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Military Satellite Technology

by Aaron Titus, former U.S. Army, Norsat International Military satellite technology is constantly evolving, and it is imperative that organizations involved in SATCOM manufacturing, production and integration track the trends, technology and drivers that fuel the military communications sector. A few years ago, enabling simple communications to and from the battlefield or dispatching orders was […]

MUOS – Overview and Update

by Mike Cagney, dBmCorp, Inc. A major development effort in the design of the Mobile User Objective System (MUOS) is the waveform used in software defined radios (SDR) to provide terminal and manpack UHF communication radios.  Due to the complexity of using Spectrally Adaptive Wideband Code Division Multiple Access (SA-WCDMA) in the MUOS environment, Satellite […]

Improved SWaP with Tactical Hub for MILSATCOM

by Tony Tran, iDirect Government Saving rack space is a priority these days, especially for comms-on-the-move (COTM) and comms-on-the-pause (COTP) missions. That’s exactly why we at iDirect Government have created the perfect solution for these missions with size, weight and power (SWaP) specs ideal for mobile and smaller environments.  We designed the Tactical Hub to […]

MMIC Die Testing Made Easy with Ultra-Wideband 0 dB Attenuator (Thru-Line) Die

by Mini-Circuits I. Introduction: Microwave hybrid circuitry is generally built by integrating several discrete die via wire bonding.  Circuit designers are faced with the task of predicting the performance of hybrids, which comes with some specific challenges.  Most RF/microwave MMIC dice are built with “ground-signal-ground” bonding pads at each of the RF ports to correspond […]

How RF Testing and Traceability Makes the Difference between Generic and “Hi-Rel” (MIL-Spec) Coaxial Cable Assemblies

by Pasternack The use of coaxial cable transmission lines for RF, microwave, millimeter-wave, high-speed digital, and other critical communications is a growing trend in military, aerospace, and high-risk industrial applications. Though the need for robust communication technology is substantial for these applications, the latest budgets and production cycles are often too small and too short […]

Leveraging the Precision of Ion Beam Milling Vs. Chemical Etching of Thin Film Circuits

by SemiGen Manufacturing thin film circuits using an anisotropic ion beam milling process has long been considered a more precise and repeatable approach over the more random and uncontrollable process of material subtraction via chemical etching. This paper describes experiments conducted by Ion Beam Milling, Inc. (now SemiGen, and heretofore referred to as such) that […]

A Quick Guide to Lightning Arrestors

by Fairview Microwave There are two basic ways electricity and electromagnetic energy can destroy a broadcast tower, microwave link, cellular base station, or any other wireless infrastructure: transient voltage spikes and lightning. Of the two, the former is the more frequent and the latter more damaging, and neither can be ignored. When lightning strikes a […]

Block Upconverter Design Considerations for Airborne Applications

by  Mehdi Ardavan, Norsat The recent breakthrough in satellite communication services has provided limitless communication options for airborne applications. With the right equipment and worldwide services, one can provide secure, consistent, two-way broadband communications to various types of airborne missions. This includes mobile Command & Control services (C2); tracking of VIPs and dignitaries; live Intelligence, […]

Flattening Negative Gain Slope with MMIC Fixed Equalizers

by Mini-Circuits I.  Introduction   Equalizers are devices used to compensate for negative gain slope in the frequency response of a wide variety of RF systems.  Unlike a standard attenuator with a flat frequency response, an equalizer is a unique kind of attenuator which exhibits lower insertion loss as frequency increases with some known slope.  […]

Methods to Increase Channel Capacity in RF Data Links

by Stephen Barthelmes and Patrick Sherlock, Triad RF Systems, Inc. & Ken Andrew, Non Line-of-Sight Wireless As more people and organizations demand higher data rates to stream high definition (HD) video for broadcasting, surveillance, or social media applications, the need for capacity continues to increase for wireless communication systems. In addition, once more advanced technology […]