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  • Jun. 13, 2012
    article
    Microwaves and RF

    Latest Wi-Fi Certification Rolls Out

    With more than 1 billion Wi-Fi devices shipped in 2011 alone, it's indisputable that wires are ceding ground to this technology in the so-called "digital home." Indeed, ABI Research predicts annual growth rate for Wi-Fi consumer devices over the next ......More
  • Jun. 13, 2012
    article
    Microwaves and RF

    Contracts

    Megaphase-Planetary Resources, which plans to mine near-Earth asteroids for raw materials, will utilize the company's GrooveTube cable assemblies. Megaphase's cables were previously used by the Japanese Hayabusa space probe. That probe was tasked with ......More
  • Jun. 13, 2012
    article
    Microwaves and RF

    The Final Round

    After I presented my position based on facts and experiments ("Feedback," March 2012), Mr.Monzello attacks again, without any facts to support his erroneous position. GPS and satellite systems all utilize superheterodyne receivers with noise figures ......More
  • Jun. 13, 2012
    article
    Microwaves and RF

    SDR Technology Marches Forward

    Software-programmable radio technology is steadily replacing fixed-performance conventional radios in a wide range of military and commercial applications....More
  • Jun. 13, 2012
    article
    Microwaves and RF

    Differential DCXO Boasts Sine-Wave Outputs

    To alleviate issues like spurious noise and crystal resonator harmonics, a differential digitally controlled crystal oscillator (DCXO) with sine-wave outputs may present a suitable option for cellular applications. A signal-shaping technique was recently ......More
  • Jun. 13, 2012
    article
    Microwaves and RF

    OMTs Operate Over K- and Ka-Bands

    Models SAT-KB-39642-T1 and SAT-KA-25028-T1 are full-band K-band (18.0 to 26.5 GHz) and Ka-band (26.5 to 40.0 GHz) orthomode transducers (OMT), respectively. These components separate orthogonally polarized signals within the same band, allowing two ......More
  • Jun. 13, 2012
    article
    Microwaves and RF

    Interview: Harvey Kaylie, President, Mini-Circuits

    JB: This past January, we ran a Cover Feature on the MAC series mixers, a line of hermetically sealed mixers based on low-temperature-cofired-ceramic (LTCC) technology. How have they done so far commercially?...More
  • Jun. 13, 2012
    article
    Microwaves and RF

    Radar Systems Ride Device Advances

    Efforts to make a wide array of military and commercial radar systems smalLer, lighter, and less expensive depend largely on increased digital processing and higher levels of analog integration....More
  • Jun. 13, 2012
    article
    Microwaves and RF

    Converting Frequencies With Microwave Mixers

    Frequency translation is necessary within many high- frequency systems, and RF/microwave mixers are the key components providing this vital function....More
  • Jun. 13, 2012
    article
    Microwaves and RF

    Editor's Note

    While all of us at Microwaves & RF appreciate the passion Mssrs. Polivka and Monzello have brought to this debate, we must eventually free our "Feedback" section for other contributors. Hence, we invited both authors to contribute their final comments ......More
  • Jun. 13, 2012
    article
    Microwaves and RF

    Tiny Amp Offers Flat Gain To 6 GHz

    Based on heterojunction-bipolar-transistor (HBT) technology, model CMA-62+ is an extremely broadband amplifier, with flat gain of 15 dB (typically 15.4 dB at 2 GHz) across a frequency range of 10 MHz to 6 GHz. The gain remains flat within 0.7 dB from 50 ......More
  • Jun. 13, 2012
    article
    Microwaves and RF

    Cut PIM In Cables And Connectors

    Passive intermodulation (PIM) is evidence of nonlinear behavior in a communications system and some of its components. PIM is caused by the mixing of multiple tones, which results in unwanted signals. If the levels of these signals are high enough, the ......More
  • Jun. 13, 2012
    article
    Microwaves and RF

    Driver Amp Serves 30 To 4000 MHz

    Suitable for military communications and commercial communications infrastructure applications, model MAAM-010617 is an RF driver amplifier with a frequency range of 30 to 4000 MHz. It offers 13-dB gain over that span, with 4.5-dB noise figure. The ......More
  • Jun. 13, 2012
    article
    Microwaves and RF

