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This specification covers insulated wire for use in external aircraft antennas.

The Viasat Global Mobile Antenna 5560-101 military-grade, Ku-/Ka-band, multi-network, multi-mode satellite communications antenna has demonstrated it can provide in-flight broadband connectivity to enable advanced situational awareness, en-route mission planning, and other applications that demand high forward and return link capacity. ...The Viasat Global Mobile Antenna 5560-101 military-grade, Ku-/Ka-band, multi-network, multi-mode satellite communications antenna has demonstrated it can provide in-flight broadband connectivity to enable advanced situational awareness, en-route mission planning, and other applications that demand high forward and return link capacity. ...FAA DO-160G certification enables the antenna to be installed on select manned and unmanned military aircraft, while passing AFMC C-17 MACC tests demonstrates the antenna's ability to become certified for Air Force and FMS C-17 aircraft.

Further decoupling between Panels and between Tiles has allowed the ASAR Antenna Thermal design to be verified at SubSystem level rather than at full Antenna level. The Thermal Control of the Antenna in OFF modes, using heaters and thermostats, had to be optimised in order to minimise the number of heater circuits and the heater power consumed. ...The Thermal design of the ENVISAT-1 ASAR Active Antenna has provided many engineering challenges. The selection of the Thermal Control has been complicated by the need to dissipate the high power (1300 watts) generated by the active equipments that are mounted on the Antenna Tile Sub-System directly behind the radiating surface. ...The selection of the Thermal Control has been complicated by the need to dissipate the high power (1300 watts) generated by the active equipments that are mounted on the Antenna Tile Sub-System directly behind the radiating surface. This high power has to be dissipated from the Antenna whilst minimising heater power consumption.

This paper presents the status of the telecommunication antennas that have been designed and manufactured within the development of the HERMES shuttle Rigid External Insulation. ...From the preliminary radio-frequency tests at high temperature to the complete C/SiC shingle antenna prototype, the design drivers, evaluation tests and manufacturing choices are discussed.

HALCA is a scientific satellite with a large deployable antenna to make experiments on space VLBI. The deployable antenna, developed under the requirements of large aperture area and accurate reflector surface, is formed of complicated structures and lots of mechanisms. ...Though heat exchange in the antenna was complicated and difficult to evaluate, antenna thermal performance in orbit was within expectations and all mechanisms were adequately controlled until the antenna deployment. ...Though heat exchange in the antenna was complicated and difficult to evaluate, antenna thermal performance in orbit was within expectations and all mechanisms were adequately controlled until the antenna deployment. This paper describes thermal control design of the large deployable antenna, thermal design verification in the thermal balance test, and evaluation of performance in orbit.

The Sentinel-1 SAR antenna is a large foldable planar phased array antenna which is formed by a centre panel and two antenna side wings. ...The Sentinel-1 SAR antenna is a large foldable planar phased array antenna which is formed by a centre panel and two antenna side wings. Once deployed, the antenna is more than 12 m long with a width of 1 m. Its mass is about 900 kg. ...The design is largely settled and the SAR Antenna CDR thermal analysis campaign is about to start. The environmental tests on Antenna Tile STM level (see details on verification approach) are planned for end of the year.

Two methods for measuring thermal distortion of antenna dishes under simulated space conditions are described: Photogrammetry Holography With modern photogrammetry an absolute resolution of 20 μm at 1 σ for antenna dishes with a diameter of 1 to 3 m can be achieved. ...Two methods for measuring thermal distortion of antenna dishes under simulated space conditions are described: Photogrammetry Holography With modern photogrammetry an absolute resolution of 20 μm at 1 σ for antenna dishes with a diameter of 1 to 3 m can be achieved. Statistical methods are used to evaluate the 10 to 30 pictures of the test item which are taken from different positions.

The overall goal of this program was the development of a 10 m. diameter, self-deployable antenna based on an open-celled rigid polyurethane foam system. Advantages of such a system relative to current inflatable or self-deploying systems include high volumetric efficiency of packing, high restoring force, low (or no) outgassing, low thermal conductivity, high dynamic damping, mechanical isotropy, infinite shelf life, and easy fabrication with methods amenable to construction of large structures (i.e., spraying). ...As part of a NASA Phase II SBIR, Adherent Technologies and its research partners, Temeku Technologies, and NASA JPL/Caltech, conducted activities in foam formulation, interdisciplinary analysis, and RF testing to assess the viability of using open cell polyurethane foams for self-deploying antenna applications.

