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Microwave Tubes Division
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What's New

Development of 100 W Peak Millimeterwave Power Amplifier Module

-Ideal for next-generation fixed wireless access base stations and Internet satellite terminals-

NEC Network and Sensor Systems,Ltd. Microwave Tubes Division has announced the successful development of a millimeterwave-band high-performance power amplifier module (MMPM: Millimeterwave Power Module) ideal for next-generation FWA (Fixed Wireless Access) base stations and Internet satellite user terminals. Samples of the new module "LD79A10" are currently being shipped.

The development of "last mile" wireless access broadband connection services, such as FWA or LMDS, is progressing on a global scale, and quasi-millimeterwaves and millimeterwaves are seen as suitable for this field. Countries around the world are also investigating high-speed Internet satellite services that use Ka band (30 GHz band) satellite systems. In response to this growing market, NEC Network and Sensor Systems,Ltd. Microwave Tubes Division has taken the lead and developed a power-efficient, small-and-lightweight power amplifier module with excellent millimeterwave transmission characteristics for use in the FWA base stations and Internet satellite user terminals that supply these kinds of services.

This new product has the following features.

  1. High output in millimeterwave band
    The LD79A10 delivers 100 W peak or 10 W CW in the millimeterwave band over 26.5 to 40 GHz, which could not be achieved using current semiconductor amplifier technology.
  2. Excellent transmission characteristics and low power consumption
    Employment of a new design concept that optimizes the TWT structure and operating voltage at the actual operating level rather than the maximum output power level has enabled the realization of a power amplifier ideal for next-generation FWA base stations that use a modulation system with a large peak factor (nQAM, OFDM, etc.). By using a built-in linearizer, 3rd order intermodulation distortion (IM3) of 40 dB or higher at the rated power of 10 W and 50 dB or higher at 1 W can be realized. The power consumption at the rated power of 10 W is also reduced to less than 100 W, one quarter that of our conventional products.
  3. Long life, high reliability
    Even now high-reliability TWTs are being used as power amplifier elements in communications and broadcast satellite applications. NEC Network and Sensor Systems,Ltd. Microwave Tubes Division has applied TWT technology used in satellites to the new module to realize a level of reliability that will enable a life of at 10 years.
  4. Small and lightweight
    Use of a high-density EPC, utilizing a multi-layer printed-wiring-board transformer and high-voltage circuit potting technology, realizes a small size and light weight (260 x 150 x 40 mm, 1.9 kg).

NEC Network and Sensor Systems,Ltd. Microwave Tubes Division. plans to promote the new concept and applications of this transmission power amplifier module to domestic and overseas vendors of FWA base station equipment and high-speed Internet satellite user terminals, thus contributing to increased demand for millimeterwave-band devices in the Internet market.


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