    Radar System Tracks Test-Missile Stages

    IN A RECENT DEMONSTRATION, the XSTAR instrumentation radar system successfully tracked both the launch and fl ight of a multi-stage test missile (see photo). This system, which is the brainchild of General Dynamics and STAR Dynamics, promises ......More
  • Jun. 13, 2012
    article
    Microwaves and RF

    SS Method Employs Novel Encryption

    This spread-spectrum communications approach is based on true random sequence encryption for improved data-transfer efficiency and enhanced security compared to traditional systems....More
  • Jun. 13, 2012
    article
    Microwaves and RF

    VCXOs Offer Low Jitter

    The V8F/V8M family of voltage-controlled crystal oscillators (VCXOs) are available at frequencies suitable for Gigabit Ethernet, backhaul communications, and test and measurement applications (including 122.88 MHz, 153.6 MHz, 155.52 MHz, 245.76 MHz, and ......More
  • Jun. 13, 2012
    article
    Microwaves and RF

    Reflector Connects 18.7-GHz Backhauls

    This antenna design features a simple, low-cost construction, but yields high gain and reliable operation for microwave backhaul point-to-point communications links....More
  • Jun. 13, 2012
    article
    Microwaves and RF

    High-Power Coupler Collects 2 To 8 GHz

    Model RCPL-2-8-30d-Nf-600W is a high-power coaxial directional coupler designed for use from 2 to 8 GHz. It can handle continuous power inputs to 600 W and peak input power levels to 10 kW. The component provides 3-dB coupling with Type N female ......More
  • Jun. 13, 2012
    article
    Microwaves and RF

    CMOS RF Front End Improves Universal-Tuner Performance

    Due to the wideband nature of broadcast signals, local-oscillator (LO) mixing problems arise with odd harmonic frequencies. Such issues are not considered in the design of conventional narrowband receivers. Yet this odd harmonic mixing poses a serious ......More
  • Jun. 13, 2012
    article
    Microwaves and RF

    Teseq Announces IFI Acquisition

    In a move intended to broaden its product line in the RF-amplifier market, Teseq has unveiled plans to acquire Ronkonkoma, NY-based Instruments for Industry (IFI). Established in 1953, IFI designs and manufactures RF and microwave, solid-state, and ......More
  • Jun. 12, 2012
    article
    Microwaves and RF

    Hermetic Seals Safeguard Mixers

    Mixers capable of translating one set of signal frequencies to another with minimal loss in the process are invaluable for high frequency receivers and transmitters. Mixers such as the diode-based MAC family of RF/microwave mixers from Mini-Circuits are ......More
  • Jun. 12, 2012
    article
    Microwaves and RF

    Digging Deeper Into DSAs

    Digital step attenuators (DSAs) can provide a simple means of controlling amplitude in a system. But there is much to learn about DSAs before simply specifying one and adding it to a circuit. They are characterized by a number of different performance ......More
  • Jun. 12, 2012
    article
    Microwaves and RF

    Investigating ISM Bands

    Bandwidth may be scarce, but plenty can be found amidst the Industrial-Scientific-Medical (ISM) frequency bands. A number of companies supply short-range communications devices for these frequencies, which include 902 to 928 MHz, 2.4 to 2.5 GHz, 5.725 to ......More
  • Jun. 12, 2012
    article
    Microwaves and RF

    DDS Sources Squeeze Out Noise

    Frequency synthesizers come in many forms, including those based on analog and digital technologies. In spite of the many design approaches, the goal has always been to provide output signals that are unerringly stableand that stability can often be hard ......More
  • Jun. 12, 2012
    article
    Microwaves and RF

    Synthesizer Fits On A Card

    Instruments-on-a-card designs, such as analyzers built into the PXI format, can provide compact building blocks for larger, multifunction systems. The model VMESG frequency synthesizer from Elcom Technologies is such a design, a 1-to-20-GHz source ......More

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