RF Military Electronics Featured Articles

  1. White Paper: Configuring Phase Coherent RF Measurement Systems: From MIMO To Beamforming
    8/19/2009
    Ever since the first radio waves were transmitted, engineers have continually sought new ways to utilized electromagnetic microwave signals. While RF signals have since been used for a wide variety of applications, two specific applications that utilize one common technology are wireless communications and radar. This article explains the technical requirements to configure a phase coherent RF generation or acquisition system. In addition, a step-by-step process to calibrate the phase delay between multiple RF analyzers to achieve the best possible performance is presented. By National Instruments Corporation
  2. White Paper: Introduction To Mobile WiMAX Test Measurement Solution
    7/21/2009
    Installing the MX269010A Mobile WiMAX Measurement Software in the MS269xA Signal Analyzer supports Mobile WiMAX modulation analysis. Moreover, adding the MS269xA-020 Vector Modulation Generator and MX269905 Mobile WiMAX IQproducer options, supports Tx test of the amplifier and Tx/Rx test of SS/BS with one unit.
  3. Case Study: Cree Speeds Development Of High-Performance GaN Doherty Amplifiers By 70%
    7/7/2009
    GaN has risen in a few short years from a promising RF power technology to a "must have" in amplifiers for defense applications, and is moving quickly into the wireless arena, currently the domain of silicon LDMOS devices. Cree has long concentrated on making GaN a viable alternative, and to achieve this must create new devices, faster, and at lower cost. The company uses AWR's Microwave Office design environment to bring many of these products to fruition, including all of its hybrid-based GaN power amplifiers. One of the most impressive of these is the CDPA21480 Doherty amplifier (the current power architecture of choice for base station transceivers) that delivers 480 W peak and 80 W average RF power for WCDMA applications in the 2110 to 2170 MHz UMTS band. By AWR
  4. Cree Speeds Development Of High-Performance GaN Doherty Amplifiers By 70%
    7/7/2009
    GaN has risen in a few short years from a promising RF power technology to a "must have" in amplifiers for defense applications, and is moving quickly into the wireless arena, currently the domain of silicon LDMOS devices. Cree has long concentrated on making GaN a viable alternative, and to achieve this must create new devices, faster, and at lower cost. The company uses AWR's Microwave Office design environment to bring many of these products to fruition, including all of its hybrid-based GaN power amplifiers. One of the most impressive of these is the CDPA21480 Doherty amplifier (the current power architecture of choice for base station transceivers) that delivers 480 W peak and 80 W average RF power for WCDMA applications in the 2110 to 2170 MHz UMTS band. By AWR
  5. Mimix Broadband Solves An Entire MMIC Chip Using AXIEM 3-D Planar EM Software
    7/7/2009
    Mimix is designing a mm-wave converter using an innovative design in the passive circuitry. If the design technique works the way Mimix believes, they can achieve very aggressive specs for system performance without having to use larger, conventional mm-wave structures resulting in larger die size and thus greater cost. Only by solving the entire structure can Mimix designers verify their design ideas. By AWR
  6. Guidelines For Choosing RF And Microwave Products: Lumped Element (LC) Filters
    6/23/2009
    As one of the most fundamental filter types, LC filters are also some of the most useful, since they are extremely versatile in the responses they can achieve, the types (such as low-pass, high-pass, etc.) they can accommodate, and their potential performance. Like all filters however, the best choice for a specific application results from trade-offs that can only be determined if the designer has considerable experience in filter design. By Anatech Electronics, Inc.
  7. White Paper: Guidelines For Choosing RF And Microwave Products: Lumped Element (LC) Filters
    6/23/2009
    As one of the most fundamental filter types, LC filters are also some of the most useful, since they are extremely versatile in the responses they can achieve, the types (such as low-pass, high-pass, etc.) they can accommodate, and their potential performance. Like all filters however, the best choice for a specific application results from trade-offs that can only be determined if the designer has considerable experience in filter design. By Anatech Electronics, Inc.
  8. Bringing Commercial Manufacturing Practices To Phased Array Systems
    6/9/2009
    Phased array radar and communications apertures have become the technology of choice for many DoD (Department of Defense) applications. Phased array technology is used in systems as diverse as ship-to-ship communications, high power volume search radar, and wideband electronic warfare systems. These systems, while displaying very high performance, are also very costly. By Dr. Douglas J. Carlson, Daniel Curcio, Cheryl Liss, Chris Weigand, And Michael Rachlin, M/A-COM Technology Solutions, Inc.
  9. Article: Bringing Commercial Manufacturing Practices To Phased Array Systems
    6/9/2009
    Phased array radar and communications apertures have become the technology of choice for many DoD (Department of Defense) applications. Phased array technology is used in systems as diverse as ship-to-ship communications, high power volume search radar, and wideband electronic warfare systems. These systems, while displaying very high performance, are also very costly. By Dr. Douglas J. Carlson, Daniel Curcio, Cheryl Liss, Chris Weigand, And Michael Rachlin, M/A-COM Technology Solutions, Inc.
  10. Understanding The Impact Of Spatial Effects On MIMO Wireless Channels
    5/21/2009
    Spatial effects caused by angle spread, antenna radiation pattern, and the surrounding environment introduce correlations between various MIMO channels and, in the process, can substantially impact the performance of a wireless communication system. Advanced channel emulations tools, like Agilent’s PXB MIMO Receiver Tester, address this challenge through support for popular PAS distribution models and by allowing the user to enter physical antenna characteristics directly into the instrument...