30 GHz, 40 W CW, Conduction Cooling, Mimimum Size

GENERAL DESCRIPTION

The NEC LD7714 is a PPM-focused traveling wave tube designed for use as final amplifier in the earth-to-satellite communications transmitter, LMDS (Local Multipoint distribution service) and other advanced communication systems.

This is capable of delivering an output power of 40 W over the range of 27.5 to 30.0 GHz and provides a power gain of more than 40 dB at 40 W level.

Furthermore, it is of rugged and reliable design offering long-life service.

FEATURES

Lightweight, Compact and Efficient

The tube has a dual-depressed collectors and designed to operate at high efficiency across the power output range. It features state-of-the-art techniques to optimize size and efficiency.

Low Distortion

Distortion is a very important factor in multiplex digital signals transmission. NEC has developed techniques for the correction of non-linear distortion and phase generated in a TWT. As a result, the TWT has an optimum performance across a broad power range and is ideally suited for multi-carrier trancmission systems.

Simple Cooling System

The tube is conduction cooled, so that the cooling system is simplified.

Rugged Construction

The power gain is designed to be rugged, therefore it is suitable for transportable systems.

Long Life and High Stability

The tube employs an advanced impregnated cathode with a low operating temperature for long life.

Micro-discharge Free

The tube is carefully designed to be free from microdischarge in the electron gun for long term operation, therefore it is suitable for digital communication service.