Several last-generation and future satellite communication systems require the use of large deployable antennas. A European product in this field is presently not available: in this frame the European Space Agency assigned a contract for the development of the Large Deployable Antenna Reflector for advanced mobile communications (LDA). ...A European product in this field is presently not available: in this frame the European Space Agency assigned a contract for the development of the Large Deployable Antenna Reflector for advanced mobile communications (LDA). The project is driven by ALENIA SPAZIO as prime contractor and system designer with the support of other companies: EGS (Russia), HTS (Switzerland), SENER (Spain), Magna (Austria). ...The project is driven by ALENIA SPAZIO as prime contractor and system designer with the support of other companies: EGS (Russia), HTS (Switzerland), SENER (Spain), Magna (Austria). The Antenna consists of a paraboloid with 12m in projected aperture, 6.3m of focal length and located with a clearance of 3m from the focal axis.

The spacecraft will also include a dual frequency (Ku- and S-band) High Gain Antenna (HGA) which will serve as the primary system for transmitting the science data and spacecraft telemetry & command data to the ground via the TRDSS (Tracking and Data Relay Satellite System) network. ...The HGA assembly system thermal analysis includes transient thermal analysis for all operational and non-operational modes, with the antenna in the deployed and stowed configurations. The results of the analysis confirm that the overall thermal design adequately protects the HGA antenna from its environment. ...The results of the analysis confirm that the overall thermal design adequately protects the HGA antenna from its environment. The flight model of the HGA assembly is currently being integrated and is scheduled to go into thermal balance testing in late 1995.

The objective of the Laser Interferometer Space Antenna (LISA) mission is the detection of low-frequency gravitational waves. The fluctuation of the distance of test masses inside 3 spacecraft’s which are located 5·106km apart is measured with an accuracy of 10−12m to achieve this.

The ENVISAT ASAR antenna is 10 meters in length in the deployed configuration and consequently thermal balance testing was impossible due to TVAC chamber size and MGSE limitations. ...Therefore the verification of the ASAR active antenna thermal design was based mainly on analysis complemented, when necessary, by thermal balance tests at subsystem level on key components. ...Special emphasis was put on assessing the impact of uncertainties on albedo and earthshine for low time constant components of the ASAR antenna which is facing the Earth. Predictions of temperatures and heater power needs were based on a chain of thermal mathematical models starting at components level and ending up at system level, relying upon reduced models integrated into upper level detailed models and built from various software packages, viz.

The correlation results for the Tx feed assembly were subsequently used to update the spacecraft (S/C) L-Band antenna model. The updated S/C model temperature results for both the Tx and receive (Rx) feed assemblies were found to be 2°C to 3° C more benign that the original S/C model results. ...Therefore, the through conductance testing and correlation results demonstrate the validity of using the mathematical model developed for the S/C L-Band antenna thermal analysis.

In this study, polylactic acid (PLA) was preferred for the antenna substrate because it is environmentally friendly, easy to recycle, provides convenience in production design with a three-dimensional (3D) printer, and is less expensive compared to other available materials. ...Copper (Cu) tape and graphene filament were employed for the antenna patch component due to their benefits. The comprehensive comparative analysis between a full-wave model and a 3D-printed prototype of the antenna via the CST Microwave Studio program was demonstrated here. ...The comprehensive comparative analysis between a full-wave model and a 3D-printed prototype of the antenna via the CST Microwave Studio program was demonstrated here. The surface characterization was achieved with scanning electron microscope and energy dispersive X-ray (SEM-EDX) and X-ray diffractometer (XRD) analysis.

The efficiency of several Microstrip (Patch) antennas with varying substrate heights etched on a substrate material with a relatively high dielectric constant was calculated from gain measurement data.

This AIR discusses the use and application of EMC antennas and antenna factors. The relationships between antenna gain, antenna factor, power density (W/m2), and field strength (V/m) are discussed. ...Illustrations of commercially available EMC antennas commonly used in performing EMI measurements are included. In addition to the illustrations, the antenna factors, frequency ranges, typical uses (applications), and the manufacturers of these antennas are also listed. ...In addition to the illustrations, the antenna factors, frequency ranges, typical uses (applications), and the manufacturers of these antennas are also listed.

Signals within the ARINC 791 Satcom system, and in particular, between the Modman and the Antenna Subsystem, are described to permit interchangeability between any Modman and any Antenna Subsystem. ...This document provides the interface definition of the Satcom system. Any signal crossing into or out of the communication system is documented to ease aircraft integration. ...Signals within the ARINC 791 Satcom system, and in particular, between the Modman and the Antenna Subsystem, are described to permit interchangeability between any Modman and any Antenna Subsystem.

This specification covers insulated wire for use in external aircraft antennas.

This standard sets forth the desired characteristics of a second-generation aviation Ku-band and Ka-band satellite communication (satcom) system intended for installation in all types of aircraft.