RF Military Electronics Featured Articles

  1. The Effect Of Low-Quality Antennas On Network Backhaul

    This paper describes the effects of various quality variables on microwave antenna performance, and provides insight into the long-term consequences of using a low-cost/ poor-quality antenna. It demonstrates the effect of operators’ preference for low-cost antennas without considering the total cost of ownership, as well as possible ill effects on their quality of service.

  2. Radar Waveforms for A&D and Automotive Radar

    This white paper provides a more detailed view on radar waveforms for Aerospace and Defense and commercial radar systems. Waveforms such as pulse and pulse-Doppler signal, continuous wave and frequency shift keying waveforms are described. 

  3. Doppler Generation For Moving Target Testing

    Channel Environment Replicator (CER) applications simulate and recreate outdoor environments in which radar systems must operate. It’s a much less expensive testing method when compared to the potential complications encountered in more traditional field testing, though testing a moving target in such an application isn’t all that simple.

  4. Radar And Radio Range Simulation Using FODL

    FODL (fiber optic delay line) systems eliminate the need for expensive and time-consuming outdoor range tests for radio and radar systems. This white paper outlines how FODL systems’ accuracy, repeatability, and reliability can save money and time when conducting these tests and also explains for delay line core technology works.

  5. A New Approach To Wireless Broadband Technology For IoT

    Wi-Fi has been incredibly successful in making wireless broadband communication ubiquitous among mobile computing devices like laptops and smart phones. Wi-Fi’s cost-effective, IP-based flat architecture (i.e. a simple wireless extension to Ethernet) is a primary contributor to this success. A positive spiral of R&D investments and manufacturing scale and efficiencies are pushing Wi-Fi’s price-performance ratio to unprecedented levels. This trend will continue for the foreseeable future. By Nimesh Parikh, Doodle Labs

  6. Overcoming Gain Slope Issues In Microwave Modules

    If you are a microwave hardware engineer, you most likely have had a few sobering experiences when testing your new design the first time. This is particularly true for wideband high frequency modules — they almost never look like the model.

  7. 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. The equivalent circuit for the up-converter is presented as well as the circuit configuration of the narrow band negative resistance amplifier. The design and experimental results are presented for a 0.5% bandwidth negative resistance amplifier at 800 MHz; using this unique circuit design. These devices and circuits can be used for electronic warfare applications such as surveillance, electronic reconnaissance, jamming and frequency hopping. By Dr. Alfred I. Grayzel, Dr. Ashok (Ash) K. Gorwara, Paul Kuhn, Planar Monolithics Industries, Inc.

  8. VNA Advances Meet Challenges Of Advanced Radar Systems

    Our first column in this series (Testing Modern Radar System Signals: A Primer) focused on the advances made in radar systems and the traditional measurements made with a vector network analyzer (VNA) to verify their design. In this second installment, the focus will be on improvements made to VNA architectures and their importance in testing today’s more advanced radar systems.

  9. EM Simulation Software for Defense

    This case study explains how CST STUDIO SUITE® electromagnetic simulation software can be used to help with antenna placement and co-site interference, electromagnetic environmental effects, and other factors that should be considered when designing or specifying an antenna for use in a defense-related application.

  10. 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