Satellite Application Notes and White Papers

  1. High Gain Phototransistor Optocouplers For Space Applications 7/18/2013

    One of the first optocouplers used for high reliability applications was the simple phototransistor optocoupler. The basic devices were the 4N22, 23, 24 and the 4N47, 48, 49 series of hermetic phototransistor optocouplers in TO‐five type transistor cans made for military applications developed in the early 1970s. However, these devices were never designed specifically for space radiation environments. By Steve Ching and Manor Narayanan, Isolink, a subsidiary of Skyworks Solutions, Inc.

  2. Photonic Links Allow MILSATCOM And RF Distribution Networks To Leverage Optical Communication Infrastructure 10/21/2011

    The proliferation of and reliance on RF systems has necessitated the need for robust, secure, and distributed network topologies. As a result, the defense industry is incorporating optical fiber cabling in lieu of coaxial cables or waveguides within major communications and weapons systems.

  3. Backhaul Infrastructure For Critical Satellite Based Continuity Of Communications Solutions 10/21/2011
    The ever present threats from terrorism and natural disasters have brought to the forefront a renewed focus on emergency backup communications strategies and solutions for federal, state, and commercial enterprises. Otherwise known as Continuity Of Communications, organizations worldwide are instituting initiatives to seek and develop the means by which to achieve rapidly deployable and robust systems in support of Infrastructure Security, Disaster Relief and Emergency Preparedness.
  4. Electromagnetic Analysis Of An Antenna Mounted On A Satellite Platform 9/30/2009
    This article deals with the analysis of a complex antenna mounted on a satellite platform. The geometry of an Iridium satellite is considered, of which a constellation of 66 are at present employed in providing a global mobile communication service. The article gives readers an understanding of the present capabilities of CEM tools in relation to computational resources when dealing with real-world aerospace applications. By Matthys M. Botha and Ernst H. Burger, EM Software & Systems
  5. Compatibility Of Services Using WiMAX Technology With Satellite Services In The 2.3 To 2.7 GHz And 3.3 To 3.8 GHz Bands 6/3/2009
    WiMAX system profiles currently consider use of the frequency bands 2.3 to 2.7 GHz and 3.3 to 3.8 GHz which also have ITU frequency allocations for satellite services. The purpose of this article from the WiMAX Forum is to provide background on the satellite-related issues that relate to co-existence with wireless access services in these two bands and address the interference scenarios that can occur. By the WiMAX Forum
  6. White Paper: Compatibility Of Services Using WiMAX Technology With Satellite Services In The 2.3 To 2.7 GHz And 3.3 To 3.8 GHz Bands 6/3/2009
    WiMAX system profiles currently consider use of the frequency bands 2.3 to 2.7 GHz and 3.3 to 3.8 GHz which also have ITU frequency allocations for satellite services. The purpose of this article from the WiMAX Forum is to provide background on the satellite-related issues that relate to co-existence with wireless access services in these two bands and address the interference scenarios that can occur. By the WiMAX Forum
  7. Application Note: A Low-Cost Mixer For The 10.7 To 12.8 GHz Direct Broadcast Satellite Market 3/5/2009
    The wide bandwidth requirement in DBS satellite applications places a big performance demand on the individual components in the low-noise block downconverter. This article describes a low-cost, wide bandwidth passive mixer for 10.7 to 12.8 GHz DBS applications with low LO drive requirements. The mixer uses a dual mixer diode in the SOT-23 package.