RF Military Electronics Featured Articles

  1. The Design Of Ultra Narrow-Band Amplifiers Using Small Signal Varactor Up-Converters For ESM, ECM, ECCM, And ELINT Applications

    A method is presented in this paper for realizing tunable amplifiers with bandwidths of less than 0.5%; without the use of superconductors and cryogenic cooling. This method uses a small signal varactor up-converter to achieve these ultra narrow bandwidths. 

  2. VNA Advances Meet Challenges Of Advanced Radar Systems

    This column focuses on improvements made to VNA architectures and their importance in testing today’s more advanced radar systems.

  3. Shock, Rattle, And Roll: Managing Vibration Effects In VHF Oscillators

    This brief article describes crystal clock typical performance under acceleration and approaches to manage vibration effects. Methods are compared and shortcomings discussed. Intriguing results from a new resonator design are previewed, and a shock test facility is introduced. By Phil Smith, MtronPTI

  4. Testing Modern Radar System Signals: A Primer

    The demands placed on modern radars create challenges for both the radar designer and test engineer. Advanced radar systems require greater precision to measure narrower pulse widths and/or to examine intra-pulse behavior with finer resolution, including rise/fall edge effects or the profile within a pulse compression signal. In order to best understand the complexity of testing today’s radar designs, it is good to first review some basic applications of radar systems and the fundamentals of pulse measurements. By Walt Strickler, senior product manager, Anritsu Company

  5. Smart Microwave Sensors For Critical Site Protection

    Miniaturized, high-performance smart radar sensors with multiple features and operating mode capabilities can easily and effectively protect large open sites by detecting and tracking moving or stationary targets over a 360° azimuth.

  6. The Expanding Role Of GaN HEMT Devices In Military Electronics Design

    In the early 2000s, military designers developing the next generation of high-frequency, high-power amplifiers for radar, communications and EW equipment had reached the performance limits of conventional technologies, namely Traveling Wave Tubes (TWTs), silicon Laterally Diffused Metal Oxide Semiconductor (Si LDMOS) transistors, and gallium arsenide (GaAs) MESFETs. By Tom Dekker, Cree

  7. Fundamentals And Applications Of Polyimide In 3D Thin Film Multilayer Circuitry

    Today, the cost and complexity of all platforms and systems in military and defense technologies are being challenged by the need for high functionality in smaller but less expensive architecture, especially in light of current national budget challenges. By Michael D. Casper, UltraSource, Inc.

  8. For Better SWaP, Choose GaN

    Today’s GaN‐based products are rising to the challenge of rapidly evolving demands for size, reliability, linearity, power density and energy efficiency, by providing RF system engineers with the flexibility to achieve significantly higher power and efficiency, with lower part count, board space and resultant cost.

  9. Detection And Location Of Suspicious RF Traffic — A Geolocation Primer

    Today, more than ever before, monitoring RF spectrum activity in a given geographical area is becoming a necessity rather than a choice. Applications for examining the RF environment are almost boundless, and include regulatory enforcement, corporate security, defense, counter espionage and cyber security. By Malcolm Levy, Vice President, Americas, CRFS Inc., California

  10. Cognitive Tactical Communication Networks

    Cognitive Radio (CR ) has been an intensive topic of research in recent years. Its main applications range from the utilization of TV white spaces to interoperability between large communication systems in all layers.