networks Consolidation Program (NCP) will utilize 34-meter shaped dual-reflector Cassegrain antennas. The shaping calculations, the X/S-band feedhorn to be used, and the predicted RF performance of this antenna system are discussed.
Williams, W. F.↗
K- and Ka-band Mobile-Vehicular Satellite-Tracking Reflector Antenna System for the NASA ACTS Mobile Terminal
This paper describes the development of the K- and Ka-band mobile-vehiclular satellite-tracking reflector antenna system for NASA's ACTS Mobile Terminal (AMT) project. ACTS is NASA's Advanced Communications Tehcnology Satellite.
K-Band↗
Large Deployable-Mesh Antenna System for Ocean Salinity and Soil Moisture Sensing
A concept has been studied for remote sensing of sea surface salinity and soil moistute from space using a large deployable mesh antenna system.
microwave remote sensing mesh antenna ocean salini↗
Evaluation of frequency-selective reflector antenna systems
The performance of a four-frequency (S/X/Ku/Ku bands) frequency-selective surface (FSS) with double-ring elements (the type of geometry particularly well suited for the circular polarization requirement of the NASA's Cassini project) is evaluated for a planar and a curved FSS subreflector in a dual reflector antenna system. Good agreement is obtained between the calculated and measured data for the planar FSS model. The FSS effects in a four-frequency Cassegrain reflector antenna were accurately evaluated by taking into account the surface curvature and the FSS subreflector's transmitted/reflected field variation as functions of the polarization and the incident angles with respect to the local coordinates.
Wu, T. K.↗
Study of shuttle imaging microwave system antenna. Volume 1: Conceptual design
A detailed preliminary design and complete performance evaluation are presented of an 11-channel large aperture scanning radiometer antenna for the shuttle imaging microwave system (SIMS) program. Provisions for interfacing the antenna with the space shuttle orbiter are presented and discussed. A program plan for hardware development and a rough order of magnitude (ROM) cost are also included. The conceptual design of the antenna is presented. It consists of a four-meter diameter parabolic torus main reflector, which is a graphite/epoxy shell supported by a graphite/epoxy truss. A rotating feed wheel assembly supports six Gregorian subreflectors covering the upper eight frequency channels from 6.6 GHz through 118.7 GHz, and two three-channel prime forms feed assemblies for 0.6, 1.4, and 2.7 GHz. The feed wheel assembly also holds the radiometers and power supplies, and a drive system using a 400 Hz synchronous motor is described. The RF analysis of the antenna is performed using physical optics procedures for both the dual reflector Gregorian concept and the single reflector prime focus concept. A unique aberration correcting feed for 2.7 GHz is analyzed. A structural analysis is also included. The analyses indicate that the antenna will meet system requirements.
Wesley, R. W.↗
High-gain, self-steering antenna system, engineering model Design review report
Engineering model design of high gain self- steering antenna array for satellite communication applications
STEERABLE ANTENNA↗
Study of spacecraft antenna systems Interim engineering report /final/, Oct. 1963 - Jan. 1965
Tracking antenna for spacecraft communications system
ELECTRONIC CONTROL↗
Phase compensation for widely-spaced antenna systems employing coherent signal combinations.
Phase compensation technique for signals received at widely spaced antennas and processed at central location
PHASE CONTROL↗
Evolution of a spacecraft antenna system
Mechanically despun multifrequency, attitude sensing antenna for spin stabilized spacecraft, deep space probes, tactical communications and community broadcast applications
Kampinsky, A.↗
Switched-Multibeam Antenna System
Various time delays introduced at intermediate frequency aim antenna in different directions. System includes spherical reflector with feed horn containing two five-element cross arrays. Each element in cross array connected to different set of switched delay lines. Antenna has low and moderate gains and wide coverage.
Iwasaki, R. S.↗