TOP 100 MILITARY SITES
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| 101st Airborne Units Receive MRAP Vehicles Christmas came a little early this year when the Rakkasans received 18 shiny, new Mine-Resistant Ambush-Protected vehicles Dec. 7. army.mil |
Sensors, Power Dividers / Combiners, Driver and HPA Modules, and Power Systems Elmacom have recently launched the new products listed below.HI POWER DIRECTIONAL RF SENSORA reflectometer is a device used to protect a PA from load mismatches. It delivers a voltage proportional to the mismatch value which is fed back to the input stage of the amplifier to gradually limit its power gain. The Model E10310-01-05 operates from 100MHz to 500MHz with a directivity of 25dB and a maximum insertion loss of 0.25dB. The power handled is 300W CW with a ripple of only ±0.3dB. The size is 88.7mm x 46mm x 30.7mm.90° POWER DIVIDER / COMBINERDesigned for wideband high power application in the V-UHF range, the E10080-01-05 3dB, 90° Hybrid coupler is well suited for a variety of applications as power dividers and combiners, balanced amplifier circuits with low input and output VSWR, voltage variable PIN diode attenuators, antenna feed networks and phase shifters and comparators. This design approach offers smaller size and provides better performance in covering wider bandwidths than other solutions. The device operates in the 100MHz to 500MHz frequency range with a power handling of 200W CW, 0.5dB insertion loss, amplitude unbalance of ±0.35db, phase unbalance of 90° (±3°) and 16dB isolation. The size is 90mm x 55mm x 18mm.DRIVER MODULEThe Model E10420-01-05 is ideal for VHF-UHF radio and jamming applications. This PA operates in the 30MHz to 500MHz frequency range. The output power is 13W at 1dBc and 20W saturated. The gain is 30dB typical and it offers an AGC control range of 60dB. It is just 53.3mm x 25.4mm x 12.7mm in size and weighs 80g. Combined with an E10430-01-05 power module it delivers 80W saturated output power.HPA MODULEThe Model E10110-01-05 HPA operates from 100MHz to 500MHz with output powers at 1dBc of 200W up to 470 MHz and 175W from 470MHz to 500MHz. It delivers a saturated power of 240W up to 470MHz. Its gain is 9dB.It can be combined with driver modules to accept low level inputs for a full output power. The size is 175mm x 130mm x 23.5mm which makes this amplifier suitable for compact radio equipment and jammers.POWER SYSTEMElmacom's wideband E10753-01-04 19in rack-mounted HPA operates from 100MHz to 500MHz in a single band. It delivers 1,000W at minimum 1dBc output power programmable in various step sizes.The HPA supports the following modulation formats: AM, FM, Pulse and CW. Flatness is maintained within ±0.5dB over the entire frequency band and temperature range. The output spurious is at -55dBc. The frequency hopping is accomplished within 100µs.Automatic Levelling Control (ALC) ensures a stable output power into 3:1 load VSWR. For VSWR above 3:1, a turn down protection is provided.Software-enabled 'bias on/off' circuits are employed to operate in noise-quieting (blanking) mode within a maximum of 25µs.VSWR, over-temperature, input overdrive and over-current, and over and under-voltage protections are available. The HPA status is fully monitored by a 40-character, four-line LCD back-lighted display on the front panel which shows all alarms and key parameters' values. The system is either manually or remotely controlled via RS422 multi drop party-line, addressed interface and optionally via Ethernet TCP/IP-based interface. army-technology.com |
02/27/2008: U.S. Airmen Lead Afghan Army Women's Seminar Two U.S. airmen are leading a weekly women's seminar for female Afghan National Army soldiers and civilian workers to help promote change in Afghanistan's male-dominated society. defenselink.mil |
04/01/2008: Basra Violence Proves Tough Days Ahead, Chairman Says The spike in violence in Basra and southern Baghdad proves there are still tough days ahead in Iraq, the chairman of the Joint Chiefs of Staff said during a visit to Pope Air Force Base, N.C. defenselink.mil |
05/01/2008: America Supports You: Organization, Football Legend Partner for Troops Texas-based United We Serve is teaming with football legend Herschel Walker and therapist Jerry Mungadze to offer a series of seminars to help troops manage "life after combat." defenselink.mil |