GENERAL DESCRIPTION
NEC TWTA (Traveling Wave Tube Amplifier) LD79U12K delivers an output power of 123 W over the range of 13.75 to 14.5 GHz with a gain of 50 dB.
The Traveling Wave Tube (TWT : LD7246A) in the LD79U12K has been designed and developed upon the NECs advanced technology and enormous experience on a number of TWTs used in satellite ground terminals and terrestrial microwave links.
The very small and light weight Electric Power Conditioners (EPC) designed with sophisticated and experienced circuit technology ensures higher reliability, reduced maintenance costs and improved technical performance.
The LD79U12K is most suitable for a power amplifier in digital communication systems.

FEATURES
○ Light weight, Compact, and Efficient
    The TWT has a dual-depressed collector and is designed to operate at high efficiency across the power output range. The EPC features state-of-the-art techniques to optimize size and efficiency and the combination results in a unit significantly smaller and with less power consumption than a comparable solid state amplifier.
○ Low Distortion
   NEC has developed techniques for the correction of non-linear distortion of gain and phase generated in a TWT.
    As a result, the TWTA has optimum performance across a broad power range and is ideally suited for multicarrier transmission systems.
○ Long Life
    The TWT is designed to have a lifetime of 50,000 hours or more, which in actual usage.
○ Ideal for Digital Systems
    A mini-arcing in the electron gun have been eliminated in the TWT used in the TWTA.
○ Wide range of primary voltage